From the following message Which is correct?
- 59-Overvoltage Relay and 27-Undervoltage Relay used to protect the voltage in the electrical system.
- 25-Synchronism Relay Use to check the frequency And the phase angle of the voltage in two circuits that will be connected in parallel
- 59 Overvoltage Relay and 81-Undervoltage Relay used to protect the frequency in the wrong electrical system.
- 21-Distance Relay and 87-Differential Relay to protect transformer equipment in electrical systems
A. Article 1 and 2
B. Article 1 and 3
C. Article 2 and 3
D. Article 3 and 4
Show Answer
Answer: A
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