EE lighting and mechanical system standards:
Every distribution transformer being manufactured, commercially purchased or sold in India shall - (i) meet the compliance requirements of the type test parameters as follows: (ii) a.ยท Measurement of winding resistance as per IS 2026 (part 1):1977. b. Measurement of voltage ratio and check of voltage vector relationship as C. per IS 2026 (part 1):1977. Measurement of impedance voltage/short circuit impedance and load loss as per IS 2026 (part 1):1977. d. Measurement of no-load loss and current as per IS 2026 (part 1):1977. Measurement of insulation resistance as per IS 2026 (part I): 1977. Induced over-voltage withstand test as...per IS 2026 (part 3):1981. Separate-source voltage withstand test as per IS 2026 (part 3): 1981. Lightning impulse test as per IS 2026 (part 3): 1981. Temperature-rise test as per IS 2026 (part 2):1977. Short-circuit test as per IS 2026 (part 1):1977. Air pressure test as per IS 1180 (part 1 ): 1989. Permissible flux density and over fluxing as per IS 1180 (part 1): 1989 either carry BIS certification mark or the manufacturer should be certified against IS/ISO 9000 or above.
EE labeling:
Star rating or star level plan.- (1) The energy label to be affixed to distribution transformer shall display a maximum of five stars with an interval of one star. The distribution transformers shall be rated from star one to star five based on their relative energy efficiencies or loss standards which is the total losses al 50% and 100% loading of the distribution transformer. The highest loss segment is defined as star ~ne and lowest loss segment is defined as stadive. (2)The star level of the distribution transformer shall be. determined by the total losses at 50% and 100% loading which shall not exceed the maximum values given below [...].