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PART B Installation, Operation & Maintenance
4.1 Preparations
The following are to be made available --
An erection crane with a load carrying capacity of
about 1500 kg, and a crane hook with height of at
least 4 m (= 13 feet) above the floor.
Lifting ropes.
Dimension drawings, installation drawings,
wiring and circuit diagram.
Torque wrench for a range of 6-100 NM
Circlip pliers.
Commercially available set of open and ring
spanners size from 7 mm to 43 mm.
Cleaning and working material like cloth etc.
Conducting grease.
Spirit level.
4.2 Installation procedure
4.2.1 Installation of Breaker with cabinet
attached to the pole duct
Circuit Breaker can be transported in three
parts as explained below.
1 Cabinet with Spring-Mechanism Drive &
Electrical wiring & apparatus.
2 Duct-with-Poles and the inter-pole-links.
3 Structure Assembly
4.2.1.2 Various parts of Structure assembly:
9
1
3
5
2
6
Parts of structure assembly
10
9
7
11
5
8
4
In some cases CB is transported in two cases
1. Complete CB
2. Structure assembly.
Before delivery, both Tripping and Closing Springs are
discharged and Circuit Breaker kept in OPEN position.
Before starting installation ensure that foundation with
Foundation Bolts as per drawing is ready [Refer Fig.1a,
1b & 1c].
4.2.1.1 Unpacking of structure
Place the case horizontally on a flat surface before
opening the cover.
Check that all parts are included in the delivery.
Check the packing list.
Check that no parts have been damaged during
transport; especially the porcelain insulators.
Report any faults immediately to the ABB
representative.
List of the parts of structure
1. Upper Leg Assly- 2 Nos.
2. Lower Legs Assly – 2Nos
3. Support Angles(front and rear) 2 Nos
4. Stiffeners – 2Nos
5. Cross-Angles. – 4 Nos
6. Foundation Bolts- 4 Nos [2 Nos
Additional for CT structure ]
List of the additional parts for CT structure
7. Upper Leg Assly – 2Nos
8. Lower Leg Assly – 2 Nos
9. Support Angles – 2 Nos
10. C-Channel for C.T/P.T.- 1 No
11. Cross Angles – 2 Nos.
One Spanner each [open & ring] of size 18x19
& 24x27 needed to assemble the structure
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