BENSHAW RSi GM2 Series - Learning Protection Features; Motor Protection; Electronic Thermal Motor Overheating Prevention (ETH)

Learning Protection Features
154
GM2 Series VFD
890054-00-00
Learning Protection Features
Protection features provided by the GM2 series inverter are categorized into two types: Motor
Protection (Overload, Underload, Over Heat (ETH), Stall Prevention, etc.) and Inverter Protection
(Open Phase, Inverter Overload, Fan Fault, External Trip, etc.).
Motor Protection
Electronic Thermal Motor Overheating Prevention (ETH)
ETH is a thermal protective function that uses the output current of the inverter to predict a rise in
motor temperature without a separate temperature sensor. Protection of the motor is based on
current, time and speed. The inverter responds to an ETH fault based on the setting of parameter
Pr.40 (ETH Trip Selection).
Group
Code
Name
Setting
Setting
Range
Unit
Pr
40
Electronic thermal
prevention fault selection
0
None
0–2
-
41
Motor cooling fan type
0
Self-cool
-
-
42
Electronic thermal 1
minute rating
150
120–200
%
43
Electronic thermal
continuous rating
120
50–150
%
Electronic Thermal (ETH) Prevention Function Setting Details
Code and
Features
Description
Pr.40 ETH Trip Sel
ETH can be selected to provide motor thermal protection. Select 1
(Free-Run) or 2 (Dec) to activate the ETH function and to determine
the stop method when an ETH fault occurs. The display will show
“EtH”.
Configuration
Function
0
None
The ETH function is not activated.
1
Free-Run
The inverter output is blocked. The motor
coasts to a stop (free-run).
2
Dec
The inverter decelerates the motor to a stop.