JSERC Regulations 4

Section 4 · System of Supply

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- 4.1 The Distribution Licensee shall supply power within the frequency band specified in the Central Electricity Regulatory Commission (Indian Electricity Grid Code) Regulations, 2010 as amended from time to time. At the point of commencement of supply, except with the written consent of the consumer or with the previous sanction of the Commission, a supplier shall not permit the voltage to vary from the declared voltage more than the limit specified in the Central Electricity Authority (Grid Standards) Regulations, 2010.

4.2

Electricity shall be supplied on AC system with a frequency of 50 cycles per second on the following voltage levels and number of phases:

(a)

Low Tension
(i)Single Phase: 230 volts between phases and neutral
(ii)Three Phase: 400 volts between phases

(b)

High Tension (H.T) - Three Phase: 6.6 kV, 11 kV, 22 kV or 33 kV between phases.

(c)

Extra High Tension (EHT) - Three Phase: 66 kV, 110 kV, 132 kV, 220 kV or 400 kV between phases.

(d)

For Railway Traction, two phase HT supply with 25 kV between phases and EHT supply with 132 kV supply between phases may be given.
4.3Supply shall generally be given at the following voltages on the basis of contracted load:
Category System of Supply
Low Tension
All installations (other than irrigation pumpingand agricultural services) with a contracted load upto 5 kW Single phase at 230 V
Irrigation pumping and agricultural services andall installations with a contracted load of more than 5 kW and upto 85 kW/100 kVA 3 Phase, 4 wire at 400 V
High Tension
Contracted load exceeding 100 kVA* and up to1500 kVA 3 Phase at 6.6 kV / 11 kV / 22 kV
Contracted load exceeding 1500 kVA** and up to10000 kVA 3 Phase at 22 kV/ 33 kV
Contracted load exceeding 10000 kVA and up to20000 kVA 3 Phase at 33 kV
Extra High Tension
Contracted load exceeding 20000 kVA 3 Phase at 66 kV/ 110 kV/ 132 kV/ 220 kV
*Assuming a power factor of 0.85**Assuming a power factor of 0.85
4.4Load for energy intensive consumers such as arc/induction furnaces, rolling mills, re-rolling mills and mini steel plants shall be released only through an independent feeder wherever feasible and all necessary charges shall be paid by the consumer. Supply may be given at independent feeder in other cases at the request of the consumer if he is willing to bear all applicable charges.
4.5Consumers availing supply at lower voltage than above classification will be required to pay Low Voltage Supply Surcharge as prescribed the Commission from time to time. Similarly consumers availing supply at voltage higher than above classification will get High Voltage Supply Rebate as prescribed by the Commission from time to time.
4.6All 3-phase HT and EHT consumers taking three-phase supply shall balance their load in such a way that the difference in loading between each phase does not exceed 5% of the average loading between the phases.
4.7The Distribution Licensee may, depending upon the technical conditions of the distribution system, give supply at a voltage and phase other than the classification of supply in clauses Error! Reference source not found. and Error! Reference source not found. of these Regulations, subject to the Commission's approval.

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