gefran GTF Plus Installation And Operation Manual page 32

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
(*) (Only for GTF standard, without electrical fuse)
Options
Diagnostic
32
5 • TECHNICAL CHARACTERISTICS
POWER (SOLID-STATE)
AC 51 resistive or low inductance loads
AC 55b infrared lamps
AC 56a: transformer primary in single-phase or open configuration only)
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
12A
400A
A²s (*) 450
1000V/μsec
4KV
5KA
FUNCTION
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
(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
MODEL GTF
40 50 60 75
40A 50A 60A 75A
20A 25A 30A 37A
520A 520A 1150A 1150A
1800 1800 6600 6600
OPTIONS
impedance.
90 120 150 200
90A 120A 150A 200A
45A 60A 75A 100A
1500A 1500A 5000A 8000A
11200 11200 12500 320000 320000
80960_MHW_GTF_01-2012_ENG
250
250A
125A
8000A