Vs1-12 Vacuum Circuit Breaker (Side-mounted)

Introduction of VS1-12
VS1-12 side-mounted vacuum circuit breaker (VBM7) is an indoor high-voltage switchgear. It is suitable for three-phase power system with rated voltage of 12 kV and frequency of 50 Hz. It is used as protection and control equipment. Because of its special advantages, it is especially suitable for frequent operation places.

VS1-12 side-mounted (VBM7) vacuum circuit breaker adopts fixed structure. It is mainly used in fixed switchgear cabinet and can be used alone to control and protect transmission and distribution lines. It is manufactured by Wenzhou Chihui Electric Co., Ltd.

Working Principle of VS1-12
Principle of Permanent Magnet Operating Mechanism
When the circuit breaker is in the position of closing or opening, no current passes through the coil. The permanent magnet keeps the core in the upper and lower limit position by using the low magneto impedance channel provided by the dynamic and static core without any mechanical lock. When there is an action signal, the current in the closing or opening coil generates magnetic potential. The magnetic field generated by the coil in the dynamic and static iron core is superposed with the magnetic field generated by the permanent magnet. The moving iron core, together with the driving rod fixed on it, drives the switch body at a specified speed in a specified time under the action of the synthetic magnetic force. Open and close tasks. The reason why this mechanism is called two-way bistable principle structure is that the moving iron core can be maintained at two positions at the end of the stroke without consuming any energy. In the traditional electromagnetic mechanism, the moving iron core is maintained at one end of the journey by the action of spring, while at the other end of the journey, it is protected by mechanical locking or electromagnetic energy. It can be seen from the above that the permanent magnet actuator realizes all the functions of the traditional circuit breaker actuator by special combination of electromagnet and permanent magnet: the permanent magnet replaces the traditional unlocking mechanism to maintain the limit position, and the opening and closing coils provide the energy needed for operation. It can be seen that due to the change of working principle, the total number of parts and components of the whole mechanism has been greatly reduced, so that the overall reliability of the mechanism may be greatly improved. Because of the characteristics of permanent magnet mechanism itself, the reliability of circuit breaker can be improved, and the closing and closing characteristics of permanent magnet mechanism are only related to coil parameters. Therefore, the closing and closing characteristics of permanent magnet mechanism can be controlled by electronic or micro-computer system, which can realize intelligent control of speed characteristics and has self-detection function. The control circuit can adopt electronic control and external closing DC contactor.

Arc extinguishing principle of arc extinguishing chamber
VS1-12/M circuit breaker (equipped with permanent magnet operating mechanism) uses vacuum interrupter with vacuum as arc extinguishing and insulating medium. The interrupter has very high vacuum. When the dynamic and static contacts are switched off under the action of the operating mechanism, vacuum arc will occur between the contacts. At the same time, due to the special structure of the contacts, vacuum arc will also occur in the contact gap. To produce appropriate longitudinal magnetic field to keep the vacuum arc diffusive and to distribute the arc evenly on the contact surface, to maintain a low arc voltage. When the current naturally passes zero, the residual ions, electrons and metal vapors can be combined or gathered on the contact surface and shield cover in microsecond order of magnitude, and the arc extinguishing chamber The dielectric insulation strength of the break is quickly restored, and the arc is extinguished to achieve the purpose of breaking. Because the vacuum circuit breaker uses magnetic field to control the vacuum arc, it has a strong and stable ability to turn on and off the current.

Technical parameters of VS1-12
Technical parameters of VS1-12 vacuum circuit breaker






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