Testing Alstom Relay Directional Power Protection (32) Functionality with a Relay Tester

Directional power protection (32) is a protective relay function that is designed to trip a circuit breaker when the power flow through a monitored power system exceeds a set threshold in a particular direction. In the case of an Alstom relay, the power flow through the system is measured using current and voltage transformers, and directional information is inferred from the phase angles of these inputs. The relay is designed to trip when the power flow exceeds the set threshold in the direction specified by the user.

To test the Directional Power Protection (32) function on an Alstom relay, certain testing equipment is required. A relay tester is needed that can generate current and voltage signals to simulate the transformer inputs to the relay. The tester should also be capable of simulating different types of faults, such as phase-to-phase and phase-to-ground faults, to ensure that the relay is properly tripping in all scenarios.

The testing process for the 32 function involves connecting the relay tester to the relay using the appropriate wiring diagrams. The tester generates current and voltage signals that are similar to the signals that would be produced by a power system. By injecting these signals into the relay, the function can be tested to ensure that it trips properly when the power flow exceeds the set threshold in the correct direction.

During the testing process, the relay tester should be programmed to simulate various fault scenarios. The results of each test, including the tripping time of the relay, should be recorded and analyzed to ensure that the relay is functioning correctly.

In conclusion, to test the Directional Power Protection (32) function on an Alstom relay, a relay tester capable of generating signals to simulate transformer inputs and various types of faults, as well as appropriate wiring diagrams are required. During the testing process, various fault scenarios should be simulated, and the results should be recorded and analyzed to ensure that the relay is functioning correctly.