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Motor Overload Protection
Hitachi SJ2002 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 parame-
ters. 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 pro-
tection. Install an external thermal relay on each motor.
400V Models
Motor output
Inverter Model
Ampere Rating for
Fuse or Breaker
kW HP
0.4 1/2 –004HFE(F)2/HFU2 3
0.75 1 –007HFE(F)2/HFU2 6
1.5 2 –015HFE(F)2/HFU2 10
2.2 3 –022HFE(F)2/HFU2 10
3.0 4 –030HFE(F)2 15
4.0 5 –040HFE(F)2/HFU2 15
5.5 7 1/2 –055HFE(F)2/HFU2 20
7.5 10 –075HFE(F)2/HFU2 25