Dold Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail
- RS Stock No.:
- 181-2794
- Mfr. Part No.:
- RK9871.72 3/N AC400/230V 50/60Hz
- Brand:
- Dold
Subtotal (1 unit)*
£116.87
(exc. VAT)
£140.24
(inc. VAT)
FREE delivery for orders over £50.00
Temporarily out of stock
- Shipping from 12 November 2025
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Units | Per unit |
|---|---|
| 1 + | £116.87 |
*price indicative
- RS Stock No.:
- 181-2794
- Mfr. Part No.:
- RK9871.72 3/N AC400/230V 50/60Hz
- Brand:
- Dold
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Dold | |
| Monitoring Application | Voltage | |
| Electrical Phase | 3 | |
| Contact Configuration | DPDT | |
| Voltage Sensitivity | Undervoltage | |
| Mounting Type | DIN Rail | |
| Frequency Sensing Range | 45 → 65Hz | |
| Series | RK9871 | |
| Maximum Operating Temperature | +55°C | |
| Operating Temperature Range | +55°C | |
| Minimum Frequency Sensed | 45Hz | |
| Dimensions | 66 x 17.5 x 90mm | |
| Length | 66mm | |
| Maximum Frequency Sensed | 65Hz | |
| Terminal Type | Screw | |
| Width | 17.5mm | |
| Height | 90mm | |
| Minimum Operating Temperature | -25°C | |
Select all | ||
|---|---|---|
Brand Dold | ||
Monitoring Application Voltage | ||
Electrical Phase 3 | ||
Contact Configuration DPDT | ||
Voltage Sensitivity Undervoltage | ||
Mounting Type DIN Rail | ||
Frequency Sensing Range 45 → 65Hz | ||
Series RK9871 | ||
Maximum Operating Temperature +55°C | ||
Operating Temperature Range +55°C | ||
Minimum Frequency Sensed 45Hz | ||
Dimensions 66 x 17.5 x 90mm | ||
Length 66mm | ||
Maximum Frequency Sensed 65Hz | ||
Terminal Type Screw | ||
Width 17.5mm | ||
Height 90mm | ||
Minimum Operating Temperature -25°C | ||
- COO (Country of Origin):
- DE
Detection of undervoltage in 3-phase systems
Without separately auxiliary voltage (internal supply from all 3 phases)
LED indication for operation voltage and contact position
De-energised on trip
RK 9871.71: 1 changeover contact RK 9871.72: 2 changeover contacts
With fixed time delay of 0.5s for fault indication
With fixed time delay of 1min for reset
With fixed response value at AC 195.5V
As option with test-button for function control
Width 17,5 mm
Advantages / Customer benefit
Higher safety in buildings
Application
Monitoring of undervoltage in 3 phase voltage systems and switch over to emergency supply
Without separately auxiliary voltage (internal supply from all 3 phases)
LED indication for operation voltage and contact position
De-energised on trip
RK 9871.71: 1 changeover contact RK 9871.72: 2 changeover contacts
With fixed time delay of 0.5s for fault indication
With fixed time delay of 1min for reset
With fixed response value at AC 195.5V
As option with test-button for function control
Width 17,5 mm
Advantages / Customer benefit
Higher safety in buildings
Application
Monitoring of undervoltage in 3 phase voltage systems and switch over to emergency supply