Insulation monitor LK 5896/900

Article number: 0066991
Type: LK5896.13/900/61 DC24V 1k-250k

The insulation monitor LK 5896/900 of the VARIMETER IMD family is a solution for optimal... more

Product description

The insulation monitor LK 5896/900 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). By using a trigger input and a trigger output 2 separate IT systems can be coupled and monitored during operation without the problem that the 2 insulation monitors disturb each other. 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. The unit has 3 relay contacts to signal Insulation and device failures. The analogue output provides a voltage and current signal proportional to the actual insulation resistance, which can be connected to a superior control (plc), another system or external display unit.

Technical specifications

Width:	90 mm
Response value:	1 - 250 kΩ
IMD type:	AC, DC, AC/DC
Nominal voltage IT system:	AC 0 - 1000, DC 0 - 1000 V
Auxiliary voltage:	DC
Earth fault indicator:	Yes
Approvals:	UL
Connection for indicator:	Yes
Response value type:	Adjustable
Enclosure design:	Switch cabinet
Type:	LK 5896/900

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Advantages

Preventive fire and system protection
System for sequential monitoring of separated voltage systems, that can be coupled
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 1000 V nominal voltage
Suitable for large leakage capacitances up to 3000 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
Analogue output for value of the insulation resistance: 0 ... 10 V / 0 ... 20 mA (2 ... 10 V / 4 ... 20 mA)

Features

Insulation monitoring according to IEC/EN 61557-8
Detection of symmetric and asymmetric insulation faults
1 changeover contact each for prewarning and alarm
3. output relay for signalling wire break and device faults
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 " measuring circuits active"
Display "Master" or "Slave"
Automatic and manual device self-test
Alarm storage selectable
External test and reset pushbutton can be connected
With watchdog timer to monitor the trigger signal
Width: 90 mm

Dold Industries Ltd