Motor Overload Protection - Hitachi L300P Series Quick Reference Manual

Motor output
kW HP
1.5 2
2.2 3
4.0 5
5.5 7 1/2
7.5 10
11 15
15 20
18.5 25
22 30
30 40
37 50
45 60
55 75
75 100
90 125
110 150
132 175

Motor Overload Protection

Hitachi L300P 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
Inverter Model
–015HFU2/E2
–022HFU2/E2
–037HFU2/E2
–055HFU2/E2
–075HFU2/E2
–110HFU2/E2
–150HFU2/E2
–185HFU2/E2
–220HFU2/E2
–300HFU2/E2
–370HFU2/E2
–450HFU2/E2
–550HFU2/E2
–750HFU2/E2
–900HFU2/E2
–1100HFU2/E2
–1320HFU2/E2
Ampere Rating for
Fuse or Breaker
10
10
15
15
20
30
35
50
50
70
80
100
125
150
200
225
300
4