Dold Frequency Monitoring Relay, DPDT, 15 → 280V ac, DIN Rail
- RS Stock No.:
- 181-2791
- Mfr. Part No.:
- MK9837N.12/050 5-600Hz UH=DC24V
- Brand:
- Dold
Subtotal (1 unit)*
£226.58
(exc. VAT)
£271.90
(inc. VAT)
FREE delivery for orders over £50.00
Temporarily out of stock
- Shipping from 12 November 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 + | £226.58 |
*price indicative
- RS Stock No.:
- 181-2791
- Mfr. Part No.:
- MK9837N.12/050 5-600Hz UH=DC24V
- 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 | Frequency | |
| Contact Configuration | DPDT | |
| Voltage Sensing Range | 15 → 280 V ac, 30 → 550V ac | |
| Mounting Type | DIN Rail | |
| Time Delay | 0 → 100 s, 0 → 50s | |
| Frequency Sensing Range | 5 → 600Hz | |
| Series | MK9837N | |
| Frequency Sensitivity | Overfrequency, Underfrequency | |
| Height | 90mm | |
| Maximum Voltage Sensed | 280 V ac, 550V ac | |
| Operating Temperature Range | +60°C | |
| Minimum Frequency Sensed | 5Hz | |
| Terminal Type | Screw | |
| Width | 22.5mm | |
| Maximum Operating Temperature | +60°C | |
| Maximum Frequency Sensed | 500Hz | |
| Length | 97mm | |
| Minimum Voltage Sensed | 15 V ac, 30V ac | |
| Dimensions | 97 x 22.5 x 90mm | |
| Minimum Operating Temperature | -20°C | |
Select all | ||
|---|---|---|
Brand Dold | ||
Monitoring Application Frequency | ||
Contact Configuration DPDT | ||
Voltage Sensing Range 15 → 280 V ac, 30 → 550V ac | ||
Mounting Type DIN Rail | ||
Time Delay 0 → 100 s, 0 → 50s | ||
Frequency Sensing Range 5 → 600Hz | ||
Series MK9837N | ||
Frequency Sensitivity Overfrequency, Underfrequency | ||
Height 90mm | ||
Maximum Voltage Sensed 280 V ac, 550V ac | ||
Operating Temperature Range +60°C | ||
Minimum Frequency Sensed 5Hz | ||
Terminal Type Screw | ||
Width 22.5mm | ||
Maximum Operating Temperature +60°C | ||
Maximum Frequency Sensed 500Hz | ||
Length 97mm | ||
Minimum Voltage Sensed 15 V ac, 30V ac | ||
Dimensions 97 x 22.5 x 90mm | ||
Minimum Operating Temperature -20°C | ||
- COO (Country of Origin):
- DE
Detection of over- or under frequency of alternating voltage (adjustable function)
Fast reaction time by measuring duration of cycle of input frequency
Universal measuring input for AC-voltages of 15 ... 280 V as well as 30 ... 550 V
As option with measuring input for inverters
Adjustable hysteresis
Adjustable monitoring time for missing input signal at function over frequency
Response delay programmable via terminals 0 ... 100 s
Alarm storing or auto-reset programmable via terminals
Galvanic separation between measuring input, auxiliary voltage and output contacts
MH 9837 available with wide input range for auxiliary supply (AC/DC 24 ... 60 V or AC/DC 110 ... 230 V)
2 changeover contacts, closed circuit operation
Open circuit operation on request
LED indication for auxiliary voltage, measuring voltage and alarm status
MH 9837.12/008: with galvanic separated analogue output (current/ voltage) and 11 step LED chain for the actual frequency
Device available with 2 response values and separately controlled output relays for under- and over frequency see MK 9837N/500
Fast reaction time by measuring duration of cycle of input frequency
Universal measuring input for AC-voltages of 15 ... 280 V as well as 30 ... 550 V
As option with measuring input for inverters
Adjustable hysteresis
Adjustable monitoring time for missing input signal at function over frequency
Response delay programmable via terminals 0 ... 100 s
Alarm storing or auto-reset programmable via terminals
Galvanic separation between measuring input, auxiliary voltage and output contacts
MH 9837 available with wide input range for auxiliary supply (AC/DC 24 ... 60 V or AC/DC 110 ... 230 V)
2 changeover contacts, closed circuit operation
Open circuit operation on request
LED indication for auxiliary voltage, measuring voltage and alarm status
MH 9837.12/008: with galvanic separated analogue output (current/ voltage) and 11 step LED chain for the actual frequency
Device available with 2 response values and separately controlled output relays for under- and over frequency see MK 9837N/500