Insulation monitor
LK 5895
Article number:
0065217
Type:
LK5895.12/010/61 DC24V 1k-250k
Description
The insulation monitor LK 5895 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.
Technical specifications
| Approvals: | UL |
|---|---|
| Auxiliary voltage: | DC |
| Classification: | For photovoltaic systems |
| Earth fault indicator: | Yes |
| Enclosure design: | Switch cabinet |
| IMD type: | AC, AC/DC, DC |
| Nominal voltage IT system: | AC 0 - 1000 V, DC 0 - 1000 V |
| Response value: | 1 - 250 kΩ |
| Response value type: | Adjustable |
| Type: | LK 5895 |
| Width: | 90 mm |
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Advantages / Customer benefits
- 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
- 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
- Measuring circuits can be disconnected via control terminals, e.g. for mains couplings
- 1 changeover contact each for prewarning and alarm
- 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
Accessory Items
