When testing a newly installed 25 sync check relay, which of the following tests would you NOT expect to perform?

The correct answer indicates that during the testing of a newly installed 25 sync check relay, one might not typically determine the maximum torque angle and directional characteristic. This is because the primary purpose of a sync check relay is to ensure that two systems can be synchronized safely before closing the breaker. The relay primarily monitors voltage levels, phase angles, and frequency differences.

In the context of options A, B, and C, these tests are directly relevant to the functioning of a sync check relay.

Determining various set points, such as live line, live bus, dead line, and dead bus set points, is crucial for assessing the operating parameters of the relay to ensure it can accomplish its task effectively.

Verifying the control functions between different configurations (dead bus/live line, dead line/live bus, and dead bus/dead line) is essential to confirm the relay's capability to perform its protective and control duties under various scenarios.

Testing for the maximum voltage differential that permits closing at zero degrees is also key to ensure safe synchronization of the systems. This aspect focuses on the allowable voltage difference and phase alignment for closing the circuit without damaging equipment.

In summary, while options A, B, and C relate directly to the operational safety protocols of the