ABB VersaRupter, Installation, Operation And Maintanance Manual

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VersaRupter MV Indoor Switch | Installation and Operation Manual
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Service and Maintenance
Cleaning
After maintenance, the VersaRupter must be cleaned be-
fore being put into service. Strong solvents and alcoholic
fluids must not be used. For cleaning, water with soap can
be used. After cleaning, the contact area of the main
blades and the fixed contacts must be greased with
ISOFLEX TOPAS NCA 52. If the VersaRupter is placed in a
very humid and polluted area, which will reduce the track-
ing resistance, it is recommended to polish the insulators
and insulated components with Silicon Type DC200 Fluid
100 cst.
VersaRupters in Service
The VersaRupter should be checked at least once a year by
conducting a number of operations to check all the func-
tions. The frequency of maintenance depends on the ser-
vice and environmental conditions.

Moving and fixed contacts are greased with ISOFLEX
TOPAS NCA 52.

Mechanisms do not need any greasing under normal
conditions.
Overall quality checks (mechanical and electrical) is re-
quested after possible short circuit events. The replace-
ment of damaged parts or complete replacement should be
done in line with the VersaRupter conditions observed.
Special attention should be focused on the main contacts.
A continuous layer of coating material should be present
on the silver plated contacts. Affected components need
to be replaced with new ones. Fuses must be replaced if
present. The proper fuses may be found in the VersaRupt-
er catalog.
Note!
Arcing knives, piston and cylinder must not be greased.
Mechanical overhaul
For new design “NAL New Design”, maintenance can be
done in 15 year intervals if the following service conditions
are met:
1. VersaRupter must be transported and stored in a genu-
ine box.
2. Installation service conditions:
a. VersaRupter must work in indoor application
under normal service conditions according to
IEEE C37.20.4.
b. VersaRupter must be installed by staff who
have read this manual and installed
according to manufacturer’s recommendation.
c. Maximum number of mechanical cycles of 1000
must not be exceeded.
d. Maximum values and numbers of the making
and breaking capacity must not be exceeded.
e. Safe distanced to earthed parts or to other live
parts must be kept.
f. In special cases (fault in circuit where Versa-
Rupter is installed or the apparatus will be
overloaded) VersaRupter should be inspected.
g. VersaRupter is not installed vertically with
hollow insulators at the bottom which could
cause condensation in the hollow insulators
and arc extinguishing system.
Complete overhaul of the VersaRupter should be carried
out after 1000 operations or 5 (15 for new switch versions)
years in service, preferably by ABB’s staff.
Electrical Overhaul
The frequency of overhaul depends on the number of oper-
ations and the magnitude of the breaking current. After
about 100 operations at rated current or about 500 opera-
tions at half the rated current, the main contacts, the arc-
ing contacts and the arc extinguishing chamber should be
inspected and replaced if necessary.
Replacement should take place when:

The tip of the arcing contact knives has diminished
approximately 3 mm (minor damage might only cause
polishing of the arcing tip).

The fixed arcing fingers are burned or do not make any
contact.

The width of the slot in the arcing chamber is more
than 8 mm.
If the copper is visible on any current carrying bus part,
then this part should be replaced by a new one.