CN210722065U - Fault simulation display device - Google Patents
Fault simulation display device Download PDFInfo
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- CN210722065U CN210722065U CN201921251987.9U CN201921251987U CN210722065U CN 210722065 U CN210722065 U CN 210722065U CN 201921251987 U CN201921251987 U CN 201921251987U CN 210722065 U CN210722065 U CN 210722065U
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Abstract
The utility model discloses a fault simulation display device, including analog display module, simulation circuit breaker module, fault current generation module and time-voltage type protection device, the utility model discloses a fault current generation module produces fault current and gives time-voltage type protection device, and time-voltage type protection device controls the action of simulation circuit breaker module after detecting fault current to show the action of simulation circuit breaker module through analog display module, thereby directly perceived display time-voltage type protection device's logic.
Description
Technical Field
The utility model relates to an electric power system fault simulation device field, in particular to fault simulation display device.
Background
The time-voltage type protection device is a distribution network automatic control terminal with protection function and time-voltage type logic, and uses voltage and time as criteria, when there is fault, the transformer substation time-voltage type protection device detects that the fault current firstly trips, the time-voltage type protection device on the section switch corresponding to the circuit no-electricity detects that the voltage-losing trip trips, when the reclosing time is reached, the transformer substation time-voltage type protection device is coincided, the circuit is electrified, the time-voltage type protection device on the section switch detects the voltage, the time is delayed to be closed, the time is calculated, if a certain switch is closed and the fault trip is reached, the transformer substation immediately trips, the device judges whether the fault point is in front according to the time criteria, if the front is provided with a closing locking mark, the next time of the transformer substation switch is coincided, when the section switch is reached, the time-voltage type protection device is closed by locking, isolating the fault point. Due to the complexity of a power system, the distribution network time-voltage type protection device is often too complex in logic during production test and display, can not be clearly expressed by the three languages, and a device capable of visually testing the logic of the distribution network time-voltage type protection device is lacked. In the process of development and production, a plurality of problems caused by incorrect logic operation are encountered, so that the development efficiency and the test efficiency are seriously low. Further, the time-voltage type protection device cannot be visually and clearly displayed to a customer when displayed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a fault simulation display device, can show time-voltage type protection device's logic directly perceived.
According to the utility model discloses an aspect provides a fault simulation display device, include: the time-voltage type protection device is respectively connected with the analog circuit breaker module and the fault current generation module;
the fault current generation module is used for generating fault current;
the simulation circuit breaker module is used for simulating the action of the high-voltage circuit breaker;
and the analog display module is used for displaying the state of the analog circuit breaker module.
Has the advantages that: the utility model discloses a fault current takes place the module and produces fault current for time-voltage type protection device, time-voltage type protection device controls the action of simulation circuit breaker module after detecting fault current to show the action of simulation circuit breaker module through the analog display module, thereby the logic of visual display time-voltage type protection device.
As a further improvement of the scheme, a state indicator lamp is arranged on the analog display module and connected with the analog circuit breaker module, and the analog circuit breaker module controls the on-off of the state indicator lamp. The circuit breaker module action is simulated through the opening and closing visual display of the state indicating lamp.
As a further improvement of the above-mentioned scheme, the fault current generation module includes an alternating current contact voltage regulator and a switch control circuit, the alternating current contact voltage regulator is used for generating current and voltage analog quantity, the switch control circuit includes a simulation fault button, one end of the simulation fault button with the alternating current contact voltage regulator is connected, the other end of the simulation fault button with time-voltage type protection device is connected. The switch control circuit controls the on-off of a circuit between the alternating current contact voltage regulator and the time-voltage type protection device, and fault current is transmitted to the time-voltage type protection device when the switch circuit is switched on.
As a further improvement of the above scheme, the analog circuit breaker module includes a closing button, an opening button, a circuit breaker and a relay, two ends of the closing button are respectively connected to the power supply and a closing release HQ of the circuit breaker, two ends of the opening button are respectively connected to the power supply and an opening release TQ of the circuit breaker, an opening outlet of the time-voltage type protection device is connected to the opening release TQ of the circuit breaker, a closing outlet of the time-voltage type protection device is connected to the closing release HQ of the circuit breaker, and a switch button of the circuit breaker is connected to the relay.
As a further improvement of the above scheme, the status indicator lamp includes an opening indicator lamp L1, a closing indicator lamp L2 and an energy storage indicator lamp L3, and the opening indicator lamp L1, the closing indicator lamp L2 and the energy storage indicator lamp L3 are respectively connected to the relay.
As a further improvement of the above scheme, the utility model discloses still include first current limiting resistor R1, second current limiting resistor R2 and third current limiting resistor R3, first current limiting resistor R1 and separating brake pilot lamp L1 are in series and connect on the power supply circuit through the normally closed contact of relay in proper order; the second current limiting resistor R2 and the closing indicator lamp L2 are sequentially connected in series and connected to a power circuit through a normally open contact of the relay; and the third current limiting resistor R3 and the switching-off indicator lamp L1 are sequentially connected in series and are connected to a power circuit through a normally open contact of the relay.
As a further improvement of the above scheme, the system further comprises a communication management unit, a monitoring computer and a display, wherein the communication management unit is used for connecting the monitoring computer and the time-voltage type protection device, and the display is connected with the monitoring computer. The monitoring computer records each state and fault information of the automatic isolation fault of the time-voltage type protection device, and is convenient to check and analyze historical records.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic block diagram of a fault simulation display device according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an analog display module according to a preferred embodiment of the present invention;
FIG. 3 is a schematic block diagram of a time-voltage type protection device according to a preferred embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a fault simulation display device according to a preferred embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Referring to fig. 1 and 2, a fault simulation display device includes a simulation display module 100, a simulation breaker module 300, a fault current generation module 200, and a time-voltage type protection device 400, where the time-voltage type protection device 400 is connected to the simulation breaker module 300 and the fault current generation module 200, respectively, a status indicator light 101 is disposed on the simulation display module 100, and the status indicator light 101 is connected to the simulation breaker module 300. The fault current generation module 200 is configured to simulate generation of a fault current and transmit the fault current to the time-voltage type protection device 400, and the time-voltage type protection device 400 controls a state of the status indicator light 101 through the simulated circuit breaker module 300 after detecting the fault current, so as to visually display the fault current on the simulated display module 100. Specifically, the status indicator lamp 101 includes an opening indicator lamp L1, a closing indicator lamp L2, and an energy storage indicator lamp L3.
The utility model discloses a fault current generation module 200 produces fault current for time-voltage type protection device 400, and time-voltage type protection device 400 detects behind the fault current through the on-off change of simulation circuit breaker module 300 control status indicator 101 on the simulation display module 100 to visual display time-voltage type protection device 400's logic.
Referring to fig. 2, the present embodiment simulates logic changes of time-voltage type protection devices 400 respectively installed on switches FB1, S1, S2, L, S3, S4 and FB2, identifiers of switches FB1, S1, S2, L, S3, S4 and FB2 are arranged on the analog display module 100, and a brake-off indicator lamp L1, a brake-on indicator lamp L2, an energy storage indicator lamp L3, a brake-off button 302 and a brake-on button 301 are arranged below the identifiers, each switch simulates and installs a corresponding time-voltage type protection device 400, so that there are six time-voltage type protection devices 400 and operating circuits thereof, and in other embodiments, the number of switches may be an integer greater than 0, such as 1, 2 or 3.
Referring to fig. 3, the time-voltage type protection device 400 of the present invention is composed of an analog bus side voltage input 401, an analog cable side voltage input 402, an analog current input 403, an input 404, an LCD liquid crystal interface 405, a switch-on outlet 406, a switch-off outlet 407, an alarm signal outlet 408, a communication circuit 409, and a central processing unit 410. The analog bus side voltage is input 401, a voltage transformer induces the bus side voltage by using the electromagnetic induction principle to generate an analog signal, and then the analog signal is converted into a digital signal by a circuit and transmitted to the central processing unit 410. The analog voltage is input, the voltage transformer induces the cable voltage by using the electromagnetic induction principle to generate an analog signal, and the analog signal is converted into a digital signal by a circuit and transmitted to the central processing unit 410. The analog current is input 403, the current transformer induces the current on the bus side and the cable side by using the electromagnetic induction principle to generate an analog signal, and then the analog signal is converted into a digital signal by a circuit and transmitted to the central processing unit 410. The input 404 transmits an external signal to the cpu 410 in an optical coupling isolation photoelectric isolation manner. The LCD liquid crystal operation interface 405 displays and controls states of current, voltage, constant value, electrical quantity, etc. under the control of the central processing unit 410. The switching-on outlet 406 is controlled by the central processing unit 410, is composed of an IGBT, an energy storage capacitor, and the like, and can drive a switching-on coil outwards. The opening outlet 407 is controlled by the central processing unit 410, and is composed of an IGBT, an energy storage capacitor, and the like, and can drive an opening coil outwards. The alarm signal outlet 408 is controlled by the central processing unit 410, is composed of a relay, a triode and the like, and can provide a dry contact signal to the outside. The communication circuit 409 is composed of an ethernet circuit, an RS485 circuit and an RS232 circuit, and can exchange data with an upper computer and a background under the control of the central processing unit 410, further display current, voltage, state, electric quantity and the like, and further set a constant value, check the constant value, set parameters, remotely control opening and closing, test an outlet and a series of operations on a time-voltage type device through the upper computer and the background.
Referring to fig. 4, the fault current generation module 200 includes an ac contact voltage regulator 202 and a switch control circuit 201, the ac contact voltage regulator 202 is configured to generate current and voltage analog quantities, the switch control circuit 201 includes 4 analog fault buttons 2011, i.e., Kn _ Ia, Kn _ Ib, Kn _ Ic, and Kn _ I0 in the drawing, which respectively control the three-phase terminals of the three-phase current and the ground switches, one end of the analog fault button 2011 is connected to the ac contact voltage regulator 202, and the other end of the analog fault button 2011 is respectively connected to terminals Ia, Ib, Ic, and I0 of the time-voltage type protection device 400. An analog fault button 2011 is provided on the analog display module 100, and when the analog fault button 2011 is pressed, the time-voltage type protection device 400 receives a fault current.
Further, the analog circuit breaker module 300 includes a closing button 301, an opening button 302, a circuit breaker 303 and a relay 304, two ends of the closing button 301 are respectively connected with a closing release HQ of the power supply and the circuit breaker 303, two ends of the opening button 302 are respectively connected with an opening release TQ of the power supply and the circuit breaker 303, the opening button 302 and the closing button 301 are arranged on the analog display module 100, and the opening button 302 and the closing button 301 are manually opened and closed by pressing. The opening outlet 407 of the time-voltage type protection device 400 is connected with the opening release TQ of the circuit breaker 303, the closing outlet 406 of the time-voltage type protection device 400 is connected with the closing release HQ of the circuit breaker 303, and the switch button of the circuit breaker 303 is connected with the relay 304. Namely, the switches of the relay 304J1-J16 are controlled by a closing release HQ and an opening release TQ. Referring to fig. 3 and 4, relays 304J1-J16 control the operating state of switch control circuit 201 and the on and off of the indicator lights. The first current limiting resistor R1R1 and the opening indicating lamp L1 are connected in series in sequence and are connected to a power circuit through a normally closed contact of the relay 304J 15; the second current limiting resistor R2R2 and the closing indicator lamp L2 are connected in series in sequence and are connected to a power supply circuit through a normally open contact of the relay 304J 15; the third current limiting resistor R3R3 and the switching-off indicator lamp L1 are connected in series in sequence and are connected to the power circuit through the normally open contact of the relay 304J 15.
Further, the system comprises a communication management unit 500, a monitoring computer 600 and a display 700, wherein the communication management unit 500 is used for connecting the monitoring computer 600 and the time-voltage type protection device 400, and the display 700 is connected with the monitoring computer 600. The monitoring computer 600 records each state of the automatic isolation fault and fault information of the time-voltage type protection device 400, facilitating the review of history and analysis.
The working process of the fault simulation display device of the embodiment is as follows:
1. normal operation of line
Referring to fig. 2 and fig. 3, when the line is normally running, the switches FB1, S1, S2, S3, S4 and FB2 are in a closing state, and a closing indicator lamp L2 corresponding to the electric primary wiring analog display screen is turned on; the L1 is in the open state, and the open indicator light L1 corresponding to the electric primary wiring simulation display screen is lighted.
2. When the simulated fault button 2011K2_ Ia is pressed, the action process of the fault simulation display device is as follows
1 switch FB1 opening
The time-voltage type protection device 400 installed on the switch FB1 detects that the fault current is tripped immediately, and the closing indicator lamp L2 corresponding to the switch FB1 displayed on the electric primary wiring analog display screen is turned off, and the opening indicator lamp L1 is turned on at the same time.
2 the switch S1 and the switch S2 are switched off under the condition of no voltage
Because the left line is in a power-off state, the time-voltage type protection device 400 installed on the switch S1 detects no voltage, the control switch S1 trips, the closing indicator lamp L2 corresponding to the switch S1 displayed by the electric primary wiring analog display screen is turned off, and the opening indicator lamp L1 is turned on at the same time. When the time-voltage type protection device 400 installed on the switch S2 to trip in a voltage loss manner detects no voltage, the control switch S2 trips, the closing indicator light L2 corresponding to the switch S2 displayed on the electric primary wiring simulation display screen goes out, and the opening indicator light L1 is turned on at the same time
3) Reclosing timing, switch FB1 reclosing
After the time-voltage type protection device 400 provided with the switch FB1 trips in a fault, reclosing timing is started, when the reclosing time is up, the FB1 switch is reclosed, an opening indicator lamp L1 corresponding to the switch FB1 displayed on the electric primary wiring analog display screen is turned off, and meanwhile, the closing indicator lamp L2 is turned on.
4) The switch S1 has reclosing pressure but has fault, and after S1 reclosing, the switch FB1 vertical horse trips again
The switch FB1 is re-closed, the line is powered, and the time-voltage type protection device 400 of the switch S1 detects that there is a delay on the left side and then closes. The opening indicator lamp L1 corresponding to the switch S1 displayed on the electric primary wiring analog display screen is turned off, and simultaneously the closing indicator lamp L2 is turned on. However, since the fault still exists, the switch S1 is turned on, the time-voltage type protection device 400 installed on the switch FB1 detects that the fault current trips immediately, and the closing indicator lamp L2 corresponding to the switch FB1 displayed on the electric primary wiring analog display screen is turned off, and the opening indicator lamp L1 is turned on.
5-switch S1 voltage-loss brake-separating
The switch FB1 is opened again, the time-voltage type protection device 400 installed on the switch S1 detects no voltage, the switch S1 is controlled to trip, the closing indicator lamp L2 corresponding to the switch S1 displayed by the electric primary wiring analog display screen is turned off, and the opening indicator lamp L1 is turned on.
6 switch S1 time-voltage type protection device 400 closes, sets the closing mark
Since the closing time of the switch S1 is shorter than the normal closing time, the time-voltage type protection device 400 installed in the switch S1 blocks the next incoming call closing according to the recorded fault flag.
7 reclosing timing, switch FB1 reclosing
After the time-voltage type protection device 400 provided with the switch FB1 trips in a fault, a second reclosing timing is started, when the reclosing time is up, the FB1 switch is reclosed for the second time, the opening indicator lamp L1 corresponding to the switch FB1 displayed on the electric primary wiring analog display screen is turned off, and meanwhile, the closing indicator lamp L2 is turned on.
8 switch S1 is closed because of locking, so it is no longer closed
Since the switch FB1 is closed and the line is powered, the switch S1 time-voltage type protection device 400 detects a voltage but has a closed-circuit-locked flag, and the switch S1 is not closed.
And simultaneously isolating the fault point by the left line, namely simultaneously leading the right line to isolate the fault point at the same time as the second step.
Switch L1 is switched on because of no pressure on left side
Due to the opening of the switch S2, the time-voltage type protection device 400 installed on the switch L1 detects the voltage loss on the left side, and closes after a delay. And an opening indicator lamp L1 corresponding to a switch L1 displayed on the electric primary wiring analog display screen is turned off, and meanwhile, a closing indicator lamp L2 is turned on.
10 switch S2 switch-on due to right side pressure
Due to the closing of the switch L1, the time-voltage type protection device 400 installed on the switch S2 detects the right side pressure, so that after the time delay, the switch is closed, the electric primary wiring simulation display screen turns off the switch-off indicator lamp L1 corresponding to the switch S2 shown in figure 3, and simultaneously, the switch-on indicator lamp L2 is turned on.
11) However, a fault exists, and after S2 reclosing, the switch FB2 trips
When the time-voltage type protection device 400 installed on the switch FB2 detects a fault current at the moment when the switch S2 is closed because a fault point is between the switch S1 and the switch S2, the switch FB2 immediately trips, and the closing indicator lamp L2 corresponding to the switch FB2 displayed on the electric primary wiring analog display screen is turned off and the opening indicator lamp L1 is turned on.
12) The switch S4, the switch S3 and the switch S2 are subjected to voltage loss tripping
Since the right side line is in a no-voltage state, the time-voltage type protection device 400 installed on the switch S4 detects no voltage, the control switch S4 trips, and the electric primary wiring simulation display screen thereof turns off the closing indicator lamp L2 corresponding to the switch S4 shown in fig. 3, and simultaneously turns on the opening indicator lamp L1. When the time-voltage type protection device 400 installed at the switch S3 for voltage loss tripping detects no voltage, the control switch S3 trips, the closing indicator lamp L2 corresponding to the switch S3 displayed by the electric primary wiring simulation display screen goes out, and the opening indicator lamp L1 is turned on at the same time.
When the time-voltage type protection device 400 installed at the switch S2 for voltage loss tripping detects no voltage, the control switch S2 trips, the closing indicator lamp L2 corresponding to the switch S2 displayed by the electric primary wiring simulation display screen goes out, and the opening indicator lamp L1 is turned on at the same time.
13) Time-voltage type protection device 400 of switch S2 closes, sets a closed-closing flag
Since the switch FB2 is opened when the switch S2 is closed, the time-voltage type protection device 400 installed in the switch S2 judges that the fault point is between the switch S1 and the switch S2 based on the recorded relevant opening time, and the time-voltage type protection device 400 installed in the switch S2 issues a closing lock command to set a closing lock flag so that the time-voltage type protection device 400 cannot be reclosed.
14) Reclosing timing, switch FB2 reclosing
After the time-voltage type protection device 400 of the switch FB2 trips due to a fault, reclosing timing is started, and the switch FB2 is reclosed after the timing time is up. And an opening indicator lamp L1 corresponding to a switch FB2 displayed on the electric primary wiring analog display screen is turned off, and simultaneously, a closing indicator lamp L2 is turned on.
15) Switch S4 press switch
Because the switch FB2 is re-closed, the line is electrified, the time-voltage type protection device 400 of the switch S4 detects that the right side has voltage and is closed after delay, the opening indicator lamp L1 corresponding to the switch S4 displayed by the electric primary wiring simulation display screen is turned off, and meanwhile, the closing indicator lamp L2 is turned on.
16) Switch S3 press switch
Since the switch FB2 recloses with the switch S4, the time-voltage type protection device 400 installed in the switch S3 detects that there is a right side pressure and thus a closing operation is performed. And an opening indicator lamp L1 corresponding to a switch S3 displayed on the electric primary wiring analog display screen is turned off, and meanwhile, a closing indicator lamp L2 is turned on.
18) The switch S2 is closed because of the locking, so it is no longer closed
Since the switch FB2 recloses, the line is energized, and the switch S2 time-voltage type protection device 400 detects a voltage but has a closed-circuit-locked flag, the switch S2 does not close.
19) The automatic isolation of the fault point between switch S1 and switch S2 was successfully completed.
The electric primary wiring simulation display screen can dynamically display the action condition of the switch at each moment. The ground process of automatically isolating faults can be visually observed.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A fault simulation display device, comprising:
a time-voltage type protection device (400), the time-voltage type protection device (400) being connected to the simulated circuit breaker module (300) and the fault current generation module (200), respectively;
a fault current generation module (200) for generating a fault current;
a simulated circuit breaker module (300) for simulating high voltage circuit breaker action;
an analog display module (100) for displaying a status of the analog circuit breaker module (300).
2. A fault simulation demonstration apparatus according to claim 1 wherein: the simulation circuit breaker is characterized in that a state indicator lamp (101) is arranged on the simulation display module (100), the state indicator lamp (101) is connected with the simulation circuit breaker module (300), and the simulation circuit breaker module (300) controls the on-off of the state indicator lamp (101).
3. A fault simulation demonstration apparatus according to claim 1 wherein: fault current takes place module (200) and includes alternating current contact voltage regulator (202) and on-off control circuit (201), alternating current contact voltage regulator (202) are used for producing electric current and voltage analog quantity, on-off control circuit's (201) input with alternating current contact voltage regulator (202) are connected, on-off control circuit's (201) output with time-voltage type protection device (400) are connected.
4. A fault simulation demonstration apparatus according to claim 3 wherein: switch control circuit (201) is including simulation fault button (2011), the one end of simulation fault button (2011) with it connects to exchange contact voltage regulator (202), the other end of simulation fault button (2011) with time-voltage type protection device (400) are connected.
5. A fault simulation demonstration apparatus according to claim 2 wherein: the simulation circuit breaker module (300) includes closing button (301), separating brake button (302), circuit breaker (303) and relay (304), the both ends of closing button (301) respectively with the power and the combined floodgate release HQ of circuit breaker (303) is connected, the both ends of separating brake button (302) respectively with the power and the separating brake release TQ of circuit breaker (303) is connected, the separating brake export (407) of time-voltage type protection device (400) with the separating brake release TQ of circuit breaker (303) is connected, the closing outlet (406) of time-voltage type protection device (400) with the combined floodgate release HQ of circuit breaker (303) is connected, the shift knob of circuit breaker (303) with relay (304) are connected.
6. The display device of claim 5, wherein: the state indicator lamp (101) comprises an opening indicator lamp L1, a closing indicator lamp L2 and an energy storage indicator lamp L3, and the opening indicator lamp L1, the closing indicator lamp L2 and the energy storage indicator lamp L3 are respectively connected with the relay (304).
7. The display device of claim 6, wherein: the circuit also comprises a first current-limiting resistor R1, a second current-limiting resistor R2 and a third current-limiting resistor R3, wherein the first current-limiting resistor R1 and a tripping indicator lamp L1 are sequentially connected in series and are connected to a power circuit through a normally closed contact of the relay (304); the second current limiting resistor R2 and the closing indicator lamp L2 are connected in series in sequence and are connected to a power circuit through a normally open contact of the relay (304); the third current limiting resistor R3 and the switching-off indicator lamp L1 are connected in series in sequence and are connected to a power circuit through a normally open contact of the relay (304).
8. A fault simulation demonstration apparatus according to claim 1 wherein: the system further comprises a communication management unit (500), a monitoring computer (600) and a display (700), wherein the communication management unit (500) is used for being connected with the monitoring computer (600) and the time-voltage type protection device (400), and the display (700) is connected with the monitoring computer (600).
9. A fault simulation demonstration apparatus according to claim 1 wherein: the time-voltage type protection device (400) comprises a central processing unit (410), and an analog quantity bus side voltage input (401), an analog quantity cable side voltage input (402), an analog quantity current input (403), an input quantity input (404), an LCD liquid crystal operation interface (405), a closing outlet (406), an opening outlet (407), an alarm signal outlet (408) and a communication circuit (409) which are connected with the central processing unit (410).
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| CN201921251987.9U CN210722065U (en) | 2019-08-02 | 2019-08-02 | Fault simulation display device |
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| CN201921251987.9U CN210722065U (en) | 2019-08-02 | 2019-08-02 | Fault simulation display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114724442A (en) * | 2022-03-26 | 2022-07-08 | 润建股份有限公司 | Combined type electric fire and safety electricity utilization monitoring system and demonstration method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114724442A (en) * | 2022-03-26 | 2022-07-08 | 润建股份有限公司 | Combined type electric fire and safety electricity utilization monitoring system and demonstration method thereof |
| CN114724442B (en) * | 2022-03-26 | 2024-05-14 | 润建股份有限公司 | Combined electrical fire and safety electricity consumption monitoring system and demonstration method thereof |
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