Auxiliary switching performance index testing on circuit breakers-a scientific approach

In the power system, circuit breaker is a crucial equipment, its normal operation directly affects the stability and safety of the power system. And the auxiliary switch on the circuit breaker, although small in size, its role should not be ignored. It is an important part of the circuit breaker, responsible for controlling the opening and closing state of the circuit breaker, as well as cutting off the circuit when a fault occurs to protect the safety of equipment and personnel. Therefore, rigorous testing of the performance indicators of the auxiliary switch is an important part of ensuring the safe operation of the power system.

First of all, we need to clarify the main performance indexes of the auxiliary switch. These indicators include the rated voltage, rated current, insulation resistance, contact resistance, action time, etc. of the switch. These parameters directly determine the working performance and service life of the auxiliary switch.

Next, we will introduce in detail how to test these performance indexes.

1.Test of rated voltage and rated current: This is the most basic performance index test. We can test it by connecting the auxiliary switch to the specified voltage and current and then observe whether it can work properly. If the auxiliary switch can work normally under the specified voltage and current, then it has passed this test.

2. Test of insulation resistance: Insulation resistance is an important indicator of the insulation performance of the auxiliary switch. We can measure the insulation resistance of the auxiliary switch by using an insulation resistance tester. If the measurement result meets the specified standard, then the auxiliary switch has passed this test.

3. Testing of contact resistance: Contact resistance is an important indicator of the performance of the contacts of an auxiliary switch. We can measure the contact resistance of the auxiliary switch by using a contact resistance tester. If the measurement result meets the specified standard, then the auxiliary switch has passed this test.

4. Testing of action time: Action time is an important indicator of the response speed of the auxiliary switch. We can measure the action time of an auxiliary switch by using an action time tester. If the measurement result meets the specified criteria, then the auxiliary switch has passed this test.

In general, testing the performance indexes of auxiliary switches on circuit breakers is a rigorous and important task. Only through rigorous testing can we ensure that the performance of the auxiliary switch meets the required standards, thus ensuring the stable and safe operation of the power system.