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Condition monitoring
Condition monitoring is used in industries where maximum
availability of systems and installations must be ensured and
cost-effectiveness of maintenance measures is of paramount im-
portance. LifeCheck-equipped arresters (e.g. BLITZDUCTOR XT)
are combined to form a monitoring group by means of a
stationary monitoring device and are permanently moni-
tored (Figure 8.2.6.3). If the status of the monitoring group
changes, i.e. there are one or more pre-damaged arresters, this
change is immediately indicated via the floating remote sig-
nalling contacts integrated in the monitoring device or via the
RS-485 interface. Imminent failure can be detected immediate-
ly due to the timely preventive replacement of pre-damaged
protection modules, thus preventing downtime.
Figure 8.2.6.3 Monitoring of surge protective devices by means of the
DRC MCM XT condition monitoring unit This type of SPD monitoring has the following benefits:
¨ Permanent condition monitoring of SPDs during opera-
¨ Detection of thermal and electrical pre-damage of all ar- tion
rester elements
¨ Remote signalling option via RS-485 interface and remote
The availability of installations and systems can be further in-
creased by reducing the maintenance intervals. However, the signalling contacts
cost-effectiveness of the maintenance measure must be ob- ¨ Gateway allows connection to a higher-level control system
served. or another bus system

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