CN203551621U - High-voltage dry-type metering box with three-phase four-wire system - Google Patents
High-voltage dry-type metering box with three-phase four-wire system Download PDFInfo
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- CN203551621U CN203551621U CN201320473654.7U CN201320473654U CN203551621U CN 203551621 U CN203551621 U CN 203551621U CN 201320473654 U CN201320473654 U CN 201320473654U CN 203551621 U CN203551621 U CN 203551621U
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Abstract
The utility model discloses a high-voltage dry-type metering box with a three-phase four-wire system. The high-voltage dry-type metering box with the three-phase four-wire system comprises a high-voltage wire incoming terminal, a high-voltage wire outgoing terminal, an integrated transformer, a junction box, a metering instrument chamber, an installation plate, a box body and grounding screws, wherein the integrated transformer is formed by combining three voltage transformers and three current transformers, and then integrally pouring epoxy resin; the high-voltage side of the integrated transformer is configured as a three-phase wire incoming terminal for a high-voltage power supply; the head ends of the secondary sides of the three voltage transformers are connected with the voltage terminal of a three-phase four-wire electric energy meter in the metering instrument chamber by the junction box, and the tail ends of the secondary sides of the three voltage transformers are all connected together to form the zero terminal of the metering box; the head ends and tail ends of the secondary sides of the three current transformers are connected with the current wire incoming terminal and the current wire outgoing terminal of the three-phase four-wire electric energy meter in the metering instrument chamber by the junction box; meanwhile, the tail ends of the three current transformers are connected with the zero terminal of the metering box respectively to form the three-phase four-wire structure of the metering box. The metering box has the characteristics of being maintenance-free and accurate in metering, and is an upgrading product of a high-voltage metering box.
Description
Technical field
The utility model relates to a kind of electric metering box, relates in particular to a kind of three-phase four-wire system high-voltage dry-type measuring box.
background technology
High-voltage measuring box is a kind of high-pressure side that is installed on supply transformer, is used for directly measuring the meritorious and reactive energy in high-tension line, for strengthening measuring control, and saves energy, electricity theft prevention is significant.Existing High-voltage measuring box is mostly three-phase three-wire system oil immersed type batch meter, this batch meter adopts three-phase two element, adopt two voltage transformer (VT) and two current transformers, during threephase load current imbalance in circuit, will produce larger error in dipping, voltage transformer (VT), current transformer in batch meter is to be immersed in the oil drum that is contained in a sealing for the insulating oil dispelling the heat simultaneously, volume is larger, safeguards inconvenient.
summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and accurate measurement, working service a kind of three-phase four-wire system high-voltage dry-type measuring box is easily provided.
For achieving the above object, this three-phase four-wire system high-voltage dry-type measuring box comprises that high pressure is into and out of line end, integral type mutual inductor, terminal box, measuring instrument chamber, installing plate, casing and grounding screw.
Further arrange, described integral type mutual inductor comprises three voltage transformer (VT), three current transformers, makes batch meter form three-phase four-wire system structure.The head end of transformer high voltage side be set to high-voltage power supply A, B, C three-phase into and out of line end, tail end is connected together and hold for floating, three voltage transformer (VT) and three current transformers are adopted to epoxy resin integral cast and are integrated, the high-pressure side of integral type mutual inductor arranges the three-phase turnover line end of power supply, and the secondary connection terminal of voltage transformer (VT) summation current transformer is set in the front of low-pressure side.
Further arrange, in the front of integral type mutual inductor, be provided with the secondary outlet terminal of voltage transformer (VT) summation current transformer, i.e. 3 voltage transformer (VT) and 3 head that current transformer is secondary, tail end, three head ends that voltage transformer (VT) is secondary are connected with the three-phase and four-line active electric energy meter of measuring instrument chamber and three voltage input terminals of reactive energy-meter by terminal box, the secondary all tail ends of voltage transformer (VT) are connected together and become the zero line side of batch meter, three secondary head ends of current transformer are connected with the three-phase and four-line active electric energy meter of metering house and three electric current input terminals of reactive energy-meter by terminal box, three secondary tail ends of current transformer are connected with the three-phase and four-line active electric energy meter of metering house and three electric current outlet terminals of reactive energy-meter by terminal box, three tail ends are connected with the zero line side of batch meter respectively simultaneously, form like this three-phase four-wire system structure of batch meter.
Further arrange, described integral type mutual inductor is fixed on installing plate, by installing plate, be fixed in the casing of batch meter, terminal box, measuring instrument chamber is arranged on the front of metering casing, three-phase power electric energy meter, it is indoor that reactive energy-meter is fixed on measuring instrument, measuring instrument chamber has rainproof function, in front, be provided with view window, by view window, can be clear that the counting of the inside electric energy meter, measuring instrument case is provided with special door lock simultaneously, managerial personnel by batch meter control, in the bottom of batch meter, protective ground screw is set, after installing for batch meter, be connected with the ground wire of transformer.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment front elevation.
Fig. 2 is the utility model embodiment vertical view.
Fig. 3 is the utility model embodiment cut-away drawing.
Embodiment
As Figure 1-3, specific embodiment of the utility model is a kind of three-phase four-wire system high-voltage dry-type measuring box, comprises high pressure end of incoming cables 1, measuring instrument case 2, terminal box 3, casing 4, grounding screw 5, integral type mutual inductor 6, mutual inductor installing plate 7, described integral type mutual inductor 6 comprises three voltage transformer (VT), three current transformers, make batch meter form three-phase four-wire system structure, and described three voltage transformer (VT) and three current transformers are such wiring: voltage transformer (VT) high-pressure side head end is set to high-voltage power supply A, B, the end of incoming cables AP1 of C three-phase, BP1, CP1, its three tail end groups are connected together simultaneously, and three voltage transformer (VT) are adopted together with three current transformer combinations to epoxy resin integral cast and be integral type mutual inductor 6, the top of integral type mutual inductor 6 is set to the three-phase end of incoming cables of high-voltage power supply, the secondary connection terminal of voltage transformer (VT) summation current transformer is set, three secondary head end at1 of voltage transformer (VT) in the positive lower end of integral type mutual inductor 6, bt1, ct1 connects the voltage terminal 1 of terminal box 3, 5, No. 9, three tail end at2 that voltage transformer (VT) is secondary, bt2, ct2 connects together and forms the zero line side of batch meter, three secondary head end as1 of current transformer, bs1, cs1 connects the current terminal 2 of terminal box 3, 6, No. 10, three tail end as2 that current transformer is secondary, bs2, cs2 connects terminal box current terminal 4, 8, No. 12, simultaneously its tail end is connected with the zero line side of batch meter respectively, the output terminal of terminal box 3 respectively with the three-phase and four-line active electric energy meter 7 of measuring instrument case 2, reactive energy-meter 8 is connected, and like this, batch meter forms three-phase four-wire system structure, even if there is zero line to form current path and make accurate measurement when threephase load is uneven.The effect of terminal box 3 is to need measurement verification and from measuring instrument case unloads, the secondary of mutual inductor given to short circuit with brace when electric energy meter, avoids the secondary open circuit of mutual inductor and produces high pressure.
Further arrange, described integral type mutual inductor 6 is fixed on the bottom of the casing 4 of batch meter by installing plate 7, terminal box 3, measuring instrument chamber 2 is arranged on the front of batch meter, at the indoor three-phase and four-line active electric energy meter 7 that is provided with of measuring instrument 2, reactive energy-meter 8, measuring instrument chamber 2 has rainproof function, in front, be provided with view window, by view window, can be clear that the counting of the inside electric energy meter, measuring instrument chamber 2 is provided with special door lock simultaneously, managerial personnel by batch meter control, in the bottom of batch meter, protective ground screw 5 is set, after installing for batch meter, be connected with the ground wire of transformer.
Claims (1)
1. a three-phase four-wire system high-voltage dry-type measuring box, is characterized in that: described batch meter comprises high pressure input terminal, high-voltage outlet terminal, integral type mutual inductor, terminal box, measuring instrument chamber, installing plate, casing and grounding screw, described integral type mutual inductor is by three voltage transformer (VT), after three current transformer combinations, by epoxy resin integral cast, formed, the high-pressure side of integral type mutual inductor is set to high-voltage power supply three-phase and enters, leading-out terminal, the front of integral type mutual inductor arranges the secondary outlet terminal of voltage transformer (VT) summation current transformer, and the secondary head end of three voltage transformer (VT) is by the three-phase and four-line active electric energy meter of terminal box and measuring instrument chamber, the voltage end of reactive energy-meter is connected, and its secondary tail end all links together and forms the zero line side of batch meter, three head that current transformer is secondary, tail end is by the three-phase and four-line active electric energy meter of terminal box and measuring instrument chamber, the electric current of reactive energy-meter enters, leading-out terminal is connected, and its tail end is connected with the zero line side of batch meter respectively simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320473654.7U CN203551621U (en) | 2013-07-30 | 2013-07-30 | High-voltage dry-type metering box with three-phase four-wire system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320473654.7U CN203551621U (en) | 2013-07-30 | 2013-07-30 | High-voltage dry-type metering box with three-phase four-wire system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551621U true CN203551621U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320473654.7U Expired - Lifetime CN203551621U (en) | 2013-07-30 | 2013-07-30 | High-voltage dry-type metering box with three-phase four-wire system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551621U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388341A (en) * | 2015-11-27 | 2016-03-09 | 国网北京市电力公司 | Metering box |
| CN109212286A (en) * | 2018-09-27 | 2019-01-15 | 广东电网有限责任公司 | A kind of generator car mobile metering device |
| CN112162129A (en) * | 2020-09-24 | 2021-01-01 | 贵州电网有限责任公司 | Sealed metering terminal device for electric power system |
-
2013
- 2013-07-30 CN CN201320473654.7U patent/CN203551621U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388341A (en) * | 2015-11-27 | 2016-03-09 | 国网北京市电力公司 | Metering box |
| CN109212286A (en) * | 2018-09-27 | 2019-01-15 | 广东电网有限责任公司 | A kind of generator car mobile metering device |
| CN112162129A (en) * | 2020-09-24 | 2021-01-01 | 贵州电网有限责任公司 | Sealed metering terminal device for electric power system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |