Suitable for motors with built-in PTC sensors in applications such as elevators, cranes, hoists and similar installations.
- Protection against phase imbalance, phase loss, phase sequence and overtemperature.
- To protect three phase devices.
- Monitoring of short circuit and broken wire in PTC circuit.
- Self-powered by voltage to be monitored.
- Visual indication of tripping cause.
- DIN rail mounting.
ST-D Model: 2 output relays, one for phase imbalance, phase loss and phase sequence and the other for overtemperature.
Protection functions
- Phase imbalance or phase loss
- Overtemperature
- Phase sequence
- Thermistor short-circuit
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