455-461 Series
Chapter 4. 455 AND 461 SERIES
POWER UNITS
4.1 M A I N FUNCTION PERFORMED
• Electrical power monitoring as a function of an analogue input signal.
• Thyristor firing mode:
- thyristor phase angle
- slow cycle ( c y c l e time 10 s at 50% power) and
fast cycle ( c y c l e time 800 ms at 50% power)
- (fast and slow) cycle with soft start in thyristor phase
angle
- (fast and slow) cycle with soft start and end in thyristor phase
angle.
• Application:
- loads with high temperature coefficient
- transformer primary circuits
- inductors.
4-2
451-461 User Manual
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