CN203025343U - Compound type intelligent terminal junction device - Google Patents

Abstract

The utility model discloses a composite intelligent terminal wiring device for measuring and verifying electric energy meters in secondary circuits of electric power systems. The composite intelligent terminal junction box is installed in the metering screen cabinet of the substation, the top terminal is connected to the electric energy meter of the billing gateway, the bottom terminal is connected to the secondary metering circuit of the substation, and the composite socket in the middle is connected to the integrated intelligent wiring plug. It is connected with the safe meter changing plug, the integrated intelligent wiring plug is used for on-site calibration of the watt-hour meter, the safe meter changing plug is used for the replacement of the watt-hour meter, and the composite intelligent terminal junction box adopts the current secondary circuit measurement calibration. A composite socket with a quick connector structure is used in the test, and the composite socket in the middle of the composite intelligent terminal junction box is composed of 10 shunt sockets. The utility model has the advantages of safe operation, high working efficiency, saving working time and the like.

Description

Composite intelligent terminal wiring device

technical field

The utility model relates to a wiring device of a power system, more specifically, the utility model is a terminal wiring device used for measuring and checking a secondary circuit of a current.

technical background

Various measuring and testing instruments are installed in power transmission and distribution stations, and these instruments are connected to the electrical secondary circuit. At present, most of the watt-hour meters used as legal measuring instruments are connected with the secondary measuring circuit of the substation by using a joint terminal junction box to transmit The voltage and current signals are connected by screws and metal slides. The watt-hour meter as a legal measuring instrument must be regularly inspected and calibrated. The traditional test and calibration method is to use a calibrated watt-hour meter. Go to the site to replace the watt-hour meter that needs to be calibrated, bring the replaced watt-hour meter back to the testing station, and calibrate it in stages and batches. After the calibration test is completed, return to the site for the second time and put the watt-hour meter back to the original place . During the replacement process, in order to ensure that the current loop is always in a short-circuit state (not open), it is necessary to strictly follow the relevant regulations, and there are certain requirements for the operator, but there are still cases of errors. Moreover, the metal terminals are exposed and need to be manually toggled, which poses a large safety hazard. There have been many safety accidents in the past. In order to fundamentally solve the above problems, it is necessary for those skilled in the art to realize on-site verification without affecting the normal operation of the circuit or to make the operation of meter replacement simple, rapid and efficient under the premise of ensuring the safety of equipment and personnel. Technical issues to be solved.

Utility model content

The purpose of this utility model invention is to overcome the deficiencies of the prior art, improve labor production efficiency, and design a composite intelligent terminal wiring device for on-site test verification or replacement of electric meters, which can effectively avoid possible equipment and Personal insecurity.

The purpose of the utility model invention is achieved through the following technical solutions:

A composite intelligent terminal wiring device installed in the metering panel cabinet of a substation, which is composed of a composite intelligent terminal junction box, an integrated intelligent wiring plug and a safety meter changing plug. The composite intelligent terminal junction box is installed in the substation metering panel cabinet In the middle, the top terminal is connected to the electric energy meter at the billing gateway, the bottom terminal is connected to the secondary metering circuit of the substation, and the composite socket in the middle is connected to the integrated intelligent wiring plug and the safety meter replacement plug. The integrated intelligent wiring plug is used for electricity The on-site calibration of the meter, the safety-type meter replacement plug is used for the replacement of the watt-hour meter, the composite intelligent terminal junction box adopts a composite socket with a quick connector structure for current secondary circuit measurement and verification, and the middle of the composite intelligent terminal junction box The composite socket is composed of 10 shunt sockets, each of which is insulated from each other. There are 10 sets of double reeds in the composite socket of the composite intelligent terminal junction box. The double reeds of the composite socket are divided into upper and lower pieces, which are respectively bent into The front and rear contact surfaces, the upper and lower reeds conduct through the front and rear contact surfaces. When the on-site watt-hour meter is calibrated, the plug is inserted in the way of shunting first and then connecting in series. When the plug is inserted into the previous row of reeds, The circuit under test is still running normally. At this time, the standard meter has been connected in series to form a shunt branch. When the plug continues to be inserted to the last row of reeds, the standard meter is completely connected to the circuit under test, which can avoid The contact is unstable when inserted, and the current circuit of the trigger gap formed is open circuit. The integrated smart wiring plug is composed of 10 shunt plugs, each shunt plug is insulated from each other. The front end of the terminal matches the socket on the composite intelligent terminal wiring device. When in use, the plug is inserted into the socket, and the terminal is connected to the external calibration instrument through a wire.

Compared with the prior art, the utility model has the following beneficial effects:

1. Safe and reliable operation;

2. High work efficiency, saving operation time.

Description of drawings

Figure 1 is the outline drawing of the compound intelligent terminal junction box

Figure 2 Outline drawing of integrated smart wiring plug

Figure 3 is a schematic diagram of the composite intelligent terminal junction box socket structure

Among the figure: top terminal 1, bottom terminal 2, composite socket 3, upper reed 4, lower reed 5, plug 6, terminal 7 and safety cover 8.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the content of the present utility model is described in further detail:

Figure 1 and Figure 2 are the appearance diagrams of the composite intelligent terminal junction box and the integrated intelligent wiring plug. The composite intelligent terminal wiring device is composed of a composite intelligent terminal junction box, an integrated intelligent wiring plug and a safe meter-changing plug. The composite intelligent terminal junction box is installed in the metering cabinet of the substation. The top terminal 1 is connected to the electric energy meter of the billing gateway to read signals such as voltage, current, pulse, and communication. The bottom terminal 2 is connected to the secondary metering circuit of the substation. The voltage and current signals are transmitted, and the composite socket 3 connected with the plug is in the middle. There are 10 sets of double reeds in the composite socket 3 of the compound intelligent terminal junction box. The integrated smart wiring plug includes a plug 6, a terminal 7 and a safety cover 8. The terminal of the integrated smart wiring plug is connected to the current school device through a cable. When the plug is inserted into the junction box, the conversion of the voltage and current loops is completed to ensure that the voltage loop Short circuit, the current loop is not broken, and all the terminals on the top of the junction box are de-energized, which can make the equipment safe and carry out on-site verification to ensure the safety of the equipment and the safety of the personnel who perform the meter replacement operation. There are 10 groups of double spring contacts in the junction box of the compound intelligent terminal. In the normal working state, the upper and lower parts of each group of contacts are in the conduction state, and the voltage and current signals from the secondary metering circuit can directly flow through the contacts to the three. Related port electric energy meter.

The following will further illustrate the working principle of the composite intelligent terminal wiring device through examples:

When performing on-site calibration of the three-correlation watt-hour meter:

a) Transmission of voltage signal

The on-site verification acquisition of the voltage signal adopts a parallel connection method, and the voltage signal is connected in parallel to the voltage input terminal of the on-site verification device. During the insertion process of the terminal of the integrated intelligent wiring plug, the upper and lower two copper sheets are connected in parallel through the voltage short wiring, and paralleled. It is transmitted to the voltage input terminal of the current calibration device, and at the same time, the front and rear double reed structures are opened successively. This structure makes the voltage signal always transmitted to the gate electric energy meter, and also enables the on-site calibration device to collect the voltage signal. The voltage signal is always connected during the whole process (the voltage is not short-circuited).

b) Transmission of current signal

The on-site verification acquisition of the voltage signal adopts a series connection method, and the voltage signal is connected in series to the voltage input terminal of the on-site verification device. During the insertion process of the terminal of the integrated intelligent wiring plug, the upper and lower copper pieces are respectively connected to the current input and output terminals of the on-site calibration device through wires, wherein: when the copper piece pushes against the first set of double reeds, the current signal shunts To the on-site calibration device, the second set of double reeds keeps in contact, and the electric energy meter at the gate is kept to obtain the current signal normally; the plug continues to be inserted forward, and the copper piece pushes away the second set of double reeds, at this time all the current signals are switched to the on-site calibration device , and then flow to the gate energy meter, the gate energy meter and the on-site calibration device still keep obtaining the current signal. The current signal is always connected during the whole process (the current is not broken).

When changing the meter of the three-correlation port electric energy meter:

Transmission of voltage signals There is no voltage short connection in the safe meter changing plug. The upper and lower copper pieces are insulated and disconnected. After the plug is inserted into the composite intelligent terminal junction box, only the lower copper piece contacts the lower ends of the front and rear double reeds. , the voltage signal from the secondary metering circuit is kept, and the upper copper sheet to the three-correlation port electric energy meter is in a disconnected state without any voltage signal, which ensures that the operator will not have any problems when the electric energy meter at the loading and unloading gate needs to be screwed. Any risk of electric shock ensures the safety of personnel. The current loop in the safety-type meter changing plug has a current short connection, and its function is to switch the current loop. Normal operation is that the current signal from the secondary metering circuit flows in from the current input terminal of the compound intelligent terminal junction box to the current input terminal of the three-correlation watt-hour meter, and then passes through the compound terminal intelligent junction box from the output terminal of the pass watt-hour meter. Flow back to the secondary metering circuit, the whole circuit is a complete current loop. Therefore, when the meter is changed, the current signal no longer flows through the three-correlation port electric energy meter, but only flows through the junction box of the composite intelligent terminal. Therefore, the copper piece under the current input and output terminals of the safe meter changer plug uses a current short circuit. Connect, so that the current signal from the secondary metering circuit passes through here, and all the parts from the upper part to the gateway electric energy meter are disconnected. During the whole process, the current signal of the secondary metering circuit is always connected (the current is not disconnected).

Claims (4)

1. A composite intelligent terminal wiring device, which is composed of a composite intelligent terminal junction box, an integrated intelligent wiring plug and a safety meter changing plug. The composite intelligent terminal junction box is installed in the metering cabinet of the substation. The electric energy meter at the fee gate is connected, the bottom terminal is connected with the secondary metering circuit of the substation, and the composite socket in the middle is connected with the integrated intelligent wiring plug and the safety meter changing plug. It is characterized in that: the composite intelligent terminal junction box adopts the current secondary circuit A composite socket with a quick connector structure for measurement and verification. The composite socket in the middle of the compound intelligent terminal junction box is composed of 10 shunt sockets, and each shunt socket is insulated from each other. 2. A compound intelligent terminal wiring device according to claim 1, characterized in that: there are 10 sets of double reeds in the composite socket of the compound intelligent terminal junction box, and the double reeds of the composite socket are divided into two pieces, which are folded separately. It is bent into two front and rear contact surfaces, and the upper and lower reeds are conducted through the front and rear contact surfaces. 3. A composite intelligent terminal wiring device according to claim 1, wherein the integrated intelligent terminal plug is composed of 10 branch plugs, and the branch plugs are insulated from each other. 4. A compound intelligent terminal wiring device according to claim 1, characterized in that: the front end of the integrated intelligent terminal plug has a three-layer planar structure, the upper and lower layers are respectively conductive metal sheets, and the middle is an insulating layer.

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