Rishabh 252-PVR Phase Sequence & Phase Failure Relay
- Brand
- Rishabh
- Model number
- 252-PVR
- Category
- Protection & Monitoring Relays
3-phase relay that checks correct phase sequence (L1, L2, L3) and phase failure, and trips if the supply drops below 85% of nominal; for motors, pumps and compressors.
Price and availability on request
Key features
- Monitors phase sequence and phase loss of 3-phase supplies
- Symmetric under voltage protection preset at 85% of nominal
- LED trip indication
- 2 pole relay contacts
- Auto reset
- For re-generated voltages above 70% of nominal use the phase balance relay 252-PSF
- Applications: portable pumps, compressors, motor driven mixing equipment
Specifications
| Nominal voltage | 100, 110, 120, 220, 230, 240, 380, 400, 415 & 440 V (57 to 480 V) |
|---|---|
| System frequency | 50, 60 or 400 Hz (specify) |
| Burden | 3 VA |
| Overload | 1.2 x rated voltage continuously, 1.5 x rating for 10 s (BS 6253) |
| Symmetric under voltage protection | Preset at 85% of nominal |
|---|
| Type | D.P. changeover |
|---|---|
| Rating | A.C. 240 V 5 A non-inductive; D.C. 24 V 5 A resistive |
| Operations | 0.2 million at the above loads |
| Reset | Automatic |
| Operating temperature | 0 °C to +60 °C |
|---|---|
| Storage temperature | -20 °C to +70 °C |
| Temperature co-efficient | 0.05% per °C |
| Interference immunity | Electrical stress surge withstand and non function to ANSI/IEEE C37 90a |
| Enclosure | DIN-rail with wall mounting facility, flame retardant polycarbonate / ABS |
| Enclosure integrity | IP 50 |
| Dimensions | 55 mm wide x 70 mm high x 112 mm deep |
| Weight | Approx. 0.4 kg |
Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.
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