CN209692232U - A kind of switch cabinet of converting station with output loop protection - Google Patents

Abstract

The utility model provides a kind of switch cabinet of converting station with output loop protection, including cabinet body, the secondary device that primary equipment and the operating condition for primary equipment are measured and monitored is provided in cabinet body, status signal isolating and protecting device is connected between primary equipment and secondary device, status signal isolating and protecting device includes shell, status signal isolation circuit is provided in shell, status signal isolation circuit includes photoisolator, the input terminal connection signal input interface of photoisolator, the output end of photoisolator is sequentially connected triode signal amplification unit, relay and signal output interface；The signal input interface is used to connect the auxiliary contact of primary equipment, and the signal output interface is for connecting secondary device.The switchgear of the utility model realizes the effective protection to secondary device, greatly reduces the damage and failure rate of secondary device, improves the stability that switchgear uses, reduces costs simultaneously.

Description

A kind of switch cabinet of converting station with output loop protection

Technical field

The utility model relates to switch cabinet equipments, and in particular to a kind of switch cabinet of converting station with output loop protection.

Background technique

With the construction and development of power grid, 6KV, 10kV, 35kV high-tension switch cabinet quantity are also being continuously increased, this but also The Intelligent control device, switch status display device, the use of conformable display that secondary device is integrated in switchgear are more extensive. These products can be measured, monitor, control and be protected to the operating condition of primary equipment and system.

Intelligent control device simplifies cabinet body wiring, has beautified cabinet face layout, has improved the class of cabinet body, allow high-voltage switch gear Cabinet working condition is very clear.However since switch cabinet body is high-pressure installation, electromagnetic interference is inevitable, especially in cabinet Breaker, moment generates the generated damage pole of pulse and thunder and lightning to secondary device when the element manipulations such as earthing switch Greatly, the impaired maximum in manipulation status display part.Additionally due to the auxiliary of primary equipment state instruction in Intelligent control device circuit Adjuvant grafting point longtime running is that 24V light current is opened into so that Intelligent switch cabinet control is set in high-voltage board strong-electromagnetic field environment Standby status indication section failure rate greatly increases.

Utility model content

Purpose of the utility model is to solve the above problems and provide a kind of transformer substation switch with output loop protection Cabinet reduces the failure rate of secondary device to protect secondary device, to reduce cost.

The purpose of this utility model, which is achieved in that, provides a kind of switch cabinet of converting station with output loop protection, Including cabinet body, be provided with primary equipment in cabinet body and the operating condition for primary equipment measure and monitor it is secondary Equipment is connected with status signal isolating and protecting device, status signal insulation blocking dress between the primary equipment and secondary device Set including shell, be provided with status signal isolation circuit in shell, status signal isolation circuit includes photoisolator, photoelectricity every Input terminal connection signal input interface from device, the output end of photoisolator be sequentially connected triode signal amplification unit, after Electric appliance and signal output interface；The signal input interface is used to connect the auxiliary contact of primary equipment, the letter by conducting wire Number output interface is used to connect secondary device by conducting wire.

Preferably, LED light is parallel on the relay, the LED light is installed on the shell.

Preferably, current-limiting resistance is in series in the LED light.

Preferably, the signal input interface is multiple, and the side of shell, the signal output interface is arranged in arrangement Quantity is corresponding with signal input interface quantity, and the other side of shell is arranged in arrangement, and each signal input interface and signal are defeated Outgoing interface corresponds to a status signal isolation circuit.

Preferably, the auxiliary contact of the primary equipment includes the auxiliary of breaker, trolley, earthing and spring energy-storage switch Adjuvant grafting point, corresponding, the secondary device includes being used for circuit-breaker switching on-off state instruction, trolley position instruction, earthing switch The component of state instruction and the instruction of switch spring energy storage state.

Preferably, input signal indicator light is parallel on the input circuit of the photoisolator.

Preferably, multiple mounting holes are offered on the shell, shell to be mounted on to the cabinet of switchgear by screw In vivo.

Preferably, the shell uses metal material.

Compared to the existing high-tension switch cabinet for substation, switchgear provided by the utility model passes through in primary equipment The access state signal isolation protective device between secondary device, realizes the effective protection to secondary device, can be greatly reduced The damage and failure rate of secondary device, improve the stability that switchgear uses, reduce costs simultaneously.

Detailed description of the invention

Fig. 1 is the attachment structure schematic diagram of the switchgear of the utility model embodiment；

Fig. 2 is the status signal isolating and protecting device schematic diagram of the utility model embodiment；

Fig. 3 is another schematic diagram of status signal isolating and protecting device shown in Fig. 2；

Fig. 4 is a status signal isolation circuit schematic diagram of the utility model embodiment.

Appended drawing reference

1- shell, 2- signal input interface, 3- signal output interface, 4-LED lamp, 5- mounting hole.

Specific embodiment

In the following with reference to the drawings and specific embodiments, switchgear provided by the utility model is explained in detail, it should Illustrate, the embodiments of the present invention is not limited to following embodiment.

Refering to fig. 1 shown in -4, the utility model provides following examples:

A kind of switch cabinet of converting station with output loop protection, including cabinet body, be provided in cabinet body primary equipment and The secondary device for measuring and monitoring for the operating condition to primary equipment connects between the primary equipment and secondary device It is connected to status signal isolating and protecting device, status signal isolating and protecting device includes shell 1, is provided with status signal in shell 1 Isolation circuit, status signal isolation circuit include photoisolator, the input terminal connection signal input interface 2 of photoisolator, The output end of photoisolator is sequentially connected triode signal amplification unit, relay and signal output interface 3；The signal is defeated Incoming interface is used to connect the auxiliary contact of primary equipment by conducting wire, and the signal output interface is secondary for being connected by conducting wire Equipment.

It should be noted that the secondary device can be the existing Intelligent control dress for being integrated with a variety of secondary devices It sets, switch status display device or conformable display, it is Intelligent control device that secondary device is illustratively given in Fig. 1.Into One step, for the use for matching Intelligent control device, it is defeated that multiple signals are provided on the shell of the isolating and protecting device Incoming interface can input a signal into the side that shell is arranged in interface arrangement, and in the arrangement setting of the other side of the shell and institute State the corresponding signal output interface of signal input interface quantity.Each signal input interface and the corresponding shape of signal output interface State signal isolation circuit.As specifically, the auxiliary contact of the primary equipment includes breaker, trolley, earthing and spring The auxiliary contact of energy storage switch, corresponding, the secondary device includes referring to for circuit-breaker switching on-off state instruction, small truck position Show, the component of earthing switch state instruction and switch spring energy storage state instruction.By taking above-mentioned primary equipment as an example, the present embodiment The output loop working principle of middle switchgear are as follows: the state letter taken from the auxiliary contact of the elements such as breaker, trolley, earthing It number is linked into status signal isolating and protecting device and (is linked into the input terminal of photoisolator), be isolated from status signal and protect The signal of protection unit output is linked into the status display route of Intelligent control device, and realizes state by corresponding instrument The display of information.In this process, have plenty of normally opened signal from the status signal that the auxiliary contact of primary equipment is taken, have plenty of Normally closed signal.But these components are typically powerful, can all there is high current and big voltage at work, state switching Moment is also easy to produce electric arc, pulse and thunder and lightning, therefore, by the way that photoisolator is arranged, can export primary equipment end Electric signal (status signal) is converted into optical signal, then exports after converting optical signal into electric signal to secondary device, thus reaches The effect of insulation blocking, avoids direct impact of the output signal to secondary device of primary equipment.Photoisolator belongs to Mature existing device, does not do herein about its specific structure and principle and excessively repeats.Further, since photoisolator is defeated Current signal out is smaller, therefore first passes through triode signal amplification unit and put the current signal that photoisolator exports It is defeated by relay afterwards again greatly.Specifically, as shown in figure 4, triode signal amplification unit includes triode Q1, photoisolator Output end passes through resistance R1 and R2 respectively and connect with the base stage of triode Q1 and emitter, and the collector of triode connects relay Device.

Preferably, LED lamp 4 is installed on the shell as shown in figure 4, being parallel with LED light 4 on the relay On.As a result, when stateful signal is input to isolating and protecting device by corresponding signal input interface, the corresponding shape of the interface The conducting of state signal isolation circuit, corresponding LED light 4 is shinny, thus plays the role of instruction.Further, in the LED light 4 It is also in series with current-limiting resistance R3, for protecting the LED light 4.

Preferably, be parallel with input signal indicator light on the input circuit of the photoisolator, as specifically, The input signal indicator light can be parallel to the luminescent device in photoisolator.The program can be used for solving a kind of to deposit The problem of: when the corresponding photoisolator of a certain signal input interface luminescent device damage failure when, even if being connect by this The stateful signal of mouth is input to photoisolator, but will cause photoisolator and do not generate output signal, as a result, corresponding institute It states LED light not working, so that LED light can not play the role of instruction.However, by the input circuit of photoisolator After input signal indicator light in parallel, as long as stateful signal is input to photoisolator, the input signal indicator light will be by Be connected it is shinny, and when there is photoisolator luminescent device damage failure when, it is shinny and right such as to there is input signal indicator light The LED light answered does not work, and thus can determine whether out that failure occurs in corresponding photoisolator, user can be reminded to replace in time as a result, Damage the photoisolator of failure.

Preferably, multiple mounting holes 5 are offered on the shell, shell is mounted on switchgear by screw Cabinet body in.

Preferably, the shell uses metal material.Using the shell of metal material, the height in switchgear can avoid Interference of the pressure electromagnetic field to enclosure interior circuit improves the stability of enclosure interior circuit.

In the description of the embodiments of the present invention, it is to be understood that term " on ", "lower", "front", "rear", "left", "right", " hard straight ", "horizontal", "center", "top", "bottom", " top ", " root ", "inner", "outside", " periphery ", " inner The orientation or positional relationship of the instructions such as side ", " inside ", " outside " be based on the orientation or positional relationship shown in the drawings, be only for Make in description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have specifically Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.Wherein, " inboard " refers to Region or space internal or fence up." periphery " refers to the region around certain particular elements or specific region.

In the description of the embodiments of the present invention, term " first ", " second ", " third ", " the 4th " are only used for retouching Purpose is stated, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.By This, define " first ", " second ", " third ", the feature of " the 4th " can explicitly or implicitly include it is one or more A this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.

In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, art Language " installation ", " connected ", " connection ", " assembling " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachable Connection, or be integrally connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The connection in portion.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition Concrete meaning.

In the description of the embodiments of the present invention, particular features, structures, materials, or characteristics can be any one It can be combined in any suitable manner in a or multiple embodiment or examples.

In the description of the embodiments of the present invention, the terms "and/or", a kind of only description affiliated partner Incidence relation, indicate may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and These three situations of B, individualism B.In addition, character "/" herein, typicallys represent the pass that forward-backward correlation object is a kind of "or" System.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (8)

1. a kind of switch cabinet of converting station with output loop protection, including cabinet body is provided with primary equipment and use in cabinet body In the secondary device that the operating condition to primary equipment is measured and monitored, which is characterized in that the primary equipment and secondary Status signal isolating and protecting device is connected between equipment, status signal isolating and protecting device includes shell, is provided in shell Status signal isolation circuit, status signal isolation circuit include photoisolator, and the input terminal connection signal of photoisolator is defeated Incoming interface, the output end of photoisolator are sequentially connected triode signal amplification unit, relay and signal output interface；It is described Signal input interface is used to connect the auxiliary contact of primary equipment by conducting wire, and the signal output interface is used to connect by conducting wire Connect secondary device.

2. the switch cabinet of converting station according to claim 1 with output loop protection, which is characterized in that the relay On be parallel with LED light, the LED light is installed on the shell.

3. the switch cabinet of converting station according to claim 2 with output loop protection, which is characterized in that the LED light On be in series with current-limiting resistance.

4. the switch cabinet of converting station according to claim 1 with output loop protection, which is characterized in that the signal is defeated Incoming interface is multiple, and the side of shell, the signal output interface quantity and signal input interface quantity pair is arranged in arrangement Answer, and arrangement be arranged in the other side of shell, each signal input interface and the corresponding status signal of signal output interface every From circuit.

5. the switch cabinet of converting station according to claim 4 with output loop protection, which is characterized in that described once to set Standby auxiliary contact includes the auxiliary contact of breaker, trolley, earthing and spring energy-storage switch, corresponding, described secondary to set Standby includes being used for circuit-breaker switching on-off state instruction, trolley position instruction, earthing switch state instruction and switch spring energy storage shape The component of state instruction.

6. it is according to claim 1 with output loop protection switch cabinet of converting station, which is characterized in that the photoelectricity every From being parallel with input signal indicator light on the input circuit of device.

7. the switch cabinet of converting station according to claim 1 with output loop protection, which is characterized in that on the shell Multiple mounting holes are offered, shell to be mounted in the cabinet body of switchgear by screw.

8. the switch cabinet of converting station according to claim 1 with output loop protection, which is characterized in that the shell is adopted Use metal material.