Insulation monitor LK 5896

Article number: 0065131
Type: LK5896.13/100/61 DC24V 1k-250k

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

Product description

The insulation monitor LK 5896 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. 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. In addition the LK 5896 provides a second measuring circuit that can be used to monitor an inverter on the AC side also when the inverter is disconnected.

Technical specifications

Width:	90 mm
Classification:	For photovoltaic systems
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

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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 1000 V nominal voltage
Suitable for large leakage capacitances up to 3000 μF
Simplest setting via engaging rotary switches
For monitoring photovoltaic system, also with thin-film technology
Optimised measuring times - normally shorter than with known methods
Monitoring also with voltage-free mains
Additional measuring circuit allows AC output monitoring even with the inverter switched off, e.g. with hybrid vehicles
Measuring circuit with broken wire detection
No additional coupling device required
Trigger output for insulation fault locating system
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
Measuring circuits can be disconnected via control terminals, e.g. for mains couplings
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 of active measuring circuits
Automatic and manual device self-test
Alarm storage selectable
External test and reset pushbutton can be connected
Width: 90 mm

E. Dold & Söhne GmbH & Co. KG

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