Rishabh 252-PVH Single Phase Over Voltage Relay, Adjustable Time Delay
- Brand
- Rishabh
- Model number
- 252-PVH
- Category
- Protection & Monitoring Relays
Single phase AC over voltage relay with user-adjustable time delay up to 10 s and 100 - 125% setpoint, for 57 - 480 V systems; DPDT contacts, auto reset.
Price and availability on request
Key features
- Over voltage setpoint adjustable over 100 - 125% of nominal
- Adjustable 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: gensets (AVR and excitation), voltage-sensitive motors, UPS and standby supply change-over, mains failure units, computer supplies.
Specifications
| Nominal voltage | 100, 110, 220, 230, 240, 380, 400, 415 or 440 V (57 to 480 V) |
|---|---|
| System frequency | 50 / 60 / 400 Hz |
| Voltage burden | 0.3 VA |
| Overload | 1.2 x rating continuously, 1.5 x rating for 10 s (BS 6253) |
| Range | Under voltage 75 to 100%, over voltage 100 to 125% of nominal input voltage |
|---|---|
| Repeatability | > 0.5% of full span |
| Differential | Preset at 1%; other values 1% to 10% on request |
| Time delay | Adjustable up to 10 s (max. 30 s) |
| Burden | 4 VA (max.) |
|---|
| 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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