SD750FR
POWER ELECTRONICS
14
TORQUE AND SCREW SIZING
EN
TORQUE AND SCREW SIZING
The following table shows, broadly speaking, the recommended tightening torque for both mechanical and
electrical connections, applicable to all cabinets
[1, 2]:
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 hold 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.
1
Power Electronics recommends the use of
Zinc Steel quality 8.8 bolts for internal connections
in general, DC and
earth connections included.
2
Power Electronics recommends the use of
A2-70 stainless bolts for external connections
in general, AC connections
included.
Содержание SD750FR
Страница 1: ...SD750FR HARDWARE AND INSTALLATION MANUAL 4Q REGENERATIVE ACTIVE FRONT END DRIVE...
Страница 2: ......
Страница 54: ...SD750FR POWER ELECTRONICS 52 POWER CONNECTION EN Connections for frame 6...
Страница 55: ...POWER ELECTRONICS SD750FR POWER CONNECTION 53 Connections for frame 7...
Страница 56: ...SD750FR POWER ELECTRONICS 54 POWER CONNECTION EN Connections for frame 8...
Страница 79: ......
Страница 80: ...24H TECHNICAL ASSISTANCE 365 DAYS A YEAR FIND YOUR NEAREST DELEGATION POWER ELECTRONICS COM CONTACT...