Link has been copied to clipboard3-Phase
Littelfuse offers a variety of 3-phase voltage monitoring relays that are designed to protect industrial equipment against voltage fault conditions. These 3-phase relays provide accurate and precise voltage measurements that activate responses to abnormal operating conditions to prevent damage to equipment. They not only detect undervoltages and overvoltages; they also detect related issues such as phase imbalance, phase loss, and phase sequence. They are offered with numerous features including adjustable trip delay, proprietary microcontroller-based circuitry, LED diagnostics, and more.
- Input voltages from 190–480 V ac to 500–600 V ac
- Input ac line frequencies of 50–60 Hz
- Typical general output load ratings of 10 A at 240 V ac
- Available with DPDT output circuitry, SPDT output circuitry, or Form A, Form B, or Form C contacts
- Fixed or user-adjusted trip time delays
- Proprietary microcontroller-based circuitry
- Surface mount and DIN rail mount versions available
- Weigh less than 1 kg
3-Phase Parts
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3-Phase Applications
- Single-phase motors
- Three-phase motors
