Rishabh 252-PAU Single Phase Under Current Relay
- Brand
- Rishabh
- Model number
- 252-PAU
- Category
- Protection & Monitoring Relays
Single-phase AC under current relay from 1 A / 5 A CT: trips when the current falls below the 40 - 120% setpoint after an adjustable delay up to 10 s; DPDT contacts, auto reset.
Price and availability on request
Key features
- Adjustable setpoint (40 - 120% of nominal current) and time delay (up to 10 s)
- Internal differential (factory settable)
- Energize / de-energize function swapping on request
- LED trip indication
- 2 pole relay contacts
- Auto reset
- DIN-rail or wall mounting
- Applications: motors (overload, locked rotor, short circuit), gensets, broken drive belts, heating systems and any electrical load.
Specifications
| Nominal current | 1 A or 5 A from C.T. secondary; 2, 3, 4, 6, 8 or 10 A (min. 0.2 A) |
|---|---|
| Frequency | 50 / 60 / 400 Hz |
| Burden | 0.5 VA per phase |
| Overloads | 2 x rating continuously, 10 x rating for 10 seconds (BS 6253) |
| Range | 40 to 120% of nominal current |
|---|---|
| Repeatability | > 0.5% of full span |
| Differential | 1% (factory setting); 1 to 10% on request |
| Time delay | Up to 10 s adjustable (max. 30 s) |
| A.C. 50 / 60 Hz | 120, 230, 240, 400 or 415 V ±20% (57 to 480 V) |
|---|---|
| D.C. | 12, 24, 48, 110 or 120 V ±15%, max. ripple 15% |
| Burden | 4 VA maximum |
| 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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