ABB ZS1 Instruction Manual page 25

5.5.2 Earthing switch for busbar earthing
(Figures 5/14 to 5/17)
• Top mounted box 77 with screwing material
from the group of bags „top mounted box for
earthing" is to be mounted on the busbar
compartment.
• Operating mechanism box 78 with screwing
material from the group of bags „top mounted
box for earthing is to be mounted on the control
cabinet.
• Pre-mounted single parts of the hexagonal shaft
78.1 are to be removed.
Please pay attention to the sequence and angle
of the parts!
• Hexagonal shaft from the operating mechanism
box is to be pushed through into the bevel gear
of the earthing switch.
Sequence and angles of the parts are to be
restored!
• Connecting bars 2.2 with the tee-off conductors
2 at the junction point are to be screwed
together according to figure 5/14. However, if
necessary, the additional spacer plate 3.2 and
threaded plate 3.8 as well as the screwing
material from the group of bags „top mounted
box for earthing" are to be used.
• Insulating cover 58 is to be brought into position
as described in section 5.4.
Note:
The auxiliary switches for the earthing switch are
adjusted at the works. Problem-free functioning is
only guaranteed if the functioning elements on the
hexagonal shaft are correctly mounted.
Due to the final installation of the earthing switch
and operating mechanism at the site, it may be
necessary to undertake an exact adjustment of the
auxiliary switches. In this case the following is
important:
• The auxiliary switch OFF 78.5 must be operated
– before the slide 78.2 has uncovered half of
the opening in front of the hexagonal shaft
and
– before the lower edge of the slide has
touched the anker of the blocking magnet
78.6.
• The auxiliary switch ON 78.4 must be operated
– before the toggle spring of the earthing switch
has reached its dead point.
• The push-rod of the auxiliary switch must still
have about 0,5 mm to go to the end position in
the operated position.
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5.6 Pressure relief ducts
(Figures 3/1 and 5/18)
• The pressure-relief duct is supplied dismantled
in single parts. The rear wall 50.1 and the front
wall 50.2 correspond, as far as length is
concerned, to the appropriate panel width. They
are joined together by means of the attachment
strips 50.3.
• The screwing material is contained in the group
of bags „pressure relief duct". Rivet nuts are
already present in the metal sheets.
Note:
The rear pressure relief flap must be mounted
according to figure 5/18, detail X.
Details regarding connection to the wall and the
discharge grating 50.4 for pressure relief outside of
the switch room will be agreed with the customers
concerend. In the case of pressure relief within the
switchroom, the absorber grating 50.5, which is
also supplied together with the rest of the
equipment, is to be installed.
5.7 Connection of the cables
5.7.1 Power cables
(Figures 3/12, 3/13, 5/19 to 5/21)
1. Standard equipment:
a) Panel width 650 mm:
• Connection points for 9 single cores with
M12 socket head bolts
• 9 cable clamps for core diameters
36 - 52 mm
• 3-section floor covering with reducing rings
• M10 connection points for the earth
connections of the cable screens.
b) Panel width 800 mm:
• Up to 1250 A corresponding to the
650 mm width panel
• From 1600 A corresponding to the
1000 mm width panel.
c) Panel width 1000 mm:
• Connection points for 18 single cores with
M12 and M16 socket head bolts
• 18 cable clamps for core diameters
50-75 mm
• 3-section floor covering with reducing rings
• M10 connection
connections of the cable screens.
points for the earth
ABB Power Distribution