Automatic reset current cut-off for an electrostatic precipitato

Details Automatic reset current cut-off for an electrostatic precipitato Automatic reset current cut-off for an electrostatic precipitato

1980-10-30

1982-06-15

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

55105, 323903, 363 21, 363 28, 361 92, H02H 324

Patent

active

043354149

ABSTRACT:
An automatic electronic reset current cut-off protection circuit for electrostatic precipitator air cleaner power supplies of the type utilizing a ferroresonant transformer having a primary winding, a secondary winding for producing relatively high voltage and a tertiary winding for producing a relatively low voltage. The circuit operates to inhibit power supply operation in the event of an overload in the ionizer or collector cell by sensing a voltage derived from the high voltage and comparing the sense voltage with a fixed reference. When the sense voltage falls below a predetermined value, current through the transformer primary is inhibited for a predetermined time. Current flow is automatically reinstated and the circuit will cyclically cause the power supply to shut down until the fault has cleared. The reference voltage is derived from the tertiary winding voltage resulting in increased sensitivity of the circuit to short duration overload conditions.

REFERENCES:
patent: 3599082 (1971-08-01), Besier
patent: 4061961 (1977-12-01), Baker
patent: 4156885 (1979-05-01), Baker et al.

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