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80960G_MHW_GTF_05-2019_ENG
POWER (SOLID-STATE)
CATEGORY OF USE
(Tab. 2 EN60947-4-3)
AC 51 resistive or low inductance loads
AC 55b infrared lamps
AC 56a: transformer
Trigger mode
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).
Feedback mode
V, V2: Voltage feedback proportional to RMS voltage value on load
(useful to compensate possible variations in line voltage).
I, I2: Current feedback: bound to RMS current value on load to
compensate variations in line voltage and/or variations in load impedance
.
P: 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).
Max rated voltage
480Vac
600Vac
690Vac
Work voltage range
90…530Vac
90…660Vac
90…760Vac
Non-repetitive voltage
1200Vp
1600Vp
1600Vp
Rated frequency
50/60Hz auto-determination
Rated current AC51 -AC55b
non-inductive or slightly inductive
loads, IR lamps (@ Tamb = 40°C)
MODEL GTF
25 40
50
60
75
90
120
150
200
250
25A 40A
50A
60A
75A
90A
120A
150A
200A
250A
Rated current AC56A
permitted trigger modes: ZC, BF con DT
(Delay Triggering),PA with softstart (@ Tamb =40 °C)
20A 32A
40A
50A
60A
75A
100A
125A
160A
200A
Non-repetitive overcurrent (t=10msec)
400A 520A
520A 1150A 1150A 1500A 1500A 5000A 8000A 8000A
I²t for melting (t=1…10msec) A²s
450
1800
1800
6600
6600
11200 11200 125000 320000 320000
Critical Dv/dt with output deactivated
1000V/μsec
Held nominal voltage of on the impulse
4KV
Nominal current for short circuit condition
5KA
FUNCTION
Diagnostics
Detection of short load circuit absence line voltage,
HB alarm (partial breakage of load)
OPTIONS
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
Diagnostic
- 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
Power supply
GTF 25-120A: 24 Vac 50-60 Hz / Vdc ± 25%, max 3VA
GTF 150-250A: 24 Vac 50-60 Hz / Vdc ± 25%, max 11VA
Power supply external fan
(only for GTF120A model)
24 Vdc ± 10%, max 200mA
Signals
5 leds: RUN: run state of CPU
STATUS: operating state
ALARM: state of alarm output
DIGITAL INPUT: state of digital inputs
ON / OVER-TEMP.: state control tirystor / Alarm for overheating