Dold MH9837.38/500 2x5-600HZ Tv=0, Frequency Relay, sku: 0064839

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.

• 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 contacts
  MK 9837N/5_0: 2 x 1 changeover contact
  MH 9837/5_0: 2 x 2 changeover contacts or wide auxiliary voltage range
• 2 possible compact designs:
  MK 9837N/5_0: Width 22,5 mm
  MH 9837/5_0: Width 45 mm