Description
MVS11-12 Vacuum Circuit Breaker (VCB) — vertical 10kV vacuum circuit breaker with a handle with embedded poles for indoor use
Rated voltage, kV: 6-10
The greatest working voltage, kV: 12
Rated current, A: 630, 1250
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Parameters
Main Parameters
Rated voltage, kV: 10
The greatest working voltage, kV: 12
Rated current, A: 630; 1250
Rated breaking current, kA: 20
Rated parameters of through short circuit currents:
— current of electrodynamic resistance, kA 51
— current thermal resistance, kA 20
— short-circuit current flow time, s 3
Nominal supply voltage of control circuits and elements of auxiliary circuits, V ~ 220; = 220
Rated current of control circuits, A, not more than:
— on / off electromagnets 1
— maximum current releases 3; 5
Range of operating voltage of control circuits (alternating current / direct current),% of Inom:
— inclusion electromagnet 70-115 / 85-105
— shutdown electromagnet 65-120 / 70-110
— spring cocking motor 85-110
Test insulation voltage of the main circuit, kV:
— one minute, frequency 50 Hz 42
— lightning impulse 1.2 / 50 μs 75
Own shutdown time, s, no more than: 0,035
Own turn-on time, s, no more than: 0,050
Contact closure / opening time at switching on / off, s, not more than 0.002
Power spring charging time in automatic mode, s, not more than: 10
Mechanical resource (number of B-tn-O cycles), not less than: 10000
Switching resource (number of B-tn-O cycles) at rated current, not less than: 10000
Switching resource (number of B-tn-O cycles) at rated breaking current, not less than: 50
Service life before decommissioning, years, not less than 30
Design features, overall and connecting dimensions of the circuit breakers make it possible to install them in the chambers of prefabricated one-way service (CSR) with the arrangement of switching equipment transverse to the busbars.
Solutions
Advantages of MVS11-12:
- Vacuum circuit breakers of this series can significantly reduce the dimensions of the switchgear
- The embedded pole design increases dielectric strength, insulation reliability and protects cameras from adverse environmental influences.
- The design of the vacuum chamber of the circuit breaker eliminates increased wear of the contacts and their premature erosion thanks to AMF technology, which distributes the arc evenly over the entire surface of the contacts.
- The circuit breaker drive has high mechanical reliability and low power consumption
- The ability to install mechanical interlocks to lock other switchgear devices from the vacuum circuit breaker.
- The ability to install maximum current releases 3A or 5A for use in circuits with bypass.
