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As per IE rules the maximum allowable variation between declared and actual voltage at consumer's premises should be
┬▒6%
┬▒8%
┬▒5%
┬▒10%
┬▒6%
According to the Indian Electricity (IE) Rules, 1956, and subsequent regulations set by the Central Electricity Authority (CEA), the supply voltage at the consumer's premises must not vary by more than ┬▒6% from the declared voltage for low and medium voltage systems.
According to the Indian Electricity (IE) Rules, 1956, and subsequent regulations set by the Central Electricity Authority (CEA), the supply voltage at the consumer's premises must not vary by more than ┬▒6% from the declared voltage for low and medium voltage systems.
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This regulation is necessary to ensure the safe and efficient operation of electrical appliances, which are designed to operate within specific voltage ranges. A variation exceeding 6% can lead to improper performance of induction motors, overheating of equipment, increased losses, or damage to sensitive electronic control circuits.
Applicable to low and medium voltage supply systems.
Ensures equipment longevity and stable grid operation.
The regulatory body in India responsible for these standards is the Central Electricity Authority (CEA).
Prevents damage to home appliances and industrial equipment.
Improves the power factor and overall efficiency of the distribution network.
Strict compliance requires significant investment in voltage regulation equipment like On-Load Tap Changers (OLTC) and capacitors.
Higher monitoring and maintenance costs for utility providers.
Residential power distribution
Commercial electrical supply
Industrial grid connectivity
For High Voltage (HV) and Extra High Voltage (EHV), the permissible variation is generally lower (typically ┬▒3% to ┬▒5%), depending on the specific grid code.
If the voltage falls below the -6% limit, it can cause motor stalling or increased current consumption in inductive loads due to the I2R losses.
A is correct тАФ The IE rules mandate that the variation in supply voltage at the consumer's premises should not exceed ┬▒6% of the declared voltage.
Always remember that while ┬▒6% is the standard for low/medium voltage, regulatory limits for frequency in India are stricter, being ┬▒1% of 50 Hz.