Current Derating - Hitachi WJ Series User Manual

Chapter 17

17.3 Current Derating

 How do I derate the current?
Q
 What are the current derating characteristics according to ambient temperature and installation
conditions?
 When using a model that is checked with "✓" in the "Required" column in the table below,
A
perform current derating as shown in the graph below. When installing multiple inverters side-
by-side, the ambient temperature specification becomes -10 to +40°C.
 Set the output current value to be derated as the electronic thermal level [b012]/[b212] (refer
to "8.1.4 Setting Electronic Thermal for the Motor").
 If the product is used beyond the derating, it may cause damage to the inverter and shorten the
!
product life.
 When installing WJ200 series and WJ-C1side-by-side, follow the current delaying of the
respective models. Note that the ambient temperature specification when installing side-by-side
is -10 to +40°C also for WJ-C1.
■ Derating necessity table
Single-phase
200 V
C1-001S
C1-002S
C1-004S
C1-007S
C1-015S
C1-022S
-
-
-
-
-
✓:Derating required
Models requiring no current derating
Normal duty rating (ND)
100
80
60
Ambient temperature 50°C
40
20
0 2 4
Carrier frequency (kHz)
Three-phase
Required
200 V
- C1-001L
- C1-002L
✓ C1-004L
✓ C1-007L
- C1-015L
- C1-022L
- C1-037L
- C1-055L
- C1-075L
- C1-110L
- C1-150L
6 8 10 12 14
Specifications/Dimensions/Derating
Three-phase
Required
- C1-004H
✓ C1-007H
- C1-015H
- C1-022H
- C1-030H
- C1-040H
✓ C1-055H
- C1-075H
- C1-110H
✓ C1-150H
✓
-: Derating not required
Low duty rating (LD)
100
80
60
Ambient temperature 40°C
40
20
16 0 2
Carrier frequency (kHz)
17-3-1
Required
400 V
✓
✓
-
-
-
✓
-
-
-
✓
- -
4 6 8 10 12 14