The MZZ61-12 series vacuum circuit breaker is a high-voltage indoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. This product complies with GB1984-89 standard, and its overall structure consists of two forms: integrated installation of switch body and operating mechanism, and separate installation of switch body and operating mechanism. The integrated structure is the basic type of MZZ61-12. The split structure is MZZ61A-12 type, suitable for various fixed switchgear such as GG-1A (Z), XGZ2A10 (Z), etc. This product can be equipped with CD17 and CD10A DC electromagnetic operating mechanisms, as well as CT17 and CT19 spring energy storage operating mechanisms.

Structural characteristics of MZZ61-12 series vacuum circuit breaker:
Model meaning

Working and environmental conditions
1. Environmental temperature: upper limit+40 ℃, lower limit -15 ℃.
2. Altitude: 1000m;
3. The daily average relative humidity of the air is not more than 95%, and the monthly average is not more than 90%. The daily average saturated vapor pressure is not greater than 2.2 × 10-3MPa,
The monthly average value shall not exceed 1.8 × 10-3MPa.
4. The seismic intensity shall not exceed 8 degrees;
5. The place of use is free from condensation, flammability, explosiveness, severe pollution, chemical corrosion, and severe vibration.

Main parameters of MZZ61-12 series vacuum circuit breaker

Appearance and installation dimensions
Figure 1MZZ61-12 Outline Dimensional Drawing of Vacuum Circuit Breaker

Figure 2: Dimensions of MZZ61-12/T Vacuum Circuit Breaker