This 3VA1 delivers 220 kA at 240 V AC, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. At 415 V, 154 kA covers most industrial main feeders; at 690 V, 17 kA is typical for motor control center incomers.
Thermal Derating — Continuous Current vs Ambient Temperature
Above that, derating applies: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.
Auxiliary Contacts and Wiring Integration
The auxiliary switches follow the main contact position; the trip alarm switch closes only on a fault trip (thermal or magnetic), not on manual open. This gives the PLC or BMS a dedicated fault signal without needing an external relay. No undervoltage release or shunt trip is included — those are separate accessories if required.