MEMU

NVT-12 Intelligent Vacuum Circuit Breaker

Main features of the product

The solid sealed pole adopts advanced APG process technology

Adopting an integrated design of the operating mechanism and the circuit breaker body, it can be used as a fixed installation unit or combined with a dedicated propulsion mechanism to form a handcart unit

The operating mechanism is a flat spring energy storage mechanism with manual and electric energy storage functions. The energy storage and closing of the operating mechanism are divided into units using a single functional unit module, making its structure compact

The temperature induction coil that can be pre installed on the contact arm of the circuit breaker enables online measurement and monitoring of the temperature rise of the contact

Can install circuit breaker electric operation unit propulsion mechanism device

Technical parameter

Serial number Name Unit Main technical parameters
1  Rated voltage kV 12
2  Rated short-time power frequency withstand voltage (1min) 42 (relative/phase to phase)/48 (fracture)
3 Rated lightning impulse withstand voltage (peak) 75 (relative/phase to phase)/85 (fracture)
4 Rated frequency Hz 630 630 630 1250 1600
5 Rated current A 1250 1250 1250 1600
2000
1600 2000 2500
2000 2500 3150
2500 3150 4000
3150 4000
6  Rated short-circuit breaking current kA 20 25 31.5 40 50
7  Rated short-time withstand current 20 25 31.5 40 50
8  Rated short-circuit duration s 4
9  Rated peak withstand current kA 50 63 80 100 125
10  Rated short-circuit closing current 50 63 80 100 125
11  Mechanical lifespan 30000 (10000 times for 50kA)








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