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According to grid standard regulation by Central Electricity Authority (CEA), the maximum permissible value of voltage unbalance for a 220 kV line is:
1. 2%
2. 1.5%
3. 4%
4. 3%

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Correct Answer - Option 1 : 2%

According to grid standard regulation by Central Electricity Authority (CEA), the maximum permissible values of voltage unbalance shall be as specified below.

Nominal System Voltage (kV rms)

Voltage unbalance (%)

765 and 400

1.5%

220

2%

33 to 132

3%

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