VD4M1206-25 ABB vacuum circuit breaker

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Overview

Essential details：VD4M1206-25 ABB vacuum circuit breaker

Products Description

The new VD4 vacuum circuit breaker is the perfect combination of ABB’s renowned development and manufacturing technology for the knockout chamber and castable pole, as well as advanced operating mechanism development, design and production technology. The listening chamber of VD4 Zhongle vacuum circuit breaker is cast in a ring resin. The overall flow column structure is more robust, which provides more adequate protection for the vacuum isolation chamber and eliminates dust and moisture
Influence of external insulation capacity of arc chamber. The main contact of the switch is permanently sealed in a vacuum environment to form a breaking and extinguishing unit. The vacuum circuit breaker does not require a quenching and green medium, and there is no material that can be ionized in the chamber. In any case, when the contacts are separated, the electrical isolation channel between the contacts consists solely of the gold vapor of the contact material. Electricity can only be maintained by external energy, when the main circuit current disappears at the natural zero crossing time, the arc is not maintained, at this moment, the rapid decline in the current carrying density and the rapid condensation of the vacuum whole house gas, so that the insulation between the contacts is quickly restored. The vacuum quench chamber thus restores insulation and the ability to withstand the system’s transient recovery voltage, ultimately extinguishing the arc

VD4M1206-25

The special design of contact geometry and contact material, as well as very short burning time and very low arc voltage, make the head burn degree is very low to ensure the long life of the knocker chamber. Vacuum can also be prevented
Contacts are oxidized and contaminated
Type LL operating mechanism
Modern vacuum chamber contacts require low separation speed, small stroke, light weight, and only need the mechanism to provide little operating work. This ensures low wear on the operating system and means that the circuit breaker requires very little maintenance. The VD4 circuit breaker uses a modular mechanical operating mechanism with elastic energy storage and free tripping. The opening and closing performance of circuit breaker has nothing to do with the specific operator. The operating mechanism is simple in concept and easy to use, and can be freely selected with secondary accessories that can be easily and quickly installed. The simple design idea brings high reliability of components.

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