UL Online Certifications Directory
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[Transformers] Instrument Transformers Rated 115 kV and Above
See General Information for Transformers
USE
This category covers single-phase gas-filled or oil-immersed instrument transformers with a nominal system voltage of 115 kV and above, with a capacitive insulation system for line to ground connection. They may be used for indoor or outdoor applications.
Instrument transformers may be provided with Class I or Class II internal arc protection.
PRODUCT MARKINGS
Instrument transformers are marked with:
- Manufacturer's name or trademark
- Serial number or unique identifier
- Rated primary and secondary current
- Nominal system voltage (NSV) or maximum system voltage (MSV)
- Basic impulse level (BIL)
- Rated frequency
- Continuous thermal current rating factor (RF)
- Accuracy rating (if required):
- Metering accuracy class as specified standard burdens; as a minimum, the burdens at which the transformer is rated 0.3 accuracy class
- Relaying accuracy rating on transformers intended primarily for relaying applications
PRODUCT IDENTITY
One of the following product identities appears on the product:
Current Transformer Rated ____
Voltage Transformer Rated ____
The word "Transformer
" may be abbreviated "Xfmr,
" "Xfrmr
" or "Xformer.
"
ADDITIONAL INFORMATION
For additional information, see Electrical Equipment for Use in Ordinary Locations (AALZ).
REQUIREMENTS
The basic standards used to investigate products in this category are
UL MARK
The Certification Mark of UL on the product is the only method provided by UL to identify products manufactured under its Certification and Follow-Up Service. The Certification Mark for these products includes the UL symbol, the words "CERTIFIED
" and "SAFETY,
" the geographic identifier(s), and a file number.
Additional Certification Markings
Products covered under this category are additionally marked with the following information:
* * * * * * * * * * * * * * * * * * * * * * * * *
UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. UL shall not incur any obligation or liability for any loss, expense or damages, including incidental or consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Guide Information.
| Last Updated on 2016-08-09 |
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The appearance of a company's name or product in this database does not in itself assure that products so identified have been manufactured under UL's Follow-Up Service. Only those products bearing the UL Mark should be considered to be Certified and covered under UL's Follow-Up Service. Always look for the Mark on the product.
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