Eaton SVS/12, User Manual

Page: 115 / 138

Magnefix MF
994.530 G01 02 115
6. SYSTEM INSPECTION,
MAINTENANCE AND REPAIR
6.1 Inspection and maintenance
6.1.1 Maintenance intervals, 630 A and
1250 A panels
Under normal conditions, medium voltage switchgear, type
SVS/12, is maintenance free for 10 years. Thereafter,
depending on the operating conditions, maintenance is
only required once every 5 years.
This maintenance can be carried out by qualified
personnel, in accordance with the 6.1.2 guidelines
described below. The safety instructions must be
adhered to.
Eaton can undertake this work for you or, if desired, can
train your own personnel to carry out inspection and
maintenance work.
Switches that can be switched on and off remotely, and
which undergo many switching operations, so called
generator switches, are subject to an additional
maintenance requirement. For these switches, the
mechanism must be inspected after being switched 5000
times and must be replaced after being switched 10000
times. This inspection and replacement must be carried out
by Eaton.
6.1.2 Checking and maintenance of the
mechanism, 630 A and 1250 A panels
Checking the mechanism

Turn switches which are seldom or never switched on
and off ten times.
Maintenance of the mechanism
W
ARNING
During the following activities, access is gained
to the mechanism.
Avoid injuries that may be caused by
uncontrolled movements of the mechanism or
injuries caused by sharp edges of sheeting.
Access is also gained to the secondary wiring
and components; if any parts are live, the
general low-voltage safety requirements must be
observed.
1. Create safe working conditions:

Turn the appropriate switch off and set the
disconnector to the earthing position (see chapter 4
- System operation).
2. If there is no instrument compartment, remove the top
cover as follows:

Slightly loosen the 2 bolts on the back of the
installation with a spanner (size 8).

Lift the cover at the back and slide it forwards.
3. If there is an instrument compartment:

Open the door of the instrument compartment as
far as possible (150º).

Pull the inside rack out as far as possible and turn
the front of it as far as possible to the right. The
mechanism is now accessible.
4. 630 A panels
Lightly smear the turning and sliding points of the parts
concerned with Molykote paste BR2. These are shown
in figure 1.
5. 1250 A panels
Apply some Nyogel 774 VLF to the turning and sliding
points . These are shown in figure 2.
N
OTE
It is advisable to use a long-handled brush to
grease the various parts. This facilitates
greasing and prevents injuries.