LS ELECTRIC SV-iS7 Series, User Manual

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Using Protection Features
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10 Using Protection Features
Protection features provided by the SV-iS7 series inverter are categorized into two types:
Protection from damage due to an overheating motor and Protection against inverter
malfunction.
10.1 Motor Protection
10.1.1 Electrothermal Motor Overheating Prevention (ETH)
ETH is a protective function that uses the output current of an inverter without a separate
temperature sensor to predict increases in motor temperature and protect the motor, based
on its heat characteristics.
Group Code LCD Display Parameter Setting Setting Range Unit
PRT
40 ETH Trip Sel 0 None None/Free-Run/Dec -
41 Motor Cooling 0 Self-cool - -
42 ETH 1min - 150 120-200 %
43 ETH Cont - 120 50 – 180 %
Electronic Thermal (ETH) Prevention Function Setting Details
Code Description
PRT-40 ETH Trip Sel
ETH can be selected to provide motor thermal protection. The LCD screen
displays
”E - Thermal.”
Setting Function
0 None The ETH function is not activated.
1 Free-Run
The inverter output is blocked. The motor coasts to a
halt (free-run).
2 Dec The inverter decelerates the motor to a stop.
PRT-41 Motor
Cooling
Select the drive mode of the cooling fan, attached to the motor.
Setting Function
0 Self-cool
As the cooling fan is connected to the motor axis, the
cooling effect varies based on motor speed. Most