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Rated current AC51
non-inductive or slightly inductive loads, resistance furnaces
Thermic Dissipation
Rated current AC56A permitted trigger modes:
ZC, BF con DT (Delay Triggering), PA with softstart
Overcurrent Fault Protection function
Safety
Selection of °C/°F
Linear scale range
Control actions
PID parameters: pb-dt-it
Action – control outputs
Max limit heat/cool power
Fault power setting
Shutdown function
Configurable alarms
Alarm masking
Energy calculation
Options
Diagnostics
46
GFW 40
Nominal current 40Arms @40°C in continuous service
GFW 60
Nominal current 60Arms @40°C in continuous service
GFW 100
Nominal current 100Arms @40°C in continuous service
NOTE (for all models)
Minimum load controllable: 5 % of product current rated level.
GFW models dissipate thermic power based on load current:
Pdissipation = I_load_Arms * 2.8V (W)
Derating: 20% of rated current value.
This option 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.
FUNCTION
Detection of short circuit or opening of inputs, absence of input
feed, LBA alarm, HB alarm
Configurable
-1999...9999
1 control loops:
Double action (heat/cool) PID, on-off
Self-tuning at start, continuous Autotuning, one-shot Autotuning
0,0...999,9 % – 0,00...99,99 min – 0,00...99,99 min
heat/cool – ON/OFF, PWM, GTT
0,0...100,0 %
-100,0...100,0 %
Maintains sampling of PV; maintains control off
The alarm is assignable to an output and configurable as:
maximum, minimum, symmetrical, absolute/deviation, LBA, HB
Exclusion at power-on, latch, reset from digital input
Totalizer of energy value supplied to load with local display by
terminal and remote acquisition from fieldbus. Counters can be
reset.
OPTIONS
- Timed Soft-Start firing ramp, with or without peak current
control
- Soft-Start firing ramp, specific for infrared lamps
- Timed shut-off ramp
- Limitation of RMS current in load
- 0-90° Delay-Triggering for firing inductive loads in ZC and BF
mode
- SSR in short circuit (presence of current with OFF control)
- No linear voltage
- Fan supply power missing
- No current due to open SSR/interrupted load
• Overheat alarm (of power modules, of clamps for power
cables)
Current reading
• Allarme HB carico interrotto o parzialmente interrotto
• Calibration procedure using automatic threshold
HB alarm from the value of the load current
• Alarm load short circuit or overload
Voltage reading
• Input phase unbalanced
• Wrong phase rotation in three-phase load configuration
80993B_MHW_GFW-Xtra_06-2018_ENG
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