90
—
6. Assembly of the switchgear at site
Rated volage
Panel width
[mm]
Max. number of parallel
cables in phase
Max. cross section
of cables [mm
2
]
Range of cable
holder
Range of reducer
ring [mm]
≤ 17.5 kV
650 3
(1)
630
Cable ties
35 - 54 mm in
case of cable
clamps
27 - 62
800
6
(2)
1 000
24 kV
800 3
(1)
1 000 6
(2)
Connection of cables in typical panels
Rated volage
Panel width
[mm]
Max. number of parallel
cables in phase
Max. cross section
of cables [mm
2
]
Range of cable
holder [mm]
Range of reducer
ring [mm]
≤ 17.5 kV
800 1 240 35 - 54 27 - 62
24 kV 1 000 1 240 35 - 54 27 - 62
Cable connection in the panel with switch-disconnector
(1) In cases where there are removable voltage transformers on the truck, or surge arresters are used, the number of parallel cables is
reduced to a max. of 2 per phase
(2) In cases where there are removable voltage transformers on the truck, or surge arresters are used, the number of parallel cables is
reduced to a max. of 4 per phase
Important note:
Connection with single-core plastic insulated
cables is presumed in typical panels. In the case
of any atypical cable connections or of special
cables (e.g. three-core cables, cables with paper
or special insulation etc.), an agreement must be
reached between the customer and ABB.
Mounting procedure for power cables:
• Power cables must be inserted, cut to length
and stripped
• Reducer rings must be adapted to the cable
diameter and fitted onto the cable
• Cable termination kits must be prepared and
mounted on cable cores according to
manufacturer’s instructions
• Cable eyes must be connected to the
prepared connection bars with strain relief
• Earthing of cables must be connected
• Individual parts of the floor covering must be
mounted
• Reducer rings must be moved down so that
nuts in the rings fit into the corresponding
recesses in the floor coverings. In this way,
the cable passages are sealed.
• Cables must be fastened by one of the
pre-prepared holder systems:
1. Cable ties
- the maximum tightening force 500N
- loose ends of the stripes can be tucked
into empty perforations in the
mounting rail
- cutting of the loose ends not
recommended
2. Cable clamps
- the maximum tightening torque
applicable to the clamp screws is
9+2 Nm
• Opening at the floor level should be sealed in
order to ensure that external IP4X will be
achieved
• The power cable entry type depends on
power cable type (1 core, 3 core) specified at
the design phase
• The standard system of holders and
openings is in any case modular enabling
flexible positioning of the openings
• The holder systems can be fully removed and
replaced by other supporting and sealing
structure (if needed due to the limited room
for cable termination)
• Alternatively, the system of non drilled
stainless steel plates can be delivered and it‘s
up to installation company to properly drill
and gland the cable entry point – customer
request only
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