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Nuvotem Talema have several "Family" approval files with Underwriters Laboratories.
Unlike some of our competitors, Nuvotem Talema have invested the time and effort to enable automatic
UL recognition of new custom transformers, without having to send each transformer to a UL test
facility for their approval.
It is a mark of UL's confidence in our research and development abilities that we have an agreed
file of design criteria which must be met, to ensure approval to UL506 or UL544
These "Families" may be divided as follows:
E215495 : UL 506 - Speciality Transformers
File E215495 is our most requested UL approval file for Power Transformers ;
- Maximum total power rating: 3000VA
E218027 : UL 544 - Medical and Dental Equipment
File E218027 covers transformers for Medical and dental equipment,
which require more stringent insulation and overload protection levels.
- Usually requires an Earthed Screen between windings.
- Usually requires a thermal fuse for overload protection.
E218027 : UL 1950 - Information technology Equipment, including Electrical Business equipment
File E218027 Volume 2 covers the 70000K series of PCB mounting transformers
which were evaluated to the construction requirements of UL1950 Second Edition.
E218027 : UL 6500 - Audio/Video and musical apparatus fro household, commercial and similar general use
File E218027 Volume 2 covers the 70000K series of PCB mounting transformers
which were evaluated to the construction requirements of UL6500
E217412 : Insulation systems with Temperature Classes B, B1 and F
File E217412 : These higher temperature classes cover both UL506 and UL544
- Class B - 130 degrees maximum temperature, Using all materials minimum Class B
- Class B1 - 130 degrees maximum temperature, Using specific materials from specific manufacturers
- Class F - 155 degrees maximum temperature
Other UL Approvals
As well as our Family Approvals, Nuvotem Talema also have numerous individual products approved
to various UL standards, such as UL1411, UL1950, UL2601, etc.
Email Us for more UL Approvals information
UL Factory Inspections
To ensure our conformance with our UL files, the UL authorities conduct random factory inspections
several times per year, and verify that our internal processes and procedures are being adhered to,
and that the products we are marking as being "UL Recognised" are indeed in conformance with the
agreed UL files.
We are also listed as factory locations for several customers' own UL approval files, and are subject
to audits on these files also.
Canadian Approvals
Nuvotem Talema also offer C-UL approvals to Canadian Standard C22.2 No. 66-1988 "Specialty Transformers" for 60Hz only power transformers.
Email Us for more C-UL information
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