Risk Of Poor Contact In Bimetallic Terminals

When diagnosing abnormal current or intermittent faults, focus on checking the bi metal lugs connectors connection. This type of check usually includes whether the contact surfaces of bi metallic cable lugs are corroded or contaminated, and whether the fastener torque of bimetal cable lug meets the specifications. Low tightening force may cause micro-displacement of the contact surfaces of bimetal terminal lug. Under temperature changes or vibration conditions, this micro-displacement can further impair the electrical conductivity between metals.