Humidifier controller having multiple-phase electrode...

Details Humidifier controller having multiple-phase electrode... Humidifier controller having multiple-phase electrode...

H - Electricity

05

B

309/35

H05B 1/02 (2006.01) F22B 1/30 (2006.01) G05D 22/02 (2006.01)

Patent

CA 1260996

ABSTRACT OF THE DISCLOSURE A controller for controlling an electrode boiler steam humidifier, of the type operable from a source of polyphase alternating current, is provided. A plurality of current loop transformers, coupled to the boiler electrodes, sense the individual currents drawn in each phase of the polyphase alternating current. A plurality of full-wave bridge rectifiers individually couple the secondaries of the current lube transformers to the input of a voltage amplifier such that the output of the amplifier is indicative of the highest of the currents sensed in each phase of the boiler electrode current. When the output of the voltage amplifier exceeds a predetermined threshhold, a control effect is produced such that operation of the humidifier is controlled in accordance with the highest of the individual phase currents drawn through each of the boiler electrodes.

515402

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