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CN108281939A - Three-phase electricity high security broken neutral line protective device - Google Patents

Three-phase electricity high security broken neutral line protective device Download PDF

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Publication number
CN108281939A
CN108281939A CN201810229923.2A CN201810229923A CN108281939A CN 108281939 A CN108281939 A CN 108281939A CN 201810229923 A CN201810229923 A CN 201810229923A CN 108281939 A CN108281939 A CN 108281939A
Authority
CN
China
Prior art keywords
power supply
phase
module
protective device
out detection
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
CN201810229923.2A
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Chinese (zh)
Other versions
CN108281939B (en
Inventor
喻元卿
王跃胜
周光武
张锐
罗雅兮
马闵
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.)
Sichuan Electric Shield Safe Technology Ltd
Original Assignee
Sichuan Electric Shield Safe Technology Ltd
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 Sichuan Electric Shield Safe Technology Ltd filed Critical Sichuan Electric Shield Safe Technology Ltd
Priority to CN201810229923.2A priority Critical patent/CN108281939B/en
Publication of CN108281939A publication Critical patent/CN108281939A/en
Application granted granted Critical
Publication of CN108281939B publication Critical patent/CN108281939B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24Emergency 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 undervoltage or no-voltage
    • H02H3/253Emergency 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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention discloses a kind of three-phase electricity high security broken neutral line protective devices, the protective device includes burn out detection module, control module, power supply converts output module, protection switch, the burn out detection module is connect with each phase line and the neutral conductor respectively, to monitor the break-make of each phase line and the neutral conductor, the control module and burn out detection module, power supply converts output module connection, phase line switching is carried out to receive the signal of burn out detection module and control power supply conversion output module, the power supply conversion output module provides working power to select arbitrary two-phase power supply output to be switched for protection.The present invention can monitor the neutral conductor or/and any phase line broken string and starting protection switch is powered to disconnect to protect electrical equipment, have both disconnected N and default-phase protection function, have high safety.

Description

Three-phase electricity high security broken neutral line protective device
Technical field
The present invention relates to a kind of electric security protector equipment, protect and fill more particularly to a kind of three-phase electricity broken neutral line It sets.
Background technology
Broken neutral line protective device is the important safety guard of power supply system, and current three-phase electrical neutral axis is disconnected Line protective device, which is usually connect with arbitrary two phase line in three-phase electricity, is used as driving power, i.e. when detecting broken neutral line Electrical equipment is protected by disconnecting protection switch.But if there is arbitrary two phase line of access broken neutral line protective device In any phase line and the neutral conductor break simultaneously situation, then can lead to not provide driving power for protection switch, so as to cause in The failure of property line broken wire protecting equipment, seriously affects electrical safety.
Invention content
Technical problem to be solved by the invention is to provide a kind of three-phase electricity high security broken neutral line protective device, The broken string of any phase line and the neutral conductor, and effectively driving protection switch work can be monitored in real time, and there is high safety.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that:
A kind of three-phase electricity high security broken neutral line protective device, including the conversion of burn out detection module, control module, power supply are defeated Go out module, protection switch, the burn out detection module is connect with each phase line and the neutral conductor respectively, to monitor each phase line and neutrality The break-make of line, the control module is connect with burn out detection module, power supply conversion output module, to receive burn out detection module Signal and control power supply conversion output module and carry out phase line switching, the power input of power supply conversion output module with it is each Phase line connection, power output end and protection switch connection, to select arbitrary two-phase power supply output to provide work for protection switch Power supply.A kind of three-phase electricity high security broken neutral line protective device of the present invention is by each phase line of burn out detection module monitors in Property line break-make, and pass through control module receive processing break-make information number and control power supply convert output module carry out phase line switching To provide two-phase working power for protection switch, to reach the safeguard protection to electric wiring.
Preferably, the protection switch operating voltage is 220V, the selection of protection switch can be convenient for.
Preferably, being provided with transformer between the protection switch and power supply conversion output module, can be switched according to protection Operating voltage transformation processing is carried out to the power supply of 380V.
Preferably, the protection switch is breaker or contactor, can select to be applicable according to application environment.
Preferably, the power supply conversion output module is additionally provided with alarm signal output ends, access alarm can be facilitated to set It is standby.
Compared with prior art, a kind of advantageous effect of three-phase electricity high security broken neutral line protective device of the present invention: Convert that output module can monitor the neutral conductor or/and any phase line breaks and opens by burn out detection module, control module, power supply Dynamic protection switch is powered to disconnect to protect electrical equipment, has both disconnected N and default-phase protection function, has high safety.
Description of the drawings
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of schematic diagram of three-phase electricity high security broken neutral line protective device of the present invention.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics .
As shown in Figure 1, a kind of three-phase electricity high security broken neutral line protective device of the present invention, including burn out detection mould Block, control module, power supply conversion output module, protection switch, the burn out detection module connect with each phase line and the neutral conductor respectively It connects, to monitor the break-make of each phase line and the neutral conductor, the control module connects with burn out detection module, power supply conversion output module It connects, phase line switching, the power supply conversion is carried out to receive the signal of burn out detection module and control power supply conversion output module The power input of output module is connect with each phase line, power output end is connected with protection switch, to select arbitrary two-phase electricity Source output provides working power for protection switch.A kind of three-phase electricity high security broken neutral line protective device of the present invention, works as inspection Measure input power break A phases when, control module driving relay J2 conducting output two-phase 380V working powers are opened with starting protection Close work, when detect input power break B phases when, control module drive relay J3 conducting output two-phase 380V working powers with Starting protection switchs work, when detect input power break C phases when, control module drives relay J1 conducting output two-phase 380V Working power with starting protection switch work, when detect input power only break N phases when, control module drive relay J1 or J2 or J3 conducting output two-phase 380V working powers switch work with starting protection.
As shown in Figure 1, in a kind of three-phase electricity high security broken neutral line protective device of the present invention, the protection switchs work It is 220V to make voltage, transformer is provided between the protection switch and power supply conversion output module, the protection switch is open circuit Device or contactor, the power supply conversion output module are additionally provided with alarm signal output ends.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, every spirit in the present invention With within principle made by all any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention.

Claims (5)

1. a kind of three-phase electricity high security broken neutral line protective device, it is characterised in that:Including burn out detection module, control mould Block, power supply conversion output module, protection switch, the burn out detection module is connect with each phase line and the neutral conductor respectively, to supervise Each phase line and the break-make of the neutral conductor are surveyed, the control module is connect with burn out detection module, power supply conversion output module, to connect It receives the signal of burn out detection module and controls power supply conversion output module and carry out phase line switching, the power supply conversion output module Power input is connect with each phase line, power output end and protection switch connect, and is guarantor to select arbitrary two-phase power supply output Shield switch provides working power.
2. a kind of three-phase electricity high security broken neutral line protective device according to claim 1, it is characterised in that:It is described Protection switch operating voltage is 220V.
3. a kind of three-phase electricity high security broken neutral line protective device according to claim 1 or 2, it is characterised in that: It is provided with transformer between the protection switch and power supply conversion output module.
4. a kind of three-phase electricity high security broken neutral line protective device according to claim 1 or 2, it is characterised in that: The protection switch is breaker or contactor.
5. a kind of three-phase electricity high security broken neutral line protective device according to claim 1, it is characterised in that:It is described Power supply conversion output module is additionally provided with alarm signal output ends.
CN201810229923.2A 2018-03-20 2018-03-20 Neutral line breakage protection device with high safety for three-phase electricity Active CN108281939B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810229923.2A CN108281939B (en) 2018-03-20 2018-03-20 Neutral line breakage protection device with high safety for three-phase electricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810229923.2A CN108281939B (en) 2018-03-20 2018-03-20 Neutral line breakage protection device with high safety for three-phase electricity

Publications (2)

Publication Number Publication Date
CN108281939A true CN108281939A (en) 2018-07-13
CN108281939B CN108281939B (en) 2024-02-09

Family

ID=62809945

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810229923.2A Active CN108281939B (en) 2018-03-20 2018-03-20 Neutral line breakage protection device with high safety for three-phase electricity

Country Status (1)

Country Link
CN (1) CN108281939B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205791462U (en) * 2016-06-06 2016-12-07 国网天津市电力公司 It is applicable to the transformator broken neutral line monitoring system of low-voltage network
CN106229936A (en) * 2016-08-10 2016-12-14 国网浙江瑞安市供电有限责任公司 The disconnected neutral conductor and the protection device of phase shortage
CN207926160U (en) * 2018-03-20 2018-09-28 四川电之盾安全技术有限公司 A kind of three-phase electricity high security broken neutral line protective device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205791462U (en) * 2016-06-06 2016-12-07 国网天津市电力公司 It is applicable to the transformator broken neutral line monitoring system of low-voltage network
CN106229936A (en) * 2016-08-10 2016-12-14 国网浙江瑞安市供电有限责任公司 The disconnected neutral conductor and the protection device of phase shortage
CN207926160U (en) * 2018-03-20 2018-09-28 四川电之盾安全技术有限公司 A kind of three-phase electricity high security broken neutral line protective device

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Publication number Publication date
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