Motor monitor switching system

Details Motor monitor switching system Motor monitor switching system

1990-04-05

1991-09-03

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

318490, 318434, H02H 7085

Patent

active

050457640

ABSTRACT:
A monitoring circuit connected between a motor and a motor reversing switch is shown and described. The monitoring circuit has a current transformer connected to the power line to be measured, two secondary variable monitoring circuits for measuring the actual current value of the motor, and actual value analyzers for controlling the monitoring circuits. One of the secondary variable monitoring circuits is switched on while the other is switched off.

REFERENCES:
patent: 3848160 (1974-11-01), Boothman et al.
patent: 3979720 (1976-09-01), Laas et al.
patent: 4199799 (1980-04-01), Ostenso et al.
patent: 4636961 (1987-01-01), Bauer
patent: 4682263 (1987-07-01), Gradnitzer et al.
patent: 4749920 (1988-06-01), Jaeger et al.
patent: 4864287 (1989-09-01), Kierstead

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