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Circuit Breaker and Fuse Sizes

The inverter’s connections to input power must include UL Listed inverse time circuit breakers with 600V rating, or UL Listed fuses as shown in the table below.

Input

Motor Output

 

Fuse (A)

 

 

Inverter Model

(UL-rated,

Voltage

kW

HP

 

class J, 600V)

 

 

 

 

 

 

 

 

 

 

 

 

 

0.2

1/4

SJ200-002NFEF/NFU

10

 

 

 

 

 

 

0.4

1/2

SJ200-004NFEF/NFU

10

 

 

 

 

 

 

0.55

3/4

SJ200-005NFEF

10

 

 

 

 

 

 

0.75

1

SJ200-007NFEF/NFU

15

 

 

 

 

 

 

1.1

1 1/2

SJ200-011NFEF

15

 

 

 

 

 

200V

1.5

2

SJ200-015NFEF/NFU

20 (single ph.)

 

 

 

 

15 (three ph.)

 

 

 

 

 

 

2.2

3

SJ200-022NFEF/NFU

30 (single ph.)

 

 

 

 

20 (three ph.)

 

 

 

 

 

 

3.7

5

SJ200-037LFU

30

 

 

 

 

 

 

5.5

7 1/2

SJ200-055LFU

40

 

 

 

 

 

 

7.5

10

SJ200-075LFU

50

 

 

 

 

 

 

0.4

1/2

SJ200-004HFEF/HFU

3

 

 

 

 

 

 

0.75

1

SJ200-007HFEF/HFU

6

 

 

 

 

 

 

1.5

2

SJ200-015HFEF/HFU

10

 

 

 

 

 

400V

2.2

3

SJ200-022HFEF/HFU

10

 

 

 

 

3.0

4

SJ200-030HFEF

15

 

 

 

 

 

 

 

4.0

5

SJ200-040HFEF/HFU

15

 

 

 

 

 

 

5.5

7 1/2

SJ200-055HFEF/HFU

20

 

 

 

 

 

 

7.5

10

SJ200-075HFEF/HFU

25

 

 

 

 

 

Motor Overload Protection

Hitachi SJ200 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”

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.