Multifunctional adjustable electronic circuit breaker

The utility model relates to a multifunctional adjustable electronic circuit breaker, which is a device of security protection of a motor carried out by an electric power system in the electric technical field. Three load lines are penetrated through current transformers LH1, LH2 and LH3. Phase loss...

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Bibliographic Details
Main Authors HAIBIN ZHU, YANCHAO NI
Format Patent
LanguageEnglish
Published 09.06.1999
Edition6
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:The utility model relates to a multifunctional adjustable electronic circuit breaker, which is a device of security protection of a motor carried out by an electric power system in the electric technical field. Three load lines are penetrated through current transformers LH1, LH2 and LH3. Phase loss signals and over current fault signals are taken samples and input into comparators IC2 and IC3. The switching-in and the switching-off of triodes T3 and T4 are used for controlling the switching of a relay J through IC4 or a non gate circuit. The switching of a breaker switch is driven to actualize protection for lines. RW1 is used for establishing a normal current magnitude. RW2 is 7 times the size of the normal current magnitude. The utility model adopts RW1 and RW2 as gang potentiometers to realize the effective protection of overload high current. LED is used for running indication. A power supply voltage, a setting current and a running load current are monitored through a transfer switch. The LCD is used for measurement display.
Bibliography:Application Number: CN1998213168U