Current to power crossover heater control
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United States of America Patent
Stats
-
Feb 23, 1993
Grant Date -
N/A
app pub date -
Aug 28, 1991
filing date -
Aug 28, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control system which minimizes the start up time of heaters and sustains long term automatic control is provided. This control system automatically converts control time constant current to constant power when the power reaches the power set and provides that after power interruptions, control will revert back to constant current until constant power control is again called for. The heater controlled by the control system of this invention is preferably a subterranean heater having a long heating element.
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Family
International Classification(s)
Cited Art Landscape
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