Standard Requirements For The Opening And Closing Of Auxiliary Contacts During The Operation Of Distribution Cabinets

In the daily operation of Powbinet, the operating accuracy of the auxiliary contacts directly affects the safety and stability of the system. The auxiliary contacts must operate accurately in both open and closed states, and the contact conditions must remain consistent to prevent abnormal currents or signal deviations during operation.

Detection and Adjustment of Auxiliary Contact Operation

The detection of the open and closed states of the auxiliary contacts should be performed using specialized tools.

• Contact Pressure Check: Measure the contact closing force using a pressure gauge to ensure that the closed contact gap meets the standard.

• Action Response Test: Use a relay action tester to test the response time and action sequence of the contacts during switchgear operation.

• Wear Assessment: Regularly check the contact surface for oxidation or mechanical wear, and promptly mark the areas requiring maintenance.

All operational data should be recorded in the maintenance file to track the long-term operating status of the switchgear. These steps provide a reference for operators and reduce the risk of electrical faults caused by contact abnormalities.

Switchgear Operation Procedures

Operators should follow the operating procedures when performing opening and closing operations on the switchgear in the field. Opening and closing operations should be smooth to avoid contact damage caused by impact. The operating sequence must conform to the design logic of the distribution cabinet, ensuring that each auxiliary contact works in coordination within its corresponding circuit. During routine inspections, the contact status indications must match the actual opening and closing status; any deviations should be recorded and analyzed promptly.