Bolted Connections - ABB ACS5000 User Manual

6.7.2.3

Bolted connections

Material requirements
Use stainless steel bolts and nuts with the appropriate steel grade and
property class for the connection (recommended: A2-70 [designation
according to ISO 3506]).
Nuts with bonded coating can be used as an alternative to uncoated
stainless steel nuts.
Connection type
The following connection type is recommended when a cable lug
(Fig. 6-17: 4) is connected to a busbar:
• Spring washer (Fig. 6-17: 1) and flat washer (Fig. 6-17: 2) on each
side of the busbar (Fig. 6-17: 3).
Other washers can be used, provided they maintain the required
contact pressure.
• Use cable lugs suitable for M12 bolts.
Lubrication
• If stainless steel bolts and nuts are used, lubricate the thread and
head contact surface of the bolt using recommended pasts, eg,
Molykote D paste.
If a coated nut (eg, with bonded molybdenum-disulfide [MoS
coating) is used, the connection does not have to be lubricated.
Tightening torque
• Tighten bolted connections with bolts of sizes M10 and greater with
the recommended nominal torque for the bolt size used.
3BHS799208 E01 REV E
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Figure 6-17 Bolted busbar connection
ACS5000 WATER-COOLED USER MANUAL
06 ELECTRICAL INSTALLATION
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