| Brand | DOLD |
|---|---|
| Housing width | 45 mm |
| Output contacts | 2 x 2 C/O contacts |
| Enclosure design | Switch cabinet |
| Phases | 1 |
| Order number | 0064817 |
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DOLD MH 9837/5_0 – Frequency Relay
- Brand
- DOLD
- Part number
- MH 9837/5_0
- Order number
- 0064817
Frequency Relay
- Separate output signals for under and over frequency
- Simple wiring
- Easy handling
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Price and lead time on request — add this part to your quote list and we will reply with pricing and availability.
The frequency relays MK 9837N/5_0 e.g. MH 9837/5_0 are used for frequency monitoring of AC voltages. They are used for monitoring the output frequenc of frequency converters (/550) or for monitoring the rotor frequency of slip ring motors. Further area of application ist the monitoring of drives in crane systems.
Features
- According to IEC/EN 60255-1
- Monitoring of AC voltage for under and overfrequency, can be used also for pre-warning (monitoring of AC voltage for under or overfrequency see datasheet MK 9837N)
- Separate relay outputs for over- or underfrequency (1 or 2 changeover contacts each)
- Alternative usage for monitoring of a frequency window
- Separate adjustment of response value for over- or underfrequency at 4 ranges each, 1.5 … 200 Hz or 5 … 600 Hz
- Second response value for prewarning possible
- 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
- Programmable hysteresis of response value: 2 … 10 %
- Start up time delay programmable via terminals from 0 … 50 s e.g. continuously
- Manual or auto-reset programmable via terminals
- Galvanic separation between measuring input, auxiliary voltage and output contacts
- MH 9837/508: With galvanic separated analogue output (current/voltage) and 11 step LED chain for the actual frequency
- MH 9837/5_0: With wide input range for auxiliary voltage available (AC/DC 24 … 60 V or AC/DC 110 … 230 V)
- Closed circuit operation (de-energized on trip)
- LED indication for auxiliary voltage, measuring voltage and alarm status
- Device available with 2 contactsMK 9837N/5_0: 2 x 1 changeover contactMH 9837/5_0: 2 x 2 changeover contacts or wide auxiliary voltage range
- 2 possible compact designs:MK 9837N/5_0: Width 22,5 mmMH 9837/5_0: Width 45 mm
Technical specifications
| 1- / 3-phase | 1 |
|---|---|
| Auxiliary voltage required | Yes |
| Enclosure design | Switch cabinet |
| Measuring range max. | 600 Hz |
| Output contacts | 2 x 2 C/O contacts |
| Standard measuring range | 1,5 – 600 Hz |
| Width | 45 mm |
| Type | MH 9837/5_0 |
Available variants
| Auxiliary voltage | AC/DC 24 – 60 V · AC/DC 110 – 230 V |
|---|---|
| Contact equipping | 2 x 1 changeover contact |
| Hysteresis | 2 – 10 % |
| Response value | 2 x 1,5 – 200 Hz · 2 x 5 – 600 Hz |
| Variant | Monitoring of AC voltage for over and underfrequency |
Tell us the variant you need in your quote request.
