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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | SSAC / Littelfuse |
| Manufacturer Product Number | PLR480A |
| Description | Voltage Monitor Relay; Lo V, Loss, Rev; 480 VAC; SPDT; 8-Pin Plug-in |
| Datasheet | Download Datasheet |
The Littelfuse SSAC PLR480A is a 3-phase voltage monitor for 480 V AC motors. It protects against low voltage, phase loss and phase reversal. Sensing: 3-phase delta or wye, no neutral connection.
Trip / reset points: low voltage drop-out knob-set at 350-480 VAC (about 2% hysteresis).
Reset: Automatic. Diagnostics: LED on when all voltages are acceptable and the sequence is correct.
Output: 1 Form C (SPDT), 5 A resistive @ 240 VAC; 1/4 hp @ 120 VAC. Mounting: Socket rated 600 VAC (OT08PC), DIN rail or surface, 8-pin octal plug-in. Dimensions: 81.3 x 60.7 x 45.2 mm (3.2 x 2.39 x 1.78 in), H x W x D.
It operates from 0 to +55 °C and can be stored from -40 to +85 °C.
| Category | |
| Manufacturer | SSAC / Littelfuse |
| Model | PLR |
| Monitoring Function | Low voltage, phase loss, phase reversal |
| Sensing Method | 3-phase delta or wye, no neutral connection |
| Input Voltage | 480 VAC |
| Input Operating Range | 380-500 VAC, 50/60 Hz |
| Maximum Voltage | 530 VAC |
| Low Voltage Trip / Reset | drop-out knob-set at 350-480 VAC (about 2% hysteresis) |
| Pickup Delay | 400 ms max (pull-in); 100 ms max drop-out |
| Reset Method | Automatic |
| Status Indicator | LED on when all voltages are acceptable and the sequence is correct |
| Contact Configuration | 1 Form C (SPDT) |
| Output Rating | 5 A resistive @ 240 VAC; 1/4 hp @ 120 VAC |
| Mounting Type | Socket rated 600 VAC (OT08PC), DIN rail or surface |
| Termination Style | 8-pin octal plug-in |
| Dimensions | 81.3 x 60.7 x 45.2 mm (3.2 x 2.39 x 1.78 in), H x W x D |
| Operating Temperature (Storage) | 0...+55 °C (-40...+85 °C) |