CN108281939A - Three-phase electricity high security broken neutral line protective device - Google Patents
Three-phase electricity high security broken neutral line protective device Download PDFInfo
- 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
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- China
- Prior art keywords
- power supply
- phase
- module
- protective device
- out detection
- Prior art date
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Links
- 230000007935 neutral effect Effects 0.000 title claims abstract description 32
- 230000001681 protective effect Effects 0.000 title claims abstract description 20
- 230000005611 electricity Effects 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- H02H3/24—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 undervoltage or no-voltage
- H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- 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
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.
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)
| 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 |
-
2018
- 2018-03-20 CN CN201810229923.2A patent/CN108281939B/en active Active
Patent Citations (3)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108281939B (en) | 2024-02-09 |
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