ABB ACS5000 User Manual page 85

ABB
Bolted connections
Material requirements
Connection type
Lubrication
Tightening torque
5k A UM
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.
The following connection type is recommended when a cable lug
12: 4) is connected to a busbar:
■ Spring washer (Fig. 6-12: 1)
side of the busbar
Other washers can be used, provided they maintain the required
contact pressure.
Fig. 6-12 Bolted busbar connection
■ Use cable lugs suitable for M12 bolts.
• If stainless steel bolts and nuts are used, lubricate the thread and
head contact surface of the bolt using recommended pastes, 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.
• Tighten bolted connections with bolts of sizes M10 and greater with
the recommended nominal torque for the bolt size used.
3BHS221906 ZAB E01 Rev. D
and flat washer
(Fig. 6-12: 3).
1 2 3
2
Chapter 6 - Electrical installation
(Fig. 6-
(Fig. 6-12: 2) on each
1
4
]
2
6-15 (22)