CN201277991Y

CN201277991Y - Chain high voltage sensing device

Info

Publication number: CN201277991Y
Application number: CNU2008200414257U
Authority: CN
Inventors: 李立; 张东旭
Original assignee: Wuxi Power Supply Co of Jiangsu Electric Power Co
Current assignee: Wuxi Power Supply Co of Jiangsu Electric Power Co
Priority date: 2008-08-26
Filing date: 2008-08-26
Publication date: 2009-07-22
Anticipated expiration: 2018-08-26

Abstract

The utility model relates to a chain-type high voltage sensor which can provide a reliable power supply for low power equipment, such as a data acquisition device, a communication device, and the like which are widely applied to remote monitoring systems of distribution network automation, and the like. The utility model is characterized in that a chain-type sensor is arranged in an insulated housing; a plurality of iron cores which are pairwise enlaced together in series are adopted in the chain-type sensor, so a common iron core part is formed; inductance windings, namely that coils enlaced by a sensor are arranged on two head-tail ends of the common iron core part and an enlaced iron core; the inductance windings, namely the coils are mutually arrayed in series to form a chain-type segment iron core; a secondary winding is simultaneously wound on the last inductance winding, namely the coil, therefore, low voltage can be safely output. The utility model has the advantages of convenient mass production, no need of special equipments, little idle load waste, small noise, energy saving and environment protection, and meets the need of reliable and independent power supply to prevent electric accidents and collect electric parameter signals for power supply departments and high voltage users.

Description

Chain high voltage sensing device

Technical field

The utility model relates to a kind of chain high voltage sensing device, and the low-power equipment such as data acquisition, communication device that specifically can be widely used in remote supervision systems such as distribution automation provides reliable source of power.

Background technology

Along with developing rapidly of China's urban and rural power grids construction, electric network composition is strengthened further and is perfect, new technology pilot and popularizations in succession such as urban distribution network automated system.For solving distribution electric parameter signals collecting and outdoor independent power supply reliably, simultaneously, for solving the demands such as indication of high voltage alive equipment, develop economical and practical, function admirable, volume is little and rationally (it is desirable to upright structures, floor area is little), high-voltage electrical apparatus parameter/power-type sensing device that cost is low, be that power grid construction has important topic to be solved always.

If adopt common voltage/current mutual inductor or induction type electric indicator, not only volume is big, cost is high, installation is inconvenient but also false triggering easily.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of chain high voltage sensing device is provided, and is convenient to produce in batches, need not specialized equipment, and cost is low; Open circuit loss is little, noise is low, energy-conserving and environment-protective, can satisfy power supply department and high pressure user and prevent accident of human electric shock and the independent demand of power supply reliably of electric parameter signals collecting needs.

The technical scheme that provides according to the utility model, comprise insulation crust, feature is that the chain type sensor is installed in the described insulation crust, described chain type sensor adopts several iron cores to connect in twos and bands together, form public iron core part, the inductance winding that is wound with sensor on public iron core part head and end and the iron core tied up is a coil, the inductance winding is that the mutual arranged in series of coil becomes the chain type segment core, at the last inductance winding is on the coil, be wound with a Secondary Winding simultaneously, in order to the low-voltage of output safety, utilize the no-voltage that has of the secondary winding of least significant end to judge whether high pressure is charged.

The magnetic flux that different coils produce in the same iron core of described public iron core part is an equidirectional.Described chain type segment core can adopt stacked, also can adopt volume iron core formula.

Described iron core is the square shape iron core.Described insulation crust adopts pillar porcelain bushing shell or silicone rubber sleeve.

Compared with the prior art the utility model has the following advantages:

1, owing to adopt chain structure, compare with traditional voltage/current mutual inductor, apparatus cost, volume, installation site all greatly reduce and save, and the measurement of electric parameter precision is not less than 1.0 grades.

2, because the insulating requirements between inner each iron leg core and the coil is lower, and iron core can with the respective coil equipotential, avoided electric potential floating, shelf depreciation etc. to be unfavorable for the factor that device moves reliably and with long-term.

3, whole device adopts series-mode frame, flexible configuration, and production cost is low, is fit to produce in batches, and is applied widely.

4, utilize the secondary no-voltage that has of electromagnetic component of least significant end to judge whether high pressure is charged, simultaneously, the secondary charge power supply that miniwatt (being not more than 5VA) is provided, for low-power equipments such as the data acquisition of remote supervision systems such as distribution automation, communication device provide reliable source of power, so have the dual-use function of " electrification in high voltage indication " and " miniwatt charge power supply " (being not more than 5VA) concurrently.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model contour structures synoptic diagram.

Fig. 3 is the wiring schematic diagram of the utility model device under central point non_direct ground situation.

Fig. 4 is the wiring schematic diagram of the utility model device under the direct ground connection situation of central point.

Embodiment

Following the utility model is further described middle in conjunction with the accompanying drawings embodiment:

Size of each segment core of the utility model (magnetoconductivity selection, core section and window size) and coil (conductor cross-section and the number of turn), (in batches, during producing in serial form, can produce each " standard segmentation " in batches) determined in designing requirements according to device voltage, electric parameter sampling request and charge power supply power etc." chain type " quantity is generally determined according to the height design of operating voltage.

As shown in Figure 1 and Figure 2: the chain type sensor comprises: square shape iron core 1, inductance winding are coil 2 and shell 3.With a certain electric pressure is example, and square shape iron core 1 (totally three), inductance winding are coil 2 (totally four).Along with the concrete condition of electric pressure and selected materials and structural design, the quantity of iron core and coil has nothing in common with each other, and in general, coil quantity is Duoed one than iron core quantity.

Described chain type sensor adopts three square shape iron cores 1 to connect in twos and bands together, form public iron core part, the inductance winding that is wound with sensor on public iron core part head and end and the iron core tied up is a coil 2, the inductance winding is that coil 2 mutual arranged in series become the chain type segment core, at the last inductance winding is on the coil 2, be wound with a Secondary Winding simultaneously,, utilize the no-voltage that has of the secondary winding of least significant end to judge whether high pressure is charged in order to the low-voltage of output safety.

The characteristics of the utility model sensor are: iron core adopts chain structure, and different with existing various current transformers or voltage transformer (VT) version, used iron core 1 is formed by the square shape iron core.Figure one connects " tying up " together in twos with three square shape iron cores, forms public iron core part.The inductance winding that is wound with sensor on public iron core is coil 2 (divide " telefault " and " diminishing coil " two kinds, a general coil in the near end is a diminishing coil, and all the other all are telefaults); Each inductance winding is serially connected in winding of high pressure (note polarity, should guarantee that the magnetic flux that different coils produce in the same core section is an equidirectional) mutually, and Here it is for it " chain type " arranges (shown in figure one, winding lead-out terminal of high pressure is A, O).On the inductance winding of near end, be wound with a low pressure Secondary Winding simultaneously (shown in figure one, low pressure Secondary Winding lead-out terminal is a, b), the potential indicator whether electricity is arranged as high pressure in order to the low-voltage (secondary winding is ground connection on one side) of step-down output safety, Secondary Winding is exported sizeable low-voltage simultaneously, is used for to miniwatt device power source charges.

Each chain type segment core can adopt stacked, also can adopt volume iron core formula (volume iron core formula open circuit loss is lower); Corresponding work winding and control winding adopt " prefabricated " (make separately, be inserted in iron core during assembling and get final product), or " circle is around formula " (must adopt special coil winding equipment), decide on user's request and production unit appointed condition.

The outside synoptic diagram of the utility model as shown in Figure 2, insulation crust 3 general pillar porcelain bushing shell or the silicone rubber sleeves of adopting.Chain type sensor shown in the figure one is placed pillar porcelain bushing shell or silicone rubber sleeve inside, the upright form of chain type sensor and the pillar of insulation crust make up dexterously, installation can not take up room, and its function both had been different from simple capacitance-voltage-distributing type high-voltage potential indicator, also was different from common PT, CT (voltage, current transformer).(3,4 connection terminals of representing the low pressure Secondary Winding respectively among Fig. 2, the low-voltage lead a of Fig. 1 diminishing coil, b are connected on 3,4 terminals).The upper and lower end parts of insulation crust has the internal thread of M12, connects A, the O lead-in wire of high-tension coil respectively.

The utility model electric hookup as shown in Figure 4.Fig. 4 is applicable to the central point direct grounding way.The high pressure extension line A of the first segment iron core of sensor is connected in top (adopting the M12 bolted); the top is connected with high-tension fuse RDa with protection again; high-tension fuse RDa is connected with high-voltage power supply A, and the bottom is adopted M12 bolted (identical with top structure) and ground connection equally.

Fig. 3 is applicable to central point non_direct ground mode.Respectively high-tension fuse RDa, RDb, the RDc of three sensor tops with protection usefulness is connected, high-tension fuse RDa, RDb, RDc are connected with power supply A, B, C respectively, after three sensor base are continuous, and ground connection again.Three Secondary Winding can insert power supply indication respectively, or the supply small-power power, also have one standby.This wiring is applicable to central point non_direct ground mode.

Claims

1, a kind of chain high voltage sensing device, comprise insulation crust (3), it is characterized in that installing in the described insulation crust (3) the chain type sensor, described chain type sensor adopts several iron cores (1) to connect in twos and bands together, form public iron core part, the inductance winding that is wound with sensor on public iron core part head and end and the iron core tied up is coil (2), the inductance winding is that the mutual arranged in series of coil (2) becomes the chain type segment core, at the last inductance winding is on the coil (2), be wound with a Secondary Winding simultaneously, in order to the low-voltage of output safety, utilize the no-voltage that has of the secondary winding of least significant end to judge whether high pressure is charged.

2, chain high voltage sensing device according to claim 1 is characterized in that the magnetic flux that different coils produce in the described public iron core same iron core (1) partly is an equidirectional.

3, chain high voltage sensing device according to claim 1 is characterized in that described chain type segment core can adopt stacked or employing volume iron core formula.

4, chain high voltage sensing device according to claim 1 is characterized in that described iron core (1) is the square shape iron core.

5, chain high voltage sensing device according to claim 1 is characterized in that described insulation crust (3) adopts pillar porcelain bushing shell or silicone rubber sleeve.