vacuum circuit breaker 12 kV pole line spacing 210 mm 31.5 kA 1250 A secondary equipment: operating cycle counter breaker tripping signal 2 position switches for signal: "closing spring charged" closing solenoid with varistor circuitry in the secundary circuit 1 shunt release 1 undervoltage release voltage of closing solenoid DC 24V voltage of 1st shunt release DC 24V without 2nd release without 3rd release voltage of operating mechanism AC 230V auxiliary switch 12 NO+12 NC secondary connection 30-pole terminal strip mechanical interlock rating plate and operating instructions in English