Heater Power Regulator

Digital Type(SPR-D Series)

D. Typical SCR firing methods for the heater loads

Heater Load

Firing Method

Remarks

Constant
Resistive Load

Nichrome, Kanthal,
Calrod, Ceramic,
Catridge,mmersion
Infrared(long,medium)

Zero-Crossing

Phase Angle Control

Load resistance does not
change with temperature.

Variable
Resistive Load

T-3 Lamp(Halogen),
Quartz Lamp,Super Kanthal
Infrared(short wave),
Molybdenum,Graphite

Phase Angle+Zero-
Crossing

Phase Angle Control

Load resistance changes
temperature.

Silicon-Carbide

Silicon-Carbide

Phase Angle Control

 

Inductive
Load

Transformer-Coupled

Phase Angle
Control

Inductive Load

 

 


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