Rishabh 256-PRA Hot Spot 3 RTD Temperature Relay, 3 Setpoints
- Brand
- Rishabh
- Model number
- 256-PRA
- Category
- Protection & Monitoring Relays
Temperature trip relay for up to three RTD zones (motor or transformer windings): picks the highest reading, gives a 1 mA output and 3 adjustable setpoints with SPDT relays.
Price and availability on request
Key features
- Monitors up to three RTD temperature zones and selects the highest
- 1 mA analogue output of the highest temperature
- 3 adjustable setpoints with single-pole relay contacts
- Internal differential
- LED trip indication
- Automatic reset
- Applications: motors, transformers, gensets, heating equipment, ineffective cooling, blocked ventilation, overloads, worn bearings
Specifications
| A.C. | 110, 120, 220, 230, 240 V (specify) ±20%, 50 / 60 Hz |
|---|---|
| Burden | 4 VA maximum |
| Analogue output | 1 mA into 0 / 4 kΩ load |
|---|
| Relay differential | Standard 2% of range |
|---|
| Type | SP changeover, one per setpoint |
|---|---|
| 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; de-energises at the setpoint with rising temperature |
| 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. 1.4 kg |
Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.
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