CN203707761U - 10kV distribution transformer neutral line breaking trip device - Google Patents
10kV distribution transformer neutral line breaking trip device Download PDFInfo
- Publication number
- CN203707761U CN203707761U CN201420049828.1U CN201420049828U CN203707761U CN 203707761 U CN203707761 U CN 203707761U CN 201420049828 U CN201420049828 U CN 201420049828U CN 203707761 U CN203707761 U CN 203707761U
- Authority
- CN
- China
- Prior art keywords
- neutral line
- voltage
- low
- contactor
- output
- 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.)
- Expired - Fee Related
Links
- 230000001264 neutralization Effects 0.000 title claims abstract description 70
- 238000001514 detection method Methods 0.000 claims description 10
- 230000001131 transforming Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001681 protective Effects 0.000 abstract 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Abstract
The utility model discloses a 10kV distribution transformer neutral line breaking trip device which is composed of a neutral line breaking trip module, a residual current operated protective device, a fuse and an alternating-current contactor. The neutral line breaking trip module is connected into a low-voltage-side three-phase power source for monitoring. The neutral line breaking trip module is further connected with any phase of the low-voltage-side three-phase power source through the fuse. The neutral line breaking trip device is connected with the residual current operated protective device. The residual current operated protective device is connected with the alternating-current contactor. The neutral line breaking trip module, the residual current operated protective device and the alternating-current contactor are connected with a neutral line separately. The 10kV distribution transformer neutral line breaking trip device of the utility model has the following advantages that monitoring is performed on the low-voltage-side three-phase voltage by arranging the neutral line breaking trip module at the low-voltage side, and the residual current operated protective device and the alternating-current contactor are combined, so the line neutral line broken line overvoltage and undervoltage protection can be realized to prevent the burnout of user equipment.
Description
Technical field
The utility model relates to the neutral line resist technology field of three phase and four wire circuit system, is specially a kind of broken neutral line tripgear.
Background technology
In three phase and four wire circuit system, the neutral line is the common return of three-phase circuit.The neutral line can guarantee that threephase load becomes three independent loops that are independent of each other; No matter whether balance of each phase load, each phase load all can bear symmetrical phase voltage, no matter which breaks down mutually, other two-phases can both normally be worked.The transformer neutral line adopts the fixing angle bar ground connection of steel strand wire, in the time of steel strand wire generation broken string or steel strand wire and angle bar loose contact, just there will be the situation of transformer broken neutral line, once there is 10KV distribution transformer broken neutral line, will cause low-pressure side voltage to distort, user's voltage raise or reduce, causing user power utilization equipment to burn out.
The tripgear of current three phase and four wire circuit system mesolow side can only be found the open circuit fault of triple line, and can not find in time neutral line generation disconnection fault, cannot make overvoltage/undervoltage protection, may cause the damage of subscriber equipment.
Utility model content
The technical problem that the utility model solves: in three phase and four wire circuit system, after neutral line generation disconnection fault, cause low-pressure side voltage to distort, and then cause user power utilization equipment to burn out.
For solving the problems of the technologies described above, a kind of 10kV distribution transforming broken neutral line tripgear of the present utility model, by broken neutral line tripping operation module, RCD, fuse and A.C. contactor composition, described broken neutral line tripping operation module has five inputs and an output, described RCD has an input and two outputs, described A.C. contactor has an input and an output, wherein four inputs of described broken neutral line tripping operation module access respectively low-pressure side three phase mains and the neutral line, its another input by described fuse after with arbitrary being connected in low-pressure side three phase mains, its output is connected to the input of described RCD, an output of described RCD is connected to the neutral line, another output is connected with the input of described A.C. contactor, the output of described A.C. contactor is connected to the neutral line, three contact points of described A.C. contactor access respectively low-pressure side three phase mains.
Operation principle of the present utility model is:
By in low-pressure side three phase mains and neutral line access broken neutral line tripping operation module, in the time of neutral line generation disconnection fault, in the unbalanced circuit of three-phase load, load neutral point is subjected to displacement, the three-phase load voltage of low-pressure side three-phase mains voltage is no longer symmetrical, therefore the voltage of each phase load changes, broken neutral line tripping operation module is monitored each phase voltage, in the time exceeding the default overvoltage/undervoltage protection threshold value of broken neutral line tripping operation module, by the control of the module that trips by broken neutral line, cut off the input power to RCD, thereby make the inductance coil power-off of A.C. contactor, three contact points flick, realize the disconnection of low-pressure side three phase mains circuit, protection user power utilization equipment is not burned, thereby realize the protection of centering line broken string.
Described broken neutral line tripping operation module is made up of a mains switch and a voltage monitoring module; described mains switch is three single control switches in parallel; access low-pressure side three phase mains after described voltage detection module has three ports to be connected with three single control switches respectively; described voltage detection module has a port to be connected to the neutral line, the output that described voltage detection module also has two ports to be connected with described RCD as the input being connected with described fuse.
Voltage monitoring module is prior art, can accurately detect three-phase voltage, has overvoltage, under-voltage, default-phase protection function.Wherein, overvoltage/undervoltage threshold value, output time delay adjustable.Low-pressure side three phase mains accesses voltage monitoring module by mains switch, thereby utilizes voltage monitoring module to monitor loop voltage.
The beneficial effects of the utility model are for arranging broken neutral line tripping operation module low-pressure side three-phase voltage is monitored by being arranged on low-pressure side; and in conjunction with RCD and A.C. contactor; realize the overvoltage/undervoltage protection to broken neutral line in circuit, prevented burning out of subscriber equipment.In addition, 10kV distribution transforming broken neutral line tripgear of the present utility model can also be monitored low-pressure side line voltage distribution, improves rate of qualified voltage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of 10kV distribution transforming of the utility model broken neutral line tripgear.
Fig. 2 is the schematic diagram of broken neutral line tripping operation module in a kind of 10kV distribution transforming of the utility model broken neutral line tripgear.
Embodiment
Be described further below in conjunction with the drawings and specific embodiments.
Fig. 1 and Fig. 2 show the embodiment of a kind of 10kV distribution transforming of the utility model broken neutral line tripgear.A kind of 10kV distribution transforming broken neutral line tripgear of the present utility model, by broken neutral line tripping operation module 1, RCD 2, fuse 3 and A.C. contactor 4 form, described broken neutral line tripping operation module 1 has five inputs and an output, described RCD 2 has an input and two outputs, described A.C. contactor 4 has an input and an output, wherein four inputs of described broken neutral line tripping operation module 1 access respectively low-pressure side three phase mains and the neutral line, its another input by described fuse 3 after with arbitrary being connected in low-pressure side three phase mains, its output is connected to the input of described RCD 2, an output of described RCD 2 is connected to the neutral line, another output is connected with the input of described A.C. contactor 4, the output of described A.C. contactor 4 is connected to the neutral line, three contact points of described A.C. contactor 4 access respectively low-pressure side three phase mains.Described broken neutral line tripping operation module 1 is made up of a mains switch 1-1 and a voltage monitoring module 1-2; described mains switch 1-1 is three single control switches in parallel; access low-pressure side three phase mains after described voltage detection module 1-2 has three ports to be connected with three single control switches respectively; described voltage detection module 1-2 has a port to be connected to the neutral line, the output that described voltage detection module also has two ports to be connected with described RCD 2 as the input being connected with described fuse 3.
According to the 220V that is defined as of China's household electrical appliances rated voltage, allow electrical equipment to move 1.1 times of rated voltages, the overvoltage threshold of voltage detection module is made as to 242V, under-voltage threshold value is made as 198V, meanwhile, in order to prevent misoperation, sets time delay 3 ~ 8s.By in low-pressure side three phase mains access broken neutral line tripping operation module, in the time of neutral line generation disconnection fault, in the unbalanced circuit of three-phase load, load neutral point is subjected to displacement, three-phase load voltage is no longer symmetrical, therefore the voltage of each phase load changes, broken neutral line tripping operation module is monitored each phase voltage, in the time exceeding the default overvoltage/undervoltage protection threshold value of broken neutral line tripping operation module, by the control of the module that trips by broken neutral line, cut off the power supply of RCD, thereby make the inductance coil power-off of A.C. contactor, contact point disconnects, realize the disconnection of circuit, protection user power utilization equipment is not burned, thereby realize the protection of centering line broken string.What in broken neutral line tripping operation module, realization was carried out monitoring function to voltage is voltage monitoring module.
The utility model does not relate to partly all same as the prior art or employing prior aries to be realized.
Claims (2)
1. a 10kV distribution transforming broken neutral line tripgear, it is characterized in that: by broken neutral line tripping operation module (1), RCD (2), fuse (3) and A.C. contactor (4) composition, described broken neutral line tripping operation module (1) has five inputs and an output, described RCD (2) has an input and two outputs, described A.C. contactor (4) has an input and an output, wherein four inputs of described broken neutral line tripping operation module (1) access respectively low-pressure side three phase mains and the neutral line, its another input by described fuse (3) after with arbitrary being connected in low-pressure side three phase mains, its output is connected to the input of described RCD (2), an output of described RCD (2) is connected to the neutral line, another output is connected with the input of described A.C. contactor (4), the output of described A.C. contactor (4) is connected to the neutral line, three contact points of described A.C. contactor (4) access respectively low-pressure side three phase mains.
2. 10kV distribution transforming broken neutral line tripgear according to claim 1, it is characterized in that: described broken neutral line tripping operation module (1) is made up of a mains switch (1-1) and a voltage monitoring module (1-2), described mains switch (1-1) is three single control switches in parallel, access low-pressure side three phase mains after described voltage detection module (1-2) has three ports to be connected with three single control switches respectively, described voltage detection module (1-2) has a port to be connected to the neutral line, the output that described voltage detection module also has two ports to be connected with described RCD (2) as the input being connected with described fuse (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049828.1U CN203707761U (en) | 2014-01-26 | 2014-01-26 | 10kV distribution transformer neutral line breaking trip device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049828.1U CN203707761U (en) | 2014-01-26 | 2014-01-26 | 10kV distribution transformer neutral line breaking trip device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203707761U true CN203707761U (en) | 2014-07-09 |
Family
ID=51058143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420049828.1U Expired - Fee Related CN203707761U (en) | 2014-01-26 | 2014-01-26 | 10kV distribution transformer neutral line breaking trip device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203707761U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124664A (en) * | 2014-08-19 | 2014-10-29 | 国网浙江宁波市鄞州区供电公司 | Line breakage protection method and line breakage protection system for neutral line |
| CN113009380A (en) * | 2020-12-31 | 2021-06-22 | 宁波三星医疗电气股份有限公司 | Neutral line disconnection fault detection method based on electric energy meter and readable storage medium |
-
2014
- 2014-01-26 CN CN201420049828.1U patent/CN203707761U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124664A (en) * | 2014-08-19 | 2014-10-29 | 国网浙江宁波市鄞州区供电公司 | Line breakage protection method and line breakage protection system for neutral line |
| CN113009380A (en) * | 2020-12-31 | 2021-06-22 | 宁波三星医疗电气股份有限公司 | Neutral line disconnection fault detection method based on electric energy meter and readable storage medium |
| CN113009380B (en) * | 2020-12-31 | 2022-11-04 | 宁波三星医疗电气股份有限公司 | Neutral line disconnection fault detection method based on electric energy meter and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203983950U (en) | Broken neutral line automatic safety device | |
| CN203707761U (en) | 10kV distribution transformer neutral line breaking trip device | |
| CN204012658U (en) | Distribution transformer broken neutral line protective device | |
| CN202034769U (en) | Plastic shell leakage controller for three-phase power supply | |
| CN205508744U (en) | Circuit breaker control system | |
| CN202872329U (en) | Circuit breaker with overvoltage protection function | |
| CN203166469U (en) | Phase sequence protective relay | |
| CN201733065U (en) | Low-voltage single-phase power source overvoltage protective device | |
| CN203397430U (en) | Circuit breaker for prepaid electricity meter | |
| CN201985508U (en) | Zero line break protector and connecting structure thereof | |
| CN205178472U (en) | Earth -free power supply system of neutral point with ground connection protect function | |
| CN203278188U (en) | Zero line breaking protection device | |
| CN204046131U (en) | A kind of broken neutral line protective device | |
| CN203367980U (en) | Distribution box with temperature protection device | |
| CN201504090U (en) | Zero line open circuit protection device for low-voltage distribution network | |
| CN203747430U (en) | Balanced electricity saver used for three-phase power supply and power distribution system | |
| CN104134967B (en) | A kind of broken neutral line protection device | |
| CN203674700U (en) | Photoelectric arc light protection system | |
| CN202696519U (en) | Self-coupling voltage-reducing starting cabinet | |
| CN204167868U (en) | Protector off zero | |
| CN202424113U (en) | Over-voltage leakage protection device | |
| CN203377582U (en) | Overvoltage breaking zero protection device | |
| CN210867163U (en) | Overcurrent protection circuit, electric cabinet and electric equipment | |
| CN202333471U (en) | Circuit for low-voltage complete switch equipment | |
| CN202285389U (en) | Contactless switch in mining flame-proof and intrinsically safe soft starter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20190126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |