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For the detection of islanding, the set point for voltage relays is: OVR-1.05pu; UVR-0.95 OVR-1.1pu; UVR-0.9 OVR-1.1pu; UVR-0.88 OVR-1.2pu; UVR-0.8

Question

For the detection of islanding, the set point for voltage relays is: OVR-1.05pu; UVR-0.95 OVR-1.1pu; UVR-0.9 OVR-1.1pu; UVR-0.88 OVR-1.2pu; UVR-0.8

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Solution

The set point for voltage relays for the detection of islanding can vary depending on the specific requirements of the system. However, the options provided are:

  1. Over Voltage Relay (OVR) set at 1.05 per unit (pu) and Under Voltage Relay (UVR) set at 0.95 pu.
  2. OVR set at 1.1 pu and UVR set at 0.9 pu.
  3. OVR set at 1.1 pu and UVR set at 0.88 pu.
  4. OVR set at 1.2 pu and UVR set at 0.8 pu.

Each of these settings will provide a different level of sensitivity for the detection of islanding conditions. The specific setting chosen will depend on the characteristics of the system and the desired level of protection.

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