1. Safety Agencies
Safety Agencies

2. OBJECTIVES
• What are Safety Agencies?
• What is Underwriters Laboratory and what
y
is their purpose?
• How does UL work?
How does UL work?
• What is the role of Renco Electronics
pertaining to UL?
pertaining to UL?

3. Safety Agencies
Safety Agencies
• UL‐Underwriters Laboratories
• CSA ‐ Canadian Safety Agency
• TUV ‐ German Agency
• VDE E
VDE ‐ European Safety Agency
S f t A
p
• CE ‐ European Union

4. What Is Underwriters Laboratory and What Is
Their Purpose?
• Began in 1894 in Delaware
• Began as Not for profit laboratory
Began as Not for profit laboratory
• Examination and testing of devices, systems, and
materials to determine their relationship to hazards
of life and property
Translation: Set standards that try to protect us
from Electrocution and Fire hazards
from Electrocution and Fire hazards

5. Electrocution Hazards
• SELV circuits 72 Vdc max
• Galvanic Isolation
• Creepage and Clearance

6. Fire Hazards
• UL 94 Standard
• Spread or extinguish the flame
Spread or extinguish the flame
• Ignition resistance of a plastic

7. How Does UL Work?
k
• A material, product, or system is submitted for
testing to meet some standard.
• Typically submitted by manufacturers, developers or
yp y y , p
authorized agents.
• A detailed material list, samples, construction
breakdown, and intended use are required.
breakdown and intended use are required
• Process can take 4 weeks to 16 weeks and cost
several thousand dollars

8. UL Certification Levels
• UL Listed and follow‐up service
• UL Recognized
• UL Classified

9. The Role of Renco Pertaining to UL
h l f
and Our Customers
• Design and manufacture using materials that
are UL recognized
are UL recognized
• Design and manufacture to meet a specific UL
system listing.
system listing.
• Submitting magnetics to UL on behalf of
custo e
customer

10. Design and Manufacture Using
f
Materials Which Are UL Recognized
Cosmo
C Rynite
R it FR530 E69578
DuPont TFE Teflon Lead Wire E54681
Furukawa TEX E or TEX F Triple Insulated Wire E206440
Permacel Glass Cloth Tape E20392

11. Design and Manufacture to Meet a
Design and Manufacture to Meet a
Specific UL Insulation System
• This means all the materials used as
insulation in the construction of the product
are on a list of pre approved materials that
are on a list of pre‐approved materials that
meet the criteria of a particular temperature
class individually or with any other material
listed in the system
listed in the system
• Renco owns and maintains 5 UL insulation
systems
• Renco has adopted 9 other UL insulation
Renco has adopted 9 other UL insulation
systems

12. Submitting Magnetics to UL
S b itti M ti t UL
• Renco can submit the magnetics for UL testing
• Renco can assist the customer who is submitting their
g
end product for UL testing
• Renco can provide varnished and unvarnished samples
along with UL gathering sheets containing d t il d
l ith th i h t t i i detailed
information such as: material composition and construction
details

13. Linear Transformer Design
Li T f D i
• Design is driven by the standards required
g y q
• UL 5085 – 1 (Class 1)
– Galvanic Isolation
– Materials must meet minimum UL94 rating
• UL 5085 – 2 (Class II)
– Typically uses 2 ‐ section bobbin
T i ll 2 ti b bbi
– Thermally fused or inherently protected
– Must be encased
Must be encased
– Increased Galvanic isolation
– Materials must meet minimum UL94 rating

14. Switch Mode Transformer Design
• Design is driven by the standards
Design is driven by the standards
required
• Margin tape
Margin tape
• Triple insulated wire
– Rubadue
– Furukawa Tex E
Courtesy of Furukawa

15. Example
• Transformer 120V, 60Hz with 13V output;
requires UL listing, 1300C, Class II
• Design and manufacture using existing UL
insulation system and UL recognized materials
• Provide UL gathering sheets and varnished and
Provide UL gathering sheets and varnished and
unvarnished samples
• Customer Submits complete power supply to
UL for testing
f i
• Fastest turn around and lowest cost

16. Questions for the Customer
Q i f h C
• Who will submit for testing?
Who will submit for testing?
• Which Agencies?
• Which Standards?
hi h S d d ?
• Time Line?
• End Application?

17. Where Are Those UL Files on Renco’s
Where Are Those UL Files on Renco’s
Website?

18. Go to our website:
www.rencousa.com
and click on the
and click on the
UL File Listings

19. Click on the yellow: UL Insulation & Material Listings for Standard Parts

20. You are then presented with a box whereby you may select the part you wish to view.

21. Click on the right‐hand arrow to display the parts and then click on the part you want to see.

22. The information for the part you chose is then displayed.
The information for the part you chose is then displayed

23. Call our Friendly Engineering Staff!
C ll F i dl E i i St ff!
Custom M
C Magnetics D i
i Designs
Standard and Custom Samples at NO Charge
Problem Solving and Assistance with Agency Approval
1-800-645-5828 engineering@rencousa.com