455-461 Series
Thyristor firing
mode
Position
of potentiometer P4
Fast cycle
Slow cycle
Single cycle
To minimum
(Minimum delay)
Firing angle variation
Soft start
Non-specified (short code)
To maximum
(Maximum ramp)
• Trigger delay time
Trigger delay time setting for the thyristor firing modes
- Single cycle
- Burst firing without soft start.
In the single cycle or fast or slow cycle modes, P4 sets the
delay of the first firing
of each
burst mode.
This delay can be adjusted between 0 and 90° and only acts on the first wave.
The maximum delay is obtained with P4 set completely to the right in the clockwise direction.
When it leaves the factory, P4 is set as shown in table 4.8.
Table 4.8
4-28
451-461 User Manual
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