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54
U N I G E A R Z S 2 I N S TA L L AT I O N , O P E R AT I O N A N D M A I N TA I N A N C E I N S T R U C T I O N M A N U A L
—
Figure 82- View of the busbar compartment, shown without
insulating covers.
1. Dropper
2. Rear cover of busbar compartment, removable
3. Bushings
•
Visually check the connections of the current
transformers.
•
Using a dynamometric spanner, check the
tightness of all the screws. Refer to the section
6 for the tightening values.
Cleaning and checking of the voltage
transformers
Fixed version voltage transformers:
•
Open the cable compartment rear cover
•
Visually check the voltage transformer
connections.
•
Using a dynamometric spanner, check the
tightness of all the screws. Refer to the section
6 for the tightening values.
•
Carry out a visual inspection of the
transformers and check for any presence
of dirt.
•
Remove any deposits of dust using a dry cloth
that does not leave any deposits on the
treated surfaces (do not use woolen cloths).
—
Figure 83-: Internal view of the cable connection compartment
1. Earthing switch position indicator
2. Cable connection bar
3. Cable clamp
3
1
3
1
2
Bus side Voltage transformer in removable
version:
•
Open the Circuit Breaker compartment lower
rear cover.
•
Manually withdraw the VT truck by using VT
extraction truck
•
Carry out a visual inspection of the
transformers and check for any presence
of dirt.
•
Remove any deposits of dust using a dry cloth
that does not leave any deposits on the
treated surfaces (do not use woollen cloths).
2
1
—
Figure 84- Manual earthing switch operating mechanism.
1. Drive shaft
2. Auxiliary contact
9.4.3 Maintenance of Circuit-Breaker
compartment
Lubrication of the isolating contacts:
•
Remove any deposits of dust using a dry cloth
that does not leave any deposits on the
treated surfaces (do not use woollen cloths).
—
Figure 85 -Bus Side Voltage Transformer in Circuit Breaker
compartment
2
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