4
ABB Power Distribution
Contents
Page
1
Summary
6
1.1
General
6
1.2
Standards and specifications
6
1.3
Operating conditions
6
1.3.1 Normal operating conditions
6
1.3.2 Special operating conditions
6
2
Technical data
7
2.1
Electrical data
7
2.2
Resistance to internal arc faults
7
2.3
Dimensions and weights
8
3
Panel design and equipment
9
3.1
Basic structure and variants
9
3.2
Enclosure and partitioning
9
3.2.1 Ventilation of the panels
9
3.3
Compartments in the panels
10
3.3.1 Busbar compartment
10
3.3.2 Circuit-breaker compartment
10
3.3.3 Withdrawable parts
10
3.3.4 Cable compartment
10
3.3.5 Control cabinet
11
3.4
Interlocks/protection against
maloperation
11
3.4.1 Panel internal interlocking
11
3.4.2 Interlocks between panels
12
3.4.3 Locking devices
12
3.5
VD4 circuit-breaker run on-block
12
4
Despatch and storage
21
4.1
Condition on delivery
21
4.2
Packaging
21
4.3
Transport
21
4.4
Delivery
21
4.5
Intermediate storage
21
5
Erection of the switchgear on site
23
5.1
Site requirements
23
5.2
Foundations
23
5.2.1 Foundation frame on concrete floor
24
5.2.2 Raised false floor
24
5.3
Erection of the panels
24
5.4
Installation of the busbars
25
Contents
Page
5.5
Installation of the top mounted boxes
25
5.5.1 Voltage transformer for busbar metering
25
5.5.2 Earthing switch for busbar earthing
26
5.6
Pressure relief ducts
26
5.7
Connection of the cables
26
5.7.1 Power cables
26
5.7.2 Control cables
27
5.8
Earthing of the switchgear
27
5.9
Laying the ring circuits
27
5.10
Final erection work
27
6
Operation of the ZS1 switchgear
44
6.1
Start-up
44
6.1.1 Preparatory work
44
6.1.2 Start-up
44
6.2
Switching operations
45
6.2.1 Withdrawable circuit-breaker part
45
6.2.2 Withdrawable metering parts
46
6.2.3 Circuit-breaker
46
6.2.4 Tee-off earthing switch
48
6.2.5 Busbar earthing switch
48
6.2.6 Switch-disconnector
48
6.2.7 Insulating protection plate
49
6.2.8 Electrical/mechanical
annunciation/monitoring
49
6.2.9 Earthing and short-circuiting with
the earthing cable sets
50
6.3
Test procedures
50
6.3.1 Testing the off-circuit conditon
50
6.3.2 Testing for in-phase condition
51
6.3.3 Current and voltage testings
51
7
Maintenance
58
7.1
General
58
7.2
Inspection
58
7.3
Servicing
59
7.4
Repair
59
7.4.1 Switchgear in general
59
7.4.2 Replacement of complex functional groups
60
7.5
Testing withdrawable parts with
a VD4 type circuit-breaker
61
Summary of Contents for UniGear ZS1
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