Reduced Torque Characteristic; Constant Torque Characteristic - Hitachi SJ300 Series Instruction Manual
Hitachi instruction manual inverter sj300 series
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Also See for SJ300 Series:
- Manual (48 pages) ,
- Quick reference manual (43 pages) ,
- Replacement manual (23 pages)
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4–56
Using Intelligent Output Terminals
The table below shows the settings and their meanings. Use the one that matches your load.
Function Code
B013 / B213 /B313
Reduced Torque Characteristic – The example below shows the effect of the reduced torque
characteristic curve (for example motor and current rating). At 20Hz, the output current is
reduced by a factor of 0.8 for given trip times.
Trip current
reduction
factor
x 1.0
x 0.8
x 0.6
0
5
20
Constant Torque Characteristic – Selecting the constant torque characteristic for the example
motor gives the curves below. At 2.5 Hz, the output current is reduced by a factor of 0.9 for
given trip times.
Trip current
reduction
factor
x 1.0
x 0.9
x 0.8
0
2.5
5
Free Thermal Characteristic - It is possible to set the electronic thermal characteristic using a
free-form curve defined by three data points, according to the table below.
Function
Name
Code
B015 /
Free-setting electronic
B017 /
thermal frequency 1, 2, 3
B019
B016 /
Free setting electronic
B018 /
thermal current 1, 2, 3
B020
Data
Function/Description
00
Reduced torque
01
Constant torque
02
Free-setting
Trip
time (s)
60
0.5
0
Hz
60
Trip
time (s)
60
0.5
Hz
0
60
Description
Data point coordinates for Hz axis
(horizontal) in the free-form curve
Data point coordinates for Ampere
axis (vertical) in the free-form curve
42.7 55.2
73.6
92.8% 120%
160%
Reduced trip current at 20 Hz
47.8 62.1
82.8
104% 135%
180%
Reduced trip current at 2.5 Hz
Range
0 to 400Hz
0.0 = (disable)
0.1 to 1000.
A
A
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Troubleshooting
