2-2
Chap. 2 MOUNTING AND WIRING THE INVERTER
To utilize external cooling for inverters with a capacity of 30 kW or above, change the positions of the top and bottom
mounting bases from the edge to the center of the inverter as shown in Figure 2.3.
Screws differ in size and count for each inverter. Refer to the table below.
Table 2.4 Screw Size, Count and Tightening Torque
Inverter type
Base fixing screw
(Screw size and q'ty)
Case fixing screw
(Screw size and q'ty)
Tightening
torque
(N•m)
FRN30G1
-2/FRN37G1
-2
FRN30G1
-4 to FRN55G1
-4
M6 × 20
5 pcs for upper side,
3 pcs for lower side
M6 × 20
2 pcs for upper side
5.8
FRN45G1
-2/FRN55G1
-2
FRN75G1
-4
M6 × 20
3 pcs each for upper and lower sides
M6 × 12
3 pcs for upper side
5.8
FRN75G1
-2
FRN90G1
-4/FRN110G1
-4
M5 ×12
7 pcs each for upper and lower sides
M5 × 12
7 pcs for upper side
3.5
FRN132G1
-4/FRN160G1
-4
M5 × 16
7 pcs each for upper and lower sides
M5 × 16
7 pcs for upper side
3.5
FRN90G1
-2
FRN200G1
-4/FRN220G1
-4
M5 × 16
8 pcs each for upper and lower sides
M5 × 16
8 pcs for upper side
3.5
FRN280G1
-4/FRN315G1
-4
FRN355G1
-4/FRN400G1
-4
M5 × 16
2 pcs each for upper and lower sides
M6 × 20
6 pcs each for upper and lower sides
M5 × 16
2 pcs each for upper and lower sides
M6 × 20
6 pcs each for upper and lower sides
3.5
5.8
FRN500G1
-4/FRN630G1
-4
M8 × 20
8 pcs each for upper and lower sides
M8 × 20
8 pcs each for upper and lower sides
13.5
Note: A box (
) in the above table replaces S or E depending on the enclosure.
A box () in the above table replaces A or E depending on the shipping destination.
1) Remove all of the base fixing screws and the case fixing screws from the top of the inverter.
2) Move the top mounting base to the center of the inverter and secure it to the case fixing screw holes with the base fixing
screws. (After changing the position of the top mounting base, some screws may be left unused.)
3) Remove the base fixing screws from the bottom of the inverter, move the bottom mounting base to the center of the
inverter, and secure it with the base fixing screws, just as in step 2). (Inverters with a capacity of 220 kW or below have
no case fixing screws on the bottom.)
Figure 2.3 Changing the Positions of the Top and Bottom Mounting Bases
When changing the positions of the top and bottom mounting bases, use only the specified screws.
Otherwise, a fire or accident could occur.
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