Hitachi WJ Series User Manual page 121

Chapter 8
 According to the setting of "Electronic thermal subtraction function selection [b910]", the mode
!
in which the motor/inverter common electronic thermal operates and the mode in which the
motor electronic thermal and the inverter electronic thermal operate independently can be
selected. When "Electronic thermal subtraction function selection [b910]" ≠ 00, refer to
"Changing heat dissipation characteristics of electronic thermal" in this section.
Code
Electronic thermal
*1
[b012]
level
Electronic thermal
[b910] decrease function
enable
Electron thermal operation
mode
Common
electronic
[b910] = 00 thermal for
motor and
inverter
Electronic
thermal for
motor
[b910] ≠ 00
Electronic
thermal for
inverter
● Thermal characteristics at normal duty
Overload
error
time (s)
60
3
0
110%
150%
Electron thermal level ratio
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
Mandatory Setting for Motor Drive and Test Run
Item
If a current exceeding the set value
continues to flow, protection is
applied and an "overload error
[E05]" occurs.
Set the accumulated value
subtraction function of the motor
electronic thermal. When other
than "Disable (00)" is selected, the
electronic thermal for the motor
and the electronic thermal for the
inverter operate independently.
Time-limited
characteristic
Separate
characteristics
for normal
duty/low duty
Characteristics
based on
normal duty
Separate
characteristics
for normal
duty/low duty
● Thermal characteristics at low duty
Overload
error
time (s)
60
Output
0.5
current
200% (A)
Electron thermal level ratio
8-1-8
Description
Electronic thermal Thermal
level characteristics
*1
[b012] Select by [b013]
Calculate the
accumulated load
Select by [b013]
*1
ratio from [b012]
and [b913].
Rated output
current of the Constant torque
inverter in normal characteristics
duty/ low duty
Output
current
0 120%
110% 150% (A)
Data
×
(0.20 to 1.00)
Normal duty/Low duty rated
current (A)
00 (Disable)/
01 (Enable: fixed subtraction
rate)/
02 (Enable: [b911] subtraction
rate)/
03 (Enable: [b912] time
constant subtraction)
Trip
*1
E05
*1 E05
E38
(Note) The electronic thermal time
limit characteristics change as
shown in the figure on the left
in normal duty/low duty mode
setting.
・Overload rated current:
Normal duty : 150%/1 min,
200%/3 sec.
Low duty : 120%/1 min,
150%/0.5 sec.