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
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
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?
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
