2380961F_MSW_GTF/GTF-Xtra_07-2018_ENG
POWER CONTROL
SSR CONTROL MODES
settings
The GTF has the following power control modes:
- PA modulation via variation of phase angle
- ZC, BF, HSC modulation via variation of number of conduction cycles with zero crossing trigger.
PA phase angle: this mode controls power on the load via modulation of the phase angle.
ZC zero crossing: this type of operation reduces EMC emissions. This mode controls power on the load via a series of conduction
ON and non conduction OFF cycles.
The cycle time is constant and can be set from 0,1 to 30,0 sec.
BF burst ring: this mode controls power on the load via a series of conduction ON and non conduction OFF cycles. The ratio
of the number of ON cycles to OFF cycles is proportional to the power value to be supplied to the load. The repeat period or
cycle time is kept to a minimum for each power value.
Parameter bF.Cy denes the minimum number of conduction cycles, settable from 1 to 10.
In case of 3-phase load without neutral or closed delta, BF.Cy >= 5 has to be set to ensure correct operation (balancing of current in the 3
loads).
HSC Half Single Cycle: this mode corresponds to a BF that includes ON and OFF half-cycles.
It is useful for reducing icker with short-wave IR loads (and is applied only to single-phase or 3-phase with neutral or open
delta loads). Start mode is set with parameter Hd.5
Control of maximum rms current (whose value is set in parameter Fu.tA) can always be enabled with parameter Hd.5 in every power-on mode.
In ZC or BF mode as well, limiting the rms current value corresponds to limiting the maximum conduction angle.
+ 32 only for ZC/BF modes: enable delay triggering
+ 64 linear phase Softstart in power
+128 phase Softstart for IR lamps
+ 256 phase Softstart for shutdown in software ON/OFF switching
Trigger mode in
normal operation (*)
Phase angle PA
(Phase Angle)
Full wave
Variable cycle time
ZC (zero crossing)
Variable cycle time
BF (Burst Firing)
Set: Ct = 0
Slow
set:
0,1<CT<30,0 sec
HSC
(Half Single Cycle)
14
xd.5
R/W
Enable trigger modes
0
Table of trigger modes
phased
Softstart
Trigger mode in
normal operation (*)
BF
mode
RMS peak current control
in softstart
in normal
operation
0 NO ZC/BF
-- NO NO
1 YES ZC/BF
-- NO NO
2 NO PA
-- NO NO
3 YES PA
-- NO NO
4 NO ZC/BF HSC NO NO
5 YES ZC/BF HSC NO NO
6 NO PA
-- NO NO
7 YES PA
-- NO NO
8 NO ZC/BF
-- YES NO
9 YES ZC/BF
-- YES NO
10 NO PA
-- YES NO
11 YES PA
-- YES NO
12 NO ZC/BF HSC YES NO
13 YES ZC/BF HSC YES NO
14 NO PA
-- YES NO
15 YES PA
-- YES NO
16 NO ZC/BF
-- NO YES
17 YES ZC/BF
-- NO YES
18 NO PA
-- NO YES
19 YES PA
-- NO YES
20 NO ZC/BF HSC NO YES
21 YES ZC/BF HSC NO YES
22 NO PA
-- NO YES
23 YES PA
-- NO YES
24 NO ZC/BF
-- YES YES
25 YES ZC/BF
-- YES YES
26 NO PA
-- YES YES
27 YES PA
-- YES YES
28 NO ZC/BF HSC YES YES
29 YES ZC/BF HSC YES YES
30 NO PA
-- YES YES
31 YES PA
-- YES YES
19
FU.tA
R/W
Max. limit of RMS current in normal op
0.0 ...999,9 A
15
bF.Cy
R/W
Min. number of cycles in BF mode
1 ...10
1
41
(t
R/W
Cycle time SCR output
(only for ZC mode)
0.1 ...30,0 sec
0
Setting to 0 to BF function
Modello 25A 40A 50A 60A 75A 90A 120A 150A 200A 250A
25,0 40,0 50,0 60,0 75,0 90,0 120,0 150,0 200,0 250,0
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