Under What Circumstances Do High-voltage Disconnect Switches Need Their Leads Replaced?

In the power grid system, circuit breaker high voltage isolator is responsible for disconnection and isolation. If the leads of circuit breaker high voltage isolator switch malfunction, affecting its connection to the busbar or circuit breaker, the safety and reliability of the system will decrease. During field inspections, if loose lead connections, poor contact, overheating, or even signs of burning or deformation are found, immediate replacement should be considered.

If the conductivity of the lead terminals, clamps, or conductors decreases or contact resistance increases due to corrosion, aging, or external damage, circuit breaker hv isolator may generate sparks and heat during closing or opening, affecting the performance of circuit breaker hv isolator switch. In such cases, new leads need to be replaced to restore good contact.