Dold Italia S.r.l.

Via Privata Passo Pordoi, 5
20139 Milano
LK 5894

Insulation monitor

LK 5894


Auxiliary voltage

Alarm value

Prewarning value

Approvals and Markings


  • 0065331
  • LK5894.12/010/61 DC24V 1k-250k
The insulation monitor LK 5894 of the VARIMETER IMD family is a solution for optimal insulation... altro

Descrizione del prodotto

The insulation monitor LK 5894 of the VARIMETER IMD family is a solution for optimal insulation monitoring of modern IT systems.The device can be used in the most flexible way for AC, DC and AC/DC systems even with large leakage capacity to earth (PE). The adjustment of the setting values is simple and user friendly done on 2 rotary switches on the front of the device. Via LEDs the measured value, device parameters and device status are indicated easy to read.

Specifiche tecniche

Width: 90 mm
Response value: 1 - 250 kΩ
IMD type: AC, DC, AC/DC
Nominal voltage IT system: AC 0 - 690, DC 0 - 690 V
Auxiliary voltage: DC
Earth fault indicator: Yes
Approvals: UL
Connection for indicator: Yes
Response value type: Adjustable
Enclosure design: Switch cabinet
Type: LK 5894

Vorteile / Kundennutzen

  • Preventive fire and system protection
  • Quick fault localisation through selective earth fault detection to L+ and L-
  • Universal application in non-earthed AC, DC, AC/DC networks with up to 690 V nominal voltage
  • Suitable for large leakage capacitances up to 1000 μF
  • Simplest setting via engaging rotary switches
  • Optimised measuring times - normally shorter than with known methods
  • Monitoring also with voltage-free mains
  • Measuring circuit with broken wire detection
  • No additional coupling device required


  • Insulation monitoring according to IEC/EN 61557-8
  • Detection of symmetric and asymmetric insulation faults
  • 2 changeover contacts
  • Prewarning threshold setting range: 20 kΩ ... 2 MΩ
  • Alarm threshold setting range: 1 kΩ ... 250 kΩ
  • Energized or de-energized on trip can be selected for output relay
  • Setting the maximum leakage capacitance to shorten the response time
  • Simple, clearly arranged adjustment of the device with screwdriver
  • LED chain to indicate the current insulation resistance
  • Display of active measuring circuits
  • Automatic and manual device self-test
  • Width: 90 mm