CN210325639U - Isolator safety control device and power supply system - Google Patents
Isolator safety control device and power supply system Download PDFInfo
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- CN210325639U CN210325639U CN201921582220.4U CN201921582220U CN210325639U CN 210325639 U CN210325639 U CN 210325639U CN 201921582220 U CN201921582220 U CN 201921582220U CN 210325639 U CN210325639 U CN 210325639U
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Abstract
The utility model is suitable for an isolator safety control technical field, the utility model provides an isolator safety control device and power supply system, isolator safety control device includes switch module and electromagnetic lock, switch module includes load power supply switch and electromagnetic lock power supply switch, load power supply switch and the linkage of electromagnetic lock power supply switch, and load power supply switch and electromagnetic lock power supply switch's on-off state is opposite, the load power supply line is located to the load power supply switch cluster, electromagnetic lock and isolator mechanical interlocking, whether the control coil of electromagnetic lock is got the electricity and is deciding isolator can be operated, the electromagnetic lock power supply line is located to the control coil and the electromagnetic lock power supply switch cluster of electromagnetic lock. The isolating switch can not be operated when the load is put into operation, and the isolating switch can be operated when the load is withdrawn, so that the safety accident caused by the operation of the isolating switch with the load is avoided, the switching sequence of the isolating switch and the load is realized, the misoperation is avoided, and the safety accident is further avoided.
Description
Technical Field
The application belongs to the technical field of isolating switch safety control, and particularly relates to an isolating switch safety control device and a power supply system.
Background
Capacitors in a set of high-capacity high-voltage capacitor cabinet occupy a large space, and one cabinet body is not installed, and needs to be installed in multiple cabinets. However, the incoming line power cabinet adopts a high-voltage isolating switch, and the isolating switch cannot be operated with load (from the action of the isolating switch, the isolating switch is used for disconnecting and closing the circuit, and has an obvious disconnection point when the switch is in a brake-disconnecting state, and an arc extinguishing device is not generally arranged on the isolating switch, so that if the isolating switch is operated in the load-disconnecting state, a larger arc discharge phenomenon is caused due to the slow opening and closing speed of a moving cutter head and a static cutter head, and the contact part of the cutter head is ablated), and therefore, an experienced operator is required to ensure that the isolating switch can be operated after the capacitor cabinet is equally disconnected, namely, when the outgoing line load is not available. At present, the switching sequence of an incoming line isolating switch and an outgoing line load is controlled by depending on the experience of an operator, but misoperation is easily caused by manual operation, namely, the isolating switch is operated with load, and further, safety accidents are caused.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a safety control device for an isolation switch and a power supply system, so as to solve the problem that an operation error is easily caused by manually operating the isolation switch, thereby causing a safety accident.
A first aspect of an embodiment of the present application provides an isolation switch safety control device, including:
a switch module; and
an electromagnetic lock;
the switch module comprises a load power supply switch and an electromagnetic lock power supply switch, the load power supply switch is linked with the electromagnetic lock power supply switch, the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, and the load power supply switch is used for being serially arranged on a load power supply line; the electromagnetic lock is used for being mechanically interlocked with the isolating switch, and a control coil of the electromagnetic lock and the electromagnetic lock power supply switch are serially arranged on a power supply line of the electromagnetic lock.
Optionally, the number of the load power supply switches is at least two, the number of the electromagnetic lock power supply switches is equal to that of the load power supply switches, each load power supply switch corresponds to each electromagnetic lock power supply switch one by one, and each electromagnetic lock power supply switch is serially connected to the electromagnetic lock power supply line.
Optionally, circuit breakers are arranged at two ends of the power supply line of the electromagnetic lock.
A second aspect of an embodiment of the present application provides a power supply system including:
a power supply main line; and
an isolator safety control;
the power supply main line includes:
an isolating switch; and
a load power supply line;
the input end of the isolating switch is connected with an incoming line power supply, the output end of the isolating switch is connected with the input end of the load power supply circuit, and the output end of the load power supply circuit is connected with a load;
the safety control device for the isolating switch comprises:
a switch module; and
an electromagnetic lock;
the switch module comprises a load power supply switch and an electromagnetic lock power supply switch, the load power supply switch is linked with the electromagnetic lock power supply switch, the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, and the load power supply switch is serially arranged on a load power supply line; the electromagnetic lock is mechanically interlocked with the isolating switch, and a control coil of the electromagnetic lock and the electromagnetic lock power supply switch are serially arranged on a power supply line of the electromagnetic lock.
Optionally, the number of the load power supply circuits is at least two, the input end of each load power supply circuit is connected with the output end of the isolating switch, and the output end of each load power supply circuit is used for connecting a corresponding load; the number of the load power supply switches, the number of the load power supply lines and the number of the electromagnetic lock power supply switches are equal, each load power supply switch corresponds to each electromagnetic lock power supply switch one by one, each load power supply switch is arranged in series on the corresponding load power supply line, and each electromagnetic lock power supply switch is arranged in series on the electromagnetic lock power supply lines.
Optionally, circuit breakers are arranged at two ends of the power supply line of the electromagnetic lock.
Optionally, the output end of the isolating switch is connected with a connection point of the input end of the load power supply line, a grounding switch is connected on the grounding line in series, the isolating switch is linked with the grounding switch, and the isolating switch is opposite to the grounding switch in switching state.
Optionally, a fuse is connected in series between the load power supply switch and the output end of the load power supply line.
Optionally, a connection point of the load power supply switch and the output end of the load power supply line is connected with an arrester.
Optionally, a connection point of the load power supply switch and the output end of the load power supply line is connected with an electrical display.
Compared with the prior art, the embodiment of the application has the advantages that: isolator and electromagnetic lock mechanical interlocking, whether the control coil of electromagnetic lock is got to the electricity and is decided isolator can be operated, when load power switch closed, show the load and drop into, because load power switch and electromagnetic lock power switch linkage, and load power switch and electromagnetic lock power switch's on-off state are opposite, so, electromagnetic lock power switch disconnection, the control coil of electromagnetic lock loses the electricity, isolator can not be operated, the mesh that isolator can't be operated when the load drops into has been realized. When the load power supply switch is disconnected, the load exits, the electromagnetic lock power supply switch is closed, the control coil of the electromagnetic lock is electrified, and the isolating switch can be operated, so that the isolating switch can be switched on and off only after the load is cut off. Therefore, the isolating switch cannot be operated when the load is put into the circuit, the isolating switch can be operated only when the load is withdrawn, the isolating switch is prevented from being operated with load to cause safety accidents, the circuit relation is utilized to realize the switching-on and switching-off sequence of the incoming line isolating switch and the outgoing line load, misoperation is avoided, namely, the isolating switch is prevented from being operated with load, and further, safety accidents are prevented from being caused.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a first circuit structure of a safety control device of an isolation switch according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a second circuit structure of the safety control device of the isolation switch according to an embodiment of the present application;
fig. 3 is a schematic diagram of a first circuit structure of a power supply main line of a power supply system according to a second embodiment of the present application;
fig. 4 is a schematic circuit diagram of a second circuit structure of a power supply main line of a power supply system according to a second embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In order to explain the technical means described in the present application, the following description will be given by way of specific embodiments.
Fig. 1 is a schematic diagram of a first circuit structure of a safety control device of an isolation switch according to an embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown.
The safety control device of the isolating switch comprises a switch module and an electromagnetic lock. The switch module comprises a load power supply switch and an electromagnetic lock power supply switch 101. The load power supply switch is used for being arranged in a load power supply line in series, and is not shown in fig. 1. The load power supply switch is linked with the electromagnetic lock power supply switch 101, that is, the load power supply switch and the electromagnetic lock power supply switch 101 are simultaneously operated, when one of the power supply switches is operated, the other power supply switch is operated, and the switch states of the load power supply switch and the electromagnetic lock power supply switch 101 are opposite, that is, the switch states of the load power supply switch and the electromagnetic lock power supply switch 101 are always opposite, such as: when the load power supply switch is closed, the electromagnetic lock power supply switch 101 is switched off; when the load supply switch is open, the electromagnetic lock supply switch 101 is closed. Thus, the load power switch and the electromagnetic lock power switch 101 may be a pair of contact switches, such as: the load power supply switch is a main contact switch, and the electromagnetic lock power supply switch 101 is an auxiliary contact switch corresponding to the main contact switch.
The electromagnetic lock is used for interlocking with isolator machinery, and under general condition, electromagnetic lock and isolator's operating handle machinery interlock, because electromagnetic lock and isolator machinery interlock belong to conventional technological means, no longer give unnecessary details. Therefore, the state of the electromagnetic lock, that is, whether the control coil 102 of the electromagnetic lock is powered determines whether the disconnector can be operated, in this embodiment, the control coil 102 of the electromagnetic lock is powered, and the disconnector can be operated; the control coil 102 of the electromagnetic lock is de-energized and the disconnector cannot be operated.
The control coil 102 and the power supply switch 101 of the electromagnetic lock are serially arranged on the power supply line of the electromagnetic lock, the two ends of the power supply line of the electromagnetic lock are connected with the power supply, and then the on-off state of the power supply switch 101 of the electromagnetic lock determines whether the control coil 102 of the electromagnetic lock is electrified or not.
When the load power supply switch is turned off, the load is turned on, because the load power supply switch is linked with the electromagnetic lock power supply switch 101 and the on-off states of the load power supply switch and the electromagnetic lock power supply switch 101 are opposite, the electromagnetic lock power supply switch 101 is turned off, the control coil 102 of the electromagnetic lock is powered off, the isolating switch cannot be operated, and the purpose that the isolating switch cannot be operated when the load is turned on is achieved. When the load power supply switch is switched off, the load is indicated to exit (namely, cut off), the electromagnetic lock power supply switch 101 is switched on, the control coil 102 of the electromagnetic lock is electrified, and the isolating switch can be operated, so that the isolating switch can be switched on and off only after the load is cut off. Therefore, the isolating switch cannot be operated when the load is put into the circuit, the isolating switch can be operated only when the load is withdrawn, the isolating switch is prevented from being operated with the load, so that safety accidents are avoided, the switching-on and switching-off sequence of the isolating switch and the load is realized through the circuit relation, misoperation is avoided, and further safety accidents are avoided.
Fig. 2 is a schematic diagram of a second circuit structure of the safety control device for the disconnecting switch according to an embodiment of the present application. For convenience of explanation, only portions related to the embodiments of the present application are shown.
The safety control device of the isolating switch comprises a switch module and an electromagnetic lock. The switch module comprises a load power supply switch and an electromagnetic lock power supply switch.
The load corresponding to the safety control device of the isolating switch is specifically a capacitor cabinet (namely, the load is a capacitor), and in order to meet the requirement, the number of the capacitor cabinets is three. Then, three load power supply lines are needed, each connected to a corresponding capacitor box. Correspondingly, the number of the load power supply switches is three, the three load power supply switches are respectively arranged on the corresponding load power supply circuits in series, fig. 2 is not shown, and functionally, the load power supply switches are capacitor cabinet switching switches; the number of the electromagnetic lock power supply switches is three, corresponding to the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 in fig. 2, and each load power supply switch corresponds to each electromagnetic lock power supply switch one by one. Taking the electromagnetic lock power supply switch 201 as an example, the electromagnetic lock power supply switch 201 is linked with the corresponding load power supply switch, that is, the load power supply switch and the electromagnetic lock power supply switch 201 operate simultaneously, when one of the power supply switches operates, the other power supply switch operates, and the switch states of the load power supply switch and the electromagnetic lock power supply switch 201 are opposite, that is, the switch states of the load power supply switch and the electromagnetic lock power supply switch 201 are always opposite, for example: when the load power supply switch is closed, the electromagnetic lock power supply switch 201 is switched off; when the load supply switch is open, the electromagnetic lock supply switch 201 is closed. Thus, the load power switch and the electromagnetic lock power switch 201 may be a pair of contact switches, such as: the load power supply switch is a main contact switch, and the electromagnetic lock power supply switch 201 is an auxiliary contact switch corresponding to the main contact switch. The relationship between the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 and the corresponding load power supply switches is the same as the above.
As shown in fig. 2, an electromagnetic lock power supply switch 201, an electromagnetic lock power supply switch 202 and an electromagnetic lock power supply switch 203 are serially arranged on an electromagnetic lock power supply line.
The electromagnetic lock is used for interlocking with isolator machinery, and under general condition, electromagnetic lock and isolator's operating handle machinery interlock, because electromagnetic lock and isolator machinery interlock belong to conventional technological means, no longer give unnecessary details. Therefore, the state of the electromagnetic lock, that is, whether the control coil 204 of the electromagnetic lock is powered determines whether the disconnector can be operated, in this embodiment, the control coil 204 of the electromagnetic lock is powered, and the disconnector can be operated; the control coil 204 of the electromagnetic lock is de-energized and the disconnector cannot be operated. The control coil 204 of the electromagnetic lock is arranged in series on the power supply line of the electromagnetic lock.
As shown in fig. 2, the two ends of the power supply line of the electromagnetic lock are connected with the power supply source, and then the switching states of the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 determine whether the control coil 204 of the electromagnetic lock is powered.
In addition, the two ends of the electromagnetic lock power supply line are provided with a circuit breaker 205 and a circuit breaker 206 for ensuring the safety of the electromagnetic lock power supply line.
When a certain load power supply switch is closed, the corresponding capacitor cabinet is switched on, and because the load power supply switch is linked with the electromagnetic lock power supply switch and the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, the electromagnetic lock power supply switch corresponding to the load trigger switch is switched off. Because the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 are arranged in series, if only one capacitor cabinet is put into, the corresponding electromagnetic lock power supply switch is disconnected, the control coil 204 of the electromagnetic lock is powered off, and the isolating switch cannot be operated.
Only when these three load power supply switches all break off, it all withdraws from (promptly to excise) to show that three electric capacity cabinet, and electromagnetic lock power supply switch 201, electromagnetic lock power supply switch 202 and electromagnetic lock power supply switch 203 are all closed, and electromagnetic lock's control coil 204 can be electrified, and isolator can be operated. Therefore, the switch can be switched on and off only after all the loads are cut off and the switch is separated.
Therefore, as long as one capacitor cabinet is put into use, the power supply line of the electromagnetic lock is disconnected, and the isolating switch cannot be operated. Only all the capacitor cabinets are cut off, the isolating switch can be operated, the isolating switch is prevented from being operated with load, safety accidents are avoided, the circuit relation is used for realizing the switching sequence of the isolating switch and the load, misoperation is avoided, and further the safety accidents are avoided.
In the foregoing, because the number of electric capacity cabinet is three, consequently, the number of load power supply line, load power supply switch and electromagnetic lock power supply switch is three, and this is a concrete implementation mode, and more generally, the number of load power supply switch is at least two, and the number of load power supply line, electromagnetic lock power supply switch equals with the number of load power supply switch, and each load power supply switch and each electromagnetic lock power supply switch one-to-one, each electromagnetic lock power supply switch locates the electromagnetic lock power supply line in cluster.
The second embodiment of the application provides a power supply system, which comprises two parts, namely a power supply main line and an isolating switch safety control device.
As shown in fig. 3, the main power supply line includes an isolating switch 301 and a load power supply line 302, an input end of the isolating switch 301 is used for connecting to an incoming power supply, an output end of the isolating switch 301 is connected to an input end of the load power supply line 302, and an output end of the load power supply line 302 is used for connecting to a load 304. In addition, the number of the load power supply lines 302 is not unique, and may be set according to actual needs, when at least two load power supply lines 302 are set, the input ends of all the load power supply lines 302 are connected to the output ends of the isolating switches 301, and the output ends of each load power supply line 302 are connected to the corresponding load 304.
The structure of the safety control device of the isolating switch is shown in figure 1 and comprises a switch module and an electromagnetic lock. The switch module comprises a load power supply switch 303 and an electromagnetic lock power supply switch 101. The load power supply switch 303 is connected in series to the load power supply line 302. The load power supply switch 303 and the electromagnetic lock power supply switch 101 are linked, that is, the load power supply switch 303 and the electromagnetic lock power supply switch 101 are simultaneously operated, when one of the two power supply switches is operated, the other power supply switch is operated, and the switch states of the load power supply switch 303 and the electromagnetic lock power supply switch 101 are opposite, that is, the switch states of the load power supply switch 303 and the electromagnetic lock power supply switch 101 are always opposite, for example: when the load power supply switch 303 is closed, the electromagnetic lock power supply switch 101 is switched off; when the load power supply switch 303 is open, the electromagnetic lock power supply switch 101 is closed. Thus, the load power switch 303 and the electromagnetic lock power switch 101 may be a pair of contact switches, such as: the load power supply switch 303 is a main contact switch, and the electromagnetic lock power supply switch 101 is an auxiliary contact switch corresponding to the main contact switch.
The electromagnetic lock is mechanically interlocked with the isolating switch 301, generally, the electromagnetic lock is mechanically interlocked with the operating handle of the isolating switch 301, and the electromagnetic lock and the isolating switch 301 are mechanically interlocked by conventional technical means, so that the details are not repeated. Therefore, the state of the electromagnetic lock, that is, whether the control coil 102 of the electromagnetic lock is powered determines whether the disconnector 301 can be operated, in this embodiment, the control coil 102 of the electromagnetic lock is powered, and the disconnector 301 can be operated; the control coil 102 of the electromagnetic lock is de-energized and the disconnector 301 cannot be operated.
The control coil 102 and the power supply switch 101 of the electromagnetic lock are serially arranged on the power supply line of the electromagnetic lock, the two ends of the power supply line of the electromagnetic lock are connected with the power supply, and then the on-off state of the power supply switch 101 of the electromagnetic lock determines whether the control coil 102 of the electromagnetic lock is electrified or not.
When the load power supply switch 303 is closed, the load 304 is turned on, because the load power supply switch 303 is linked with the electromagnetic lock power supply switch 101, and the switch states of the load power supply switch 303 and the electromagnetic lock power supply switch 101 are opposite, then the electromagnetic lock power supply switch 101 is turned off, the control coil 102 of the electromagnetic lock is de-energized, and the isolating switch 301 cannot be operated, so that the purpose that the isolating switch 301 cannot be operated when the load 304 is turned on is achieved. When the load power supply switch 303 is turned off, which indicates that the load 304 exits (i.e., is cut off), the electromagnetic lock power supply switch 101 is closed, the control coil 102 of the electromagnetic lock is energized, and the disconnecting switch 301 can be operated, so that the disconnecting switch 301 can be switched on and off only after the load 304 is cut off.
Therefore, when the load 304 is put into operation, the isolating switch 301 cannot be operated, and only when the load 304 is put out, the isolating switch 301 can be operated, so that the safety accident caused by the load operation of the isolating switch 301 is avoided, the switching sequence of the isolating switch 301 and the load 304 is realized through the circuit relationship, the misoperation is avoided, and the safety accident is further avoided.
The second embodiment of the present application provides another power supply system, which includes two major parts, namely, a power supply main line and an isolation switch safety control device. In this embodiment, the load of the power supply system is three capacitor cabinets, and each capacitor cabinet is represented by a corresponding capacitor, which is a capacitor 409, a capacitor 410, and a capacitor 411.
As shown in fig. 4, the main power supply line includes a disconnecting switch 401, an input terminal of the disconnecting switch 401 is used for connecting the incoming power supply, and an arrow at the input terminal of the disconnecting switch 401 indicates the direction of the incoming power supply. The output end of the disconnector 401 is connected to a bus 402 (bus 402 is specifically a 10kV bus). The power supply main line includes three load power supply lines, which are a load power supply line 403, a load power supply line 404, and a load power supply line 405. The input ends of a load power supply line 403, a load power supply line 404 and a load power supply line 405 are connected with a bus 402, a load power supply switch 406 is arranged in series on the load power supply line 403, a load power supply switch 407 is arranged in series on the load power supply line 404, a load power supply switch 408 is arranged in series on the load power supply line 405, the output end of the load power supply line 403 is connected with a capacitor 409, the output end of the load power supply line 404 is connected with a capacitor 410, and the output end of the. Functionally, the three load supply switches are corresponding capacitor cabinet switching switches.
The structure of the safety control device of the isolating switch is shown in fig. 2 and comprises a switch module and an electromagnetic lock. The switch module comprises a load power supply switch and an electromagnetic lock power supply switch.
Because the load is three electric capacity, so, the number of electromagnetic lock power supply switch is three, corresponds electromagnetic lock power supply switch 201, electromagnetic lock power supply switch 202 and electromagnetic lock power supply switch 203 in fig. 2, and each load power supply switch corresponds one-to-one with each electromagnetic lock power supply switch, promptly: the load power supply switch 406 corresponds to the electromagnetic lock power supply switch 201, the load power supply switch 407 corresponds to the electromagnetic lock power supply switch 202, and the load power supply switch 408 corresponds to the electromagnetic lock power supply switch 203. Taking the electromagnetic lock power supply switch 201 as an example, the electromagnetic lock power supply switch 201 is linked with the load power supply switch 406, that is, the load power supply switch 406 and the electromagnetic lock power supply switch 201 operate simultaneously, when one of the power supply switches operates, the other power supply switch operates, and the switch states of the load power supply switch 406 and the electromagnetic lock power supply switch 201 are opposite, that is, the switch states of the load power supply switch 406 and the electromagnetic lock power supply switch 201 are always opposite, for example: when the load power supply switch 406 is closed, the electromagnetic lock power supply switch 201 is switched off; when the load power switch 406 is open, the electromagnetic lock power switch 201 is closed. Thus, the load power switch 406 and the electromagnetic lock power switch 201 may be a pair of contact switches, such as: the load power supply switch 406 is a main contact switch, and the electromagnetic lock power supply switch 201 is an auxiliary contact switch corresponding to the main contact switch. The relationship between the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 and the corresponding load power supply switches is the same as the above.
As shown in fig. 2, an electromagnetic lock power supply switch 201, an electromagnetic lock power supply switch 202 and an electromagnetic lock power supply switch 203 are serially arranged on an electromagnetic lock power supply line.
The electromagnetic lock and the isolating switch 401 are mechanically interlocked, generally, the electromagnetic lock and the operating handle of the isolating switch 401 are mechanically interlocked, and the electromagnetic lock and the isolating switch 401 are mechanically interlocked by conventional technical means, so that the details are not repeated. Therefore, the state of the electromagnetic lock, that is, whether the control coil 204 of the electromagnetic lock is powered determines whether the disconnector 401 can be operated, in this embodiment, the control coil 204 of the electromagnetic lock is powered, and the disconnector 401 can be operated; the control coil 204 of the electromagnetic lock is de-energized and the disconnector 401 cannot be operated. The control coil 204 of the electromagnetic lock is arranged in series on the power supply line of the electromagnetic lock.
As shown in fig. 2, the two ends of the power supply line of the electromagnetic lock are connected with the power supply source, and then the switching states of the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 determine whether the control coil 204 of the electromagnetic lock is powered.
In addition, the two ends of the electromagnetic lock power supply line are provided with a circuit breaker 205 and a circuit breaker 206 for ensuring the safety of the electromagnetic lock power supply line.
As shown in fig. 4, in this embodiment, a connection point between the output end of the isolating switch 401 and the bus 402 is connected to a ground line, a ground switch 412 is serially connected to the ground line, the isolating switch 401 and the ground switch 412 are linked, and the isolating switch 401 and the ground switch 412 are in opposite switch states. Then, when the disconnecting switch 401 is closed, the power supply system operates normally, and the grounding switch 412 is turned off; when the isolating switch 401 is disconnected, the power supply system does not operate, the grounding switch 412 is connected, the bus 402 is grounded, no voltage is available on the bus 402, the safety protection effect on the line is achieved, and people are prevented from getting an electric shock. In addition, a live display 422 is connected to the input of the isolation switch 401, and is capable of detecting the operating state of the input of the isolation switch 401.
In this embodiment, a fuse 413 is connected in series between the load power supply switch 406 and the capacitor 409 on the load power supply line 403; a fuse 414 is arranged on the load power supply line 404 and between the load power supply switch 407 and the capacitor 410 in series; a fuse 415 is connected in series between the load power supply switch 408 and the capacitor 411 on the load power supply line 405. The fuse can carry out safety protection to the load power supply line.
In this embodiment, a connection point of the load power supply switch 406 and the output end of the load power supply line 403, specifically, a connection point of the load power supply switch 406 and the fuse 413 is connected with the lightning arrester 416; the connection point of the load power supply switch 407 and the output end of the load power supply line 404, specifically, the connection point of the load power supply switch 407 and the fuse 414 is connected with a lightning arrester 417; the connection point of the load power supply switch 408 and the output end of the load power supply line 405, specifically, the connection point of the load power supply switch 408 and the fuse 415, is connected with an arrester 418. The lightning arrester can carry out safety protection to the load power supply circuit.
In this embodiment, a connection point of the load power supply switch 406 and the output end of the load power supply line 403, specifically, a connection point of the load power supply switch 406 and the fuse 413 is connected with a live display 419; a connection point of the load power supply switch 407 and the output end of the load power supply line 404, specifically, a connection point of the load power supply switch 407 and the fuse 414 is connected with a live display 420; the connection point of the load power supply switch 408 and the output end of the load power supply line 405, specifically, the connection point of the load power supply switch 408 and the fuse 415 is connected with a live display 421. The charged display can detect the running state of the corresponding load power supply line.
In this embodiment, the capacitor 409 may also be connected to the reactor 423 and grounded; the capacitor 410 can also be connected with the reactor 424 and grounded; the capacitor 411 may also be connected to the reactor 425 and to ground. The reactor mainly has two functions: 1) limiting the switching-on surge current; 2) and the higher harmonics of the power supply system are suppressed to protect the capacitor.
In this embodiment, a voltage transformer 426 for detecting the voltage of the capacitor 409 is disposed at two ends of the capacitor 409, a voltage transformer 427 for detecting the voltage of the capacitor 410 is disposed at two ends of the capacitor 410, and a voltage transformer 428 for detecting the voltage of the capacitor 411 is disposed at two ends of the capacitor 411. The voltage transformer outputs the detected voltage information to related monitoring equipment for monitoring the voltage state of the capacitor in real time.
When a certain load power supply switch is closed, the corresponding capacitor cabinet is switched on, namely the corresponding capacitor is switched on, and because the load power supply switch is linked with the electromagnetic lock power supply switch and the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, the electromagnetic lock power supply switch corresponding to the load trigger switch is switched off. Because the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 are arranged in series, if only one capacitor cabinet is put into, the corresponding electromagnetic lock power supply switch is disconnected, the control coil 204 of the electromagnetic lock is powered off, and the isolating switch 401 cannot be operated.
Only when the load power supply switch 406, the load power supply switch 407 and the load power supply switch 408 are all disconnected, it indicates that the three capacitor cabinets all exit (i.e., are cut), that is, the capacitor 409, the capacitor 410 and the capacitor 411 are all cut, the electromagnetic lock power supply switch 201, the electromagnetic lock power supply switch 202 and the electromagnetic lock power supply switch 203 are all closed, the control coil 204 of the electromagnetic lock can be powered, and the isolating switch 401 can be operated. Therefore, the disconnecting switch 401 can be switched on and off only after all the capacitors are cut off.
Therefore, as long as one capacitor cabinet is put into use, the power supply line of the electromagnetic lock is disconnected, and the isolating switch 401 cannot be operated. Only all the capacitor cabinets are cut off, the isolating switch 401 can be operated, the isolating switch 401 is prevented from being operated with load, safety accidents are avoided, the circuit relation is used for realizing the switching-on and switching-off sequence of the isolating switch 401 and the load, misoperation is avoided, and further safety accidents are avoided.
In the foregoing, because the number of electric capacity cabinet is three, consequently, the number of load power supply line, load power supply switch and electromagnetic lock power supply switch is three, this is a specific implementation mode, more generally, the number of load power supply line is at least two, isolator 401's output is connected to the input of each load power supply line, the output of each load power supply line is used for connecting the load that corresponds, the number of load power supply switch, the number of load power supply line and electromagnetic lock power supply switch equals, each load power supply switch corresponds with each electromagnetic lock power supply switch one-to-one, each load power supply switch cluster is located corresponding load power supply line, each electromagnetic lock power supply switch cluster is located the electromagnetic lock power supply line.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An isolator safety control apparatus, comprising:
a switch module; and
an electromagnetic lock;
the switch module comprises a load power supply switch and an electromagnetic lock power supply switch, the load power supply switch is linked with the electromagnetic lock power supply switch, the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, and the load power supply switch is used for being serially arranged on a load power supply line; the electromagnetic lock is used for being mechanically interlocked with the isolating switch, and a control coil of the electromagnetic lock and the electromagnetic lock power supply switch are serially arranged on a power supply line of the electromagnetic lock.
2. The safety control device of the isolating switch according to claim 1, wherein the number of the load power supply switches is at least two, the number of the electromagnetic lock power supply switches is equal to the number of the load power supply switches, each load power supply switch corresponds to each electromagnetic lock power supply switch in a one-to-one manner, and each electromagnetic lock power supply switch is serially arranged on a power supply line of the electromagnetic lock.
3. A safety control device for a disconnecting switch according to claim 1, characterized in that circuit breakers are arranged at two ends of a power supply line of the electromagnetic lock.
4. A power supply system, comprising:
a power supply main line; and
an isolator safety control;
the power supply main line includes:
an isolating switch; and
a load power supply line;
the input end of the isolating switch is connected with an incoming line power supply, the output end of the isolating switch is connected with the input end of the load power supply circuit, and the output end of the load power supply circuit is connected with a load;
the safety control device for the isolating switch comprises:
a switch module; and
an electromagnetic lock;
the switch module comprises a load power supply switch and an electromagnetic lock power supply switch, the load power supply switch is linked with the electromagnetic lock power supply switch, the switch states of the load power supply switch and the electromagnetic lock power supply switch are opposite, and the load power supply switch is serially arranged on a load power supply line; the electromagnetic lock is mechanically interlocked with the isolating switch, and a control coil of the electromagnetic lock and the electromagnetic lock power supply switch are serially arranged on a power supply line of the electromagnetic lock.
5. The power supply system according to claim 4, wherein the number of the load power supply lines is at least two, the input end of each load power supply line is connected with the output end of the isolating switch, and the output end of each load power supply line is used for connecting a corresponding load; the number of the load power supply switches, the number of the load power supply lines and the number of the electromagnetic lock power supply switches are equal, each load power supply switch corresponds to each electromagnetic lock power supply switch one by one, each load power supply switch is arranged in series on the corresponding load power supply line, and each electromagnetic lock power supply switch is arranged in series on the electromagnetic lock power supply lines.
6. The power supply system of claim 4, wherein circuit breakers are arranged at two ends of the power supply line of the electromagnetic lock.
7. The power supply system according to any one of claims 4 to 6, wherein a connection point between the output end of the isolating switch and the input end of the load power supply line is connected with a grounding line, a grounding switch is connected in series on the grounding line, the isolating switch is linked with the grounding switch, and the isolating switch and the grounding switch are in opposite switch states.
8. The power supply system according to any one of claims 4 to 6, wherein a fuse is connected in series between the load power supply switch and the output end of the load power supply line.
9. The power supply system according to any one of claims 4 to 6, wherein a connection point of the load power supply switch to the output terminal of the load power supply line is connected to a lightning arrester.
10. A power supply system according to any one of claims 4 to 6, characterised in that the connection point of the load supply switch to the output of the load supply line is connected to an electrical display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921582220.4U CN210325639U (en) | 2019-09-23 | 2019-09-23 | Isolator safety control device and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921582220.4U CN210325639U (en) | 2019-09-23 | 2019-09-23 | Isolator safety control device and power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210325639U true CN210325639U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921582220.4U Active CN210325639U (en) | 2019-09-23 | 2019-09-23 | Isolator safety control device and power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210325639U (en) |
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2019
- 2019-09-23 CN CN201921582220.4U patent/CN210325639U/en active Active
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