Dold Industries Ltd

11 Hamberts Rd. Blackall Ind. Estate
South Woodham Ferrers
GB-Essex, CM3 5UW
MK 9143N

Mains Frequency Monitor

MK 9143N

Contacts

Auxiliary voltage

Start up delay

Response value

Alarm delay

Variant

  • 0060936
  • MK9143N.38 +/-5Hz UH AC230V
The MK 9143N and MH 9143 mains frequency monitors are used to monitor the frequency of 50 and 60... more

Product description

The MK 9143N and MH 9143 mains frequency monitors are used to monitor the frequency of 50 and 60 Hz power supplies for over- and underfrequency. They are used for monitoring self-generating systems and local power supplies, as well as for monitoring generators, power units, etc.

Technical specifications

Measuring range max.: 50/60 Hz
Standard measuring range: 50/60 Hz
1- / 3-phase: 1
Operate delay: Yes
Output contacts: 2 x 1 C/O contacts
Width: 22,5 mm
Enclosure design: Switch cabinet
Auxiliary voltage required: Yes
Type: MK 9143N

Advantages

  • Monitoring of 50 - and 60 Hz-current supply on over- and underfrequency
  • For precise frequency measuring with fast response time
  • High disturbance immunity
  • Separately adjustable trip points and separate outputs for overand underfrequency (1 or 2 c/o each)

Features

  • According to IEC / EN 60255-1
  • Monitoring of local generator sets and voltage supplies
  • MK 9143N / MH 9143:
    - Trip points adjustable precisely and reproducible on 10 step rotational switch in the range of ± 0,1 Hz to ± 5 Hz related to 50 or 60 Hz
    - Nominal frequency 50 or 60 Hz selectable
    - Fixed hysteresis optimised for trip point
    - Time delay for over and underfrequency each adjustable from 0 to 20 s
    - As option one common output for under and overfrequency
    - “Window”-mode (MK 9143N/400 / MH 9143/400)
  • MH 9143.38/008: With galvanic separated analogue output (current voltage) and 11 step LED chain for the actual frequency
  • MK 9143N/600 / MH 9143/600:
    - Variable alarm value in the range of 45 to 65 Hz
    - Hysteresis adjustable for under- and overfrequency separately adjustable 0 … 20 %
    - Common output for under and overfrequency “Window”-mode can be selected
  • Start up delay 0 … 30 s selectable
  • Manual or auto reset selectable
  • Output relay energized or de-energized on trip selectable for overfrequency
  • Output relay de-energized on trip for underfrequency
  • Universal frequency measuring input for AC 40 … 550 V
  • Several options for auxiliary supply
  • As option without aux. supply for voltage range AC 18 … 70 V or 70 … 275 V
  • LED indicators for auxiliary supply, input frequency, over and under frequency alarm
  • 2 possible contact arrangements
    MK 9143N and MK 9143N/600: 2 x 1 C/O contacts, width 22,5 mm
    MH 9143 and MH 9143/600: 2 x 2 C/O contacts, width 45 mm