Siemens 3VA5111-1MU31-0AA0 Motor Circuit Protector

This motor circuit protector uses magnetic-only, instantaneous tripping for short-circuit protection. Use it as the short-circuit protection element in a motor circuit with coordinated overload protection.

The adjustable magnetic trip lets you set the current threshold that triggers instantaneous operation. Select the setting to accommodate motor starting current while maintaining coordinated short-circuit protection.

Use the 110A rated current for motor-circuit sizing and coordination with conductors and other protective devices. Treat the rated current and the adjustable magnetic trip threshold as separate selection considerations.

Select this protector for an AC circuit within its 690VAC rated voltage. Evaluate interrupting capacity separately at the circuit's operating voltage, since voltage rating and fault-interruption capability serve different purposes.

At 480V, the interrupting rating is 65kAIC. Select it where the available fault current at the installation point does not exceed that rating.

The three-pole configuration provides a pole for each phase conductor in a three-phase circuit. Use that configuration when planning the motor circuit's power connections.

Plan for DIN rail mounting and a device envelope of 5.5 in high, 3 in wide and 3.7 in deep. Use these dimensions to allocate device space and plan conductor routing.