Specification for electrical automation and instrumentation 02

TECHNICAL SPECIFICATIONS
ELECTRICAL, SCADA AND INSTRUMRNTATION
SYSTEMS
1 General
1.1 Introduction
The works described by this specification covers the supply, installation, testing,
commissioning of the Electrical, SCADA and instrumentation systems of the Wallawatta
Waste Water Treatment Plant in accordance with this specification and associated drawings,
and without abrogating the more extensive details described elsewhere in the specifications
and drawings including the followings.
1.2 Scope of Works
1.3 Applicable Publications and Standards
Standards and publications of the following organizations form part of this Specifications to
the extent indicated by the references thereto unless superseded by Detailed Technical
Specifications.
The following standards and codes (if superseded, their latest updates) shall be applicable to
the installations executed under this contract.
British Standard
BS 7671
Requirements for Electrical Installations. IET Wiring
Regulations. Eighteenth Edition
Sri Lanka Standard
SLS 703
Code of practice for Electrical Installation
Specifications for Electrical and Mechanical works
associated with building and Civil Engineering – Sri Lanka
SCA/8(2000) ICTAD Publications
BS7430:2011+A1:2015 Code of practice for protective earthing of electrical
installations
Harmonized British Standard
BS EN 62305:2011
Protection against Lightning
BS EN 60044:1999
IEC 60046-1:1996
Current Transformers
BS EN 60521:1995
IEC 62053-11:2003
Poly phase kilowatt hour meters
BS EN 60947 4-2
Star Delta Starters
British Standard
BS89-2:1990
IEC 60051-2:1984
Ammeters and Voltmeters
Table 1-1
The following standards and codes (if superseded, their latest updates) shall be applicable to
the switchgear and materials used in installations executed under this contract.

British Standard
BS 1363
Specifications for 13A Plugs, Socket outlets, Connection
Units and adaptors
British Standard
BS5467:1997
Specifications for Electric Cables – Thermosetting
insulated, Armoured cables
British Standard
BS6004:2000(2006)
Specifications for PVC insulated non-armoured electric
cables
British Standard
BS6724:1997(2007)
Specifications for Electric Cables Thermosetting Insulated,
armoured cables
British Standard
BS7846:2000(2005)
Specifications for Electric Cables armoured fire resistant
cables having Thermosetting Insulation
British Standard
BS799-5
Carbon Steel Oil Storage Tanks
BS EN50085
Cable Trunking and Cable Ducting Systems for Electrical
Installations
BS EN50086
Specifications for conduit systems for cable management
BS EN60439
Specifications for low voltage switchgear and control gear
assemblies
BS EN60439-2
Particular requirements for type tested and partially type
tested assemblies
BS EN60529:1992(2004)
Specifications for degrees of protection provided by
enclosures
BS EN 60598
Luminaries
BS EN 60669
Switches for fixed electrical installation
BS EN 60670
Enclosures for electrical installations
BS EN 60898-1:2003
Specifications for circuit breakers for over current protection
BS EN 60947
Specifications for low voltage switchgear and control gear
Table 1-2
2 Electrical Enclosures
2.1 General Requirements
(i) Unless otherwise specified construction of all electrical panels shall be complying to the
IEC61439-1, 61439-2 ,61439-3 product standard
(ii) All switchgear and control gear products shall be complying with the relevant product IEC
standards.
(iii)Switchgears and motor starters shall be supplied from same manufacture in order to achieve
total discriminations and type-2 coordination.
(iv)The panel manufacturer should have latest ISO 9001 certification for manufacturing LV
electrical panels

(v) The electrical panel manufacturer shall have a minimum experience of 10 years in the field
of manufacturing motor control-based switchgear assemblies with draw out compartments.
Past references/records of successfully completed motor control projects shall be provided
for evaluation purposes.
(vi)In case of panel builder using third party enclosure system, panel builder should have valid
licensed agreement made with original enclosure manufacturer. Further panel builder
should provide documentary evidence of at least 3 successfully completed motor control
center projects with draw out compartments completed by the panel builder using the said
enclosure system.
(vii) The Electrical panels shall be suitably constructed for safe, proper and reliable
operation without undue wear, corrosion, heating or other operating trouble.
2.2 Construction of Electrical Enclosure
2.2.1 Free Standing Enclosures
Enclosure system should be fully modular type and shall be able to extendable on either side
by addition of enclosure modules as per future requirements.
The structure of the enclosure and the Mounting plates shall be manufactured using a prime
grade 2mm thick Electro Galvanized steel sheet. Doors and covers shall be of 1.5mm thickness
of the same quality sheets. All the internal separations shall be done using a 1.2mm thick EG
steel sheet. The base frame (Plinth) shall be a fully welded heavy duty type metal frame with
3mm thickness.
All the welded joints shall be fully seam welded and aesthetically finished.
All the parts of the enclosure shall be finished with 60-80 microns of epoxy-polyester powder
coating to provide superior durability and weather resistance. All parts shall be pre-treated with
phosphate free 7 tank chemical pretreatment process with Nano-ceramic or equivalent quality
conversion coating system for superior paint adhesion.
Doors shall be provided with concealed hinges and doors and covers shall be applied with
seamless form in place Polyurethane gaskets to ensure ingress protection as per the
specification.
Form of separation for Main Distribution Boards/MCC panels shall be form 4b. All the internal
separations shall be done using metal partitions and insulation shrouding.
The color of the enclosure system shall be RAL7035
2.2.2 Provision for outgoing cables
Each cable chamber shall have cable entry from Top / Bottom as per the given requirement and
suitable removable gland plates (3mm thickness aluminum gland plates) shall be provided for
this purpose. The cable chamber shall be provided with a suitable supporting arrangement
between the gland plate and terminals, in the middle, to ensure that the cable does not load the
terminals. All feeder terminals shall be segregated fully and efficiently, such that it shall be
possible to work on one set of terminals when the other feeders are live. There shall not be any
live terminal in the cable chamber, liberal space shall be considered for termination.

2.2.3 Wall mounted enclosures
Wall mounted enclosures shall be constructed using 1.5mm thick electro galvanized steel
sheets. All joints shall be fully seam welded and aesthetically finished.
All the parts of the enclosure shall be finished with 60 – 80 microns of epoxy-polyester powder
coating to provide superior durability and weather resistance. All parts shall be pre-treated with
phosphate free 7 tank chemical pretreatment process with Nano-ceramic or equivalent quality
conversion coating system for superior paint adhesion.
Doors shall be provided with concealed hinges and applied with seamless form in place
Polyurethane gaskets to ensure ingress protection as per the specification.
The color of the enclosure system shall be RAL7035.
2.2.4 Accessories for Enclosure system
All retaining catches, screws, and bolts for enclosures shall be stainless steel. Nut and bolts
used in the busbar system shall be stainless steel with strength complying with at least A2-80
grade.
2.2.5 Draw out Compartments
Motor control panels shall consist of draw out type compartments for all the outgoing feeders
and starters with current ratings up to 630A, excluding compartments having VFD, SS staters
above 5KW ratings.
Constructional feature of draw out compartment system shall be as follows,
(i) Panel builder shall demonstrate previous experience (at least 3 successfully completed
projects,10 years’ experience) for supplying draw out type MCC systems
(ii) Draw-out unit shall consist of 4 Positions (Connected, Test, Isolated, & Disconnected)
(iii)Position indication shall be provided for each of the above positions.
(iv)The release mechanism shall be easily operated without the need for any special tool.
(v) The isolated position shall be able to be padlocked as a safety feature.
(vi)The draw-out compartment shall be withdrawn without removing outgoing cables.
(vii) Withdrawable unit shutter interlock systems shall be provided
A mechanical coding system shall be provided to prevent accidental interchanging of same
frame size draw out compartments with different current ratings. Same functional units with
the same current ratings should be interchangeable
The contacts shall be self-aligning, copper which is silver plated and backed by steel clips to
provide high pressure connections. The unit door shall be equipped with the required control
stations, pilot lights, reset pushbutton, and other indicated devices. The vertical power buses
shall be tinned copper full height and rated for the sectional total load. The minimum current
rating for the vertical power buses shall be 300 amperes.
Small openings in the vertical barriers shall permit the plug-in contacts to pass through and
engage with the vertical bus bars.
2.2.6 Seismic test
The electrical panel enclosure system shall be certified for seismic vibration withstand test
from reputed test laboratory as per international standards.

2.2.7 Ingress protection (IP)
Ingress protection (IP) of the enclosure system should be type tested and reports should be
submitted for consultant approval for the below requirements.
(i) Outdoor type Local control panels – SS 316 type, IP65.
(ii) Indoor type Local control panels – Electro Galvanized Powder Coated Mild Steel type,
IP65.
(iii)Indoor type Distribution boards - Electro Galvanized Powder Coated Mild Steel type, IP54.
(iv) Indoor type motor control centers and main distribution panels - Electro Galvanized
Powder Coated Mild Steel type, IP54
All the enclosure systems should be certified for the IK10 mechanical impact test. These test
reports should be submitted for consultant approval.
2.2.8 Copper Bus Bars
The busbars shall be properly segregated, suitably braced with insulated supports. All busbars
shall be fully screened using PVC sleeves with respective phase colors in their compartment
running throughout the length of the panel both vertical as well as horizontal. A suitable
allowance shall be made for bus expansion.
Minimum electrical clearances and creepage distances shall be maintained between Ph-Ph, Ph-
N, Ph-E greater than 25mm. busbar support sizes, the distance between adjacent two busbar
supports shall be selected according to withstand short circuit level. These calculation data or
selection criteria should be submitted to the consultant for approval during the manufacturing
stages of the panel.
All the copper bus bars and connections of the switchboard shall be tinned plated copper with
99.98% purity.
Maximum current densities of the main busbars shall be 2.1A/mm2 up to 800A,1.7A/mm2 up
to 1600A,1.25A/mm2 up to 3200A.The neutral bus bar size shall be selected as the same size
as the phase busbar.
In addition to that, the cross-section of the bus bar shall be selected to withstand the short circuit
level of each panel board.
2.2.9 Earthing of Electrical Panels
The size of the Main earth bar of the electrical panel shall be selected as follows. Tinned Cu
earth bar shall run the full length of the panel board in main panels and MCC panels.
The cross-sectional area of phase line
conductors, S-mm2
The minimum cross-sectional area of the
corresponding protective conductor (PE,
PEN), Spmm2
S ≤ 16 S
16 < S ≤ 35 16
35 < S ≤ 400 S/2
400 < S ≤ 800 200
800 < S S/4
Table 2-1
All the equipment with exposed conductive parts including doors should be connected to the
main earth bar via suitable size earth cables as per IEC61439-1. Outgoing power cables from
VFD to terminal bar shall be suitably shielded with an Al mesh type screen and connected to
the body of the VFD to reduce the electromagnetic interference inside the panel board.

2.2.10 Power Wiring
The panel shall be supplied with all internal power wiring comprising of PVC,1KV insulation
grade, multistranded flexible copper conductors. the minimum cross section for power wirings
shall be 4mm2 used.
Maximum current density up to 63A shall be 5.3A/mm2, maximum current density up to 125A
shall be 3.2A/mm2, maximum current density up to 250A shall be 2.3A/mm2 used. For current
ratings greater than 250A shall be used suitable size rigid tinned copper conductors insulated
with PVC sleeves.
2.2.11 Control wiring
The panel shall be supplied with all internal wiring comprising of PVC,1KV insulation grade,
multistranded flexible copper conductor of 1.5 Sq.mm cross section, and 2.5Sq.mm. the cross
section for CT secondary Circuits. CT circuits for feeders with a current rating above 250A
shall have CT terminals to short circuit secondary winding of CT during maintenance
/replacement activities. Wiring associated with a particular phase shall be the color of that
phase.
All cables shall have crimped terminations and shall be Identified utilizing glossy plastic
ferrules at both ends, showing the wire number as indicated in the schematic diagrams. The
ferrules shall be indelibly marked.
Wiring to items mounted on hinged doors or wiring that is subject to movement shall run in
helical binding.
The binding shall be securely anchored at both ends and sufficient slack provided to prevent
any strain from being imposed on wiring.
2.2.12 Isolation Transformers
In all the panels, relay Control circuits shall be 230V and need to use suitably current rated
400V to 230V isolation transformers to avoid accidental electric shock. transformers shall be
complying to relevant product IEC standard
2.2.13 Indicating Lamps
230V, transformer type indicating lamps shall be used to reduce effect of induced voltages.
Indicator lamps shall be complying to the relevant IEC product standard.
2.2.14 Temperature Monitoring System inside main LV panel boards and MCC panels
A safe and reliable method shall be implemented for monitoring the temperature of ACB
terminals, Busbar joints, and other critical conductor parts. Measurements should be displayed
on the electrical panel. An audible and visible alarm should be generated when the values of
measurements exceeded temperature rise limits defined in IEC 61439-1 standard. If the over-
temperature condition keeps continuing or reaches a critical level, an SMS should be sent to
the maintenance engineer and the technician on duty indicating the condition.
In addition to temperature monitoring in conductors, the ambient temperature and humidity of
each cubicle should be monitored as a backup method. The alarm limit should be calculated
according to IEC 60890 or a similar method.
These measurements should be able to monitor through SCADA system.
During the Factory Acceptance Test (FAT), the temperature rise of the main busbar and main
incoming section at full load should be demonstrated along with the temperature monitoring
system.

2.2.15 Arc Protection System
To minimize the damage to people and property during arc flash condition. It needs to consists
of reliable arc protection system in all critical MSB/MCC electrical panels with a current rating
is greater than 400A which directly fed on CEB transformers with the following characteristics.
(i) Arc flash shall be detected by light and pressure or light and current to minimize nuisance
tripping.
(ii) The circuit breaker of the relevant arc ignition zone should be tripped to stop arc fault
spreading throughout the panel and to ensure power availability without tripping the whole
panel.
(iii)If the circuit breaker of the relevant arc ignition zone fails to trip, the next upstream breaker
should be tripped to ensure safety.
(iv)The electrical panel should be constructed in such a way that to withstand the electro-
dynamic forces during an arc flash. Experience report documents and test reports as per
IEC61641 for constructing that kind of electrical panel shall be submitted.
(v) Panel builder shall demonstrate successfully completed previous installations of complete
arc protection systems. (at least 3 projects)
The status of the arc flash monitoring system should be able to monitor via SCADA system
2.2.16 Space Heaters
Anti-condensation space heaters with thermostat suitable for 230V, 1 PH supply along with
MCB shall be provided in each busbar chamber in main MSB, MCC panels and inside the
enclosure of all the outdoor type local control panels.
2.2.17 Compartment Door Lights
For compartment doors in each MSB/MCC/Distribution panel, LED type panel door light shall
be provided with limit switches. The lux level of the door light should comply to relevant
industry standards.
2.3 Capacitor Banks
2.3.1 Design Considerations for Capacitor Banks
Capacitor bank shall be supplied to improve target power factor above 0.95 in all load
conditions. Capacitors shall be detuned to avoid resonance conditions due to harmonics in the
system using Cu winding type- detune filters. Aluminum winding type detuned filters are not
accepted. Suitable sized Capacitor duty (AC-6b) contactors complying to relevant IEC standard
shall be used to limit inrush current during capacitor switching.
Capacitor step circuits power wirings shall be done using power cables which can carry 1.5
times its rated step current at 400V,50HZ In addition to that, it shall be possible to measure and
display power, currents, harmonic current, and working hours of each capacitor step locally
and through the SCADA.
2.3.2 Specification for Capacitors
(i) self-healing technology, overpressure disconnector, max. allowed fault current 10 000 A in
accordance with UL 810 standard.
(ii) Capacitors shall be heavy duty type.
(iii)The minimum rated voltage shall be 440V.
(iv)Capacitors shall be dry type.
(v) Mean life expectancy shall be up to 200,000 h at temperature class –40/D

(vi)The number of switching operations shall be at least 15,000 switching’s per year according
to IEC 60831-1+2
2.3.3 Over Temperature Monitoring in Capacitor Banks
A method shall be implemented to measure and display capacitor bank ambient air temperature
as well as each capacitor's body temperature. if any temperature exceeds manufacturer
recommended limits alarm shall be generated.
2.3.4 Parameter Monitoring of Capacitor Banks
The following parameters shall be monitored by the SCADA system.
(i) Actual Power Factor
(ii) Weekly Average Power Factor
(iii)Total Harmonic Distortion
(iv)Δkavr (Difference between Actual and target kvar generated)
(v) Active steps
(vi)Number of operations of each capacitor contactor
(vii) Total time of use of the capacitor contactor (working hours)
(viii) Capacitor bank inside ambient air temperature
(ix)Each capacitor body temperature
(x) Alarms
2.4 Air Circuit Breakers (ACB)
Low voltage air-circuit breakers shall be of air brake type, robust and compact design suitable
for indoor mounting available in 4 poles and shall comply with the requirement of IEC 60947-
1 and IEC 60947-2 with a short-circuit withstand capacity (Icw) of not less than the interrupting
capacity of the associated switchboard at 400/415 V ac, 50 Hz for 1 second or higher than Icu
& Ics. Icu shall be equal to ICs (Icu=ICs). The breaker shall provide the class II insulation
between the front panel and internal power circuits to avoid accidental contact with the live
main current carrying path with the front cover open. The low voltage air-circuit breakers shall
be under category 'B' classification system.
The mechanical life shall be at least 12000 operations with a high switching frequency of 60
operations/hour. All 4-pole air-circuit breakers shall have full size neutral up to 4000A and a
higher rating can be an option of 50 or 100%. Rated insulation voltage of the ACB shall be at
least 1000 V and rated impulse voltage of the ACB shall be at least 12KV.
Air Circuit Breakers (ACB) shall be draw out type with a microprocessor-based trip unit
equipped with a touch LCD display to monitor the following parameters and shall be equipped
with Modbus RS485 and Bluetooth connectivity.
(i) Phase currents
(ii) Phase voltages
(iii)Power (Class 2) and Energy
(iv)Power factor
(v) Harmonic distortion (THDv, THDI)
(vi)Provision shall be provided to set controls on voltage in order to analyze the operation
of the system. Any time a control parameter exceeds the preset threshold, an alarm shall
be generated. All the following parameters shall be continuously monitored: Hourly
average voltage value, Short voltage interruption, Short voltage spikes, Slow voltage
sags, and swells, Voltage unbalance, Harmonic analysis.
(vii) Last 30 trips and last 200 events (Eg. Open/close of breaker, alarm, editing
settings, timestamp, etc...)

(viii) The number of operations (Mechanical and electrical), contact wear, load
profile, and the last maintenance carried out.
All the above-mentioned parameters shall be able to monitor via SCADA system
2.5 Molded case circuit breakers (MCCB)
MCCBshall comply with the requirement of IEC 60947-1and IEC 60947-2with a short-circuit
breaking capacity (Icu) not less than the interrupting capacity of the associated switchboard at
400/415 V ac, 50 Hz breakers should be selected that Icu shall be equal to Ics (Icu=Ics) The
MCCBs shall have a combination of thermal and magnetic tripping giving an inverse time-
delay protection against sustained overloads and instantaneous tripping under heavy overloads
and short circuits. Breakers shall have a quick make, quick break over-center switching
mechanism that is mechanically trip-free from the handle so that contacts cannot be held closed
against short circuits and abnormal current. Tripping due to overload or short circuits shall be
clearly indicated by the handle assuming a position mid-way between the manual ON and OFF
position. Poles shall be constructed to open, close, and trip simultaneously. Rated insulation
voltage of the MCCB shall be at least 690V and impulse voltage level is at least 8KV. For the
current ratings up to 250A thermomagnetic type trip units with magnetic trip and thermal trip
adjustable type shall be used. For current ratings greater than 250A, microprocessor-based LSI
type (L-overload protection, S-selective short circuit protection, I-instantaneous short circuit
protection) trip units with Modbus RS-485 communication shall be provided. the data of the
communication enable breakers shall be able to monitor through SCADA system.
2.6 Circuit Breaker Coordination
Upstream circuit breaker shall not trip before downstream breaker due to a downstream short
circuit, overload, or ground fault. All major components like ACB/MCCB/MCB/Contactors
shall be the same make and the total electrical system shall be configured or selected to achieve
total discrimination
2.7 Surge Arresters
Main power incoming panels shall have class 1 type SPD with the following minimum
specifications.
(i) Arrester Class -I
(ii) Discharge current-Nominal 25 kA, Maximum 60 kA, Total 175 kA
(iii)Impulse current - I (imp, 10 / 350 μs) 25 kA, I (total, 10 / 350 μs) 100 kA
(iv)Maximum continuous operating voltage (Uc)-(L-PE) 255 V (L-L) 440 V (L-N) 255 V
(N-PE) 255 V
(v) Voltage Protection Level (Up) -2.5 kV (N-PE) 2 kV
(vi)Short Circuit Withstand Icc-50KA
Sub Distribution boards shall have class 2 type SPD with the following specification
(i) Arrester Class-II
(ii) Discharge Current -Nominal 20 kA, Maximum 40 kA, Total 160 kA
(iii)Maximum Continuous Operating Voltage (Uc)- (L-PE) 275 V, (L-L) 440 V, (L-N) 275
V, (N-PE) 275V
(iv)Voltage Protection Level (Up)- (L-N) 1.4 kV, (N-PE) 1.4 kV
(v) Short Circuit Withstand Icc-50KA
2.8 Contactors
For motor starters (DOL/Star-delta starters/forward reverse) suitably sized AC3 duty type
contactors complying to IEC 60947-4-1 or EN 60947-4-1. 1.01 shall be used. Contactors shall

be electro-magnetically controlled, double air-break type. Contactors shall be four-pole, triple-
pole, double-pole or single-pole as shown on the drawings. The mechanical endurance of the
contactors shall not be less than 3 million no. load operating cycles. The contactor should be
modular in design with minimum inventory requirements and built -in mechanically
interlocked wherever required. They should be suitable for the addition of auxiliary contacts
and other electrical auxiliaries without any compromise on the performance or the operation of
the contactors.
The contacts should be of fast opening and fast closing type. The making and breaking capacity
values of the contactors should be as follows
For AC-3 duty
(i) Making capacity equal to or more than 10 Ie
(ii) Braking Capacity equal to or more than 8 Ie,
For AC4 duty:
(i) Making capacity equal to or more than 12 Ie,
(ii) Braking Capacity equal to or more than 10 Ie,
Contactor shall have high mechanical durability of min number of operating cycles is 10
Million. The contactors should be capable of frequent switching and should operate without
derating up to 55°C for AC3 applications. They should be climate proof. The rated voltage of
the contactor and the rated insulation voltage shall be at least 690V. The rated Impulse voltage
of the contactor should be at least 8 KV. The control and power terminals should be at separate
layers preferably with color coding (ex- black for power and white for control). All contactors
power connection shall be finger safe (IP 2X).
2.9 Electronic Overload relays
For motor starters KW rating greater than 5KW (DOL/Star-delta starters/forward reverse)
electronic type overload relays which complying to IEC 60947-1,60947-4-1,60947-5-1 shall
be used. The relay shall be directly connected to the contactor. The relay shall be providing
reliable protection in event of overload and phase failure condition in motor. rated insulation
voltage shall be 690V.automatic or manual reset should be selectable. reset push button shall
be provide in relevant compartment door in order to mechanically reset relay without opening
compartment door.
2.10 Motor Feeders type 2 coordination
All the motor feeders should be equipped with type 2 coordination. Coordination selections
shall be provided to the consultant approval before manufacturing process.
2.11 Variable Frequency Drives
This specification is to cover a complete Variable Frequency Drive (VFD) consisting of a pulse
width modulated (PWM) inverter designed for use with a standard AC induction motor, which
specially design for Water and Wastewater applications.
The VFD manufacturer shall supply the VFD and all necessary options as specified. VFDs that
are manufactured by a third party and “brand labeled” shall not be acceptable. All VFDs
installed on this project shall be from the same manufacturer. The VFD manufacturer shall
have a minimum of 30 years of experience in VFD design and manufacturing and have the
adequate business volume to provide credibility in its commitments and capability for long-
term support
All the VFD’s shall be able to connect to the SCADA system to monitor parameters (current,
harmonic distortion, power factor, Alarms, inside temperature, working hours, DC bus voltage)
For detailed specifications for VFD, please refer to section xxx

2.12 Soft starter
This specification is to cover a complete Soft starter (SS) designed for use with a standard AC
induction motor, which specially design for Water and Wastewater applications. The soft
starter shall be constructed and tested under the international IEC standards EN 60947-1 and
EN 60947-4-2 and respect the following EC directives:
(i) “Low voltage Equipment” No. 2006/95/EC
(ii) “Electromagnetic compatibility Directive” (EMC) No.2004/108/EC
The soft starter shall have documented coordination with circuit breakers or fuses for short-
circuit protection.
Suppliers need to submit type-2 coordination charts for the selection. diagnostic details and
operating parameters (current, harmonic distortion, power factor, Alarms, inside temperature,
working hours) shall be able to monitor via the SCADA system using Modbus RS485.
For detailed specifications for soft starters, please refer to Section YYY
2.13 Harmonic Distortion
Total harmonic distortion at the point of common coupling shall be complying to the IEEE 519
harmonic regulation guidelines. To minimized total harmonic distortion during all the varying
load conditions of the plant Active harmonic filters need to be used. Passive filter shall not be
accepted. At least three number of project references with satisfactory performance evidence
shall be provided for the active harmonic filter based harmonic mitigation systems.
2.14 Design Report
Following detailed reports for each main panel and MCC panels shall be submitted to the
consultant.
(i) Busbar selection calculations, busbar joint performance calculations
(ii) Short circuit withstand calculation as per IEC60865
(iii)Temperature rise calculation as per IEC60890 to make sure that panels are not overhead
and within limits
(iv)Arc flash hazard category calculation.
(v) Circuit breaker discrimination report of electrical panels.
(vi)Motor starters type2 coordination selection.
(vii) Harmonic mitigation system designing report.
2.15 Country of Manufacture of Equipment
Main components such as ACB, MCCB, MCB, RCCB, power analyzers, power factor
controllers, arc flash protection relays, Drives, and soft starters shall be originated and
manufactured in Europe/USA.
2.16 Warranty Terms
The General Warranty period is two years from the date of commissioning.
2.17 Factory Testing
Following tests shall be performed at the factory and relevant test reports should be submitted
for consultant approval.
(i) Routing inspections as per IEC 61439-1.
(ii) Power frequencies withstand test.

(iii)Insulation resistance test.
(iv)Earth resistance testing of electrical panels
(v) Temperature-rise verification test with a full load of main breaker and main bus bar
system.
(vi)Fully functional testing of control circuits
(vii) Arc flash protection relay test.
2.18 Technical Booklet
A technical booklet consists of the following mandatory documents shall be submitted for each
panel during the commissioning stage.
(i) As-built drawings
(ii) Factory test reports
(iii)Technical catalogs /user manuals of equipment’s
(iv)Electrical panel troubleshooting guidelines
2.19 Spare parts
Following mandatory spare parts shall be provided by indicating unit prices. In addition to that
manufacturer recommended spare parts shall be provided by indicating unit prices for maintain
18 years trouble free operation
(i) VFD-1 unit for each different KW rating
(ii) Control card for VFD - 1 unit for each different model
(iii)Ventilation fans for VFD- 2 units for each different KW rating
(iv)Soft starter- 1 unit for each different KW rating
(v) Control card for soft starter -1 unit for each different model
(vi)Ventilation fans for soft starter- 2 units for each different KW rating
(vii) ACB-1 unit for each different current rating
(viii) MCCB- 2 units for each different current rating
(ix) MCB- 2 units for each different current rating
(x) Digital power analyzer- 2 units
(xi) Arc flash protection relay – 1 unit for each different relay model
(xii) Earth leakage relay- 2 units for each different relay model
(xiii) Contactors- 2 units for each different KW rating
(xiv) Electronic overloads relay- 2 units for each different KW rating
(xv) Micro relays – 20 units
(xvi) Indicator lamps -20 units from each different color
(xvii) UVT coils for ACB- 2 units
(xviii) Shunt opening and closing coils for ACB – 2 units by each type
(xix) UVT coils for MCCB- 2 units for each different model
(xx) Motor operator for ACB- 2 units
(xxi) Motor operator MCCB- 2 units for each different model
(xxii) Instrument fuses-20 units
(xxiii) Current transformers- 1 CT for each different current rating
(xxiv) Ammeters-1 unit for each different current rating
(xxv) Voltmeters- 1 unit for each different voltage rating
(xxvi) Capacitor contactors- 2 unit for each different KVAR rating
(xxvii) Capacitors- 1 unit for each different KVAR rating
(xxviii) Detune filters- 1 unit for each different KVAR rating
(xxix) Ventilation fans- 10 units for each different frame size
(xxx) Isolation transformers- 1 unit for each different rating

2.20 Testing equipment’s/Tools
Following mandatory testing equipment’s shall be provided by indicating unit prices
(i) Digital insulation resistance tester – 1 unit
(ii) Digital clamp meter (Voltage rating up to -800VAC,220VDC, Current up to 2000AC)-
2 units
(iii)Current leakage testing meter- 1 unit
(iv)Digital multimeter -2 units
(v) 4-20ma current and 0-10VDC voltage signal tester- 1 unit
(vi) Thermal image camera- 1unit
(vii) Phase sequence meter- 1 unit
(viii) ACB lifting trolley- 1unit
(ix)ACB/MCCB trip unit testing kit with relevant software and cables
(x) VFD/Soft starter online troubleshooting software and cables- 1unit for each type
(xi)Complete Arc flash protection PPE Kit (including voltage gloves and shoes (category
-2) – 1unit
(xii) Complete screw drive/tool kit set to dismantle VFD/Soft starters- 1 lot
(xiii) Complete screw drive /tool kit set to dismantle ACB/MCCB- 1 lot
(xiv) Complete screw drive/tool kit set to dismantle enclosure system- 2 lots
(xv) Torque wrenches with die set for torque limit less than 20NM- 1 lot
(xvi) Torque wrench with die set for torque limit 20NM-100NM- 1 lot
3 Variable Frequency Drive - VFD
3.1 Detail specifications for VFD
A. The VFD must be designed specifically for the Water and Wastewater market. General-
purpose products are not acceptable.
B. The VFD shall have the same customer interface, including control panel, I/O
connections, and firmware, regardless of power, voltage rating, or harmonic mitigation
solution.
The VFD shall be solid-state, with a Pulse Width Modulated (PWM) output. The VFD shall be
a Sensor less Vector AC to AC converter utilizing the latest Insulated Gate Bipolar Transistor
(IGBT) technology.
The VFD shall employ a Sensor less Vector inner loop torque control strategy that
mathematically determines motor torque and flux. The VFD must also provide an optional
operational mode for V/Hz operation.
C. Electrical network.
1. The VFD shall be rated to operate from 3-phase, 380 to 480 VAC,
2. The VFD shall operate with supply frequencies from a minimum range of 47.5
to 63Hz. Nominal power ratings shall be met in the allowed frequency range.
3. The VFD shall employ a full wave rectifier to prevent input line notching and
operate at a fundamental (displacement) input power factor of 1 (unity) at all
speeds and nominal load.
D. EMC, Electromagnetic compatibility
1. The VFD shall have inbuilt EMC/RFI filters as standard. It shall be possible to
disconnect the EMC filters without specific tools (for IT and corner grounded
TN electrical systems).
2. The VFD shall conform to the European Union Electro Magnetic Compatibility
(EMC) Directive EMC 2014/30/EU, a requirement for CE marking.

3. The VFD shall comply with the EMC Product Standard for drives EN 61800-3
Class C3 (2nd environment, restricted distribution) as standard
E. Environmental conditions
1. Temperature
a.The VFD shall have a minimum temperature range for transportation
and storage from - 40 to 70 °C.
b.The VFD shall operate without disturbances in continuous ambient
temperatures with a minimum range from -15to 50 °C (no frost allowed).
derating to be selected as necessary.
2. Humidity
a.The VFD shall be designed to operate in ambient conditions of relative
humidity with a minimum range from 5 to 95% (without condensation).
b.A motor heater function shall be supported to prevent condensation and
corrosion of the motor.
3. Contamination
a.The VFD shall operate in contamination levels according to IEC 60721-
3-1, IEC 60721-3-2,and IEC 60721-3-3; Chemical gases min. class 3C2,
Solid particles class 3S2.
b.All printed circuit boards (PCB) shall be conformally coated to extend
the electronics lifetime in harsher environments.
F. The VFD output frequency shall be adjustable between 0 to 500Hz, forward or reverse.
Operation above motor nameplate shall require programming changes to prevent
inadvertent high-speed operation.
G. Maintenance
1. The VFD shall have cooling fans that are designed for easy replacement. The
fans shall be designed for replacement without removing the VFD from the wall
or the removal of circuit boards.
2. The VFD shall record a) VFD on time, b) VFD run-time, and c) cooling fan on
time for maintenance logging purposes.
3. The VFDs cooling fans shall have a minimum expected lifetime of 6 years.
4. Any battery used in the VFD shall have a minimum expected lifetime of 6 years.
H. Motor control.
1. The VFD shall be capable of controlling an induction motor.
2. The VFD shall include scalar and vector control modes with independent
control chains and parameters for each control mode.
3. The overload rating of the VFD shall be 110 % of its rated normal duty current
for 1-minute every10 minutes and with a minimum of 130 % for a minimum of
2 seconds at starting, then as long as allowed by drive temperature. Overload
ability shall be available at all times - not only at the start.
4. The VFD shall be capable of sensing the loss of load (broken belt / broken
coupling / dry pump) and signal the loss of load condition. The VFD shall be
possible to be programmed to signal this condition via a control panel warning,
relay output, and/or over the serial communications.
5. The VFD shall include a standard embedded functional safety feature Safe
Torque Off, (STO), to make the motor mechanically safe.
6. The VFD shall include an energy optimization circuit (flux optimization) that
will automatically reduce applied motor voltage to the motor to reduce energy
consumption by up to 10% and lower audible motor noise.

7. Flux braking shall be available, where the VFD controls the motor to dissipate
the extra rotary energy as heat whenever braking is required. It shall be possible
to use this flux braking feature to decelerate the motor from one speed to another
– not only for stopping the motor.
8. Power Loss Ride-Through shall be programmable. If the incoming supply
voltage is cut off, the VFD continues to operate using the kinetic energy of the
rotating motor. The VFD continues to be operational as long as the motor rotates
and generates energy.
9. The VFD shall include a switching frequency control function. This adjusts the
switching or carrier frequency, based on actual VFD temperature and allows the
highest carrier frequency without de-rating the VFD or operating at high carrier
frequency only at low speeds (temperature fold-back). It shall be possible to set
a minimum and a reference switching frequency.
10. The VFD shall have three programmable critical frequency or critical speed
lockout ranges to prevent the VFD from operating the load continuously on an
undesirable speed range (skip frequencies)
I. Software features -VFD shall have the following software features
1. The VFD shall have the ability to calculate the flow based on the measured
pressure difference (using pressure sensors) or the power curve of the pump
(sensor less).
a.There shall be a multiplier parameter to enable correction for the
calculation.
b.There shall be a specific energy parameter to measure the actual flow
per input power ratio. The motor speed can be adjusted to locate the
most economical pumping point.
2. The VFD shall have two additional ramps for quick acceleration and two
additional for deceleration to reduce wear of the mechanical parts in
submersible pumps.
3. The VFD shall have a specific “Pump cleaning” functionality, based on a series
of rapid reverse and forward rotation of the impeller, to prevent pump and pipe
clogging.
a.The VFD shall have the cleaning cycle counter and user-programmable
cleaning count time to give a warning and indicate the need for manual
inspection.
b.The cleaning function shall consist of forced stopping, reverse and
forward rotations to allow debris to be removed from the impeller.
c.There shall be a cleaning cycle status visible on the control panel screen
when the cleaning function is active for monitoring the cleaning
progress.
d.The VFD shall resume normal operation after the cleaning cycle is
complete.
4. The VFD shall have a programmable Sleep functionality for PID control in
pumping systems to stop the pump during low demand.
5. All setpoints, process variables, etc. shall be accessible from the serial
communication bus.
6. A real-time clock and calendar shall be available as standard for giving true time
and date information to fault event history. The real-time clock shall have a
minimum of 10 years of power-off back-up without optional components. The
backup battery shall be replaceable without opening the VFD enclosure

7. Fault Logger: A fault logger shall accommodate seven diagnostic values
together with a date and time stamp.
8. Built-in Energy Calculators: There shall be built-in counters for calculating
energy savings achieved with the VFD. Used and saved energy, CO2 reduction,
Saved money, Programmable kW rate
9. Underload and overload curves shall be user-definable.
10. VFD shall be able to connect a cloud-based online diagnostic monitoring system,
necessary hardware and software shall be considered for this purpose.
J. Protections-VFD shall consist of the following protection features
1. Dry pump Protection: (Prevent the pump from running dry. Protects the pumps
bearings and shaft seal from damage when there is no water in the pump)
2. Overvoltage and under-voltage controller
3. Ground Fault (Earth-leakage) supervision
4. Motor short-circuit protection
5. Output and input switch supervision
6. Overcurrent protection
7. Phase-loss detection (both motor & line)
8. Underload and overload supervision
9. Freely configurable supervisions for any parameter or signal to trigger an action.
10. The VFD shall have pump protection functions for flow and pressure to avoid
damages to the pump and for leakage detection.
a.Inlet protection to avoid dry run, cavitation, and blocked pipe.
b.Outlet protection to avoid high pressure and leakages.
c.Stall protection to avoid running locked pumps.
K. User interfaces
1. The control panel shall be detachable in all types of VFD protection classes
and/or enclosures, without tools to allow easy commissioning and programming
of multiple VFDs.
2. The control panel shall have a real-time clock with battery backup for adding
timestamps to events, as well as for use with timer functions.
3. The display shall be incomplete words, in a language selectable by the user, for
programming and fault diagnostics (alphanumeric fault codes are not
acceptable).
4. The control panel shall provide interactive assistants (wizards) to help to
commission and use the VFD.
5. A dedicated “Help” button shall be available on the control panel. The Help
button shall provide context-sensitive assistance for programming and
troubleshooting.
6. The control panel shall have a menu, which contains diagnostic data about the
VFD operation. The data shall include data about active faults, warnings, and
events. In addition, the data shall contain a summary of VFD active control
sources.
7. There shall be an editable home-view in the control panel to allow different
customer-specific configurations.
8. The control panel shall include Hand-Off-Auto selections and manual speed
control.
9. There shall be a possibility to reset the VFD from the control panel.
10. A listing of changed parameters shall be readily available to assist with
commissioning and troubleshooting.

11. The VFD shall include passcode protection against unauthorized parameter
changes. The passcode and the protection level shall possibly be defined by the
user.
12. The control panel shall contain at least one backup of the VFD settings. Back-
up information shall be possible to be saved on the control panel both manually
and automatically.
13. The control panel shall have the capability to copy VFD settings from one VFD
to another VFD, regardless of the VFD power, voltage, or enclosure rating.
14. The user shall be able to take a screen capture snapshot of the display with the
control panel and be able to download the screen capture for the user’s computer
for further purposes.
15. The user shall be able to connect a PC tool with a standard USB cable to the
control panel to set up and control the VFD. It shall be possible to connect the
USB cable without using any tools.
16. The VFD shall provide a possibility for wireless Bluetooth communication to
allow working outside the arc flash boundary area and/or when there is no easy
or safe access to the VFD.
4 Detail specification for Soft Starter
A. General specification
1. Soft starter shall be thyristor-based three-phase control with
operation voltage: 220 - 600vac, 50/60Hz.
2. Wide rated control supply voltage: 100 - 250vac 50/60 Hz
3. Built-in bypass to reduce energy consumption at full speed and increase the
lifetime of the soft starter.
4. The soft starter shall have a built-in Modbus RTU for communication with
SCADA
5. The soft starter shall be equipped with one analog output to indicate the
motor current
6. The soft starter shall have a minimum of 3 signal relays output for the run,
bypass (top of the ramp), an event signal.
B. User interface
1. The soft starter shall support English languages in both the manual and HMI,
2. Fault messages shall be displayed in complete English words to allow the
user to understand the display without the use of a manual or cross-reference
table.
3. The soft starter shall have a detachable keypad with a graphical LCD for
panel door mounting. The keypad shall have start and stop buttons, an
information button for access to a built-in manual, a USB port for
connection to a pc. Password protection in the keypad shall be available to
prevent unauthorized changes to the programming.
C. Environmental conditions
1. The soft starter shall have coated PCBs to withstand harsh environments.
D. Motor starting, stopping, and operation
1. The soft starter shall have the following start ramps available:
i. Voltage start ramp
ii. Torque start ramp
iii. Full voltage start

2. The soft starter shall have the following stop ramps available:
i. Voltage start ramp
ii. Torque start ramp
iii. Dynamic brake
3. The soft starter shall have a torque control and pump cleaning feature, to
eliminate water hammering and prolong the lifetime of the pump system.
4. The soft starter shall have the following types of the current limit, making it
possible to run the motor in a weaker network and hence improving the
availability of the system/equipment
i. Current limit
ii. Current ramp
E. Built-in motor protection and warnings
1. The soft starter shall integrate motor and load protections, which shall under
no circumstances be disabled when the integrated bypass is used.
2. The soft starter shall also be able to present a warning before tripping for
each protection.
3. The soft starter shall have the following motor protections available along
with the warning function.
4. Electronic overload protection, class 10a, 10, 20, 30
5. Locked rotor protection
6. Motor underload protection, both current and power factor.
7. Current imbalance protection
8. Voltage imbalance protection
9. Overvoltage and under-voltage protection
10. Phase reversal protection
11. Total harmonic distortion (THD)
12. Fans fault
13. Thyristor overload
14. Number of starts
15. Motor runtime limit
16. soft starter shall also have earth-fault protection and input for PTC and pt100.
F. Built-in diagnostics
The soft starter shall have the following diagnostics features:
1. THD(u)-total harmonic distortion
2. The counted number of start sequences
3. Motor runtime measurement
4. Thyristor runtime measurement
5. Auto phase sequence detection
6. Electricity metering
7. Voltage sags detection
8. Time to trip estimation
9. Time to cool estimation
G. Fault detection
The soft starter shall provide the following fault detection, to protect both the
starting equipment, the load, and the soft starter itself.
1. Phase loss
2. High current
3. Low control supply voltage
4. Fault connection
5. Bad network quality

6. Short circuit fault
7. Heatsink over-temperature fault
H. Fault history
1. The soft starter shall show the event log of 100 latest events in chronological
order, with “type of event such as faults, protections, warnings, parameter
changed, run” along with the date.
5 Automation System
5.1 Specification for SCADA System
1. Preferred Brands/Makes - ABB, Schneider, Siemens
2. Country of Origin/Manufacture - Europe/USA/Australia
3. General - It shall be standard, commercially available and proven SCADA package
with all required Latest Service packs/Patch Software suitable for process control and
data acquisition. It shall be possible to configure as well as running standard plant HMI
for minimum number of 2000 tags. minimum shall be adequate to process requirement.
4. System Architecture - SCADA system shall consist with Following Client server
Architecture. shall be Support Hot redundant architecture and should have minimum
time to Server changeover. Redundant Architecture will have support for redundancy
in Data acquisition, Trending, Alarming and Event triggering will provided to achieve
high reliability and availability. All the required license and computer/server shall be
provided by contractor for seamless operation
a. Primary server with hot standby secondary server (data synchronization
between shall be real time)
b. two Nos of control type clients
c. one Nos of view only clients
d. two Nos of web view clients
5. Scada System Redundancy - Both SCADA servers should be able to fetch data from
PLC and other hardware independently. The operator stations should be able to fetch
data from servers. Redundancy should be provided for SCADA servers. i.e. if SCADA
server fails, the operator stations should be able to fetch data from another SCADA
server
6. Engineering Work Station Computer –
Users shall be able to add, delete and modify I/Os, graphics and supervisory control
logic online without shutting down the plant. The Software Development Package shall
include Data Acquisition & Control, Data Analysis, Data presentation and Report
generation. Online update of SCADA application, running on Clients and View station
PCs, should be possible from a centralized Development station Cum PC.

7. Configuration - Configuration of SCADA using structural tree that allows the whole
application to be seen at a glance. Single executable software for whole configuration
like tags, hysterics, alarms, communication, etc.
The software shall have in built standard screen objects library for slider, browser,
display, bar graphs, trends for real time, animation, toggle, momentary, transparent
buttons, ActiveX Controls for windows-based System etc. There shall be an object
builder wherein custom objects can be added to library. Facilities to access all
properties and functions related to each object in the application and facility to
manipulate all the properties through the script. Cross-reference tool to show the total
cross-references in the application.
The software shall have communication drivers for standard PLC’s and other devices.
It shall be possible to connect multiple drivers simultaneously. It shall have features to
support redundant communication/connections, communication failure detection and
recovery etc.
The SCADA System should have a single configuration environment for configuring
the whole project. The software should facilitate data entries at a single configuration
environment to prevent human errors.
The software shall have in built script programming tool, function library, and cross-
reference tools; Quick help tutorial with on line help facility. It should programming
tool/inbuilt Functions to Log operator action, operator Log in/Logout, events data in
Runtime.
The project environment should have features like:
 Creating the configuration files for the instruments
 Creating alarm groups
 IO manager for allocation of tags to the instruments
 Deploying the project to the operator station from the Development/ Engineering
station
8. Faceplates - Faceplates for all IO tags, control modules should be available by default
in the SCADA software. It should allow some operator interaction with the device and
provide an operational summary which should be displayed. The operator should be
able to control the device by means of pushbuttons (for mode selection or for state
selection on a digital device) or numeric values (for analog values such as set points).
Numerical values can be set either by selecting the displayed value and entering a new
value or by selecting the associated bar graph and ramping up or down The SCADA
system should have a faceplate for PID, Pulse Input, Analog Input, Device Control, and
Input Selector function blocks etc. It should also contain a detail display for the PID
parameters, and Device Control blocks
9. User Interface - The user interface shall support standard keyboards, function keys,
mouse, touch screens and other pointing devices. The UI should have a common and

consistent look and feel. Context sensitive help with online tutorial shall be provided
for fast development of HMI. The display should be user configurable. Screen
navigation shall be designed so that the operator can page through displays at different
levels starting with over-view, area displays, group displays, fascia displays, current
and historical trend groups etc. A permanent alarm banner should be provided for
immediate indication of abnormal plant conditions.
10. Operator Interface Graphics - Object Oriented GUI enabling quick development of
screen objects with full animation and object library builder. Mimic display with 2D,
3D photo import facility, scrollable mimic, bitmap support, graphical library for
automation symbols (including pumps, valves, faceplates, meters, check boxes etc.),
capability to handle all depths of colors and settings of resolution in MS Windows.
Fully animated graphics support with built in translation, rotation and dynamic sizing
facility. Parameter display using screen objects like bar graph, trends, displays, gauges,
browsers, animation, alarm windows, message boxes multivariable read displays,
numeric readouts etc. and other GUI objects like pushbuttons, spin buttons, sliders, list
boxes etc. shall be available. Historical and real time trending with operator annotation.
It shall also have necessary pan and zoom facilities. Tools that allow rapids searches
through large amount of historical data shall be provided. Operation Server/Viewer
should allow to dynamically specify different historical file data sources for each of the
pens on a trend chart. The Operation Server/Viewer should preferably permit minimum
of 8 pens per trend chart. The users should be able to view historical data at any given
time.
11. Alarm Management - Simple & Complex alarm capabilities, multiple alarm facilities,
multiple alarm priority levels, alarm filtering functions, alarm annunciation with color
changes, automatic report generation of alarm history with date/time sorting, alarm
logging, display, triggering of events/Function call etc. shall be available. Custom-built
alarm report generation shall also be possible with text, graphics support. SCADA
software should allow Pop -up messages/window to be configured to alert the operator
in case of important alarms.
12. Real time Database - The real time database shall be capable to manage and store all
process data. Database shall support sufficient number of discrete, real, integer and
string variable tag names. Utilities to support database exporting/importing to /from
spreadsheets, other databases, editors’ etc. and ODBC support to share data with
standard RDBMS like Oracle, Sybase, and Microsoft SQL etc. shall be available.
13. Data Logging, Reporting and Documentation - Data logging including event logging
of set point adjustment and custom events shall be available. Reports: Text and
graphical reports based on real time and historic data, pre-configured alarm and event
reports, shift-wise, daily, weekly reports, automatic and on request report printing shall
be available. System shall be capable of providing accurate, customized reports. Front
end, Report viewing/Printing tool, customized as a part of SCADA will be developed
by supplier or required Software for the same to be supplied & configured.

14. Security - Multiple level securities with password protection, facilities to lock
executables to prevent unauthorized modification. It should have minimum of 4 levels
of password so that configurations of the above features can be disabled/ enabled
depending on password level. There should be provision for supervisor who can add/
delete/ modify users. Also, there should be provision for disabling all the control
function. The GUI program should mask all other programs so that operator will be
able to operate only GUI program. Other programs shall be available to only to a person
with highest level of Password.
5.2 Specification for Programmable Logic Controller (PLC/PAC)
1. Preferred Brands/Makes - ABB, Schneider, Siemens
2. Country of Manufacture - Europe/USA
3. General - System is consisted with two major systems, station-1 and station-2. To
achieve high availability and reliability flowing key points should be considered when
designing automation system, number of PLC units shall be selected as per the guidance
of employer engineer
a. PLC should be hot standby redundant
b. IO module shall be hot swappable
c. Data communication with remote IO modules shall be redundant
d. Data communication between PLC and SCADA should be redundant
e. PLC data communication with remote IO modules and SCADA system shall
be Modbus TCP-IP/profinet
4. Operating Conditions - The maximum ambient operating conditions for continuous
operation of the system shall be as follows. The temperature varies between 5 and 55°C
and relative humidity is 95% non-condensing.
5. Surge Voltage - Surge withstanding capability shall be as per IEEE standard 801-2.
6. PLC Redundancy architecture - PLC shall be hot standby redundant. Primary PLC
and hot standby PLC should be located in two physically isolated two base racks (Each
PLC base rack should consist of power supply, processor, communication modules).
Redundancy architectures with primary and secondary CPU in same base rack is not
acceptable.
There will be a Hot Redundant Standby PLC with Master PLC. Both the PLCs in Hot
Synchronized mode, will be Communicating to Field I/O Devices in Redundant
Network Architecture. A Hot Standby Link will be provided in between Primary and
Standby CPUs for Continuous Mapping/Copying of Data. At every Scan cycle, the
primary CPU will Update the Standby CPU with all Data & I/O status. Both the
Synchronized CPU will execute the program logic on its own. Failure of
communication of Primary CPU with RTU / I/Os, the Standby CPU will take over and
will become the Master, provided standby CPU is in healthy condition. Transfer of
control to the standby CPU should be bump less and an alarm/indication should be

provided on SCADA HMI. Failure of Hot standby link Synchronization should not lead
to both primary & standby CPU as a Master/standalone. In such condition CPU which
was previously working as a master will continue as a master and Standby CPU should
go into wait/Stop Condition. Running of both CPU as Standalone /Master at a time
should be avoided. Reestablishment of Synch will bring the second CPU in standby
Run mode.
Changeover to secondary processor must take place in case of
a. Failure of Internal health checks
b. Removal/failure of primary processor
c. In case of observance of fault in internal / external communications and Primary
Processor is not able to link any I/O, RTU, while Standby CPU I/O
Communication is OK
d. Manual request by a user
Live replacement for the CPU should be possible. During a processor switchover, all
Inputs and outputs should remain at the last value.
7. Modular Construction - The PLC system shall be modular in construction, easily
accessible for maintenance and servicing. PLC shall be consisting with following
modular items
a. modular type power supply
b. modular type CPU
c. modular type communication modules to communicate with SCADA and
remote IO modules
d. modular type IO modules
8. Input and Output Modules - The I/O modules shall be modular plug in type and hot
swappable. All modules shall be mounted in the PLC CPU Local/Extended rack or
suppliers special back plane. CPU section shall work on its own industry standard Bus
Structure suitable for the requirement.
a. digital input Modules -- 16 / 32 channels
b. digital output Modules -- 16 / 32 channels
c. analog input Modules Single Ended isolated type -- Minimum 8 /16 channels
d. analog output Modules isolated type -- 08 /16 channels
e. CPU, communication and I/O cards etc. shall have inbuilt LED indication for
status monitoring and fault indications.
f. I/O racks/panels (RTU) and CPU Rack/Panel, shall be linked through a
redundant I/O bus. This I/O bus may be manufacturer’s proprietary or conform
to a standard Bus e.g. Profibus /Modbus etc. Complete details of this bus shall
be provided in the bid.
g. It shall be possible to replace I/O modules on line without influencing other
control functions than that covered by I/O modules being replaced.
h. All I/O modules shall have on card LED indication for status of each I/O in
addition to fault indication
i. Each rack shall have at least 15% spares for capacity expansion. Spare modules
should be specified module wise separately in Bill of Material

j. Digital output shall be short circuit proof. Outputs shall be through relay contact
with contact rating of 2A min. at 230V AC. Digital outputs should be preferably
sourcing type configuration.
k. Module fault annunciation shall be provided. The power supply to output
circuitry (loads) shall be separate and shall be protected against short circuit,
overload, etc.
9. Capacity - Discrete I/O: 2048 I/O minimum or better Analog I/O: 640 minimum or
better
10. CPU Type - 32/64-bit processor with inbuilt Co processor for Communication
11. User logic memory (including program memory and data memory) - 2 MB
min., expandable to higher size, Flash EEPROM/battery Backed RAM
12. Boolean execution speed - 0.1 milli seconds / kilo Instructions
13. Communication ports - Inbuilt or by external module
14. Communication protocol - It shall support modbus TCP/Profinet
15. Networking / communication - Ethernet - 100 Base T
16. Diagnostic indication - Like Processor failure, RUN/STOP mode status, Memory fault,
Communication fault, I/O Interface or Address fault, Power Supply fault,
Synchronization status, CPU master/Standby Mode, Failure of Hot Synchronization
Link etc. should be provided by LEDs.
17. Selection for Run/Pro /Stop - With key/micro push buttons
18. Floating point math - Shall be available
19. PID capability - Auto tuning capability
20. Processor Family - CPU shall be a processor of the latest category which support hot
standby redundancy technology. The bidder shall mention the processor family type.
5.3 Specifications of Managed Network Switches
1. Preferred Brands/Makes - Hirschmann, Schneider, Siemens
2. Country of Origin/Manufacture - Europe/USA.
3. Input Supply - 24VDC-48VDC
4. Temperature Range - 0-60°C

5. Type - Industrial grade type managed network switch
6. Ports - 10/100BASE-TX-Minimum 8 ports
7. Communication Port Protocol
a. Ethernet TCP/IP
b. HTTP/HTTPS
c. SNMP
d. SNTP
e. SSH
f. MRP, RSTP
8. Ethernet Services
a. Configuration via web server
b. VLAN
c. Multicast Filtering
d. BOOTP/DHCP client with auto configuration,
9. Diagnostics - LED, persistent logging, syslog, signal contact, device status indication
10. Function Available - Reports, Alarms, System information, Trap log
5.4 Specifications for Server Computers
1. Preferred Brands/Makes - HP, Acer, Dell
2. Country of Manufacture - China/Thaiwan/Korea
3. Form factor/height – Tower
4. Processor - Intel® Xeon® E3-1200 Series or E5 2400/2600 Series Processor 2.2 GHz
/8core/10MB or better or Equivalent AMD Opetron
5. Number of Processors – one
6. Cache (Minimum) - 10 MB
7. Memory - 4X8GB (32 GB) DDR-3/4,1333/1600 MHz, RDIMM/ECC/LRDIMM
expandable up to maximum 128 GB
8. DIMM Slots - 4/8
9. Expansion Slots - 4 PCIe slots (x16, x8, x4, x1)

10. Disk Bays - 2.5Z3.5" hot-swap 4 SAS/SATA
11. Hard Disk Capacity- 500 GB SATA/SAS, (Minimum 02 Nos. Hard disks Required
for Raid-1 Configuration)
12. Network Interface -Integrated dual Gigabit Ethernet
13. Power Supply - Two hot redundant SMPS power supply with Input voltage 230V 50
Hz AC
14. RAID Support - Hardware RAID with RAID-1 (inbuilt Raid-1 Controller with inbuilt
Memory) Equivalent to IBM - M115 Raid Controller or HP make dynamic Smart Array
controller
15. Systems Management - IMM2 or equivalent with optional upgrade key to Remote
presence
16. Operating Systems Support - Microsoft Windows Server 2016, Microsoft Windows
Server 2012 standard edition, Red Hat Enterprise Linux
17. Hardware Support - Support for Virtual O.S. (Hardware and software support to
create a virtual machine
18. Installation CDs/ Driver CDs - Installation CDs of Windows 2012/2008 Standard
edition and any other software installed and Driver CDs etc. shall be supplied along
with the Servers
5.5 PRINTER
1. Preferred Brands/Makes – Lexmark, HP, Cannon
2. Country of Manufacture - China/Thaiwan/Korea
3. Print out Speed - 20 ppm or better
4. Print Resolution - 1200x1200dpi Resolution or better
5. Paper Size - A4/A3
6. Print Technology - Laser jet colour
7. Duplex Printing -Automatic
8. Display - LCD or LED
9. Printer Memory - 128 MB or better

10. Scan Resolution - 1200x1200 dpi Resolution or better
11. Scan File format - JPEG, TIF, Pdf, GIF, BMP
12. Copy Resolution - 1200x1200 dpi Resolution or better
13. Scanning Speed - Approx. 16 pages per minute or better
14. Scanning Report - Activity Report, TX Report, RX Report, Lost Report
15. PC Interface - USB Hi Speed
16. Standards Connectivity - Hi-Speed USB port, 1000/2000 Mbps Ethernet network port
17. Power Requirement - 220-240 VAC 50Hz
18. Recommended monthly page volume - 2000 or better
19. Operating Environment - Temperature 0 - 50 °C Humidity 10% - 80%
5.6 GSM
1. Approved Brands/Makes - Can be defined by contractor
3. Input Voltage Range - 9 - 30V DC
4. Power Consumption - 7W or better
5. Approvals - Sri Lankan Telecommunication regulatory (TRCSL) Approval should be
available to use within Sri lanka
6. General Requirements
a. Power over Ethernet
b. Power status LED
c. Connection status LED
d. Signal strength LEDs
e. Two sim cards slots for dual sim support
f. SMS sending capability
7. Ports and Antennas
a. one WAN ports, LAN ports
b. RS 485 or RS232 ports
c. USB Port (optional)

d. 2 Nos of Wifi Antennas (optional)
e. 2 Nos of GSM Antennas
8. Mobile technology - 4G (LTE) – Cat 4 DL up to 150 Mbps, UL up to 50 Mbps; DC-
HSPA+; UMTS; TD-SCDMA; EDGE; GPRS
9. Operating Temperature - -40°C to 75 °C
5.7 Specifications for UPS
1. Preferred Brands/Makes – Socomec/ Emmerson
2. Country of Manufacture – Europe
3. Input Supply - 175 ~ 270 VAC 50/60 10% Hz
4. Input side Power factor - 0.96 or better
5. Output - 230 ±2% VAC 50Hz Sine wave
6. Power Rating
a. PLC station- 3KVA
b. SCADA room - 6KVA
7. Technology - Online double conversion
8. Number of Sockets - 4 Minimum
9. Indications - Overload, battery low, Battery in use... etc.
10. Battery Backup - Backup time - 01-hour full load with Replaceable battery system or
better
11. Efficiency - 92% or better
12. Overload capability - up to 150% for 10 seconds
13. Protection - Overload, Over/Under Voltage, Battery Low, Replace Battery
14. Additional Features - The battery charger shall maintain the batteries at full charge.
Include communication ports which provide following parameters Low Battery, On
Bypass, Input Fail, UPS On (At least one port shall be based on RS232 protocol &
Operating parameters, including input and output
15. Communication Ports - data and UPS status, shall be available for remote monitoring
via the RS-232 port) LCD Display

16. Accessories
a. Power cords
b. User Manual

6 Instrumentation
6.1 Specification for Ultrasound Level Sensor
1. Preferred Brand/Make - E&H/ABB/Siemens
3. Application – Waste Water Treatment plant
4. Area Classification - As applicable according to installation location
5. Operating principle - Time of flight method
6. Measuring range - 10m (as applicable according to the location)
7. Accuracy - plus/minus 6mm
8. Protection class - IP 67/68
9. Working pressure and temperature - -0.2bar to 2bar and -40°C to 80°C
10. Transmitter output - 4-20mA, HART
11. Power Supply - 24VDC, two wire
12. Display - Sperate LCD display
6.2 Specification for Flow Meter
1. Preferred Brand/Make - E&H/ABB/Siemens
3. Application – Waste Water Treatment plant
4. Area Classification - As applicable according to installation location
5. Sensor
a. Operating principle - Faraday law of Electromagnetic induction
b. Coil Housing - Epoxy coated Die Cast Aluminum/ Painted Sheet Steel/ SS304
c. Lining - Hard Rubber/ Polyurethane/Ebonite/Elastomer
d. Electrode Material - SS316
e. Grounding - With inbuilt Grounding electrode. / Grounding Ring. Grounding
electrode/ Grounding Ring MOC should be the same as that of measuring
electrode
f. Empty pie detection – Required
g. Flange MOC/Rating - CS/ ASME Class 150
h. Sensor Memory - Shall possess digital memory for all calibration &
Configuration data
i. Accuracy - 0.5% of the flow rate
j. Protection class - IP 68 for Remote models & IP67 for Integral Models
k. Working pressure and temperature - Max 16 bar and 80C
l. Sensor Size - Vendor to specify as per Flow & Line Size data
6. Transmitter
a. Display - Fully Configurable Backlit graphical LCD with Capacitive Touch
keys
b. Output –
i. Analogue 4-20mA
ii. HART
iii. Digital Pulse/ Frequency & Alarm Output
c. Totalizer - 8-Digit Inbuilt Totalizer for Forward, Reverse & Net Total
d. Transmitter Housing - Die Cast Aluminum
e. Protection class - IP 67

f. Power Supply - 85-265VAC/24 VDC Universal power Supply
g. Diagnostics - Grounding Check, Empty Pipe detection Transmitter
temperature monitoring etc. Complying to NAMUR NE107
h. Type - Remote type with cable of 10mtr for Installing the transmitter at a place
easily accessible to operator
7. Verification - All the flow meters should have capability of IN-Site verification of
performance. The tools/ software required for online verification should be part of
supply of flow meters. While Performing the verification meter should not be removed
from process & software should generate detailed reports to demonstrate the health of
meter

Specification for electrical automation and instrumentation 02

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