gefran GTF User Manual

1980961F_MSW_GTF/GTF-Xtra_07-2018_ENG
FUSE_OPEN AND SHORT_CIRCUIT_CURRENT ALARMS
The FUSE_OPEN alarm trips when the internal high-speed fuse (optional) blows or, on GTF-Xtra models, when the
overcurrent protection device switches off.
The SHORT_CIRCUIT_CURRENT alarm trips when peak current on the load exceeds the maximum limit (corre-
sponding to twice the rating) during the softstart ramp or at first power-on (with softstart ramp disabled).
If configured (parameter Fr.n other than zero), the device restarts automatically in softstart for a maximum of
Fr.n attempts, beyond which it remains deactivated while awaiting manual reset with front panel key BUT or with the
control via serial (bit 16).
For GTF-Xtra models, the number of times the overcurrent protection device switches off is shown in FO.c1 and
FO.c2.
The FO count. c1 can be reset via the command via serial (bit17).
158
fr.n
R/W
Number of restarts in case of
FUSE_OPEN / SHORT_CIRCUIT_CURRENT
0
16
bit
RESET FUSE_OPEN /SHORT_
CIRCUIT_CURRENT ALARMS
R/W
OFF = -
ON = Reset FUSE_OPEN / SHORT_CIRCUIT_CURRENT alarms
Read state
115
R Status 2 (STATUS2) Status 2 table
OVERCURRENT FAULT PROTECTION
This function eliminates the need for an external extra-rapid fuse to protect the device. In case of load short-circuit,
the internal IGBT device is instantaneously switched off and the alarm status is signaled.
- The overcurrent fault protection function DOES NOT replace any of the safeties on the system (such as magne-
tothermic switches, delay fuses, etc.).
- These caracteristic protects the controller (and therefore also the load) by replacing the high-speed fuse needed
to protect the control SCRs against faults (without creating any additional cost to replace the fuse and reducing
machine downtime).
- The overcurrent fault protection has 2 function states:
- Normal (On-Off control of load power)
- Fuse-Open: GTF is open (a short occurred during normal operation).
17
bit
RESETTING
f0.cI
R/W
OFF = -
ON = Reset count FO.c1
159
f0.cI
R Counter 1: FUSE_OPEN events
160
f0.c2
R Counter 2: FUSE_OPEN events

gefran GTF Specifications

General

Brand	gefran
Model	GTF
Category	Controller
Language	English