CN108879599A - A kind of broken neutral line protective device - Google Patents
A kind of broken neutral line protective device Download PDFInfo
- Publication number
- CN108879599A CN108879599A CN201810776132.1A CN201810776132A CN108879599A CN 108879599 A CN108879599 A CN 108879599A CN 201810776132 A CN201810776132 A CN 201810776132A CN 108879599 A CN108879599 A CN 108879599A
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- China
- Prior art keywords
- monitoring modular
- module
- carries out
- level
- control module
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- 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
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to a kind of broken neutral line protective device, including host computer, monitoring modular, control module, input module and display module, host computer carries out logical operation and each module of integrated management according to measurement parameter；Each target point electrical parameter of monitoring modular real-time monitoring；Control module carries out corresponding actions according to host computer decision instruction；Input module is button, carries out task setting according to display module prompt；Display module carries out briefing and operation result is shown; the broken neutral line failure of multichannel outlet is protected in present invention realization; pass through the monitoring to phase current and N line current; real time discriminating simultaneously protects each low-pressure line-outgoing circuit broken neutral line failure; it prevents from causing the neutral point in three phase supply circuit to shift due to distribution broken neutral line, to cause the damage of electrical equipment.
Description
Technical field
The present invention relates to a kind of broken neutral line protective device, the power distribution cabinet or distribution board in low-voltage distribution circuit are applied
It is interior.
Background technique
China's low-voltage distribution connection type is three-phase four-wire system, and three-phase refers to L1--- (A) phase, L2--- (B) phase, L3--- (C)
Phase three-phase, four lines refer to three phase lines and a N line (neutral conductor) by running current.In three-phase and four-line voltage, line electricity
Pressure refers to that any two voltage between phases is 380V in three-phase, and phase voltage refers to the voltage in three-phase between any one phase and the neutral conductor, generally
For 220V.
Due to there is middle line in three-phase four-wire system, and the effect of middle line is close pair of each phase voltage in proof load
Claim, voltage will not occur in laod unbalance and be raised and lowered, if the phase line of a certain phase breaks, the voltage of other two-phases is not
Become.
In the three-phase four-wire system of step down side neutral-point solid ground, power supply is usually symmetrical, still
The asymmetry or broken neutral line of normal three characteristics of the middle term load, can be such that transformer neutral point is subjected to displacement, cause three-phase load end voltage
Abnormal, load cisco unity malfunction will damage electrical equipment when serious.The neutral conductor will cause serious consequence once breaking,
Cause a large amount of electrical equipment scaling loss, insulation once punctures, it will jeopardizes personal safety.Such accident repeatedly occurs in recent years, it is right
Power supply enterprise causes heavy economic losses and adverse effect.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provides a kind of broken neutral line protective device, solves
In the prior art since distribution broken neutral line causes the neutral point in three phase supply circuit to shift, so that electricity consumption be caused to set
The problem of standby damage.
Technical scheme is as follows：
A kind of broken neutral line protective device, including host computer, level-one monitoring modular, primary control module, second level monitoring modular,
Two-stage control module, three-level monitoring modular A, three class control modules A, three-level monitoring modular B, three class control module B, input mould
Block, display module;The host computer carries out logical operation and each module of integrated management according to measurement parameter；The level-one monitors mould
Block, second level monitoring modular, three-level monitoring modular A and each target point electrical parameter of three-level monitoring modular B real-time monitoring；The level-one control
Molding block, Two-stage control module, three class control modules A and three class control module B are accordingly moved according to host computer decision instruction
Make；The input module is button, carries out task setting according to display module prompt；The display module carries out briefing
It is shown with operation result.
In the level-one monitoring modular, second level monitoring modular, three-level monitoring modular A and three-level monitoring modular B, each monitoring
1 road protection exit of loop configuration or multiple circuits share 1 protection exit.
The beneficial effects of the invention are as follows：
4 times low-pressure line-outgoing broken neutral line failures are monitored simultaneously, and breaking protection definite value and delay can be set；Defencive function：Broken string is protected
Shield movement and breaker or air switch（Support automatically controlled separating brake）Tripping, device configure 1 road protection exit by each monitoring circuit,
It can also shared 1 protection exit of multiloop.Statistical function, in statistical monitoring circuit 24 hours in each period（1 hour is one
Section）Maximum value and minimum value are used for analysis system operation conditions, provide foundation for protection definite value setting；Malfunction remembers function
Can, after disconnection fault occurs, automatically cleared failure state does not pass through device to prompt fault message when user's lookup failure
Involution key can remove current failure instruction state；Communication function：Device provides RS485 interface, it can be achieved that device operating parameter
Setting or real time data are checked.
The device can be applied in the power distribution cabinet or distribution board in low-voltage distribution circuit, realize to multichannel（4 circuits）Outlet
Broken neutral line failure protected, by the monitoring to phase current and N line current, real time discriminating simultaneously protects each low-pressure line-outgoing
Circuit broken neutral line failure prevents from causing the neutral point in three phase supply circuit to shift due to distribution broken neutral line, from
And cause the damage of electrical equipment.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings：
Fig. 1 is a kind of schematic diagram of broken neutral line protective device.
Specific embodiment
The present invention will be further described with embodiment with reference to the accompanying drawing.
Embodiment
Referring to Fig.1, a kind of broken neutral line protective device, including host computer, level-one monitoring modular, primary control module,
Second level monitoring modular, Two-stage control module, three-level monitoring modular A, three class control modules A, three-level monitoring modular B, three class control
Module B, input module, display module;The host computer carries out logical operation and each module of integrated management according to measurement parameter；Institute
State level-one monitoring modular, second level monitoring modular, three-level monitoring modular A and each target point electricity ginseng of three-level monitoring modular B real-time monitoring
Number；The primary control module, Two-stage control module, three class control modules A and three class control module B refer to according to host computer judgement
It enables and carries out corresponding actions；The input module is button, carries out task setting according to display module prompt；The display module
It carries out briefing and operation result is shown.
One base to three-level monitoring modular to the measurement electrical parameter common transport of target point to host computer as protection measuring and calculating
Plinth data.One carries out corresponding actions according to host computer decision instruction to three class control module.
Described device uses AC power source AC85V ~ 460V, has a RS485 interface for debugging.Controllable exchange is logical
12, road（3, every channel, 2 phase currents, 1 neutral current）, output：4 tunnels（It is exported for trip protection）.
In use, the present apparatus can carry out task setting and the electrical parameter reality according to monitoring partial feedback by input module
When calculate as a result, simultaneously as needed to each control section issue instruct.
The present apparatus is applicable to neutral conductor short-line protection automatic job, and has the advantages that real-time operation, instant action, mentions
High device security.
The device is mountable in three-phase distribution end branch terminal box or distribution box, in source side electric voltage exception or neutrality
When line disconnection fault occurs, by PLC controller, load power supply can be cut off, in time to protect the Electrical Safety of load-side.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
Knowledge described in book illustrates the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also have
Further changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.It is claimed
Range is defined by the following claims.
Claims (2)
1. a kind of broken neutral line protective device, it is characterised in that including host computer, level-one monitoring modular, primary control module,
Second level monitoring modular, Two-stage control module, three-level monitoring modular A, three class control modules A, three-level monitoring modular B, three class control
Module B, input module, display module;The host computer carries out logical operation and each module of integrated management according to measurement parameter；Institute
State level-one monitoring modular, second level monitoring modular, three-level monitoring modular A and each target point electricity ginseng of three-level monitoring modular B real-time monitoring
Number；The primary control module, Two-stage control module, three class control modules A and three class control module B refer to according to host computer judgement
It enables and carries out corresponding actions；The input module is button, carries out task setting according to display module prompt；The display module
It carries out briefing and operation result is shown.
2. a kind of broken neutral line protective device according to claim 1, it is characterised in that the level-one monitoring modular, two
In grade monitoring modular, three-level monitoring modular A and three-level monitoring modular B, each monitoring circuit configures 1 road protection exit or multiple times
Road shares 1 protection exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810776132.1A CN108879599A (en) | 2018-07-16 | 2018-07-16 | A kind of broken neutral line protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810776132.1A CN108879599A (en) | 2018-07-16 | 2018-07-16 | A kind of broken neutral line protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108879599A true CN108879599A (en) | 2018-11-23 |
Family
ID=64302175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810776132.1A Pending CN108879599A (en) | 2018-07-16 | 2018-07-16 | A kind of broken neutral line protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879599A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060243A (en) * | 2006-04-18 | 2007-10-24 | 万家盛 | Zero line broken protective method and its control circuit |
| CN203660664U (en) * | 2013-11-13 | 2014-06-18 | 国家电网公司 | Comprehensive distribution box integrating protection, measurement and control |
| CN106972462A (en) * | 2017-03-16 | 2017-07-21 | 国网山西省电力公司晋城供电公司 | Low-voltage distribution cabinet broken neutral line protection device and detection method |
| CN107257162A (en) * | 2017-06-26 | 2017-10-17 | 河北省第二建筑工程有限公司 | Job site intelligent distribution system |
-
2018
- 2018-07-16 CN CN201810776132.1A patent/CN108879599A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060243A (en) * | 2006-04-18 | 2007-10-24 | 万家盛 | Zero line broken protective method and its control circuit |
| CN203660664U (en) * | 2013-11-13 | 2014-06-18 | 国家电网公司 | Comprehensive distribution box integrating protection, measurement and control |
| CN106972462A (en) * | 2017-03-16 | 2017-07-21 | 国网山西省电力公司晋城供电公司 | Low-voltage distribution cabinet broken neutral line protection device and detection method |
| CN107257162A (en) * | 2017-06-26 | 2017-10-17 | 河北省第二建筑工程有限公司 | Job site intelligent distribution system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |