|ВБЭТ-35 III-25/630 NF1|
|ВБЭТ-35 III-25/1600 NF1|
1. General characteristics:
Designed for switching of electric circuits under normal and emergency modes in electric networks of three-phase alternating current 50Hz, for outdoor and indoor substations, power facilities, for traction substations electrified railways, as well as for frequent switching in electrothermal installations.
3. Device and components:
The breaker consists of three poles. They are collected on a separate cover installed on the frame. Poles are connected to one common set between the pole sleeves. On the frame reinforced cabinet with electromagnetic drive direct current PEMU-500. Pets food including electromagnets drive rectified current, for example, the device type power supply UKP-KN. Arc extinguishing is provided a vacuum interrupter chamber KDV-35-25/1600 NF2. The breaker comes with built-in current transformers TV-35-II. As additional insulation arc chambers used transformer oil or insulating liquid type MIDEL 7131.
4. Reliability indicator:
- Resource on the mechanical resistance of not less than 20,000 cycles, where "tn" is an arbitrary pause;
- Resource on switch resistance at rated current 630 a 1600 A and not less than 20,000 cycles;
- Resource on switch resistance at the rated tripping current of 25 kA at least 30 cycles and 70 operations;
- Service life — 30 years.