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∗ Select a UL and cUL certified fuse with Class T fuse equivalent cut-off speed or faster with the appropriate rating for
branch circuit protection, or a UL489 molded case circuit breaker (MCCB) in accordance with the table below.
FR-D720-
Rated fuse voltage(V)
Without power factor
Fuse maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-D740-
Rated fuse voltage(V)
Without power factor
Fuse maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-D720S-
Rated fuse voltage(V)
Without power factor
Fuse maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
FR-D710W-
Rated fuse voltage(V)
Without power factor
Fuse maximum
improving reactor
allowable rating
With power factor
(A)∗
improving reactor
Molded case circuit breaker (MCCB)
Maximum allowable rating (A)*
∗ Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
∗ When using the electronic thermal relay function as motor overload protection, set the rated motor current in Pr. 9
Electronic thermal O/L relay. (Refer to page 41)
∗ Short circuit current ratings
100V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 5 kA rms Symmetrical Amperes, 132V Maximum.
200V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 5 kA rms Symmetrical Amperes, 264V Maximum.
400V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 5 kA rms Symmetrical Amperes, 528V Maximum.
K(C)
0.1
0.2
15
15
15
15
15
15
K(C)
0.4
0.75
6
10
6
10
15
15
K
0.1
0.2
15
20
15
20
15
15
K
0.1
0.2
115V or more
20
20
20
20
15
15
0.4
0.75
1.5
2.2
3.7
240V or more
15
20
30
40
60
15
20
20
30
50
15
15
20
25
40
1.5
2.2
3.7
5.5
7.5
480V or more
15
20
30
40
70
10
15
25
35
60
15
15
20
30
40
0.4
0.75
1.5
2.2
240V or more
20
30
40
60
20
20
30
50
15
20
25
40
0.4
0.75
40
60
30
50
25
40
5.5
7.5
11
15
70
80
150
175
60
70
125
150
60
80
110
150
11
15
80
90
70
90
50
70
135
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