Firing Type; Phase Angle (Pa Pa); Soft Start With Phase Angle (S+Pa Past) - Honeywell HCL-1PH User Manual

16 Firing type

Choose an correct firing type allows to optimize the thyristor unit for the installed load.
The firing type has already configured in line with customer requirements that are defined in the Order
Code. The Order Code is written on the identification label.
However, if you wish to change the firing type you can use the software configurator or the ControlPanel
Fir parameter on Set menu.
Caution: this procedure must be performed only by qualified persons.
16.1 Phase Angle (PA
The Phase Angle firing allow the control of the power on the load, for this firing the thyristor can be in
conduction only for a part of the voltage cycle.
This part of the voltage cycle is adjustable in function of the input signal from 0 at 100%.
The PA firing is normally used for control the inductive loads, and is also possible control a primary of
transformer coupled with the cold resistances like: Superkanthal, Molybdenum, Platinum, Tungsten or
Quartz Lamp. The only disadvantage with phase angle is the possible generation of interferences that
however can be reduced with opportune filters.
ON OFF
16.2 Soft Start with Phase Angle (S+PA
This is an additional function to the Phase Angle. The firing angle of the thyristor increase or decrease
up to the final setpoint value.
The Soft start ramp is an important feature to reduce the inrush current with transformers during the
during the cycle of magnetization or with cold resistance that are near to the short circuit when they are
supplied.
Setpoint Ramp Up / Setpoint Ramp Down : ρΠ_υ
ON OFF
100%
0%
HCL-1PH
)
PA
VOLTAGE SUPPLY (V)
LOAD VOLTAGE (V)
VOLTAGE SUPPLY (V)
Setpoint Value (%)
Load voltage RMS (V)
Ramp Up
OUTPUT VOLTAGE (V)
36
)
PASt
Ramp Down
User's Manual
25%
50%
75%
100%