Hitachi series inverter manual Motor Overload Protection

400V Models

Motor output		Inverter Model	Ampere Rating for
kW	HP		Fuse or Breaker
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

Motor Overload Protection

Hitachi L2002 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.

4