CN203014372U - Transformer neutral grounding resistor cabinet - Google Patents
Transformer neutral grounding resistor cabinet Download PDFInfo
- Publication number
- CN203014372U CN203014372U CN 201320028988 CN201320028988U CN203014372U CN 203014372 U CN203014372 U CN 203014372U CN 201320028988 CN201320028988 CN 201320028988 CN 201320028988 U CN201320028988 U CN 201320028988U CN 203014372 U CN203014372 U CN 203014372U
- Authority
- CN
- China
- Prior art keywords
- ground connection
- adjustable resistance
- transformer
- resistance
- current
- 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
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a transformer neutral grounding resistor cabinet, comprising a resistor cabinet body (1) made of non-metallic materials or nichrome. The resistor cabinet body (1) is internally provided with a grounding adjustable resistor (2). One end of the grounding adjustable resistor (2) is connected with a transformer neutral point, while the other end of the grounding adjustable resistor (2) is grounded. The transformer neutral grounding resistor cabinet is advantaged by being high in precision of adjustments by the grounding resistor, good in linearity, reliable in operation, convenient in installation, and beautiful in appearance.
Description
Technical field
The utility model field transformer is specifically related to a kind of transformer neutral point earthing resistance cabinet.
Background technology
The distribution system neutral point can be divided into isolated neutral system, grounded system via resistance and compensated distribution network usually.Various earthing modes are different, and occupation mode is also different.The global question of safe and reliable etc. the factor of insulation level, communication interference, relaying protection and supply network that relates to circuit and equipment owing to selecting grounding mode of transformer neutral-point; so the electric power system way of China's power distribution network and large industrial enterprise is different, mostly adopt in the past isolated neutral and through the operational mode of grounding through arc.Deep development along with the city net upgrading of rural power grids, 6KV～35KV power distribution network capacity increases sharply, network configuration is gradually improved, according to building needs, the overhead bare conductor road is substituted by cable and insulated conductor circuit just gradually, the accidents such as the switch cubicle that meanwhile, causes due to overvoltage and household electrical appliance burn out are also of common occurrence.Therefore, how the effectively economic neutral ground that arranges becomes current emphasis for electricity consumption work.But, prior art will be grounded all to be needed separately transformer neutral point outer meeting resistance ground connection, cause installing complicated, and because outer meeting resistance generally all uses the resistance of fixed resistance value, resistance precision can not be adjusted according to the transformer needs, can't realize reliable and secure ground connection.
The utility model content
The technical problems to be solved in the utility model is to provide that a kind of earth resistance degree of regulation is high, the linearity good, the transformer neutral point earthing resistance cabinet of reliable, easy for installation, good looking appearance.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of transformer neutral point earthing resistance cabinet, comprise the resistor box body that adopts nonmetallic materials or nichrome to make, be provided with the ground connection adjustable resistance in described resistor box body, an end of described ground connection adjustable resistance is connected with transformer neutral point, the other end ground connection of described ground connection adjustable resistance.
As further improvement in the technical proposal:
Also be used for the current transformer record the ground connection record cell of ground connection adjustable resistance ground connection record and to be used for gathering ground connection adjustable resistance electric current in described resistor box body, described ground connection adjustable resistance is by the primary side ground connection of current transformer, and the input of described ground connection record cell is connected with the secondary side of current transformer.
Described ground connection record cell comprises current sensor, microprocessor, memory module and the communication interface modules that is connected successively, described current sensor is connected with the secondary side of current transformer, the current information that described current sensor flows through when gathering the ground connection of ground connection adjustable resistance is also exported to microprocessor, and described microprocessor generates the ground connection record according to the current information that receives and deposits memory module in and according to control command, the ground connection record exported by communication interface modules.
The utlity model has following advantage:
1, the utility model comprises the resistor box body that adopts nonmetallic materials or nichrome to make, be provided with the ground connection adjustable resistance in the resistor box body, one end of ground connection adjustable resistance is connected with transformer neutral point, the other end ground connection of described ground connection adjustable resistance, therefore the utility model can be applied to the voltage device of power distribution network, realize the reliable ground of transformer neutral point, and can make according to the regulating working conditions of transformer earth resistance keep fixing resistance value, has the earth resistance degree of regulation high, the linearity is good, reliable, easy for installation, the advantage of good looking appearance.
2, also be used for the current transformer record the ground connection record cell of ground connection adjustable resistance ground connection record and to be used for gathering ground connection adjustable resistance electric current in resistor box body of the present utility model, the ground connection adjustable resistance is by the primary side ground connection of current transformer, the input of ground connection record cell is connected with the secondary side of current transformer, therefore can record the working condition of adjustable resistance electric current, realize transformer neutral point ground connection is diagnosed.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the external structure schematic diagram of the utility model embodiment.
Fig. 2 is the frame structure schematic diagram of the utility model embodiment.
Fig. 3 is the frame structure schematic diagram of ground connection record cell in the utility model embodiment.
Marginal data: 1, resistor box body; 2, ground connection adjustable resistance; 3, ground connection record cell; 31, current sensor; 32, microprocessor; 33, memory module; 34, communication interface modules; 4, current transformer.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made more explicit defining.
As depicted in figs. 1 and 2, the transformer neutral point earthing resistance cabinet of the present embodiment comprises the resistor box body 1 that adopts nonmetallic materials or nichrome to make, be provided with ground connection adjustable resistance 2 in resistor box body 1, one end of ground connection adjustable resistance 2 is connected with transformer neutral point, the other end ground connection of ground connection adjustable resistance 2.The present embodiment can be applied to the voltage device of power distribution network, realize the reliable ground of transformer neutral point, and can make according to the regulating working conditions of transformer earth resistance keep fixing resistance value, have advantages of that the earth resistance degree of regulation is high, the linearity good, reliable, easy for installation, good looking appearance.
In the present embodiment, the resistance adjustable extent of ground connection adjustable resistance 2 is 0.1 ohm～2000 ohm, and the current capacity ability of ground connection adjustable resistance 2 is 2 amperes to 2000 amperes.After the transformer neutral point earthing resistance cabinet that the present embodiment is installed, when non-metal earthing occurs when, be subjected to the impact of earth point resistance, remarkable reduction is arranged when flowing through the current ratio metallic earthing of earth point and neutral point, simultaneously, perfect the phase voltage rising and also significantly reduce, the residual voltage value is about half of Single Phase Metal ground connection.Therefore the present embodiment adopts Neutral Grounding through Resistance in Electrical, can play the current limliting hypotensive effect when earth fault is arranged.Because neutral resistor can be adsorbed a large amount of resonant energies, in the earthing mode of resistor is arranged, fundamentally suppressed the system resonance overvoltage.
As shown in Figure 2, the current transformer 4 that also is used for recording the ground connection record cell 3 of ground connection adjustable resistance 2 ground connection records in the resistor box body 1 of the present embodiment and is used for gathering ground connection adjustable resistance 2 electric currents, ground connection adjustable resistance 2 is by the primary side ground connection of current transformer 4, and the input of ground connection record cell 3 is connected with the secondary side of current transformer 4.The present embodiment can record the ground connection record of ground connection adjustable resistance 2 and add up by recording ground connection adjustable resistance 2 electric currents, can be convenient to the grounding function of transformer is diagnosed.
as shown in Figure 3, ground connection record cell 3 comprises the current sensor 31 that is connected successively, microprocessor 32, memory module 33 and communication interface modules 34, current sensor 31 is connected with the secondary side of current transformer 4, the current information that current sensor 31 flows through when gathering the ground connection of ground connection adjustable resistances 2 is also exported to microprocessor 32, microprocessor 32 generates the ground connection record according to the current information that receives and deposits memory module 33 in and according to control command, the ground connection record is passed through communication interface modules 34 outputs, can achieve a butt joint the ground connection situation of ground adjustable resistance 2 carry out on-line monitoring, be convenient to the field adjustable to transformer, very easy to use.In the present embodiment, microprocessor 32 adopts chip microcontroller, and memory module 33 adopts the FLASH memory module to realize, communication interface modules 34 is the RS232 serial communication modular.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is not limited in above-mentioned execution mode, and every technical scheme that belongs to the utility model principle all belongs to protection range of the present utility model.For a person skilled in the art, some improvements and modifications of carrying out under the prerequisite that does not break away from principle of the present utility model, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (3)
1. transformer neutral point earthing resistance cabinet, it is characterized in that: comprise the resistor box body (1) that adopts nonmetallic materials or nichrome to make, be provided with ground connection adjustable resistance (2) in described resistor box body (1), one end of described ground connection adjustable resistance (2) is connected with transformer neutral point, the other end ground connection of described ground connection adjustable resistance (2).
2. transformer neutral point earthing resistance cabinet according to claim 1, it is characterized in that: the current transformer (4) that also is used for recording the ground connection record cell (3) of ground connection adjustable resistance (2) ground connection record in described resistor box body (1) and is used for gathering ground connection adjustable resistance (2) electric current, described ground connection adjustable resistance (2) is by the primary side ground connection of current transformer (4), and the input of described ground connection record cell (3) is connected with the secondary side of current transformer (4).
3. transformer neutral point earthing resistance cabinet according to claim 2, it is characterized in that: described ground connection record cell (3) comprises the current sensor (31) that is connected successively, microprocessor (32), memory module (33) and communication interface modules (34), described current sensor (31) is connected with the secondary side of current transformer (4), the current information that described current sensor (31) flows through when gathering the ground connection of ground connection adjustable resistance (2) is also exported to microprocessor (32), described microprocessor (32) generates the ground connection record according to the current information that receives and deposits memory module (33) in and according to control command, the ground connection record is passed through communication interface modules (34) output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028988 CN203014372U (en) | 2013-01-06 | 2013-01-06 | Transformer neutral grounding resistor cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028988 CN203014372U (en) | 2013-01-06 | 2013-01-06 | Transformer neutral grounding resistor cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014372U true CN203014372U (en) | 2013-06-19 |
Family
ID=48605929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028988 Expired - Fee Related CN203014372U (en) | 2013-01-06 | 2013-01-06 | Transformer neutral grounding resistor cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203014372U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549308A (en) * | 2016-11-22 | 2017-03-29 | 国网山东省电力公司东营供电公司 | A kind of circuit interrupter grounding device and method |
| CN106597192A (en) * | 2016-11-21 | 2017-04-26 | 国网北京市电力公司 | Transformer grounding resistance device and method for detecting the same |
-
2013
- 2013-01-06 CN CN 201320028988 patent/CN203014372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597192A (en) * | 2016-11-21 | 2017-04-26 | 国网北京市电力公司 | Transformer grounding resistance device and method for detecting the same |
| CN106549308A (en) * | 2016-11-22 | 2017-03-29 | 国网山东省电力公司东营供电公司 | A kind of circuit interrupter grounding device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203503990U (en) | AC (alternating current) distribution box | |
| CN203014372U (en) | Transformer neutral grounding resistor cabinet | |
| CN202602264U (en) | Anti-interference microcomputer protective relaying device | |
| CN207124443U (en) | A kind of new energy taking device of transmission line of electricity | |
| CN202978733U (en) | Power distribution network device | |
| CN202488148U (en) | Low voltage intelligent reactive power compensation device | |
| CN208782501U (en) | A kind of double-fed wind power generator group | |
| CN203983954U (en) | Transformer neutral point is through circuit breaker parallel low resistance earthing device | |
| CN204989266U (en) | Smart electric meter with triple line is inhaled to magnetism | |
| CN207021570U (en) | A kind of short-circuit device for preventing Current Transformer Secondary current open | |
| CN203596264U (en) | Lightning-protection low-loss voltage-regulating distribution transformer | |
| CN202076712U (en) | Intelligent high/low-voltage power distribution unit | |
| CN203366966U (en) | Transformer capable of conducting double-voltage input or output | |
| CN201478833U (en) | Ore-smelting electric furnace short network of three-phase three-pole triangle structure | |
| CN205944857U (en) | Novel protection PT handcart | |
| CN205317886U (en) | Undercurrent earth fault route selection system | |
| CN206422530U (en) | A kind of anti-interference capacitor composite switching device | |
| CN206673381U (en) | A kind of plug-in multi-epitope distribution box | |
| CN107517581B (en) | Reduce the method for communication cable interference in substation using cable cover | |
| CN204758702U (en) | Utilize adjustable volume arc suppressing coil to measure device of electric wire netting direct -to -ground capacitance | |
| CN203535086U (en) | Multi-user centralized electric energy meter user module | |
| CN204758684U (en) | Pocket current indicator | |
| CN203910508U (en) | Outdoor anti-ferromagnetic resonance voltage transformer | |
| CN204068441U (en) | A kind of self adaptation electric energy collection device | |
| CN203135221U (en) | Composite through-wall sleeve having fuse |
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: 20130619 Termination date: 20160106 |