46
4. Parameter description
Parameter
4.6
Electronic Thermal Relay Capacity (P.9)
P.9 “Electronic thermal relay capacity”
Related parameters
P.80~P.84, P.86
“
Multi-function terminals selection
”
● The ‘electronic thermal relay’ employed the built-in program to simulate a thermal relay to prevent
the motor from overheating.
Parameter
Factory setting
Setting range
Remarks
9
Rated output current
(refer to the note of appendix 1)
0~500A
---
<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 that made in different countries and areas is different. Please refer to
the nameplate instruction of 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 be
output (at this time, the alarm lamp will be lit.), the screen of DU03B 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. Attention should be paid attention to it.
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 to each motor.
3. When a special motor is employed, the electronic thermal relay is no longer valid. Install an external
thermal relay to each motor.
4. About wiring for an external thermal relay, refer to P.80~P.84, P.86.
4.7
DC Injection Brake (P.10, P.11, P.12)
P.10 “DC injection brake operation frequency”
P.11 “DC injection brake operation time”
P.12 “DC injection brake operation voltage”
Parameter
Factory setting
Setting range
Remarks
10
3Hz
0~120Hz (Note 2)
---
11
0.5s
0~60s
---
12
4%
0~30%
---
