VHS3-12 series indoor high-voltage AC vacuum circuit breaker (permanent magnet mechanism)Detailed product description：

The VHS3-12 series permanent magnet operated circuit breaker is mainly used in 10kV three-phase power systems with a rated frequency of 50Hz. As a protective and control electrical device, its design meets the requirements of GB1984, JB/T3855, DL/T403, IEC62271-100 and other standards. The overall structure adopts the form of an operating mechanism box and a front and rear arrangement of the arc extinguishing chamber. The bistable permanent magnet operating mechanism is placed in the front mechanism box of the arc extinguishing chamber in a flat layout. Unlike the spring operating mechanism, it applies permanent magnets to the operating mechanism to maintain the opening and closing positions of the vacuum circuit breaker through permanent magnets, replacing traditional locking devices. The moving parts are minimal, reducing the source of faults and having high reliability. This series of circuit breakers is mainly used for mid mounted switchgear (KYN type) and can also be used for fixed switchgear (XGN type). It has wide compatibility and interchangeability, and can be easily interchanged with mainstream domestic circuit breakers in a handcart style.

The main technical performance of VHS3-12 series indoor high-voltage AC vacuum circuit breaker (permanent magnet mechanism) is as follows:

Rated voltage: 12kV
Rated current: 630A~1600A
Rated short-time (4s) withstand current: 20 kA to 31.5 kA
Rated short-time (60s) power frequency withstand voltage: 42 kV (universal value); 48 kV (isolated fracture)