Hitachi WJ C1 Series

Chapter 17 Specifications/Dimensions/Derating
17-3-1
17.3 Current Derating
 How do I derate the current?
 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,
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
Required
Three-phase
200 V
Required
Three-phase
400 V
Required
C1-001S
-
C1-001L
-
C1-004H
✓
C1-002S
-
C1-002L
✓
C1-007H
✓
C1-004S
✓
C1-004L
-
C1-015H
-
C1-007S
✓
C1-007L
-
C1-022H
-
C1-015S
-
C1-015L
-
C1-030H
-
C1-022S
-
C1-022L
-
C1-040H
✓
-
-
C1-037L
✓
C1-055H
-
-
-
C1-055L
-
C1-075H
-
-
-
C1-075L
-
C1-110H
-
-
-
C1-110L
✓
C1-150H
✓
-
-
C1-150L
✓
-
-
✓:Derating required -: Derating not required
Models requiring no current derating
16
2
4
6
8
10
12
14
0
100
80
60
40
20
Normal duty rating (ND)
Carrier frequency (kHz)
Output current (%)
2
4
6
8
10
12
0
100
80
60
40
20
14
Carrier frequency (kHz)
Low duty rating (LD)
Output current (%)
!
Ambient temperature 50°C
A
Q
Ambient temperature 40°C