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What would be the highest and the lowest permissible voltage, If the voltage of the system is about 230 V?
242 and 214 V
240 and 210 V
244 and 216 V
244 and 212 V
244 and 216 V
According to the Indian Electricity Rules and BIS standards for low voltage distribution systems, the permissible variation in supply voltage for a nominal system voltage of 230 V is ┬▒6%. This regulation ensures that electrical equipment operates within safe and efficient parameters.
According to the Indian Electricity Rules and BIS standards for low voltage distribution systems, the permissible variation in supply voltage for a nominal system voltage of 230 V is ┬▒6%. This regulation ensures that electrical equipment operates within safe and efficient parameters.
VmaxтАЛ=VnтАЛ+(0.06├ЧVnтАЛ) тАФ Calculation of maximum permissible voltage
VminтАЛ=VnтАЛтИТ(0.06├ЧVnтАЛ) тАФ Calculation of minimum permissible voltage
The regulation is derived from the standard voltage tolerance limits defined for residential and commercial distribution. For a nominal voltage (VnтАЛ) of 230 V, the maximum permissible voltage is VmaxтАЛ=VnтАЛ+(0.06├ЧVnтАЛ) and the minimum permissible voltage is VminтАЛ=VnтАЛтИТ(0.06├ЧVnтАЛ). Calculating these yields 230+13.8тЙИ244 V and 230тИТ13.8тЙИ216 V.
The standard nominal voltage in India is 230 V (single phase).
The allowable voltage regulation limit is ┬▒6% for domestic supply.
Voltage fluctuations outside this range can lead to appliance malfunction or reduced lifespan.
Prevents thermal damage to inductive loads like motors.
Ensures stable performance for sensitive electronic equipment.
High cost of voltage stabilization equipment in areas with poor grid infrastructure.
Complex maintenance required for automated voltage regulators.
Residential electrical distribution design.
Industrial power quality auditing.
Historically, the tolerance was ┬▒5%, but modern grid codes often adopt ┬▒6% to accommodate higher load variations.
Option A, B, and D represent incorrect tolerance percentage calculations.
C is correct тАФ For a nominal supply of 230 V, a ┬▒6% tolerance range results in limits of 244 V and 216 V respectively.
Always verify if the question refers to the old ┬▒5% standard or the current ┬▒6% standard when solving Indian grid code problems.