Power Automation Sweden AB

Cylindervägen 8
13152 Nacka Strand
Sweden
MK 9837N

Frequency Relay

MK 9837N

Contacts

Auxiliary voltage

Response value

Approval

Variant

  • 0058719
  • MK9837N.12 5-600HZ UH AC230V

Technical specifications

Enclosure design: Switch cabinet
Width: 22,5 mm
1- / 3-phase: 1
Output contacts: 2 Wechsler
Auxiliary voltage required: +
Measuring range max.: 600 Hz
Standard measuring range: 1,5 ... 600 Hz
Type: MK 9837N

Advantages

  • Universal usage
  • Easy handling

Features

  • According to IEC / EN 60 255, VDE 0435 part 303
  • Detection of over- or underfrequency 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
  • 4 ranges adjustable response value 1,5 ... 200 Hz or 5 ... 600 Hz
  • Adjustable hysteresis
  • Adjustable start up time delay 0 ... 50 s at function underfrequency
  • Adjustable monitoring time for missing input signal at function overfrequency
  • 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 seperately controlled outputrelays for under- and overfrequency see MK 9837N/500
  • 2 possible compact designs:
    MK 9837N: Width 22,5 mm
    MH 9837: Width 45 mm