2. Rapidly Ana
Voltage Monitoring Inputs (V1 & V2)
One analog voltage input channel (designated as V1) is dedicated to monitoring a
circuit-breaker dc power supply or a coil voltage (0 to 255 volts, dc or peak ac).
A second voltage input channel (designated as V2) is dedicated to detecting volt-
age on/off status (presence or absence) of an A/B switch (an input range of 30-
300 V dc or peak ac).
Trip/Close Current Monitoring
A built-in Hall-effect current sensor records the Trip/Close current level and duration.
The Trip/Close coil current waveform (effectively, a performance “fingerprint” or cur-
rent profile) can be used as a diagnostic tool for analysis of a breaker’s performance.
Breaker Stroke and Velocity
CT-8000
Three digital travel transducer channels enable the CT-8000 to measure stroke, over-
travel, and bounce-back. Unlike other types of travel transducers, the digital transduc-
er requires no calibration or setup. A contact-velocity calculation is based on a contact’s
travel distance over a period of time, which is defined by the breaker manufacturer’s
TM
specifications. A special feature lets users “slow-close” a breaker and produce a test-
result report.
Dynamic Contact Resistance
One channel of Dynamic Contact Resistance test is also available. A built-in 200-ampere
power supply provides the test current for this application. Resistance measurement
The Vanguard Instrument Company, Inc. Model CT-8000™ EHV Circuit-Breaker
ranges from 1 micro-ohm to 1999 micro-ohms. The dynamic resistance test allows the
Analyzer is a fifth-generation design configuration. The Model CT-8000 is a stand-
user to monitor contact resistance during circuit breaker operation. This feature allows
alone, microcomputer-controlled Circuit-Breaker Analyzer that is inexpensive and
the user to detect circuit-breaker contact erosion, or contact problems that can not be
easy to use. It operates in either of two modes: As a traditional Time-vs-Travel ana-
detected in static resistance test. The CT-8000 can be used as a 200-ampere, micro-ohm
lyzer or as a Quick-Shot (on-line timing). The CT-8000 is available with either 3
meter to check circuit-breaker contact resistance, bus connection, or other applications
dry contacts (CT-8000-3) or 6 dry contacts (CT-8000-6) configurations. Both
where a low-resistance measurement is required.
models are supplied with 3 digital travel transducer input channels.
Quick Shot Mode Resistor Type Transducer Input Channel
In the Quick-Shot mode, the CT-8000 captures the breaker’s trip or close time, the One resistor type input channel is also available with the CT-8000. This input channel
Trip/close-coil current “fingerprint,” and the battery-supply voltage (while the allows the CT-8000 to interface directly with resistive type transducers. The transducer
breaker is still on-line and in service). Trip/close time is derived from the time of resistance ranges from 200 ohm to 10K Ohm.
trip, or at the close-coil initiation, to the breaker’s bushing current-break or -make Timing Shot Storage Capabilities
(detected by an ac clamp-on current-probe). The CT-8000 uses Flash Electrically Erasable PROMs (EEPROMs) to store timing data.
With a simple connection, the Quick-Shot mode detects a breaker’s operating con- Unlike other storage media, EEPROMs are immune to shock, temperature, and humid-
ditions with little or no down (out of service) time. The Quick-Shot mode captures ity. Stored timing shots can be recalled to re-analyze test data, print copies, or transfer
the First-Trip Operation time of the breaker. When a breaker has been in service data to an IBM-PC database for record keeping. Up to 150 timing shots can be stored
for a long time (such as sitting in a closed position), the time of the breaker's first in the EEPROMs.
trip may be slow (e.g., due to a "sticky" mechanism). Traditional breaker timing Circuit-Breaker Test Plan
may not detect this condition, since several operations may have occurred before Up to 99 breaker test plans can be stored in the CT-8000. Test plans comprise all
the first timing test is conducted. breaker specifications (stroke, velocity, contact time). By recalling a test plan, the
Conventional Time-versus-Travel Analyses Mode user can instantly test a breaker and view a pass/fail report (made by comparing
In the Time-Travel mode, the CT-8000 analyzes circuit-breaker performance, performance with specifications in the stored test plan). A user doesn’t need to
namely: contact time, stroke, velocity, over-travel, and wipe. A 200-ampere, built- look-up a breaker’s specifications to compare with test results to determine if the
in, power supply allows the CT-8000 to perform contact dynamic-resistance tests. breaker passed performance tests or not. Test plans can be downloaded to the CT-
Contact-motion analyses include: Open, Close, Open-Close, Close-Open, and Open- 8000 via an RS-232C serial port or via a USB port.
Close-Open switching sequences. The timing window is selectable: 1-second, 10- Breaker Initiate Features
second, or 20-second periods. The 10-second and 20-second windows allow tim-
A built-in, solid-state, initiate device allows users to remotely operate the breaker
ing of long-duration events (e.g., circuit-switching contacts).
Circuit Breaker Time-Travel Analy
from the CT-8000. The operational mode includes: Open, Close, Open-Close,
Breaker Contact Timing Inputs Close-Open, and Open-Close-Open. Multiple operation (e.g., Open-Close, Open-
Contact timing uses dry-contact input channels. Each contact-input channel can detect Close-Open) can be initiated by using a programmable delay time or by sensing the
main contact and insertion-resistor contact times (displayed in milliseconds & cycles). breaker’s contact condition.
2

3. alyze
Computer Interface
OCB, Vacuum, and SF6 Circuit
Breakers with Vanguard’s CT-8000
User Interface
One RS-232C Interface port and one USB port allows the CT-8000 to be controlled An alpha-numeric keypad allows users to enter breaker ID and control functions.
from an IBM-PC-compatible computer. From the PC, circuit breakers can be timed A 4-line by 20-character LCD readout displays user messages. The LCD is back
and users can retrieve timing shots that have been saved in the CT-8000 flash EEP- lighted so messages can be viewed in low light levels. Display contrast is controlled
ROM. Windows® XP-based Breaker-Analysis software lets users retrieve test-shot via the CT-8000 keypad.
data stored in the computer’s hard-drive disk, re-analyze the stored data, and gen-
erate reports in the office on an IBM-compatible computer. This PC software also
Built-in Thermal Printer
allows users generate customized test-result reports and to create a circuit-breaker A built-in thermal printer prints the breaker contact analysis results in both tab-
database library. Additionally, users can create circuit-breaker test plans to be ular and graphic formats on 4.5-inch-wide thermal paper.
downloaded to the CT-8000.
Voltage Input Linear
Channels
Transducer
Current Lead
Contact Timing Connector
Channels
Sense Lead
Travel Transducer Connector
Connectors
Power Receptacle
USB Connector Module
Resistor Transducer
RS-232C Input
Connector Breaker Initiate
4x20 Backlit Output
LCD Display
4.5-inch
Thermal Printer
Rugged 16-Key
Breaker Initiate
Membrane Keyboard
Arm Switch
ABB
AHMA-8
yzer
Mechanism
Transducer
Vanguard Instruments Company
Reliability Through Instrumentation
RV April 06

4. Microcomputer Accuracy in an Inexp
Graphic and
Tabulated Printouts
M Built-in Thermal Printer Output
EEPROM Stored Test Parameters
M
M Trip Time Using Quickshot Mode
CT-8000
Trip Time Using Bushing CT
Trip Coil Current Profile
PARTS ORDERING INFORMATION for the CT-8000 CIRCUIT BREAKER TIMER:
All of the below listed replacement parts may be ordered from Vanguard Instruments Company, Inc.
PC software and cables for CT-8000, 3 contact channels Part No: CT-8000-3
PC software and cables for CT-8000, 6 contact channels Part No: CT-8000-6
Carrying case for the CT-8000 Part No: CT-8000-CASE
Printer paper, thermally sensitive Part No: Paper-TP4
CT-8000 TRAVEL TRANSDUCERS:
10 inch linear transducer: Part No: LT-10
25 inch linear transducer: Part No: LT-25
30 inch linear transducer: Part No: LT-30
Rotary transducer: Part No: RT
15 inch universal transducer: Part No: UT-15
ABB AHMA-8 Transducer Part No: ST-AHMA-8
ABB AHMB-8 Transducer Part No: ST-AHMB-8
Circuit Breaker Time-Travel Analy
Westinghouse SF/SFA transducer: Part No: ST-SF/SFA
Linear transducer case Part No: LT-CASE

5. pensive Digital Circuit Breaker Tester
• On-Line Timing/Capture First Trip Time
FEATURES
• Static & Dynamic Resistance Tests
• Full Breaker Tabulated & Graphic Data Printout
• Output Test Results to Built-in Thermal Printer
• Digital Travel Transducer; No Setup or Calibration Required
• Supports Resistance Type Transducers
• Detect Main Contact and Insertion Resistor Contact on the Same Input Channel
• On-Board Flash EEPROM Shot Storage/Test Plan Storage
• Computer Interface (RS-232C or USB)
SPECIFICATIONS
TYPE Special purpose test equipment, portable circuit breaker analyzer
PHYSICAL SPECIFICATIONS 16” W by 11” H by 14” D (40.6 cm x 29.9 cm x 35.6 cm); Weight; 25 lbs (11.3 kg)
INPUT POWER 90-130 Vac or 200-240 Vac (selectable), 50/60Hz
DRY-CONTACT INPUT 3 or 6 dry-input channels; Each channel detects Main and Insertion-Resistor Contacts
TIMING WINDOWS Selectable: 1-second, 10-seconds or 20-seconds
TIMING RESOLUTION 50 microseconds at 1-second duration; 0.5 milliseconds at 10-second duration;
1.00 milliseconds at 20-second duration
TIMING ACCURACY 0.05% of reading, ±50 microseconds at 1-second duration
CONTACT DETECTION RANGE Closed: <20 ohms, Open:> 5,000 ohms
RESISTOR DETECTION RANGE 50 – 5,000 Ohms
CT CURRENT SENSOR One, None Contacting, 0-150 Amp
EXTERNAL TRIGGER INPUT Open/Close: 30-300V dc or peak ac
VOLTAGE SENSING INPUT RANGE V1: analog input; 0–255 V, dc or peak ac, Sensitivity: ± 1 V; V2: voltage detector (present/absent)
input; 30-300V, dc or peak ac
BREAKER OPERATION Open, Close, Open-Close, Close-Open, Open-Close-Open
BREAKER INITIATE CAPACITY 25 A/250 V ac/dc max (100A Inrush)
INITIATE CURRENT READING RANGE One, Non-contact, Hall-Effect sensor, 0-20-amp range, dc to 5 kHz
TRAVEL TRANSDUCER INPUT 3 digital travel transducer channels; Linear range, 0.0-30.0 in (±0.01 in); Rotary range 0-360° (±0.36°)
CONTACT TRAVEL POINT DIFFERENCE Measures “Slow-Close” contact-point distances (hard copy printout)
DYNAMIC/STATIC RESISTANCE RANGE 0.1 to 1,999 micro-ohm, Accuracy: ±2% of reading, ±5 micro-ohm
RESISTANCE TEST CURRENT 200 Amperes Typical
RESISTOR TYPE TRANSUCER CHANNEL 200 Ohm to 10 K Ohm
DISPLAY 4 lines by 20 character back-lit LCD, sunlight viewable
PRINTOUT Both graphic contact-travel waveforms & tabulated results are printed on a 4.5-inch thermal printer
TEST RECORD STORAGE Store up to 150 timing records and 99 test plans
COMPUTE INTERFACE RS-232C port, USB Port
PC SOFTWARE Furnished Circuit breaker analysis software running under Windows XP; features graphic display,
numerical reports, and data base utility for use at shop or office.
SAFETY Designed to meet UL 6101A-1 Certification and CAN/CSA C22.2 No 1010.1-92
ENVIRONMENT Operating: -10°C to 50°C (+15°F to +122°F); Storage: -30°C to70°C (-22°F to +158°F)
OPTIONS Hard case for shipping; available for both Travel Transducers and CT-8000
yzer
WARRANTY One-year warranty on parts and labor
Note: The above specifications are valid at nominal voltage and ambient temperature of +25°C (+77°F). Specifications are subject to change without notice.
Vanguard Instruments Company
Reliability Through Instrumentation
Reliability Through Instrumentation
RV April 06

6. Instruments Designed and Developed by the Hearts
and Minds of Utility Electricians Around the World
You’ve seen a lot of utility test equipment in your time. You work with it routinely.
Your facility relies upon it to ensure peak performance. Often times, your maintenance
tasks are tedious, time-consuming and repetitive. But timely and accurate information
is the currency of maintaining maximum uptime and minimal repair, thus testing must
be done. Your instruments must be up to the task.
Vanguard Instruments is familiar with your problems and shares in your desire to
make transformer and breaker testing fast, reliable, and simple. These principles
are the basis for every Vanguard design. They also form the premise for our ongoing
research and development as well as every innovative feature we introduce.
How do we know what you’re looking for in utility test equipment? We’re there in
the trenches with you! Our Chief Engineer is frequently on-site at power utility sub-
stations around the country and all over the world; working, listening and talking
with electricians and technicians just like you. More than that, you’ve shown us the
real nitty-gritty of testing. We’ve taken that to heart and then back to the lab to solve
your problems. The results of your recommendations are embodied in utility test
equipment that is easy to use, lightweight, rugged and dependable. The EZCT-2000TM,
along with Vanguard’s full line of test equipment, leads the industry in accuracy and
automatically performs a range of tasks and calculations that were once the bane of
every utility electrician.
We hope that you will take a few moments to consider the technological innovations
that are engineered into every Vanguard test instrument. Equally important, we want to
know that our past efforts make a present difference in your testing routines and on-line
uptime. We’re not done though. You can be confident we’re looking for new ways to
improve the results of your testing regimen. Thanks for choosing Vanguard Instruments.
Vanguard Instruments Company, Inc.
1520 S Hellman Ave. • Ontario, Calilfornia 91761 USA
Phone 909-923-9390 • Fax 909-923-9391
Website: www.vanguard-instruments.com