QuestionJuly 24, 2025

A protective Relay with an ANSI designation number of 27 will operate when a(n) __ occurs. bus/line undervoltage instantaneous overcurrent negative undercurrent loss of excitation

A protective Relay with an ANSI designation number of 27 will operate when a(n) __ occurs. bus/line undervoltage instantaneous overcurrent negative undercurrent loss of excitation
A protective Relay with an ANSI designation number of 27 will operate
when a(n) __ occurs.
bus/line undervoltage
instantaneous overcurrent
negative undercurrent
loss of excitation

Solution
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Answer

bus/line undervoltage Explanation 1. Identify ANSI Designation The ANSI designation number 27 corresponds to an undervoltage relay. 2. Determine Operation Condition A relay with ANSI number 27 operates when there is a bus/line undervoltage condition.

Explanation

1. Identify ANSI Designation<br /> The ANSI designation number 27 corresponds to an undervoltage relay.<br /><br />2. Determine Operation Condition<br /> A relay with ANSI number 27 operates when there is a bus/line undervoltage condition.
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