Firing Type; Zero Crossing; Burst Firing - CD Automation REVEX 3PH RX3 120 Series User Manual

REVEX
3PH from 120A to 210A
13

Firing type

Choose a 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 Control Panel.
Caution: this procedure must be performed only by qualified persons.

13.1 Zero Crossing

ZC firing mode is used with Logic
Output from temperature controllers
and the Thyristor operates like a
contactor.
The Cycle time is performed by
temperature controller. ZC minimizes
interferences because the Thyristor
unit switches ON-OFF at zero voltage.

13.2 Burst Firing

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%. When
is specified 1 the firing type is Single
Cycle.
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=4.
ON OFF
Voltage Supply (V)
SSR from controller
ON OFF
Voltage Supply (V)
Load Voltage (V)
54
User's manual
Load Voltage (V)
25%
50%
75%
100%