Hitachi SJ300-037HFE 사용자 설명서
Using Intelligent Output Terminals
Oper
ations
a
nd Moni
tor
ing
4–56
The table below shows the settings and their meanings. Use the one that matches your load.
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.
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.
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.
motor gives the curves below. At 2.5 Hz, the output current is reduced by a factor of 0.9 for
given trip times.
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.
free-form curve defined by three data points, according to the table below.
Function Code
Data
Function/Description
B013 / B213 /B313
00
Reduced torque
01
Constant torque
02
Free-setting
Function
Code
Name
Description
Range
B015 /
B017 /
B017 /
B019
Free-setting electronic
thermal frequency 1, 2, 3
thermal frequency 1, 2, 3
Data point coordinates for Hz axis
(horizontal) in the free-form curve
(horizontal) in the free-form curve
0 to 400Hz
B016 /
B018 /
B018 /
B020
Free setting electronic
thermal current 1, 2, 3
thermal current 1, 2, 3
Data point coordinates for Ampere
axis (vertical) in the free-form curve
axis (vertical) in the free-form curve
0.0 = (disable)
0.1 to 1000.
Trip
time (s)
Reduced trip current at 20 Hz
Trip current
reduction
factor
x 1.0
x 0.8
x 0.6
0
5
20
60
Hz
A
60
0.5
0
73.6
42.7 55.2
92.8% 120%
160%
Trip
time (s)
Reduced trip current at 2.5 Hz
Trip current
reduction
factor
x 1.0
x 0.9
x 0.8
0
2.5
5
60
Hz
A
60
0.5
0
82.8
47.8 62.1
104% 135%
180%