▸ Product Introduction

Model decoding

V: Vacuum.

E: design serial number (Evolution)

B: Breaker.

12: Rated voltage level (kV)

Core function

Full-condition protection: interrupting rated current, overload current and maximum 50kA short-circuit current.

Fast isolation: the opening time is ≤35ms, and the fault cutting speed is 20% ahead of similar products.

Typical application

Inlet/outlet protection of 12kV distribution system, core distribution station of industrial and mining enterprises, and high-voltage side of wind power/photovoltaic box transformer (suitable for cabinets such as KYN28A-12 and XGN15-12).

Technical parameter

Intelligent control accessory

Operating power supply: DC 48V/110V/220V or AC 220V.

Communication protocol: RS485+Modbus is standard and supports IEC 61850-8-1 (optional).

Protection interface: 4× passive contact (on/off/energy storage/fault)

Key technical requirements for operation and maintenance

Mechanical characteristics monitoring:

Warning value: brake opening speed decreases by > 15% or overtravel changes by > 2mm → trigger maintenance warning.

Periodic maintenance

3 years /5000 operations: measure the resistance of the main circuit (standard: ≤25μΩ @ 1250A).

10 years: replace vacuum interrupter (depending on wear monitoring data)

Safety interlock

Forced locking logic: it is forbidden to operate the grounding knife switch when the circuit breaker is closed (in line with GB 3906 Five Preventions).