ZN85C-40.5/T2000-31.5 Indoor 40.5kV Vacuum Circuit Breaker

**Product Overview**  

The ZN85C-40.5/T2000-31.5 indoor high-voltage vacuum circuit breaker  

is engineered for use in three-phase AC 50Hz power systems with a  

rated voltage of 40.5kV. It is widely applied in industrial plants,  

mining operations, power stations, and substations for handling  

load currents, overloads, and short-circuit interruptions.  

Its innovative vertical design—featuring an upper and lower layout  

for the vacuum interrupter and operating mechanism—significantly  

reduces installation depth, making it ideal for space-constrained  

environments.  

Each phase is isolated using an individual epoxy resin insulation  

cylinder, forming a compact composite insulation structure. This  

design ensures compliance with air and creepage distance  

requirements, while the main circuit’s arc chambers and conductive  

interfaces are securely enclosed within the cylinders. A narrow  

phase spacing of only 300mm and all-fixed electrical connections  

enhance safety and system reliability.  

The built-in spring operating mechanism is specially designed to  

match the structural and performance needs of 40.5kV vacuum  

breakers. Integrated into the breaker frame, this mechanism features  

a simplified layout, optimized performance curve, and seamless  

compatibility with the breaker’s vertical configuration.  

With its compact form factor, reliable switching capability,  

low-maintenance design, and resilience under harsh conditions,  

this circuit breaker is well-suited for frequent operations in  

demanding applications.

Technical Data

Installation size