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Condition Monitoring System LifeCheck ® MEASURING AND TEST DEVICES

• Maximum protection and availability of sys-
tems by means of permanent condition moni-
toring of LifeCheck-equipped SPDs

• The early detection system already detects
arrester overload and warns of imminent fail-
ure of the arrester
– Visual indication of faulty or previously dam-
aged SPDs

– Compact dimensions and minimum wiring
– Monitoring of up to 10 SPDs (40 signal lines)
– Remote signalling contact

– Remote signalling also via RS 485 interface
and PC software

Example of use of the DEHNrecord condition monitoring system.

Condition Monitoring: The ”Status Display and Service Console” PC software
The DRC MCM XT condition monitoring system is a compact DIN rail is an optional user software for the DRC MCM XT condition monitoring
mounted device for monitoring the condition of up to 10 pre-programmed system which indicates the status of the SPDs and addresses LifeCheck-
BXT arresters with integrated LifeCheck monitoring circuit. equipped BLITZDUCTOR modules.
The software can be installed on a standard PC using an RS485/USB inter-
Integrated into the SPD modules, LifeCheck permanently monitors the face converter of type ”USB-NANO 485” which is available as accessory.
proper condition of the SPD and acts like an early warning system, detect-
ing imminent electrical or thermal overload of the protection components. The software can be downloaded free of charge from
The LifeCheck status can be read out within a matter of seconds via con- www.dehn.de/download/ or is available as CD for a nominal fee.
tactless RFID technology by means of the portable DEHNrecord LC device
and also shows the date of the last test of the SPD module. Stationary
installed, the condition monitoring system supports condition-based
maintenance of 10 BXT.

The unit acts like an early warning system, generating a fault message
even in case of imminent arrester overload, indicates it by means of the
integrated three-colour LED and transmits it to one of the two integrated
remote signalling contacts. Failure of the monitoring unit, e.g. due to a
voltage breakdown, is also indicated via the remote signalling contact.
The Show function integrated into the DRC MCM system allows to detect
previously damaged SPDs in the monitoring group.

If several condition monitoring systems are used in one switchgear cabi-
net, these systems are connected via the integrated RS 485 interfaces to
synchronise the monitoring cycles. Up to 15 DRC MCM systems can be
connected to the RS 485 bus. Thus, up to 150 BLITZDUCTORs or 300 pairs
can be monitored simultaneously with minimum wiring effort.

Graphical status indication of DRC MCM XT monitoring devices
and of all programmed protection modules assigned to them.

The Service functions allow to switch to the ”Service Console”
function complex.The protection modules can be easily addressed,
tested and reset due to the user-friendly user interface.

6 www.dehn.de