Parameter Description
5.6 Electronic Thermal Relay Capacity (P.9)
P.9 “Electronic thermal relay capacity”
Related parameters
P.80~P.84, P.86,P.126, P.550
“Multi-function terminals selection”
● The “electronic thermal relay” uses the program of the inverter to simulate a thermal relay
for preventing the motor from overheating.
Parameter Factory setting Setting range Remarks
9
(Refer to note 1 in
(Refer to note 5 in
---
<Setting>
• Please set P.9 as the rated current of the motor at its rated frequency. The rated frequency
of a squirrel-cage inductive motor made in different countries and areas is different. Please
refer to the nameplate instruction on the motor.
• If P.9=0, the electronic thermal relay is disabled.
• In case the calculated heat by the electronic thermal relay exceeds the upper limit, an
alarm will go off and the DU01 screen will display
, and the output will be stopped.
Note: 1. After the inverter is reset; the thermal accumulating record of the electronic thermal relay will be
reset to zero. Please pay attention in this area.
2. When two or more motors are connected to the inverter, they cannot be protected by the
electronic thermal relay. Install an external thermal relay for each motor.
3. When a special motor is employed, the electronic thermal relay is no longer valid. Install an
external thermal relay for each motor.
4. About wiring for an external thermal relay, please refer to P.8 0~P.84、P.86、P.1 26、P.550.
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