Section 11(b) in The Orissa State Electricity Board (General Conditions of Supply) Regulations, 1995
(b)High tension consumer - High tension consumer (i) requiring a supply of 1000 KW and above shall instal at his cost suitable circuit breakers of approved make with sufficient rupturing capacity as specified by the Board on the H. T. incoming side of his load, fitted with automatic overload protective devices, so adjusted that the circuit breakers supplied by the consumer operate before terminal circuit breaker/isolating apparatus of the Board activate ; (ii) requiring a supply up to 1000 KW shall provide on the H. T. incoming side of his load, a gang operated triple pole isolating switch of approved make with high tension fuses of fast blowing characteristics or circuit breaker of adequate rupturing capacity which should be so adjusted that they blow off before the overload protective devices in the Board's terminal circuit breaker/isolating apparatus operate.
