WO2018188364A1 - Circuit de protection contre les fuites électromagnétiques - Google Patents

Circuit de protection contre les fuites électromagnétiques Download PDF

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Publication number
WO2018188364A1
WO2018188364A1 PCT/CN2017/115426 CN2017115426W WO2018188364A1 WO 2018188364 A1 WO2018188364 A1 WO 2018188364A1 CN 2017115426 W CN2017115426 W CN 2017115426W WO 2018188364 A1 WO2018188364 A1 WO 2018188364A1
Authority
WO
WIPO (PCT)
Prior art keywords
leakage
zero
switch
protection circuit
output interface
Prior art date
Application number
PCT/CN2017/115426
Other languages
English (en)
Chinese (zh)
Inventor
邹建华
Original Assignee
中山市开普电器有限公司
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 中山市开普电器有限公司 filed Critical 中山市开普电器有限公司
Publication of WO2018188364A1 publication Critical patent/WO2018188364A1/fr

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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

Definitions

  • the utility model relates to an electromagnetic leakage protection circuit.
  • the utility model overcomes the deficiencies of the above technology, and provides an electromagnetic leakage protection circuit that disconnects the power switch when the leakage value reaches the set value regardless of the power supply voltage value.
  • An electromagnetic leakage protection circuit includes a housing 1 in which an AC input interface 2 and an AC output interface 3 are disposed, and an AC leakage switch 4 is disposed between the AC input interface 2 and the AC output interface 3, A zero-sequence current transformer 5 is disposed between the leakage switch 4 and the AC output interface 3 for detecting a leakage current on the AC power line, and a diode D1 is connected between the two output ends of the zero-sequence current transformer 5, The diode D1 is connected in parallel with the trip coil L1 that controls the leakage switch 4 to be turned off according to the magnitude of the leakage current detected by the zero-sequence current transformer 5.
  • a test switch 6 is connected to an input end of the zero-sequence current transformer 5, and the other end of the test switch 6 is connected to a neutral line, and the other input end of the zero-sequence current transformer 5 is connected to the fire line through a resistor R1. Pick up.
  • the AC input interface 2 includes a neutral input interface 21 and a live input interface 22, and the AC output interface 3 includes a neutral output interface 31 and a live output interface 32.
  • a thermistor MOV1 is connected between the live line and the neutral line.
  • the leakage and power-off operation of the utility model has nothing to do with the voltage value of the input power source.
  • the zero-sequence current transformer detects that the leakage value reaches the set value, the leakage switch is disconnected, the power supply is cut off, and the user's personal safety is better protected.
  • the utility model has strong impact resistance, strong anti-environment interference, no auxiliary working power supply, and is not affected by the fluctuation of the working voltage. Even if the main circuit is in phase, the leakage protection circuit of the utility model can work normally.
  • Figure 1 is a schematic view of the utility model.
  • an electromagnetic leakage protection circuit includes a housing 1 , and an AC input interface 2 and an AC output interface 3 are disposed in the housing 1 , and the AC input interface 2 and the AC output interface 3 are disposed between the AC input interface 2 and the AC output interface 3 .
  • the leakage switch 4 is provided with a zero-sequence current transformer 5 disposed on the AC power line for detecting leakage current between the leakage switch 4 and the AC output interface 3, between the two output ends of the zero-sequence current transformer 5
  • a diode D1 is connected, and the diode D1 is connected in parallel with a trip coil L1 that controls the leakage switch 4 to be turned off according to the magnitude of the leakage current detected by the zero-sequence current transformer 5.
  • the AC input interface 2 includes a zero line input interface 21 and a hot line input interface 22, and the AC output interface 3 includes a zero line output interface 31 and a live line output interface 32, and the live line and zero.
  • a thermistor MOV1 is connected between the lines.
  • the leakage switch 4 When the leakage switch 4 is pressed, when leakage occurs, the leakage current generates an induced current through the zero-sequence current transformer 5, and the induced current is transmitted to the trip coil L1 through the diode D1 to generate an electromagnetic induction force, when the induced current reaches the set value.
  • the electromagnetic induction force generated by the trip coil L1 drives the electromagnetic trip mechanism to operate, disconnects the leakage switch 4, and cuts off the power.
  • a test switch 6 is connected to an input end of the zero-sequence current transformer 5, and the other end of the test switch 6 is connected to a neutral line, and the other input end of the zero-sequence current transformer 5 is connected to a live line through a resistor R1 for Test whether the leakage protection circuit works normally.
  • the test switch 6 is triggered to form a short circuit.
  • the short-circuit current passes through the zero-sequence current transformer 5, an induced current exceeding the set value is generated, if the trip coil
  • the electromagnetic induction force generated by L1 drives the electromagnetic tripping mechanism to work, disconnects the leakage switch 4, and cuts off the power supply, and the leakage protection circuit can work normally, otherwise the leakage protection circuit fails.

Abstract

La présente invention concerne un circuit de protection contre les fuites électromagnétiques, comprenant une coque (1) dans laquelle est disposée une interface d'entrée de courant alternatif (2) et une interface de sortie de courant alternatif (3) ; un interrupteur de fuite (4) disposé entre l'interface d'entrée de courant alternatif (2) et l'interface de sortie de courant alternatif (3) ; un transformateur de courant à champ homopolaire (5) emmanché sur une ligne de courant alternatif, servant à détecter le courant de fuite et disposé entre l'interrupteur de fuite (4) et l'interface de sortie de courant alternatif (3) ; une diode (D1) connectée entre deux extrémités de sortie du transformateur de courant à champ homopolaire (5) ; et une bobine de déclenchement (L1) servant à commander la déconnexion de l'interrupteur de fuite (4) en fonction du courant de fuite détecté par le transformateur de courant à champ homopolaire (5), et connectée en parallèle à la diode (D1), ce qui permet d'assurer l'inutilité de la valeur de tension de puissance et de déconnecter un interrupteur de courant électrique lorsque la valeur de fuite atteint la valeur de réglage.
PCT/CN2017/115426 2017-04-12 2017-12-11 Circuit de protection contre les fuites électromagnétiques WO2018188364A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720378510.1 2017-04-12
CN201720378510.1U CN206712446U (zh) 2017-04-12 2017-04-12 一种电磁式漏电保护电路

Publications (1)

Publication Number Publication Date
WO2018188364A1 true WO2018188364A1 (fr) 2018-10-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/115426 WO2018188364A1 (fr) 2017-04-12 2017-12-11 Circuit de protection contre les fuites électromagnétiques

Country Status (2)

Country Link
CN (1) CN206712446U (fr)
WO (1) WO2018188364A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206712446U (zh) * 2017-04-12 2017-12-05 中山市开普电器有限公司 一种电磁式漏电保护电路
CN108695820A (zh) * 2018-07-21 2018-10-23 朱德锋 防逆电接地保护系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453592Y (zh) * 2000-11-08 2001-10-10 张友良 多功能电磁式三相电动机保护开关
CN2671196Y (zh) * 2003-11-20 2005-01-12 潘家源 带有电压监控的漏电保护器
CN205595761U (zh) * 2016-05-13 2016-09-21 哈尔滨理工大学 家用漏电过压保护器
CN206712446U (zh) * 2017-04-12 2017-12-05 中山市开普电器有限公司 一种电磁式漏电保护电路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453592Y (zh) * 2000-11-08 2001-10-10 张友良 多功能电磁式三相电动机保护开关
CN2671196Y (zh) * 2003-11-20 2005-01-12 潘家源 带有电压监控的漏电保护器
CN205595761U (zh) * 2016-05-13 2016-09-21 哈尔滨理工大学 家用漏电过压保护器
CN206712446U (zh) * 2017-04-12 2017-12-05 中山市开普电器有限公司 一种电磁式漏电保护电路

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CN206712446U (zh) 2017-12-05

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