CN212462792U - 10kV takes accuse special change terminal dual supply auto-change over device - Google Patents
10kV takes accuse special change terminal dual supply auto-change over device Download PDFInfo
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- CN212462792U CN212462792U CN202021513604.3U CN202021513604U CN212462792U CN 212462792 U CN212462792 U CN 212462792U CN 202021513604 U CN202021513604 U CN 202021513604U CN 212462792 U CN212462792 U CN 212462792U
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- 230000009977 dual effect Effects 0.000 title claims description 16
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 10
- 230000009466 transformation Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
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Abstract
A10 kV fee-control special transformer terminal dual-power switching device comprises a power switching relay, a low-voltage transformer and an air switch; the outlet end of the air switch is connected with the input end of the low-voltage transformer; the output end of the low-voltage transformer is connected with the input end of the power supply switching relay; the output end of the power supply switching relay is respectively connected with a collection terminal of a special transformer and a high-voltage metering device; the device realizes the switching of 100V and 57.5V power supplies through an air switch, a low-voltage transformer and a power supply switching relay, and achieves the automatic switching of the working power supplies of the meter and the acquisition terminal when a user decomposition switch is disconnected. The device is suitable for various acquisition terminals and has strong universality; the online rate of the acquisition terminal can be greatly improved, the dual-power supply transformation of the transported charge control metering terminal is facilitated, and the economical efficiency is high.
Description
Technical Field
The utility model relates to a 10kV takes accuse special change terminal dual supply auto-change over device belongs to electric wire netting power equipment technical field.
Background
At present, a 10kV fee control special transformer is provided with a user demarcation switch with a multi-winding PT power supply, the power side ends of the multi-winding PT power supply and a user decomposition switch are connected with a 10kV inlet wire, the load side end of a high-voltage circuit breaker is connected with a high-voltage metering box, and the high-voltage metering box is connected with a 10kV outlet wire.
The existing PT adopts multi-winding output, and a secondary side power supply of the PT is respectively connected with an intelligent ammeter and a special transformer acquisition terminal in a metering fee control box.
The prior technical scheme has the following defects: (1) at present, a voltage transformer configured by a user demarcation switch is generally a single winding, namely 220V output, at most two windings output, cannot meet the requirements of various types of meters and acquisition terminals, and is poor in universality. (2) The voltage transformer needs special requirements of users, and is high in manufacturing cost and low in economical efficiency. (3) For the cost control metering device with the stock in transportation, a user divides the voltage transformer and needs the user to put forward special requirements, the manufacturing cost is high, and the economy is not strong; and the PT secondary voltage of switch configuration only has 220V to lead to special change collection terminal working power to get as for the high-voltage metering box, will realize dual supply transformation to special change collection terminal and need change voltage transformer, the installation construction degree of difficulty is big, and is with high costs, need have a power failure to the user, and high-quality service pressure is big.
The problem is solved, need select reasonable scheme can conveniently carry out dual supply transformation to the special change acquisition terminal of stock operation, to newly-increased expense accuse metering device simultaneously, reduce its manufacturing cost, improve its commonality, be applicable to various types of table meter and acquisition terminal.
Disclosure of Invention
The utility model aims at, in order to solve the above-mentioned technical problem that the special change of current 10kV expense accuse exists, carry out dual supply transformation to the special change acquisition terminal of stock operation, to newly-increased expense accuse metering device simultaneously, reduce its manufacturing cost, improve its commonality, provide a 10kV expense accuse special change terminal dual supply auto-change over device.
Realize the technical scheme of the utility model as follows: a10 kV fee-control special transformer terminal dual-power switching device comprises a power switching relay, a low-voltage transformer and an air switch. The outlet end of the air switch is connected with the input end of the low-voltage transformer; the output end of the low-voltage transformer is connected with the input end of the power supply switching relay; the output end of the power supply switching relay is respectively connected with a collection terminal of a special transformer and a high-voltage metering device; the device realizes the switching of 100V and 57.5V power supplies through an air switch, a low-voltage transformer and a power supply switching relay, and achieves the automatic switching of the working power supplies of the meter and the acquisition terminal when a user decomposition switch is disconnected.
The inlet wire end of the air switch is connected with the output end of the voltage transformer of the single winding, and the output end outputs 220V voltage.
The voltage level of the voltage transformer is only one voltage level, namely 10/0.22 kV.
The utility model discloses an operating principle as follows, under normal conditions, the special voltage that becomes collection terminal and ammeter of expense control is provided by high-pressure metering device. When the high-voltage metering device loses power, the power is provided by a power supply provided by a potential transformer PT, wherein the PT power supply is processed in the process that an alternating current power supply 220V provided by the potential transformer is converted into a voltage of 100V or 57.5V through a low-voltage transformer to provide the power supply for the acquisition terminal, when the high-voltage metering device recovers power supply, a power supply change-over switch acts to recover the initial state, and the high-voltage metering provides a working power supply for the acquisition terminal.
The utility model has the advantages that the utility model can realize the output of 110V and 57.5V working power supply by adopting the 220V output of the single-winding voltage transformer under the principle of equal function and unchanged performance, can be suitable for various meters and acquisition terminals, has strong universality and can greatly improve the online rate of the acquisition terminals; the utility model discloses simplify the equipment requirement, can reduce the on-the-spot construction and installation degree of difficulty, reduced construction and installation cost.
The utility model is suitable for a various meters are convenient for realize dual supply transformation at the expense accuse measurement terminal of fortune.
Drawings
Fig. 1 is a schematic diagram of the dual power switching device of the 10kV cost-control special transformer terminal of the present invention;
FIG. 2 is a working schematic diagram of a 10kV fee-control special-purpose transformer terminal dual-power switching device;
in the figure, 1 is a voltage transformer; 2 is an air switch; 3 is a low voltage transformer; 4 is a power supply switching relay; 5 is an acquisition terminal; 6 is an ammeter; 7, a user demarcation switch (with a fee control function); and 8 is a high-pressure metering device.
Detailed Description
The embodiment provides a 10kV fee-controlled special transformer terminal dual-power switching device, as shown in fig. 1 and fig. 2.
In this embodiment, the dual power supply of the 10kV fee control special transformer terminal is switched on and replaced, the PT power supply 220V is directly connected to the auxiliary power supply 6 terminal of the electric meter, and when the high voltage metering device 8 loses power, the high voltage metering device still has a working power supply. After the PT power supply 220V is converted into 100V and 57.5V voltage through the low-voltage transformer 3, the power supply terminal of the special transformer acquisition terminal 5 is connected through the power supply switching relay 4, the special transformer acquisition terminal can be suitable for a three-phase three-wire system and a three-phase four-wire system special transformer acquisition terminal, when the high-voltage metering device 8 loses power or the user demarcation switch 7 is disconnected, the working power supply of the special transformer acquisition terminal 5 is automatically switched to be provided by the PT power supply, and the online rate of the special transformer acquisition terminal is improved.
The voltage transformer 1 does not need to provide special requirements for manufacturers, and only needs a single-winding voltage transformer matched with the user demarcation switch 7, so that the manufacturing cost is saved; simultaneously, to the special expense of changing of 10kV of stock operation accuse metering device, most of PT power are the single winding, and PT can't directly provide suitable working power supply for ammeter and acquisition terminal, and during dual power supply transformation, the voltage transformer who needs to change the multiconductor, the construction degree of difficulty is big, reforms transform with high costs, and high-quality service pressure is big, adopts the device can not cut off the power supply and change under the condition of voltage transformer, carries out dual power supply transformation to special change acquisition terminal, and economic nature is strong, and the commonality is strong.
Fig. 1 is a schematic diagram of installation of a dual power switching device of a novel cost control acquisition terminal, and the device mainly comprises the following core elements: the low-voltage transformer 3, the air switch 2 and the power switching relay 4 are common elements, have high cost performance and are high in economical efficiency when being used as a dual power supply transformation of the freight control metering device.
Fig. 2 is a schematic diagram of a dual power switching device of a collection terminal of a novel charge control special transformer, the working principle is that under normal conditions, the voltages of the collection terminal and an ammeter are provided by a high-voltage metering device, when the high-voltage metering device loses power, the voltage is provided by a power supply provided by a voltage transformer PT, wherein the PT power supply processing process is that 220V of an alternating current power supply provided by the voltage transformer is converted into 100V or 57.5V voltage by a low-voltage transformer to provide power for the collection terminal, when the high-voltage metering device recovers power supply, a power switching switch acts to recover the initial state, and the high-voltage metering provides a working power supply for the collection terminal.
In the embodiment of the utility model provides an in, electric loop connects as follows:
the voltage transformer 1 provides 220V PT power supply and is then connected to the air switch 2; a manual switch is connected between the air switch 2 and the low-voltage transformer 3; when the manual switch is not connected with the low-voltage transformer, the output end of the air switch 2 is directly connected to an auxiliary power supply terminal of the three-phase electric meter 6 through the manual switch; when the manual switch is connected with the low-voltage transformer, the output end of the air switch 2 is connected with the low-voltage transformer 3 and is converted into 100V or 57.5V output through the low-voltage transformer 3; and the power switching relay 4 is connected to a corresponding power terminal of the acquisition terminal 5 to be used as a standby power supply.
Under normal conditions, the high-voltage meter is used as a main power supply source to provide a working power supply for the acquisition terminal and the electric meter, wherein the voltage required by the three-phase three-wire system acquisition terminal is 100V, the voltage required by the three-phase four-wire system acquisition terminal is 57.5V, and the voltage required by the three-phase three-wire system meter and the four-wire system meter is 220V.
When the high-voltage metering device is out of power, the high-voltage metering device cannot provide a working power supply for the acquisition terminal and the ammeter, at the moment, the voltage transformer 1 supplies power, the power is converted into 100V or 57.5V through the low-voltage transformer 3, and the power is connected to a corresponding power terminal of the acquisition terminal through the power switching relay 4 to serve as a standby power supply.
Claims (5)
1. A10 kV fee-control special transformer terminal dual-power switching device is characterized by comprising a power switching relay, a low-voltage transformer, an air switch and a manual switch; the outlet end of the air switch is connected with a manual switch, and the manual switch is respectively connected with the input end of the low-voltage transformer and the intelligent electric meter; the output end of the low-voltage transformer is connected with the input end of the power supply switching relay; the output end of the power supply switching relay is respectively connected with a collection terminal of a special transformer and a high-voltage metering device; the device realizes 100V and 57.5V power switching through the power switching relay, realizes the dual power switching of the special transformer terminal, and achieves the automatic switching of the meter and the working power supply of the acquisition terminal when the user decomposition switch is disconnected.
2. The 10kV fee-control special transformer terminal double-power-supply switching device according to claim 1, wherein the incoming line end of the air switch is connected with the output end of a single-winding voltage transformer, and the output end outputs 220V voltage.
3. The dual-power switching device of the 10kV fee-controlled special transformer terminal as claimed in claim 1, wherein the output end of the low-voltage transformer outputs 100V and 57.5V.
4. The 10kV fee-control special transformer terminal double-power-supply switching device is characterized in that an outlet end of the air switch is directly connected with an auxiliary power supply terminal of a smart meter through a manual switch.
5. The 10kV fee-control special transformer terminal double-power-supply switching device according to claim 1, wherein the manual switch is used for switching an air switch to connect a low-voltage transformer or a smart meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021513604.3U CN212462792U (en) | 2020-07-28 | 2020-07-28 | 10kV takes accuse special change terminal dual supply auto-change over device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021513604.3U CN212462792U (en) | 2020-07-28 | 2020-07-28 | 10kV takes accuse special change terminal dual supply auto-change over device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212462792U true CN212462792U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021513604.3U Expired - Fee Related CN212462792U (en) | 2020-07-28 | 2020-07-28 | 10kV takes accuse special change terminal dual supply auto-change over device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212462792U (en) |
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2020
- 2020-07-28 CN CN202021513604.3U patent/CN212462792U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210202 Termination date: 20210728 |
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| CF01 | Termination of patent right due to non-payment of annual fee |