Rishabh 256-PHV Combined Under / Over Voltage & Frequency Relay
- Brand
- Rishabh
- Model number
- 256-PHV
- Category
- Protection & Monitoring Relays
Generator and supply monitor in one: under / over voltage (75 - 125%) and under / over frequency setpoints with adjustable delays of 1 - 30 s; for 50, 60 or 400 Hz systems.
Price and availability on request
Key features
- User-adjustable setpoints for voltage and frequency
- Adjustable time delay
- Internal differential (factory settable)
- LEDs show the relay condition
- Energize / de-energize function swapping on request
- 2 pole relay contacts
- Auto reset
- Applications: gensets (AVR and governor), motors, UPS and standby supplies
Specifications
| Nominal voltage | 100, 110, 120, 220, 230, 240 V |
|---|---|
| Range | Over voltage 100 to 125%, under voltage 75 to 100% |
| Differential | Fixed internally 1% to 10% (specify) |
| Time delay | Adjustable between 1 and 30 s |
| Ranges | 40-60 Hz (50 Hz), 50-70 Hz (60 Hz) or 360-440 Hz (400 Hz) |
|---|---|
| Differential | Fixed internally 0.1 Hz to 3 Hz (10 Hz for 400 Hz unit) |
| Time delay | Adjustable between 1 and 30 s |
| Repeatability | > 0.5% of full span |
|---|
| Voltage withstand | 1.2 x rating continuously, 1.5 x rating for 10 s (BS 6253) |
|---|
| 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 | 150 mm wide x 70 mm high x 112 mm deep |
| Weight | Approx. 1 kg |
Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.
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