ZN63 (VS1) - 12 series indoor high-voltage vacuum circuit breaker VBP-12 series indoor medium-voltage solid-sealed vacuum circuit breaker VS1 (VBM7) - 12 series side-mounted indoor high-voltage vacuum circuit breaker VS1-12M series indoor high-voltage permanent magnet vacuum circuit breaker ZN63 (VS1) - 24KV series indoor high-voltage vacuum circuit breaker PT handcart Isolation handcart ZN28 (A) - 12 series indoor high-voltage vacuum circuit breaker ZN12-12/40.5G indoor high-voltage vacuum circuit breaker KYN1-12 armored removable series handcart ZN Port-27.5 Series Single Indoor Electrified Railway Vacuum Circuit Breaker ZN23-40.5 series indoor high-voltage vacuum circuit breaker ZN85-40.5 series indoor high-voltage vacuum circuit breaker ZN39-40.5 series indoor high-voltage vacuum circuit breaker