74
REVO C
2PH from 60A to 800A - 690V
User’s manual
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.
14.1 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.
14.2 Burst Firing
The Burst Firing is similar to the Single Cycle, but consecutive cycles ON are selectable between 1 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.
14
Voltage Supply (V)
Load Voltage (V)
SSR from controller
ON
OFF
25%
50%
75%
100%
Voltage Supply (V)
Load Voltage (V)
ON
OFF
Summary of Contents for REVO C 2PH 690V
Page 2: ......
