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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 firing: 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 defines 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 flicker 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.
14
xd. 5
Trigger mode in
normal operation (*)
Phase angle PA
(Phase Angle)
Variable cycle time
ZC (zero crossing)
Slow
set:
0,1<CT<30,0 sec
+ 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
19
FU. t A
bF. C y
15
41
(t
80961F_MSW_GTF/GTF-Xtra_07-2018_ENG
POWER CONTROL
R/W
Enable trigger modes
Full wave
Variable cycle time
BF (Burst Firing)
Set: Ct = 0
HSC
(Half Single Cycle)
R/W
Max. limit of RMS current in normal op
R/W
Min. number of cycles in BF mode
Cycle time SCR output
R/W
(only for ZC mode)
Table of trigger modes
phased
Trigger mode in
Softstart
normal operation (*)
mode
0
NO
ZC/BF
1
YES
ZC/BF
2
NO
PA
3
YES
PA
4
NO
ZC/BF
5
YES
ZC/BF
6
NO
PA
7
YES
PA
8
NO
ZC/BF
9
YES
ZC/BF
10
NO
PA
11
YES
PA
12
NO
ZC/BF
13
YES
ZC/BF
14
NO
PA
15
YES
PA
16
NO
ZC/BF
17
YES
ZC/BF
18
NO
PA
19
YES
PA
20
NO
ZC/BF
21
YES
ZC/BF
22
NO
PA
23
YES
PA
24
NO
ZC/BF
25
YES
ZC/BF
26
NO
PA
27
YES
PA
28
NO
ZC/BF
29
YES
ZC/BF
30
NO
PA
31
YES
PA
Modello
25A
0.0 ...999,9 A
25,0 40,0
1 ...10
0.1 ...30,0 sec
RMS peak current control
BF
in normal
in softstart
operation
-
NO
NO
-
-
NO
NO
-
-
NO
NO
-
-
NO
NO
-
HSC
NO
NO
HSC
NO
NO
-
NO
NO
-
-
NO
NO
-
-
YES
NO
-
-
YES
NO
-
-
YES
NO
-
-
YES
NO
-
HSC
YES
NO
HSC
YES
NO
-
YES
NO
-
-
YES
NO
-
-
NO
YES
-
-
NO
YES
-
-
NO
YES
-
-
NO
YES
-
HSC
NO
YES
HSC
NO
YES
-
NO
YES
-
-
NO
YES
-
-
YES
YES
-
-
YES
YES
-
-
YES
YES
-
-
YES
YES
-
HSC
YES
YES
HSC
YES
YES
-
YES
YES
-
-
YES
YES
-
40A
50A
60A
75A
90A
120A 150A 200A 250A
50,0
60,0
75,0
90,0 120,0 150,0 200,0 250,0
Setting to 0 to BF function
0
1
0
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