gefran GFW-Xtra 40 Installation And Operation Manual page 37

Figure 48
parameter defines the minimum number of conduction cycles settable from 1 to 10.
In the following example, the parameter = 2.
HSC - Half single cycle
This mode corresponds to Burst Firing that manages ON and OFF half-cycles. It is useful for reducing the
flickering of filaments with short/medium-wave IR lamp loads. With these loads, to limit operating current with
low power, it is useful to set a minimum power limit (for example Lo.P = 10%, ref "GFX4-IR operation guide").
NB.: This mode is NOT allowed with inductive loads (transformers) It is used with resistive loads in single-
phase, star with neutral, or open delta configuration.
Figure 49
Phase angle (PA)
This mode controls power on the load via modulation of trigger angle q
if power to be transferred to the load is 100%, q = 180°
if power to be transferred to the load is 50%, q = 90°
Figure 50
Resistive load
80993B_MHW_GFW-Xtra_06-2018_ENG
Example of operation in HSC mode with power at 33 and 66%.
Inductive load
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