Power Electronics NB WALL ADVANCED, Руководство по аппаратному обеспечению и установке

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NB Wall POWER ELECTRONICS
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TORQUE AND SCREW SIZING
TORQUE AND SCREW SIZING
The following table shows, broadly speaking, the recommended torque for both mechanical and electrical
connections, applicable to all cabinets.
SCREW SIZE RECOMMENDED TORQUE
METRIC
(mm)
ENGLISH
(inches)
DIN (Nm) ASTM (ft*lb)
6,9 QUALITY [A] 8,8 QUALITY [A] A449 TYPE 1 [A] A325 TYPE 1 [A]
M3 1/8 1 1,3
-
-
M4 5/32 2,5 3
M5 3/16 4 6
M6 1/4 5 10 4
M8 5/16 20 25 9
M10 7/16 40 50 25
M12 1/2 60 70 38 50 – 58
M14 9/16 100 120 54 -
M16 5/8 150 210 75 99 – 120
[a] For
other qualities, follow the screw’s manufacturer guidelines.
CAUTION
For all screwing that holds a particular component such as a bus, contactor, etc. it will be necessary to
apply the tightening torque indicated by the manufacturer of the same component
Screwing should be tightened correctly only when necessary, i.e. when the factory marks are not in place.
For small screws that do not have marks, the good electrical praxis will determine if it is loose.