must be checked. If necessary, change the direction of rotation by
exchanging the connection of two phases.
Before closing the terminal box it is essential to check that:
•
The connection is done according to the connection diagram
•
All terminal box connections, mounting parts and grounding connections are firmly tightened
•
Auxiliary devices are functional
•
All minimum values of the clearance distances between bare, voltage-carrying parts towards
the ground and to each other (10mm bus 750V) are complied with
•
Unused cable entry openings and the condensate drain (if present) are sealed dust-tight and
water-tight.
When commissioning, it is advisable to observe the current consumption under load in order to
recognize any possible overload or asymmetries on the line.
6.2.
Tightening torques
Table 3
shows tightening torques for screws of the end shields, bearing caps and terminal box.
Frame size
Arrangement
End shield
Bearing cap
Terminal box cap
Terminal box
Thread / Tightening torque (Nm)
56
B3/B5/B14
M4 / 2,0 Nm
-
M4 / 1,0 Nm
M4 / 2,0 Nm
63
-
M5 / 1,5 Nm
M5 / 3,0 Nm
71
-
80
M6 / 7,0 Nm
-
90
-
M5 / 2,5 Nm
M5 / 4,0 Nm
100
M8 / 17 Nm
-
112
-
132
-
160
M6 / 7 Nm
M6 / 3,0 Nm
M6 / 4,5 Nm
180
M10 / 34 Nm
M8 / 17 Nm
200
M12 / 60 Nm
M8 / 4,0 Nm
M8 / 7,0 Nm
225
M10 / 34 Nm
250
M8 / 4,5 Nm
M10 / 11,5 Nm
280
315
M16 / 149 Nm
M10 / 5,5 Nm
M10 / 12,5 Nm
355
M20 / 290 Nm
M12 / 7,0 Nm
M12 / 16,0 Nm
400
Table 3.
Tightening torques for terminal box, end shield and bearing cap.
If a motor has an arrangement on feet (type B3, B34, B35), the following tightening torques for the
screws on the motor feet must be complied with:
Thread
Tightening torque (Nm) Min.
Tightening torque (Nm) Max.
M4
2,0
3,0
M5
3,5
5,0
M6
6,0
9,0
M8
16,0
24,0
M10
30,0
44,0
M12
46,0
70,0
M16
110,0
165,0
M20
225,0
340,0
SEVA-tec GmbH - Lether Gerwerbestrasse 10 - 26197 Ahlhorn - www.seva-tec.de
8
Table 4. Tightening torques for motor feet screws.
