Okla. Admin. Code § 165:35-15-14

Current through Vol. 42, No. 7, December 16, 2024

Section 165:35-15-14 - Place and methods for testing metering equipment

(a)Testing in place. Tests on watt-hour and demand meters in service may be made either on the consumer's premises or in an approved meter testing facility.

(b)Instrument transformers.

(1)Preinstallation tests. Prior to installation, all new instrument transformers shall be tested for voltage withstand, ratio correction factor, and phase angle in an approved laboratory, meter shop, or by the manufacturer.

(2)Transformers removed from service. All instrument transformers removed from service, unless damaged, shall be tested for ratio correction factor and phase angle prior to reinstallation.

(3)In-service tests. When metering installations are tested on periodic schedules, the instrument transformers associated with the installation shall be inspected for correctness of connections and evidence of any damage. Current transformers shall be tested with a suitable variable burden device to determine if the windings of the secondary circuit have developed an open circuit, short circuit or unwanted grounds. When the primary voltage is known, potential transformers may be tested by measuring the secondary voltage to reveal defects in the transformers or secondary circuit which affects its accuracy.

Okla. Admin. Code § 165:35-15-14