Phase Angle ( Pa) - Honeywell CD3000M-1ph User Manual

User's Manual
NO DELAY
V
ϕ
CURRENT (I)
VOLTAGE (V)
V
CD3000M-1PH up to 110A
WITH DELAY
I
∆t
t
LINE VOLTAGE
T
LOAD SUPPLY
T
7.5 Delay Triggering+Burst
Firing (DT + BF)
It's used to switch ON-OFF primary of
transformer coupled with resistive load on
secondary. It's used to prevent inrush surge
CURRENT (I)
current when zero voltage switching is used
VOLTAGE (V)
and to avoid fuse blowing. Every time that
t
auxiliary voltage supply of PCB board is
switched ON, the unit starts in phase angle
for 1 sec., after witch it switches OFF when
the supply waveform is negative and starts
again when is positive, giving a delay on
triggering signal on first halt positive cycle. If
circuit board is maintained under voltage
phase angle start is not used.

7.6 Phase Angle ( PA)

With Phase Angle is possible to control the
power to the load allowing to Thyristor to be
in conduction for a variable part of the
voltage supply halt cycle. The load power can
be adjusted from 0 to 100% as a function of
analog input signal, normally delivered by
temperature controller or by potentiometer.
Normal it's used with inductive loads. The
only disadvantage with phase angle is the
generation of interferences that can be
reduced with filters.
29
Honeywell
www.honeywell.com/imc