Overheat Protection Of The Motor By The Inverter - Mitsubishi Electric FR-F740 EC Instruction Manual

Operation
4.4

Overheat protection of the motor by the inverter

Set this parameter when using a motor other than the Mitsubishi standard motor (SF-JR) and
Mitsubishi constant torque motor (SF-HRCA). Set the rated motor current in Pr. 9 "Electronic
thermal O/L relay" to protect the motor from overheat.
Pr. No. Name
9
Refer to appendix A for the rated inverter current value.
The minimum setting increments are 0.01A for the 01160 or less and 0.1A for the 01800 or
more.
Example
Change the Pr. 9 "Electronic thermal O/L relay" setting to 2.5A according to the motor rated
current.
Screen at powering on
The monitor display appears.
Press the PU/EXT key to choose the PU
operation mode.
Press the MODE key to choose the parameter
setting mode.
Turn the digital dial until P.9 (Pr. 9) appears.
Press the SET key to show the currently set value.
The setting 2.3A for 00023 appears.
Turn the digital dial clockwise to change the set
value to "2.5" (2.5A).
Press the SET key to set.
By turning the digital dial, you can read another parameter.
Press the SET key to show the setting again.
Press the SET key twice to show the next parameter.
Fig. 4-10: Setting of the electronic thermal O/L relay
FR-F700 EC
Rated inverter
Electronic thermal O/L
relay
output current
Operation
Overheat protection of the motor by the inverter
Initial Value Setting Range
01160 or less
01800 or more
Description
0–500A
Set the rated motor current.
0–3600A
Display
PU indication is lit.
The parameter number
read previously
appears.
Refer to appendix A
for the rated inverter
current value.
Flicker ... Parameter setting complete!
I001068E
4 - 15