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CHAPTER – 4  VOLTAGE, FREQUENCY AND POWER FACTOR OF ELECTRICITY

CHAPTER – 4
VOLTAGE, FREQUENCY AND POWER FACTOR OF ELECTRICITY

40. Supply Voltage:

– (1) The standard of supply voltage shall have to be  maintained as follows:-
(a) 230 volt in A.C. single phase and 400 volt in three   phases for general consumers.
(b) For those who want a supply of electricity from four  wires, the electric service shall be made a vailable in
230/400 volt from A.C. three phases.
(2) The fluctuation shall not be allowed for more than five percent  in standard volt as mentioned in Clauses (a) and (b) of sub-rule (1)

.
41. High Voltage Distribution System:-

(1) The standard of the voltage in the  high voltage distribution system, the standard of distribution system shall be
maintained as follows:-
(a) 3,300 volt,
(b) 6,600 volt,
(c) 11,000 volt,
(d) 22,000 volt,
(e) 33,000 volt,
(2) The fluctuation shall not be allowed for more than five percent in
standard volt as mentioned in Clauses (a) to (e) of sub-rule (1).

42. High Voltage Transmission System:-

(1) The standard of the voltage in the  high voltage transmission system shall be transmitted as follows:-
(a) 33,000 volt,
(b) 66,000 volt,
(c) 1,32,000 volt,
(d) 2,20,000 volt,
(e) 4,00,000 volt,
(2) The fluctuation shall not be allowed for more than ten percent in
standard volt mentioned in Clause (a) to (e) of sub-rule (1).
43. Frequency:- (1) The standard of the frequency shall be maintained as 50
cycles per second (50 hertz).
(2) The fluctuation shall not be allowed more than 2.5 percent in the
frequency standard as mentioned in sub-rule (1).

44. Power Factor:-

The standard of the power factor shall have to be
maintained as follows:-

(a) The level of power factor of the electricity supplied to the consumer  shall not be allowed not less than 0.8 lyayring and not more than one  unit leadings.
(b) The condensers or any other appropriate equipment shall be managed  for maintaining the standard of power factor in electric transmission and  distribution system pursuant to clause (a).
(c) The licensee may cause the consumer to install appropriate condenser if  the consumer’s electricity related power factor is not at the level  mentioned in Clause (a).

45. Unit of Measurement of Different Standard of Electricity:-

Following  unit of measurement shall be maintained for measuring different standard of
electricity:-
(a) Milliampere, ampere or kiloampere for the measurement of electric
current,
(b) Millivolt, volt or kilovolt for the measurement of voltage,
(c) Ohm, kiloohm, or megaohm for the measurement of resistance,
(d) Henry, Millihenry or kilohenry for the measurement of inductance,
(e) Microfarad, millifarad or farad for the measurement of capacitance,
(f) Watt, kilowatt or megawatt for the measurement of power,
(g) Kilowatt hour, megawatt hour or gigawatt hour for the measurement of
energy.
(h) VA, KVA or MVA for the measurement of voltampere,
(i) VAR, KVAR or MVAR for the measurement of reactive power.

46. Standard to be Maintained:-

(1) The standard of the voltage, frequency or  power factor of electricity shall ha ve to be maintained in accordance with  this chapter by the licensee.
(2) If it is found that standard has not been maintained pursuant to  sub-rule (1), the inspector, by taking into account the condition of the plant  of the licensee, shall allow necessary time to improve such system and it
shall be the duty of the licensee to correct the electricity system within the  prescribed time.

47. Increase or Decrease of the Limits:

– Government of Nepal may, by  publishing a notification in Nepal Gazette, may increase or decrease the   limits of voltage, frequency and power factor mentioned in this chapter by  taking technical factors for the avoidance of dangerous effects.

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