Installation and Connection
3
CFW-11 | 3-21
Input fuses:
Use High Speed Fuses at the input for the protection of the inverter rectifier and wiring refer to Table 3.2 on
page 3-21 for selecting the appropriate fuse rating (I
2
t must be equal to or less than indicated in Table 3.2
on page 3-21, consider the cold (and not the fusion) current extinction value).
In order to meet UL requirements, use class J fuses at the inverter supply with a current not higher than the
values of Table 3.2 on page 3-21.
Optionally, slow blow fuses can be used at the input they must be sized for 1.2 x the inverter rated input
current. In this case, the installation is protected against short-circuit, but not the inverter input rectifier. This
may result in major damage to the inverter in the event of an internal component failure.
Table 3.2 - Recommended wire size/fuses - use copper wire (75 ºC (167 ºF)) - frame size B, 500 to 600 Vac supply voltage
Model
Power Terminals
Overload
Class
Wire Size Recommended Fuse
Terminals
Screw
Thread/
Screw
Head Type
Recommended
Torque
N.m (lbf.in)
mm
2
AWG
Wire
Terminal
Bype
I²t UL WEG Fuse
[A²s] [A] In[A] Model
CFW110002T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND
1.5
14
Pin
terminal
1250 20 20 FNH00-20K-A
(PE)
M4
(Phillips
head)
1.7 (15.0) 2.5
Ring
tongue
CFW110004T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND
1.5
14
Pin
terminal
1250 20 20 FNH00-20K-A
(PE)
M4
(Phillips
head)
1.7 (15.0) 2.5
Ring
tongue
CFW110007T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND
1.5
14
Pin
terminal
1250 20 20 FNH00-20K-A
(PE)
M4
(Phillips
head)
1.7 (15.0) 2.5
Ring
tongue
CFW110010T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND 2.5 14
Pin
terminal
1250 20 20 FNH00-20K-A
(PE)
M4
(Phillips
head)
1.7 (15.0)
Ring
tongue
CFW110012T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND 2.5 12
Pin
terminal
1250 25 25 FNH00-25K-A
(PE)
M4
(Phillips
head)
1.7 (15.0)
Ring
tongue
CFW110017T5
R/L1 - S/L2 - T/L3 -
U/T1 - V/T2 - W/T3
DC+, DC-
(1)
M4
(Slotted
and Phillips
head)
(comb)
1.2 (10.8)
HD/ND 4 10
Pin
terminal
1250 40 35 FNH00-35K-A
(PE)
M4
(Phillips
head)
1.7 (15.0)
Ring
tongue
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