CA2504525A1 - Ground fault circuit interrupter with enhanced radio frequency interference suppression - Google Patents

Ground fault circuit interrupter with enhanced radio frequency interference suppression Download PDF

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Publication number
CA2504525A1
CA2504525A1 CA002504525A CA2504525A CA2504525A1 CA 2504525 A1 CA2504525 A1 CA 2504525A1 CA 002504525 A CA002504525 A CA 002504525A CA 2504525 A CA2504525 A CA 2504525A CA 2504525 A1 CA2504525 A1 CA 2504525A1
Authority
CA
Canada
Prior art keywords
circuit interrupter
fault circuit
ground fault
ground
interrupter device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002504525A
Other languages
French (fr)
Other versions
CA2504525C (en
Inventor
David Y. Chan
Eugene Shafir
John Libretto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leviton Manufacturing Co Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2504525A1 publication Critical patent/CA2504525A1/en
Application granted granted Critical
Publication of CA2504525C publication Critical patent/CA2504525C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

A ground fault circuit interrupter device having a feedthrough capacitor for substantially reducing interference from radio frequency signals such as those emitted from cell phones. The ground fault circuit interrupter device includes a printed circuit board having a system ground terminal and a detection terminal for receiving a fault detection signal. A chip is provided having a ground pin connected to the system ground terminal and an input pin for receiving the fault detection signal. The feedthrough capacitor has a through conductor connected between the input pin and the detection terminal and a capacitor coupled between the through conductor and the system ground terminal.

Claims (6)

1. A ground fault circuit interrupter device comprising:

a printed circuit board having a system ground terminal and a detection terminal for receiving a fault detection signal;

a chip having a ground pin connected to the system ground terminal and an input pin for receiving the fault detection signal; and a feedthrough capacitor having a through conductor connected between the input pin and the detection terminal and a capacitor coupled between the through conductor and the system ground terminal.
2. The ground fault circuit interrupter device of claim 1 wherein the input pin is connected to an input of an operational amplifier.
3. The ground fault circuit interrupter device of claim 1 wherein the feedthrough capacitor has attenuation characteristics that increase at approximately 20 decibels per decade from its cutoff frequency.
4. The ground fault circuit interrupter device of claim 1 wherein the feedthrough capacitor has a cutoff frequency selected from a band of frequencies between 1 to 300,000 megahertz.
5. The ground fault circuit interrupter device of claim 1 wherein the feedthrough capacitor has a cutoff frequency selected from a range of frequencies in the 850 megahertz band for cell phone service.
6. The ground fault circuit interrupter device of claim 1 wherein the feedthrough capacitor has a cutoff frequency selected from a range of frequencies in the 1850 megahertz band for cell phone service.
CA2504525A 2004-04-12 2005-04-12 Ground fault circuit interrupter with enhanced radio frequency interference suppression Active CA2504525C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US56141304P 2004-04-12 2004-04-12
US60/561,413 2004-04-12
US11/095,581 US7375935B2 (en) 2004-04-12 2005-04-01 Ground fault circuit interrupter with enhanced radio frequency interference suppression
US11/095,581 2005-04-01

Publications (2)

Publication Number Publication Date
CA2504525A1 true CA2504525A1 (en) 2005-10-12
CA2504525C CA2504525C (en) 2012-10-30

Family

ID=35253766

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2504525A Active CA2504525C (en) 2004-04-12 2005-04-12 Ground fault circuit interrupter with enhanced radio frequency interference suppression

Country Status (3)

Country Link
US (2) US7375935B2 (en)
CA (1) CA2504525C (en)
MX (1) MXPA05003939A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7400477B2 (en) 1998-08-24 2008-07-15 Leviton Manufacturing Co., Inc. Method of distribution of a circuit interrupting device with reset lockout and reverse wiring protection
ES2257152B1 (en) * 2004-05-31 2007-07-01 Laboratorios Almirall S.A. COMBINATIONS THAT INCLUDE ANTIMUSCARINIC AGENTS AND BETA-ADRENERGIC AGONISTS.
CN101218729B (en) * 2005-06-01 2010-06-16 立维腾制造有限公司 Circuit interrupting device having integrated enhanced RFI suppression
US7684162B2 (en) * 2007-03-21 2010-03-23 Magnetic Metals Corporation Leakage current protection device
US8139328B2 (en) * 2007-05-17 2012-03-20 Levitron Manufacturing Company, Inc. Fault circuit interrupting device with symmetrical inputs
US7889466B2 (en) * 2008-05-02 2011-02-15 Leviton Manufacturing Company, Inc. Fault circuit interrupter with bi-directional sensing
US9774181B2 (en) 2012-03-16 2017-09-26 Hubbell Incorporated Enhanced auto-monitoring circuit and method for an electrical device
US8830015B2 (en) 2012-03-16 2014-09-09 Hubbell Incorporated Compact latching mechanism for switched electrical device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845403A (en) * 1972-12-27 1974-10-29 Rca Corp Amplifier for amplitude modulated waves with means for improving sideband response
US3961263A (en) * 1974-06-03 1976-06-01 Rca Corporation Bandstart detector system for a television tuning system
DE2456088A1 (en) * 1974-11-27 1976-08-12 Siemens Ag ELECTRIC DOUBLE RESTORING CAPACITOR
US4148003A (en) * 1977-07-08 1979-04-03 Globe-Union Inc. Series feed-through capacitor
US5969921A (en) * 1998-01-29 1999-10-19 Eaton Corporation Ground fault electrical switching apparatus for coordinating tripping with a downstream ground fault switch
US6424234B1 (en) * 1998-09-18 2002-07-23 Greatbatch-Sierra, Inc. Electromagnetic interference (emi) filter and process for providing electromagnetic compatibility of an electronic device while in the presence of an electromagnetic emitter operating at the same frequency
US6807036B2 (en) * 2001-04-26 2004-10-19 Hubbell Incorporated Digital fault interrupter with self-testing capabilities
US20030081370A1 (en) * 2001-10-15 2003-05-01 Haskell Donald K. Apparatus and process for the control of electromagnetic fields on the surface of EMI filter capacitors

Also Published As

Publication number Publication date
CA2504525C (en) 2012-10-30
USRE42866E1 (en) 2011-10-25
MXPA05003939A (en) 2006-05-25
US7375935B2 (en) 2008-05-20
US20060018061A1 (en) 2006-01-26

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