MT5Q1070c
3-1. Bus bar connection
This section describes the conditions and precautions when connecting the module to bus bar.
1.
Screw size
：
M6
2.
Screw length
：
Bus bar thi (7 ~ 9mm)
3.
Tightening torque
：
3.5 ~ 4.5Nm
<Important notes>
Do not apply excessive force to the module main terminals when connecting to bus bar. The force
applied to the end of the bus bar is much greater than at the main terminal because the moment of
force is proportional to the bus bar length. Also, do not tighten the screws if the main terminal and the
bus bar is misaligned. This may cause damage to the terminals as mechanical stress is continuously
applied to the terminals.
3-2. Maximum allowable mechanical force when connecting to bus bar
The maximum allowable mechanical force when connecting the bus bar is shown in Figure 4.
Do not exceed this value even for a moment.
3. Main terminal connection
© Fuji Electric Co., Ltd. All rights reserved.
6
Figure 4. Maximum allowable force for each direction
* Short period force applied during mounting
process
Direction of force
Maximum
allowable force*
A
5 Nm
B
3 Nm
C
500 N
D
500 N
E
5 Nm
F
5 Nm
G
500 N
H
1000 N
(a) Horizontal direction
(b) Vertical direction
A
B
C
D
E
F
G
H
