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CATEGORY OF USE
(Tab. 2 EN60947-4-3)
Trigger mode
Feedback mode
Max rated voltage
Operating voltage range
Non-repetitive voltage
Rated frequency
Critical Dv/dt with output deactivated
Nominal impulse voltage
Nominal current for short circuit condition
Protection
Rated current AC51
non-inductive or slightly inductive loads, resistance furnaces
Thermal Dissipation
Rated current AC56A
permitted trigger modes:
ZC, BF con DT (Delay Triggering),
PA with softstart
80999D_MHW_GFW 400-600A_07-2020_ENG
POWER (SOLID-STATE RELAY)
AC 51
AC 55b short wave infrared lamps (SWIR)
AC 56a transformers, resistive loads with high temperature
PA - load control via adjustment of firing phase angle
ZC - Zero Crossing with constant cycle time (settable in range
1-200sec)
BF - Burst Firing with variable cycle time (GTT) optimized min.
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 calibrate each time you change feedback mode.)
V, V2 Voltage feedback: proportional to RMS voltage value on
load to compensate possible variations in line voltage.
I, I2 Current feedback: proportional to RMS current value on
load to compensate variations in line voltage and/or variations
in load impedance.
W Power feedback: proportional to real power value on load
to compensate variations in line voltage and/or variations in
load impedance. You have to calibrate each time you change
feedback mode.
480Vac to 600Vac or 690V
90...530Vac (models 480V)
90...660Vac (models 600V)
90...760Vac (models 690V)
1200Vp (models480V)
1600Vp (models 600V / 690V)
50/60Hz auto-determination
1000V/µsec
4KV
5KA
RC, extrarapid fuses for SCR
GFW 400
Nominal current 400Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 8000 A
I
t per fusione: 1.050.000A²s
2
GFW 500
Nominal current 500 Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 15.000 A
I
t per fusione: 320000 A²s
2
dV/dt critical: 1000V/μs
GFW 600
Nominal current 600Arms @ 50°C in continuous service
Non-repetitive overcurrent t=10ms: 15.000 A
I²t for blowout: 1.125.000 A²s
NOTE (all models)
Minimum load controllable: 5 % of product current rated level.
GFW models dissipate thermic power based on load current:
Pdissipation = I_load_Arms * 1.3V (W)
For models with integrated fuse, also consider dissipated
power at rated current shown on the fuse table GFW models
with electronic fuse (with internal IGBT)
Derating: 20% of rated current value.
resistive or low inductance loads
coefficient
47
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