Insulation monitor
LK 5894

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.

Advantages
. 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

Features
. 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

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


Manufacturer: E. Dold & Söhne GmbH & Co. KG
Type: LK5894.12/010/61 DC24V 1k-250k
Art. No.: 0065331