SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 10 Protective Functions
10-1
10.1 Protective Functions
The protective functions provided by the SV-iS7 series are broadly divided into two types. One is for overheat and
damage and the other is for protecting the inverter itself and preventing malfunction.
10.1.1 Motor protection
1) Electronic thermal (Preventing motor overheat)
The electronic thermal function is automatically predicting temperature rises using the inverter output current without
a temperature sensor and providing protection suited to the inverse time thermal characteristic of the motor.
Group Code No. Function Display Setting Display Setting Range Unit
PRT
40 ETH Trip Sel 0 Yes No/Yes -
41 Motor Cooling 0 Self-cool - -
42 ETH 1min - 150 120~200 %
43 ETH Cont - 120 50~180 %
PRT-40 ETH Trip Sel : You can select the inverter operation in case of electronic thermal protective operation. On the
keypad, the failure status is displayed as E-Thermal.
0 : None
The electronic thermal function is not active.
1 : Free-Run (Free Run)
The inverter output is blocked and the motor does free run.
2 : Dec (Deceleration)
Stop after deceleration.
PRT-41 Motor Cooling : selects the operating method of the cooling fan mounted on the motor.
0 : Self-cool
The cooling fan connected to the motor axis, the cooling effect varies according to the rotation speed. Most general
induction motors have such a structure.
1 : Forced-cool
This structure supplies separate power to the cooling fan. This applies to the load that should operate for a long time
at a low speed and the motor exclusively for the inverter has such a structure.
PRT-42 ETH 1min : inputs the amount of current that can flow continuously for a minute on the basis of the rated
current (BAS-13) of the motor.