Monitoring And Replacing Transient Protective Devices; Battery Disposal And Recycling - Eaton Powerware 3G System SC200 Installation And Operation Manual

3G-SC200 Data-Voice-Video Power Solutions Installation Guide
Step 6 - Remove the LVD bridge cable(s) (if fitted)
Procedure complete

Monitoring and Replacing Transient Protective Devices

For information on transient protection devices refer to Input Transient Protection on page
73.
Metal oxide varistors (MOVs) are the most widely used transient protective devices. MOVs
are generally fitted in the main AC switchboard of the building for primary transient
protection, and in the DC power system's AC distribution module or AC sub-switchboard for
secondary transient protection.
Monitoring the MOVs
MOVs are fitted with alarm contacts and visual indicators. Connect these alarms to the
supervisory module and from there extended to the building or network management
system. If the MOVs are not monitored automatically, then regular visual inspections must
be carried out.
Replacing the MOVs
MOVs must be functional at all times. In practice, it is impossible to predict when a MOV
will fail. That depends entirely on the number and magnitude of the transients sustained.
For that reason we recommend the following, depending on how accessible the site is.
For easily accessible sites – If a MOV has failed (as indicated by a MOV Fail alarm or
•
the visual indicator), then replace all the MOVs as soon as possible.
For remote sites with difficult access – Replace all the MOVs during scheduled
•
maintenance visits, whether they have failed or not.
We strongly recommend inspecting the MOVs in the main AC switchboard at the same time
and replacing them as appropriate.
If any MOV or other transient protection device has failed then the design of the primary and
secondary transient protection systems, and the maintenance plan, at that site must be
reviewed.

Battery Disposal and Recycling

Follow Environmental Protection Agency (EPA) guidelines or the equivalent local
regulations to dispose of all batteries. Please remember that the owner is responsible and
liable to ensure those EPA guidelines or equivalent local regulations are followed.
For assistance refer to Worldwide Support on page 93.
56
Ignore this step if no LVD bridge cable was fitted.
Copyright © 2005-2007 Eaton Corporation. All Rights Reserved.
IPN 997-00012-54A July 2007