CN206876300U - A kind of cable connector core temp measuring system based on monitoring cable grounding electric current - Google Patents
A kind of cable connector core temp measuring system based on monitoring cable grounding electric current Download PDFInfo
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- CN206876300U CN206876300U CN201720867570.XU CN201720867570U CN206876300U CN 206876300 U CN206876300 U CN 206876300U CN 201720867570 U CN201720867570 U CN 201720867570U CN 206876300 U CN206876300 U CN 206876300U
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Abstract
It the utility model is related to a kind of cable connector core temp measuring system based on monitoring cable grounding electric current, including current transformer, cable grounding current monitoring device, online power supply unit and cable connector core temperature measuring equipment, the current transformer is arranged on cable grounding line, the cable grounding current monitoring device is connected electrically on the secondary side of current transformer, the input of the online power supply unit is connected electrically on the secondary side of current transformer, and the output end of the online power supply unit is connected electrically on the power interface of cable connector core temperature measuring equipment.The utility model has the characteristic of certain electric current using earth cable, one side carries out the monitoring of cable grounding electric current in the secondary side of current transformer, another aspect can produce an accessory power supply by online power supply unit in the secondary side of current transformer and be powered to cable connector core temperature measuring equipment, can solve the puzzlement brought in the prior art using battery and remote wiring power supply.
Description
Technical field
It the utility model is related to a kind of monitoring system of cable, and in particular to a kind of electricity based on monitoring cable grounding electric current
Cable joint core temp measuring system.
Background technology
High-tension cable metallic shield grounding electric current is one of important parameter for characterizing high-tension cable external insulation situation.Cause electricity
The abnormal principal element of cable earth current value has external force destructions, cross interconnected system wrong, ground wire to be stolen etc..Earth current
Value easily causes the rise of cable local temperature extremely, accelerates cable insulation aging, influences the current-carrying capacity of cable, increase circuit operation
Loss, it may cause high-tension cable that singlephase earth fault occurs and has a power failure when serious.Therefore, Monitoring High Voltage Cable metal sheath connects
Earth-current is of great significance.On the other hand, because piece cable has length limitation, it is therefore desirable to joint single hop
Cable connection get up, can be only achieved required length.In actual motion, high voltage power cable head is often in cable operation
Place that is most weak, being easiest to failure, actual motion show cable connector turn into influence cable power supply safety it is main because
Element.Before actual motion middle cable connector generation accident, often there is mid-winter, therefore carry out temperature measurement on-line to cable connector to be
Prevention and the effective means for reducing cable and junction malfunction.2 points for more than, industry have developed earth current on-line monitoring dress
Put and cable connector core temperature measuring equipment.But in specific application, because high-voltage cable joint is nearby given without low-tension supply
Cable connector core temperature measuring equipment is used, and many difficulties are caused to practical application.Cable connector core temperature measuring equipment at present
Generally use battery powered or remote low pressure cable power supply two ways.Battery powered, the finite capacity of battery, result in the need for through
Often change battery.Remote low pressure cable power supply is, it is necessary to lay low-voltage cable, and the requirement of remote wiring power supply is high, constructional difficulties, into
This is high.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of cable connector based on monitoring cable grounding electric current
Core temp measuring system, can solve often to change supplying cell and remote wiring supplies electricity to practical application and causes asking for many difficulties
Topic.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of electricity based on monitoring cable grounding electric current
Cable joint core temp measuring system, including current transformer, cable grounding current monitoring device, online power supply unit and cable connector
Core temperature measuring equipment, the current transformer are arranged on cable grounding line, the cable grounding current monitoring device electrical connection
On the secondary side of the current transformer, the input of the online power supply unit is connected electrically in the two of the current transformer
On secondary side, the output end of the online power supply unit is connected electrically on the power interface of the cable connector core temperature measuring equipment.
The beneficial effects of the utility model are：A kind of cable connector line based on monitoring cable grounding electric current of the utility model
Core temp measuring system often has the characteristic of certain electric current using earth cable, on the one hand carries out electricity in the secondary side of current transformer
The monitoring of cable earth current, one auxiliary electricity on the other hand can be produced by online power supply unit in the secondary side of current transformer
Source powers to cable connector core temperature measuring equipment, can solve to be stranded using what battery and remote wiring power supply were brought in the prior art
Disturb, the utility model is not required to more often change battery, reduces the frequency for changing battery, easy to use；Reduce remote wiring power supply
It is required that construction is simple, cost are cheap.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, in addition to protection circuit, the cable grounding current monitoring device and online power supply unit respectively lead to
The protection circuit is crossed to be connected electrically on the secondary side of the current transformer.
It is using the above-mentioned further beneficial effect of scheme：Protection circuit can realize the excessively stream to whole circuit, overvoltage
The protection such as protection, adds security of the present utility model.
Further, the online power supply circuit includes current rectifying and wave filtering circuit and rechargeable battery, the current rectifying and wave filtering circuit
Input is connected electrically on the secondary side of the current transformer, and the output end of the current rectifying and wave filtering circuit passes through the protection electricity
Road is connected electrically on the charging end of the rechargeable battery, and the discharge end of the rechargeable battery is connected electrically in the cable connector core
On the power interface of temperature measuring equipment.
It is using the above-mentioned further beneficial effect of scheme：Online power supply circuit includes current rectifying and wave filtering circuit and charging electricity
Pond, one dc source rechargeable battery is produced by current rectifying and wave filtering circuit in the secondary side of current transformer and supplements electricity, then led to
Overcharge battery is powered to cable connector core temperature measuring equipment.
Further, the cable grounding current monitoring device fills for the cable grounding electric current on-line monitoring of periodic running
Put.
It is using the above-mentioned further beneficial effect of scheme：Cable grounding current monitoring device uses service intermittent, can
, so, can be to filling although very small from Dc source power caused by Current Transformer Secondary side to reduce power consumption as far as possible
Battery carries out electricity supplement, so, can greatly prolong the service life of rechargeable battery, reduces the number for changing battery,
Reduce corresponding expense；System near the larger earth cable of portion of electrical current, it might even be possible to no longer change battery.
Further, the cable connector core temperature measuring equipment is the cable connector core temperature measuring equipment of periodic running.
It is using the above-mentioned further beneficial effect of scheme：Measuring circuit uses low consumption circuit, and service intermittent,
At interval of a period of time, measure, resting state is entered after measurement, to ensure low-down power consumption.
Brief description of the drawings
Fig. 1 is a kind of structural frames of the cable connector core temp measuring system based on monitoring cable grounding electric current of the utility model
Figure.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in figure 1, a kind of cable connector core temp measuring system based on monitoring cable grounding electric current, including Current Mutual Inductance
Device, cable grounding current monitoring device, online power supply unit and cable connector core temperature measuring equipment, the current transformer installation
On cable grounding line, the cable grounding current monitoring device is connected electrically on the secondary side of the current transformer, described
The input of online power supply unit is connected electrically on the secondary side of the current transformer, the output end of the online power supply unit
It is connected electrically on the power interface of the cable connector core temperature measuring equipment.
In this specific embodiment：
The online power supply circuit includes current rectifying and wave filtering circuit and rechargeable battery, the input electricity of the current rectifying and wave filtering circuit
It is connected on the secondary side of the current transformer, the output end of the current rectifying and wave filtering circuit is connected electrically in the rechargeable battery
On charging end, the discharge end of the rechargeable battery is connected electrically on the power interface of the cable connector core temperature measuring equipment.
The utility model also includes protection circuit, and the cable grounding current monitoring device and online power supply unit are respectively
It is connected electrically in by the protection circuit on the secondary side of the current transformer.The input of the current rectifying and wave filtering circuit passes through
The protection circuit is connected electrically on the secondary side of the current transformer.
The cable grounding current monitoring device is the cable grounding electric current on-Line Monitor Device of periodic running.The electricity
Cable joint core temperature measuring equipment is the cable connector core temperature measuring equipment of periodic running.
In a kind of cable connector core temp measuring system based on monitoring cable grounding electric current of the utility model, normal condition
The earth current of lower high-tension cable often has certain electric current, generally no greater than 30A, and the utility model utilizes this characteristic, on the one hand,
Cable grounding current monitoring is carried out using cable grounding current monitoring device in the secondary side of current transformer, on the other hand,
The secondary side of current transformer provides an accessory power supply by current rectifying and wave filtering circuit and charged to rechargeable battery, then passes through the electricity that charges
Pond powers to cable connector core temperature measuring equipment.Cable grounding current monitoring device uses low consumption circuit, and batch (-type) work
Make, at interval of a period of time, be monitored, resting state is entered after monitoring, to ensure low-down power consumption, monitoring interval
It can set, to ensure the real-time of monitoring.The output of the secondary side of current transformer, except entering cable grounding current monitoring
Outside device, also into current rectifying and wave filtering circuit, a dc source is exported, is available for rechargeable battery to supplement electricity, rechargeable battery is adopted
With the battery of low self-discharge rate, it is full of before installation.Joint core temperature measuring equipment equally uses periodic running, and average power consumption is very
It is low.
In this specific embodiment, protection circuit, current rectifying and wave filtering circuit and rechargeable battery are integrated in cable grounding electric current prison
Survey in device, if local except being provided with cable grounding current monitoring device, there is also mounted cable connector core temperature measuring equipment,
So cable grounding current monitoring device can is powered to cable connector core temperature measuring equipment.
A kind of cable connector core temp measuring system based on monitoring cable grounding electric current of the utility model utilizes earth cable
Often have the characteristic of certain electric current, on the one hand current transformer secondary side carry out cable grounding electric current monitoring, it is another
Aspect can produce an accessory power supply by online power supply unit in the secondary side of current transformer and give cable connector core thermometric
Device is powered, and can solve the puzzlement brought in the prior art using battery and remote wiring power supply, and the utility model can drop
The low frequency for changing battery, it is easy to use；The requirement of remote wiring power supply is reduced, construction is simple, cost are cheap.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (5)
- A kind of 1. cable connector core temp measuring system based on monitoring cable grounding electric current, it is characterised in that：Including Current Mutual Inductance Device, cable grounding current monitoring device, online power supply unit and cable connector core temperature measuring equipment, the current transformer installation On cable grounding line, the cable grounding current monitoring device is connected electrically on the secondary side of the current transformer, described The input of online power supply unit is connected electrically on the secondary side of the current transformer, the output end of the online power supply unit It is connected electrically on the power interface of the cable connector core temperature measuring equipment.
- 2. a kind of cable connector core temp measuring system based on monitoring cable grounding electric current according to claim 1, it is special Sign is：Also include protection circuit, the cable grounding current monitoring device and online power supply unit respectively pass through the guarantor Protection circuit is connected electrically on the secondary side of the current transformer.
- 3. a kind of cable connector core temp measuring system based on monitoring cable grounding electric current according to claim 2, it is special Sign is：The online power supply circuit includes current rectifying and wave filtering circuit and rechargeable battery, and the input of the current rectifying and wave filtering circuit leads to Cross the protection circuit to be connected electrically on the secondary side of the current transformer, the output end electrical connection of the current rectifying and wave filtering circuit On the charging end of the rechargeable battery, the discharge end of the rechargeable battery is connected electrically in the cable connector core temperature measuring equipment Power interface on.
- A kind of 4. cable connector core thermometric based on monitoring cable grounding electric current according to any one of claims 1 to 3 System, it is characterised in that：The cable grounding current monitoring device fills for the cable grounding electric current on-line monitoring of periodic running Put.
- A kind of 5. cable connector core thermometric based on monitoring cable grounding electric current according to any one of claims 1 to 3 System, it is characterised in that：The cable connector core temperature measuring equipment is the cable connector core temperature measuring equipment of periodic running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867570.XU CN206876300U (en) | 2017-07-17 | 2017-07-17 | A kind of cable connector core temp measuring system based on monitoring cable grounding electric current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720867570.XU CN206876300U (en) | 2017-07-17 | 2017-07-17 | A kind of cable connector core temp measuring system based on monitoring cable grounding electric current |
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| CN206876300U true CN206876300U (en) | 2018-01-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801502A (en) * | 2018-08-06 | 2018-11-13 | 广东电网有限责任公司 | A kind of 10kV cable intermediate joint core temperature monitoring devices based on temperature retrieval |
| CN111722155A (en) * | 2020-06-28 | 2020-09-29 | 上海感拓智能科技有限公司 | Cable joint fault monitoring system and monitoring method |
| CN114114086A (en) * | 2021-11-19 | 2022-03-01 | 贵州电网有限责任公司 | Cable connector wireless resistance temperature correlation testing device and using method thereof |
-
2017
- 2017-07-17 CN CN201720867570.XU patent/CN206876300U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801502A (en) * | 2018-08-06 | 2018-11-13 | 广东电网有限责任公司 | A kind of 10kV cable intermediate joint core temperature monitoring devices based on temperature retrieval |
| CN111722155A (en) * | 2020-06-28 | 2020-09-29 | 上海感拓智能科技有限公司 | Cable joint fault monitoring system and monitoring method |
| CN114114086A (en) * | 2021-11-19 | 2022-03-01 | 贵州电网有限责任公司 | Cable connector wireless resistance temperature correlation testing device and using method thereof |
| CN114114086B (en) * | 2021-11-19 | 2024-03-22 | 贵州电网有限责任公司 | Cable joint wireless resistance temperature correlation testing device and application method thereof |
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