Learning Protection Features
GM2 Series VFD
169
890054-00-00
Under Load Fault and Warning
The inverter can be set to monitor and trip if needed, when low motor current conditions exist
during operation. This will protect against pump cavitation, deadhead and dry running operating
conditions. Set Pr.27, Under load fault selection to Free-Run or Decelerate to enable the protection.
Current detection levels are set with Pr.29 and Pr.30.
Eith
er Relay1 or Relay2 (OU.31 or OU.33) can
be set to 7 (Under Load) to provide an output signal.
Group Code
Name
Setting
Setting Range
Unit
Pr
04 Load level setting 0 Normal Duty
-
-
25 Under load
warning selection 1 Yes
0
–
1
-
26 Under load
warning time
10.0
0
–
600
sec
27 Under load fault
selection
1 Free-Run
-
-
28 Under load fault
time
30.0
0
–
600
sec
29 Under load lower
limit level
30
10
–
100
%
30 Under load upper
limit level
30
10
–
100
%
OU
31
Multi-function
(digital) relay1
item
7
Under Load
0 - 44
-
33
Multi-function
(digital) relay2
item
Under Load Trip and Warning Setting Details
Code and
Features
Description
Pr.27 UL Trip Sel
Sets the inverter reaction to an under load condition. If set to 0
(None), underload is not monitored. If set to 1 (Free-Run), the output
is blocked and the motor coasts to a stop. If set to 2 (Dec), the motor
decelerates, then stops.
Pr.25 UL Warn Sel
To activate an under load warning, set to 1 (Yes) and set one of the
relay outputs, Relay1 or Relay2 (OU.31 or OU.33) to 7(UnderLoad).
Pr.26 UL Warn
Time,
Pr.28 UL Trip Time
Delay times can be set to provide a warning signal (via the output
relays) after the time set in Pr.26, UL Warn Time and a trip after the
time set in Pr.28, UL Trip Time. This function does not operate if
energy-saving operation is activated at Ad.50 (E-Save Mode).
Содержание RSi GM2 Series
Страница 2: ...ii...
Страница 58: ...48 GM2 Series VFD Perform Basic Operations 890054 00 00...
Страница 122: ...Learning Advanced Features 112 890054 00 00 GM2 Series VFD PID control block diagram...
Страница 188: ...Learning Protection Features 178 GM2 Series VFD 890054 00 00...
Страница 279: ...Technical Specification 269 890054 00 00 GM2 Series VFD...