CN201937143U - Switching module of Roche electronic transformer - Google Patents

Abstract

The utility model relates to a transfer module of a Roche electronic transformer, which comprises a metal shell, one end of the shell is provided with an input terminal for connecting the coil outlet of the electronic transformer, and the other end of the shell is provided with an output connector for connecting a shielded cable , a protective snubber circuit is provided between the input terminal and the output connector. The adapter module of the utility model has strong applicability, small size and flexible installation, and effectively solves the problems of easy disconnection, messy wiring, and difficult grounding of Roche electronic transformers in current GIS and HGIS applications; the protection absorption in the adapter module The circuit has the functions of preventing fast transient overvoltage and preventing electromagnetic interference, which effectively avoids damage to the electronic circuit of the collector caused by external electromagnetic interference, and improves the output stability of the collector. The use of metal shells can shield space electromagnetic interference.

Description

Adapter modules for Roche electronic transformers

technical field

The utility model relates to the field of Roche electronic transformers, in particular to a transfer module between a coil outlet of the Roche electronic transformer and a collector.

Background technique

Rogowski electronic transformers, that is, electronic transformers based on Rogowski coils, can realize the measurement of large currents. Because of their large linearity in the measurement range, no current saturation, high measurement accuracy, low cost, and ease of use, they are widely used in smart substations. Wide application.

In the application of HGIS/GIS (combined electrical appliances), the Rogowski sensor coil installation methods of Rogowski electronic transformers are divided into two types: built-in type and external type. The built-in Rogowski coil is installed on the metal sleeve inside the high-pressure gas chamber of the GIS (the sleeve was originally the mounting bracket for the traditional transformer coil); the external Rogowski coil sensor head is installed on the external metal sleeve of the GIS (that is, directly set on the outside of the GIS tank).

The sensor outlet (that is, the secondary output signal wire of the sensor) needs to send the signal to the collector through a cable or wire. The method of use in the project is to strip the cable or wire, connect the cable core directly to the sensor outlet, and connect the cable or wire Connect to the collector. Using this method, the outgoing line of the sensor is easily disconnected, seriously affecting the normal operation of the equipment, and the wiring is messy and difficult to ground. Furthermore, in the operating environment of electronic transformers, there are many kinds of electromagnetic interference, such as lightning surge impact, line over-current impact, line over-voltage impact, electromagnetic interference caused by circuit breaker opening and closing, and isolation knife switch action. Electromagnetic interference, electromagnetic interference when the system is short-circuited to the ground, etc., various signals with strong energy, high frequency and great destructive power will be directly coupled to the weak current circuit of the collector through the transformer, which may cause damage to the electrical unit of the electronic transformer. The failure or damage of the collector makes the electronic circuit of the collector vulnerable to damage. What is more serious is that the temporary failure of the electronic circuit of the collector is easy to output wrong signals, which often causes the protection of the subsequent stage to malfunction and seriously affects the stability of the power system.

Utility model content

The purpose of the utility model is to provide an adapter module of a Roche electronic transformer, which is used to solve the problem that the Roche electronic transformer is easy to break when going out in current engineering applications.

In order to achieve the above object, the solution of the present utility model is: the adapter module of the Roche electronic transformer, the adapter module includes a metal shell, and one end of the shell shell is provided with an input terminal for connecting the coil outlet of the electronic transformer, and the shell The other end of the body is provided with an output connector for connecting a shielded cable, and a protective absorption circuit is provided between the input terminal and the output connector.

The adapter module of the utility model has strong applicability (both built-in and external types are applicable), small size, flexible and convenient installation, and effectively solves the problems of easy disconnection, messy wiring, and grounding of Roche electronic transformers in current GIS and HGIS applications. difficult question. The use of metal shells can shield space electromagnetic interference.

Further, the connection relationship of the protection absorbing circuit is as follows: the input connection terminal includes at least three input terminals, the output connector includes at least three output terminals, and the first input terminal is sequentially connected in series with the first magnetic bead, the first The inductor, the first output terminal, and the second input terminal are connected in series with the second magnetic bead, the second inductor, and the second output terminal, and the third input terminal is connected to a ground terminal, and a filter is provided between the first input terminal and the second input terminal. capacitor, a fast transient diode is connected between the first input terminal and the ground terminal, the anode of the fast transient diode is connected to the ground terminal, the cathode is connected to the first input terminal, and a series connection is arranged between the first output terminal and the second output terminal. Two combined capacitors, the connection point of the two combined capacitors is short-circuited with the ground terminal.

The protective absorbing circuit in the adapter module has the functions of preventing fast transient overvoltage and preventing electromagnetic interference, effectively avoiding damage to the electronic circuit of the collector caused by external electromagnetic interference, and improving the output stability of the collector.

Further, the input terminals are composed of jacks paralleled at one end of the shell, each input end of the input terminals corresponds to a jack, and each jack is provided with a press in the vertical direction. A wire hole, a wire crimping device is arranged in the wire crimping hole. The thread crimping device is a thread crimping screw that is screw-fitted with the thread crimping hole. The output connector is composed of a plug arranged at the other end of the shell, and each output end of the output connector corresponds to a pin of the plug. The protection absorbing circuit is arranged on the printed circuit board. Solid anti-vibration material is filled between the printed circuit board and the housing.

It is filled with anti-seismic materials to make the adapter module have better anti-seismic performance. The heat sink is assembled to improve the heat dissipation performance of the adapter module.

Description of drawings

Fig. 1 is the outline drawing of the utility model;

Fig. 2 is a schematic diagram of the electrical connection of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The adapter module of the Roche electronic transformer shown in Figure 1 includes a metal shell, and one end of the shell shell is provided with an input terminal composed of five jacks, and each jack is provided with a crimping hole 7 in the vertical direction , the crimping hole 7 is screwed with a crimping screw, and the other end of the shell corresponds to the jack with a plug 9 as an output connector, which is used to connect a shielded cable, and the shielded cable is connected to the electronic collector; the jack includes accommodating electronic The first jack 1, the second jack 2, and the third jack 3 fixedly connected to the ground terminal at the outlet end of the transformer coil. The plug includes a first pin, a second pin, and a third pin for connecting a shielded cable. Hole 3 and the third pin short-circuited by the ground terminal, a protective absorption circuit 6 is provided between the jack and the plug 9, the first jack 1 is connected in series with the first magnetic bead R1, the first inductor L1, and the first pin, The second jack 2 is connected in series with the second magnetic bead R2, the second inductance L2, and the second pin in sequence. There is a filter capacitor C1 between the first jack 1 and the second jack 2, and the first jack 1 is connected to the ground terminal. A fast transient diode D is connected between them, the anode of the fast transient diode D is connected to the ground terminal, and the cathode is connected to the first jack 1, and two combined capacitors C2, C3, the connection point of the two combined capacitors is shorted to the ground terminal.

When in use, insert the outgoing wires of the sensor into jacks 1 and 2, press them tightly with crimping screws, connect the plug to the shielded cable, and connect the shielded cable to the collector to realize the transfer. Moreover, the transfer module is small in size and flexible and convenient to install. The two reserved jacks 4 and 5 and the corresponding pins are mainly for the consideration of the double-coil input signal. If the double coil is connected, another set of corresponding protection absorbing circuit needs to be installed, and the structure is the same as above.

The protection absorbing circuit is composed of magnetic beads, fast transient diodes, combined capacitors and other components, which generate high-frequency electromagnetic waves in the event of lightning surge impact, isolation knife switch action, line over-current impact, line over-voltage impact, circuit breaker opening and closing, etc. In the case of interference, it absorbs interference signals and protects the reliable operation of the subsequent electronic circuits. The magnetic bead is made of ferrite material. Ferrite is a high-frequency magnetically conductive material with good high-frequency characteristics and nonlinear characteristics. It is widely used in high-frequency circuits. It does not affect the normal working current and is The steepness and amplitude of the interference signal can inhibit and attenuate its energy; the fast transient diode has a better absorption effect on the overvoltage signal; the combined capacitor short-circuits the input high-frequency interference signal to the ground. There is a solid grounding terminal in the adapter module to ground the signal line, and reduce the electromagnetic interference signal such as overvoltage to the allowable range through the above-mentioned protective absorption circuit to prevent it from harming the subsequent circuit. Through the comprehensive function of the above devices, it can reliably protect the normal operation of the subsequent electronic circuit. The power components in the module are installed in combination with the heat sink, which has a long service life. The circuit components in the adapter module are arranged on the printed circuit board. The circuit board is first sealed with a metal shell, and the solid anti-seismic material is poured in the middle, and the outside is encapsulated with epoxy resin, which has better anti-space electromagnetic interference, anti-seismic and anti-corrosion functions. .

Claims (7)

1. the interconnecting module of Luo Shi electric mutual inductor; it is characterized in that; described interconnecting module comprises a metal shell; case body one end is provided with the input terminal that is used to connect the outlet of electric mutual inductor coil; the housing other end is provided with the out connector that is used to connect shielded type cable, is provided with protection between described input terminal and the out connector and absorbs circuit.

2. the interconnecting module of Luo Shi electric mutual inductor according to claim 1; it is characterized in that; the annexation that described protection absorbs circuit is as follows: described input terminal comprises at least three inputs; described out connector comprises at least three outputs; first input end first magnetic bead of connecting successively; first inductance; first output; second input, second magnetic bead of connecting successively; second inductance; second output; the 3rd input connects an earth terminal; be provided with filter capacitor between the first input end and second input; be connected a fast transient diode between first input end and the earth terminal; this fast transient diode anode connects earth terminal; negative electrode connects first input end; be provided with two combination capacitors of connecting, two combination capacitor tie points and earth terminal short circuit between first output and second output.

3. the interconnecting module of Luo Shi electric mutual inductor according to claim 2, it is characterized in that, described input terminal is by constituting at described case body one end jack arranged side by side, the all corresponding jack of each input of described input terminal, the vertical direction of each jack is all logical to be provided with a line ball hole, and line ball is provided with cord grip in the hole.

4. the interconnecting module of Luo Shi electric mutual inductor according to claim 3 is characterized in that, described cord grip is the line pressing bolt that cooperates with line ball hole spiral.

5. the interconnecting module of Luo Shi electric mutual inductor according to claim 2, it is characterized in that, described out connector is made of the plug that is arranged on the described case body other end, and each output of described out connector is a contact pin of corresponding described plug all.

6. the interconnecting module of Luo Shi electric mutual inductor according to claim 2 is characterized in that, described protection absorbs circuit and is arranged on the printed circuit board.

7. the interconnecting module of Luo Shi electric mutual inductor according to claim 6 is characterized in that, is filled with solid-state anti-seismic material between described printed circuit board and the described housing.

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