Section 69-09-02-24 - Instrument transformers1. Instrument transformers used in conjunction with metering equipment to measure electric energy furnished to customers shall be in proper mechanical condition and shall have electrical insulation satisfactory for the service on which used.2. The accuracy of current transformers shall comply with the requirements of American standards association accuracy class 1.2.3. The accuracy of potential transformers shall comply with the requirements of American standards association accuracy class 0.6.4. Instrument transformers for special installations may be tested in a laboratory before installation provided the last records are kept to aid in adjusting the meter used in conjunction with the transformer.5. Current transformers shall be tested for short-circuited primary or secondary turns, high resistance connections, and proper wire connections whenever the metering installation is tested for accuracy.6. The nameplate voltage ratio of potential transformers shall be checked whenever the metering installation is tested for accuracy.N.D. Admin Code 69-09-02-24
General Authority: NDCC 49-02-11
Law Implemented: NDCC 49-02-11