Flyer insulation monitor LK 58940 pages

VARIMETER IMD
Insulation Monitor LK 5894
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With the new Insulation Monitor LK 5894 from the VARIMETER IMD family, DOLD

offers a convincing solution for insulation monitoring of non-earthed AC, AC/DC, and DC
power supplies (IT systems). The LK 5894 increases the availability of plants and is used for
preventive maintenance and repair. Faults are detected even during operation and costly
plant standstills are prevented. The insulation monitor was specially designed for use in
modern power supplies that often include rectifiers, converters, thyristor controllers or
directly connected DC components. EMC interference suppression measures with its
leakage capacitances against earth play an important role in this matter. DOLD's insulation
monitor meets the criteria.
Besides a faster fault localisation by selective earth fault detection and optimised measuring
times, the insulation monitor can deal with system leakage capacitances of up to 1000 µF. It
is also universally applicable in non-earthed DC/AC and mixed networks from 0 V to 690 V
nominal voltage. The maximum voltage can be up to DC 1000 V and AC 760 V without additional adaption device.
The device can be adjusted quickly and easily with its latching rotary switches. The
measuring circuit monitoring for broken wire detection and the LED chain for indication of
the current insulation resistance are further convincing features of the LK 5894.

Advantages and customer benefit
t Preventive fire and plant protection
t Early insulation fault detection during operation
t No additional ballast needed
t Fast error localisation via selective earth fault detection to L+ and Lt Suitable for universal application in non-earthed DC/AC and mixed networks
t Suitable for system leakage capacitances up to 1000 μF
t Simple adjustment via latching rotary switches
t Reliable monitoring, also in voltage-free network
t Measuring circuit monitoring of wire breakage

Our experience.Your safety.