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CATEGORY OF USE
(Tab. 2 EN60947-4-3)
Trigger mode
Feedback mode
Max rated voltage
Work voltage range
Non-repetitive voltage
Rated frequency
Rated current AC51 -AC55b
non-inductive or slightly inductive
loads, IR lamps (@ Tamb = 40°C)
Rated current AC56A
permitted trigger modes: ZC, BF con DT
(Delay Triggering),PA with softstart (@ Tamb =40 °C)
Non-repetitive overcurrent (t=10msec)
I²t for melting (t=1...10msec)
Critical Dv/dt with output deactivated
Held nominal voltage of on the impulse
Nominal current for short circuit condition
Diagnostics
Options
Diagnostic
Power supply
Power supply external fan
(only for GTF120A model)
Signals
80960G_MHW_GTF_05-2019_ENG
POWER (SOLID-STATE)
AC 51 resistive or low inductance loads
AC 55b infrared lamps
AC 56a: transformer
PA - Load management by adjusting the firing angle (only configuration single-phase
or delta open)
ZC - Zero Crossing with constant cycle time (settable in range 1-200sec)
BF - Burst Firing with variable cycle time (GTT) optimized minimum.
HSC - Half Single Cycle corresponds to Burst Firing that includes ON and
OFF half-cycles.
Useful for reducing flicker with short-wave IR loads (applied only to
single-phase resistive or 3-phase 6-wire open delta loads).
V, V2: Voltage feedback proportional to RMS voltage value on load
I, I2: Current feedback: bound to RMS current value on load to
P:
480Vac
90...530Vac
1200Vp
50/60Hz auto-determination
25
25A
20A
400A
A²s
450
1000V/μsec
4KV
5KA
Detection of short load circuit absence line voltage,
HB alarm (partial breakage of load)
- 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
- SCR in short circuit (presence of current with OFF control)
- Absence of SCR current when under load.
- Overtemperature alarm
Current read
• HB alarm interrupted or partially interrupted load
• Automatic calibration of HB alarm setpoint starting from current value in load
• Alarm for load in short circuit or overcurrent
Voltage read
• No line voltage
GENERAL DATA
GTF 25-120A: 24 Vac 50-60 Hz / Vdc ± 25%, max 3VA
GTF 150-250A: 24 Vac 50-60 Hz / Vdc ± 25%, max 11VA
24 Vdc ± 10%, max 200mA
5 leds: RUN: run state of CPU
(useful to compensate possible variations in line voltage).
compensate variations in line voltage and/or variations in load
Power feedback: proportional to real power value on load (useful to keep
constant values of electrical power assigned regardless of load impedance
or line voltage variations).
600Vac
90...660Vac
1600Vp
40
50
60
75
40A
50A
60A
75A
32A
40A
50A
60A
520A
520A
1150A
1150A
1800
1800
6600
6600
FUNCTION
OPTIONS
STATUS: operating state
ALARM: state of alarm output
DIGITAL INPUT: state of digital inputs
ON / OVER-TEMP.: state control tirystor / Alarm for overheating
impedance.
690Vac
90...760Vac
1600Vp
MODEL GTF
90
120
150
90A
120A
150A
75A
100A
125A
1500A
1500A
5000A
11200
11200 125000 320000 320000
200
250
200A
250A
160A
200A
8000A
8000A
37
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