US 6,552,884 B2Granted

Circuit breaker with display function

AssigneeHuman El-Tech, Inc.

InventorsJeong-Wan Kim, Cheon-Youn Kim, Dong-Sub Kim, Gi-Jong Ban

Life of this patent

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Abstract

A circuit breaker which displays electronically state of the circuit breaker and the cause of the disconnection which enables users to determine whether to reconnect a conductor which connects a source and a load in power distribution system. An arc display part is coupled to an arc fault detector, a ground display part is coupled to a ground fault detector and an overload display part is coupled to an overload detector. If arc fault occurs, the arc fault detector generates a trip signal and the trip signal is provided to the arc display part. As the trip signal from the arc fault detector is not provided to the ground display part and the overload display part, users can determine that arc fault has occurred by the lighting of the arc display part.

Claims17

Dependent claims

A circuit breaker for use in an electric power distribution system, comprising

at least one of an arc fault detector, a ground fault detector, and an overload detector, the at least one of an arc fault detector, a ground fault detector, and a overload detector disconnecting a conductor coupling a system power source and a load if the at least one of the arc fault detector, the ground fault detector and the overload detector generates a trip signal
means for displaying the state of the circuit breaker and the cause of the disconnection if the conductor is disconnected by the trip signal generated by said at least one of an arc fault detector, a ground fault detector and an overload detector, so as to provide a user with information as to whether the cause of the disconnection is or is not an arc fault;
means for resetting said means for displaying if the disconnected conductor is reconnected;
an independent power source for driving said means for displaying;
and
switching means for switching a connection between said independent source and said means for displaying so that said independent power source drives said means for displaying only when the trip signal is generated.

3 more elements

A circuit breaker comprising at least one of an arc fault detector, a ground fault detector, and an overload detector, said at least one of an arc fault detector, a ground fault detector, and a overload detector disconnecting a conductor coupling a first power source and a load if the at least one of the arc fault detector, the ground fault detector and the overload detector generates a trip signal, further comprising:

means for alarming a state of the circuit breaker and a cause of a disconnection by sound if the conductor is disconnected by the trip signal generated by the at least one of the arc fault detector, the ground fault detector and the overload detector, so as to notify a user whether or not a cause of the disconnection is an arc fault;
means for resetting said means for alarming if the disconnected conductor is reconnected;
a second power source, independent of the first power source, for driving said means for alarming, and
means for switching the independent power source and the means for alarming so that the independent power source provides power to the means for alarming only when the trip signal is generated.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/014,815Filed 14 Dec 2001 · continuation in part
Priority: KR 2000-002538512 May 2000
Published: US 2002/0008950 A14 Jul 2002
Granted: 22 Apr 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H02H 1/0015
Concerning the detecting means: using arc detectors
H02H 3/04
Details: with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
H02H
Emergency protective circuit arrangements

Family

Application09/852,117Parent of this continuation-in-part · filed 10 May 2001
US 2002/0085326 A1Pre-grant publication · published 4 Jul 2002
US 2002/0008950 A1Published application
US 6,532,139 B2Related patent
US 6,552,884 B2This patent

From the US filing history. Foreign family members aren’t listed.