ABB ACS850 Hardware Manual page 96

96
3 Busbars
3.1 The types (Al/Cu) and cross-sections of busbars are correct.
3.2 Busbars are intact and joint surfaces are clean. There are no metal scraps on the busbars that could
cause a short-circuit.
3.3 The placement and mounting of busbars is correct.
3.4 The electrical connection of busbars. Check that the surfaces in electrical connections of aluminium
and uncoated busbars are rubbed. Check that anti-oxidant joint compound is used in electrical
connections of aluminium busbars. Check that the number of washers and the sizes of bolts are
correct.
3.5 Busbar supports and lead-in insulators are visually intact and degreased, and placed and mounted
correctly.
3.6 The electrical connections on the main circuit are tightened to required torque and marked with a
green marking.
4 Cabling and wiring
4.1 Wiring of the main circuit. Check
• AC supply input
• AC output
• supply for brake resistor (if used).
4.2 Wiring of the drive module control circuit. Check
• JCU Control Unit connections
• control cable connections
• control panel cable connections.
4.3 Cable types, cross-sections, colours and optional markings are correct.
4.4 Check the cabling for circuits susceptible to interference. Check the twisting of cables and cable
routes.
4.5 Check that cables without short-circuit protection
• can carry the load current
• are shorter than 3 m (10 ft)
• are assembled separate to other cables
• are protected by an enclosure or duct.
4.6 Connection of cables to devices and terminal blocks. Check that
• cables are connected to terminals tight enough by pulling the cable
• cable termination on terminals chaining is done correctly
• bare conductors are not too far outside the terminal causing an insufficient clearance or loss of
shielding against contact.
4.7 Cables are not lying against sharp edges or bare live parts. Bending radius of fiber optic cables at least
3.5 cm (1.38 in.).
4.8 The type, markings, insulation plates and cross connections of terminal blocks are correct.
Installation checklist
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