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Fuse and Circuit
Breaker Sizes
The inverter’s input power wiring must include UL Listed, dual-element, 600V fuses, or UL
Listed, inverse-time, 600V circuit breakers.
Wire Connectors
WARNING:
Field wiring connections must
be made by a UL Listed and CSA Certified
ring lug terminal connector sized for the
wire gauge being used. The connector must
be fixed using the crimping tool specified by
the connector manufacturer.
Motor Overload
Protection
Hitachi SJ300 inverters provide solid state motor overload protection, which depends on the
proper setting of the following parameters:
• B012 “electronic overload protection”
• B212 “electronic overload protection, 2nd motor”
• B312 “electronic overload protection, 3rd motor”
Set the rated current [Amperes] of the motor(s) with the above parameters. The setting range is
0.2 * rated current to 1.2 * rated current.
WARNING:
When two or more motors are connected to the inverter, they cannot be protected
by the electronic overload protection. Install an external thermal relay on each motor.
Input
Voltage
Motor
Output
200V
Inverter Model
Ampere Rating
for Fuse or
Breaker
Input
Voltage
Motor
Output
400V
Inverter Model
Ampere Rating
for Fuse or
Breaker
HP
kW
HP
kW
200V
1/2
0.4
SJ300-004LFU
10
400V
1
0.75
SJ300-007HFU/E
10
1
0.75
SJ300-007LFU
10
2
1.5
SJ300-015HFU/E
10
2
1.5
SJ300-015LFU
10
3
2.2
SJ300-022HFU/E
10
3
2.2
SJ300-022LFU
15
5
4.0
SJ300-040HFU/E
15
5
3.7
SJ300-037LFU
20
7.5
5.5
SJ300-055HFU/E
15
7.5
5.5
SJ300-055LFU
30
10
7.5
SJ300-075HFU/E
20
10
7.5
SJ300-075LFU
40
15
11
SJ300-110HFU/E
30
15
11
SJ300-110LFU
60
20
15
SJ300-150HFU/E
40
20
15
SJ300-150LFU
80
25
18.5
SJ300-185HFU/E
50
25
18.5
SJ300-185LFU
100
30
22
SJ300-220HFU/E
60
30
22
SJ300-220LFU
125
40
30
SJ300-300HFU/E
70
40
30
SJ300-300LFU
150
50
37
SJ300-370HFU/E
90
50
37
SJ300-370LFU
175
60
45
SJ300-450HFU/E
125
60
45
SJ300-450LFU
225
75
55
SJ300-550HFU/E
125
75
55
SJ300-550LFU
250
100
75
SJ300-750HFU/E
175
125
90
SJ300-900HFU/E
200
150
110
SJ300-110HFU/E
250
175
132
SJ300-1320HFE
300
200
150
SJ300-1500HFU
300
Terminal (ring lug)
Cable support
Cable