hager KEH31D00S3LMA, System Manual

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Installation, handling and maintenance
Technical changes reserved 81
7.3.9 Fitting tap-off units to connection joints (250 - 1250 A)
Tap-off units can only be installed on connection joints between straight busbar
elements.
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Installing a tap-off unit requires the power to be disconnected from the
busbar trunking run (disconnected and secured from being switched on
again).
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A joint block for tap-off units (with a special joint block), available as an
accessory, is installed. The standard joint block for connection joints between
adjacent busbar elements is exchanged.
Step Action
1 Remove the covers / flanges on the intended connection joint.
2 Remove the standard joint block.
3 Insert the supplied special joint block for tap-off units into the
connection joint.
4 Open the cover of the tap-off unit.
5 Remove the cover inside the tap-off unit.
6 Place the tap-off unit on the joint block.
Result: The joint block slides into the tap-off unit.
7 Use a spanner to close the clamps at the side until the screws have
turned anti-clockwise by 90°.
8 Insert the two side bars of the joint block connecting bar into the
connection joint.
9 Insert the two centre bars of the joint block connecting bar into the
connection joint.
10 Screw the bars to the outlets of an MCCB or isolator.
11 Insert the cover in the tap-off unit.
12 Tighten the joint block up to 60 Nm.
13 Screw on the covers for the connection joint.
14 Close the cover on the tap-off unit.