The 12kV vacuum circuit breaker (VCB) VS1-12 is designed for indoor medium voltage power systems with rated voltage of 12kV and frequency of 50Hz.

It is mainly used for switching load current, overload current, and short-circuit current in power distribution systems. With advanced vacuum interrupter technology, this indoor VCB provides high reliability, strong breaking capacity, and long service life.

The breaker adopts a withdrawable (handcart) structure, suitable for KYN28 switchgear and other metal-clad panels.

Key Features

l Designed for 12kV medium voltage systems

l Rated current up to 4000A

l Breaking capacity up to 31.5kA / 40kA / 50kA

l Advanced vacuum arc extinguishing technology

l Withdrawable type for easy installation and maintenance

l High mechanical durability and stable performance

l Suitable for frequent operation

l Maintenance-free or low maintenance

l Oil-free and SF6-free, environmentally friendly

Application

The VS1-12 indoor vacuum circuit breaker is widely used in:

l 12kV switchgear systems

l Substations and power distribution networks

l Power plants

l Industrial facilities (mining, metallurgy, cement)

l Oil & gas and petrochemical industries

l Renewable energy projects (solar & wind)

Structure

The VCB VS1-12 mainly consists of:

l Vacuum interrupter

l Conductive circuit

l Spring operating mechanism

l Insulation system

l Auxiliary control unit

The compact modular design ensures stable operation and easy integration into switchgear systems.

Optional Accessories

l Shunt trip release

l Under-voltage release

l Auxiliary contacts (NO/NC)

l Motorized charging mechanism

l Intelligent controller