gefran GTF-Xtra Installation And Operation Manual page 28

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)
Overcurrent Fault Protection function
Critical Dv/dt with output deactivated
Held nominal voltage of on the impulse
Breaking
Diagnostics
Options
Diagnostic
Power supply
Power supply external fan
(only for 40, 50,60A model)
Signals
Load type and connection
28
POWER (SOLID-STATE)
AC 51 resistive or low inductance loads
AC 55b short wave infrared lamp (SWIR)
AC 56a: single-phase transformers (not allowed , for application consult Gefran)
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
(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
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).
480Vac
90...530Vac
1200Vp
50/60Hz auto-determination
25
25A
20A
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.
1000V/μsec
4KV
5KA/480V Warning: Maximum permissible inductance loop impedance 500 uH
FUNCTION
Detection of short load circuit
absence line voltage, HB alarm (partial breakage of load)
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)
- Absence of SSR 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 25-60A: 24 Vac 50-60 Hz / Vdc ± 25%, max 3VA
24 Vdc ± 10%, max 200mA
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
Single phase load
Independent single-phase load in open delta
3-phase load
3-phase load (star without neutral or closed triangle) with bi-phase control
MODEL GTF
40 50
40A 50A
32A 40A
80994B_MHW_GTF-Xtra_05-2016_ENG
impedance.
60
60A
50A