6 - 51
6 Basic Parameter Settings
High-function General-purpose Inverter RX2 Series User’s Manual
6-6
Th
er
m
al Protectio
n o
f M
ot
or (
Ele
ctron
ic Th
ermal)
6
6-
6-1 Electr
onic
The
rmal Setting
Constant Torque Characteristics [bC111]=01
Use this setting to use the constant-torque motor
(Ex.3) For induction motor rated current: 64A, [bC110]=64(A)
Base frequency [Hb104]=50 Hz, output frequency =5 Hz
When the first electronic thermal level [bC110] is 64 A, the reduction ratio is ×1.0 for operations at a
base frequency of 50 Hz and output frequency of 5 Hz and the electronic thermal time-limited char-
acteristics are given in the lower part of Example 3.
Since Example 1 shows the case of the reduction ratio ×1, a trip occurs in 60 seconds when an elec-
tric current of 150% ×1 of the motor rated current flows continuously. The performance in the exam-
ple 3 is the same as the one in the example 1.
Free Settings [bC111]=02
To protect the motor, the electronic thermal characteristics can be freely set in accordance with the
load.
X1.0
0
50
0
60
Inverter
Output frequency (Hz)
Base frequency
Reduction ratio
70.4
(110%)
96
(150%)
128
(200%)
60
3
0
×1
Trip time (s)
Motor current (A)
(Ratio to motor rated current)
Summary of Contents for RX - 2
Page 1: ...High function General purpose Inverter RX2 Series User s Manual I620 E1 01 3G3RX2...
Page 54: ...1 Overview 1 22 High function General purpose Inverter RX2 Series User s Manual...
Page 136: ...2 Design 2 82 High function General purpose Inverter RX2 Series User s Manual...
Page 592: ...8 Applied Settings 8 192 High function General purpose Inverter RX2 Series User s Manual...
Page 754: ...11 Options 11 56 High function General purpose Inverter RX2 Series User s Manual...
Page 794: ...12 Troubleshooting 12 40 High function General purpose Inverter RX2 Series User s Manual...
Page 919: ......
