Protective Functions; Electronic Thermal - LG SV-iC5 Series Instruction Manual

12.

Protective functions

12.1

Electronic Thermal

Group LED display
Function group
F50
1
F51
F52
F53
Select F50 – [Electronic thermal select] to 1.
It activates when the motor is overheated (time-inverse). If current greater than set in F51 flows, inverter output is
turned off for the preset time in F51- [Electronic thermal level for 1 minute].
F51: Enter the value of max current that is capable of flowing to the motor continuously for one
minute. It is set in percent of motor rated current. The value cannot be set lower than F52.
F52: Enter the amount of current for continuous operation. Normally motor rated current is used. It
cannot be set greater than F51.
F53: For an inductance motor, cooling effects decrease when a motor is running at low speed. A
special motor is a motor that uses a separately powered cooling fan maximize cooling effect even in
low speed. Therefore, as the motor speed changes, the cooling do not change.
F53
Parameter Name
[Electronic thermal
select]
[Electronic thermal level for 1
minute]
[Electronic thermal level for
continuous]
[Motor type]
[Motor type]
Current for
continuous [%]
100
95
65
Set value
1
-
-
-
Standard motors having a cooling fan directly
0
connected to the shaft
Special motor that uses a separately powered cooling
1
fan.
H53 = 1
H53 = 2
20
12-1
12. Protective functions
Min/Max Factory
setting default
0/1 0
150
50/150
100
0/1 0
Freq [Hz]
60
SV-iC5
Unit
%
%