Mounting Busbars
Access to the busbar compartment: see Access to the Busbar Compartment.
 CAUTION |
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hazard of incorrect assembly
Comply with the specifications on treatment of contact
surfaces and the tightening torques for busbar screw fastening in
the Appendix.
Failure to follow these instructions can result in injury or equipment damage.
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Follow the below steps for mounting busbars:
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Clean all contact areas of the busbars and feeder bars in the switchgear panels and coat them with lubricant KL (see Treatment of Firmly Screw-Connected Contact Surfaces).
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Screw-fasten busbars to the feeder bars as shown in Figure 52 using four bolts (PIX 12, Figure 53) or four bolts and an electrode (PIX 17/24, Figure 52). Observe location of busbars and feeder bars (see Arrangement of Busbars in Branch-Circuit Panels).
Busbar Screw Fastening for PIX 12/17/24
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Figure 52 1 Busbar 2 Feeder bar 3 Busbar screw fastening with electrode 4 Intermediate layer |
Figure 53 1 Busbar 2 Feeder bar 3 Busbar screw fastening with electrode |
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Figure 54 1 Bolt M 12 2 Spring washers 3 Nut M 12 |
Figure 55 1 Bolt M 12 2 Lock ring 3 Electrode 4 Electrode with inner thread |
Take differing busbar screw fastening in PIX-12 busbar end panels into consideration:
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In busbar end panels, the phases L1 and L3 are required to be screw fastened to electrodes in accordance with PIX 24 (Figure 56, 1)
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In the bus section coupler, all phases L1, L2, and L3 in the lower busbar are required to be screw fastened to electrodes in accordance with PIX 24 (Figure 56, 2)
Figure 56
PIX-12 busbar end panels