CD Automation CD3000 E-3PH - Burst Firing (BF); Soft Start with Burst Firing (S+BF)

CD Automation srl CD3000E-3PH from 25A to 500A User’s Manual
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11.2 Burst Firing (BF)
The Burst Firing is similar to the Single Cycle, but consecutive cycles ON are selectable between 2 and
255, with input signal equal at 50%.
Burst Firing is a method zero crossing that it reduces the electromagnetic interferences because the
thyristor switches at zero voltage crossing.
The example show the Burst Firing with Burst cycles: P083  =4
VOLTAGE SUPPLY (V)
100%
ON OFF
LOAD VOLTAGE (V)
75%
50%
25%
11.2.1 Soft Start with Burst Firing (S+BF)
This is an additional function to the Burst Firing. The unit start in phase angle mode with a ramp starting
from zero up to the full tension in the cycles number set in the parameter P084 .
When the ramp is over, the thyristor unit will stay in conduction at full voltage up to the end of cycles of
burst. The S+BF firing is used to control small inductive loads to avoid inrush surge current and to
reduce the electromagnetic interferences.
The example show the firing with Burst cycles: P083  =4 and ramp cycles: P084  =3
VOLTAGE SUPPLY (V)
100%
ON OFF
LOAD VOLTAGE (V)
75%
50%
25%