CN210982690U - Power monitoring circuit and system - Google Patents
Power monitoring circuit and system Download PDFInfo
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- CN210982690U CN210982690U CN201921238251.8U CN201921238251U CN210982690U CN 210982690 U CN210982690 U CN 210982690U CN 201921238251 U CN201921238251 U CN 201921238251U CN 210982690 U CN210982690 U CN 210982690U
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Abstract
The embodiment of the application provides a power supply monitoring circuit and a system, which comprise a first relay, a second relay, a first alarm device, a second alarm device and an output circuit; the first end of a first coil of the first relay is connected with the positive pole of a first power supply, and the second end of the first coil is connected with the negative pole of the first power supply; a first common end of the first relay is connected with the first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with a first end of the first alarm device, and a second end of the first alarm device is connected with the first control circuit; the first end of a second coil of the second relay is connected with the anode of a second power supply, the second end of the second coil is connected with the cathode of the second power supply, a first public end of the second relay is connected with a second control circuit, a second normally-closed contact corresponding to the first public end of the second relay is connected with the first end of a second alarm device, and the second end of the second alarm device is connected with the second control circuit.
Description
Technical Field
The application relates to the technical field of equipment power monitoring, in particular to a power monitoring circuit and a power monitoring system.
Background
At present, in order to avoid the influence of power failure on the normal operation of equipment, a plurality of important equipment are provided with redundant power supplies. However, when a power supply in the redundant power supplies fails, the maintainers cannot know which power supply fails in time, and need to perform manual detection on each power supply one by one, so that great risk exists in the operation of the equipment.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a power supply monitoring circuit and system, so as to achieve the technical effect of timely performing alarm prompt when a redundant power supply fails.
In a first aspect, an embodiment of the present application provides a power supply monitoring circuit, which includes a first relay, a second relay, a first alarm device, a second alarm device, and an output circuit; a first end of a first coil of the first relay is connected with the positive pole of a first power supply, and a second end of the first coil is connected with the negative pole of the first power supply; a first common end of the first relay is connected with a first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with a first end of the first alarm device, and a second end of the first alarm device is connected with the first control circuit; a second common end of the first relay is connected with the positive electrode of the first power supply, and a first normally open contact corresponding to the second common end of the first relay is connected with the positive electrode of the output circuit; a third common end of the first relay is connected with the negative electrode of the first power supply, and a second normally open contact corresponding to the third common end of the first relay is connected with the negative electrode of the output circuit; a first end of a second coil of the second relay is connected with the positive electrode of a second power supply, a second end of the second coil is connected with the negative electrode of the second power supply, a first common end of the second relay is connected with a second control circuit, a second normally-closed contact corresponding to the first common end of the second relay is connected with a first end of the second alarm device, and a second end of the second alarm device is connected with the second control circuit; a second common end of the second relay is connected with the positive electrode of the second power supply, and a third normally open contact corresponding to the second common end of the second relay is connected with the positive electrode of the output circuit; and a fourth normally open contact corresponding to the third common end of the second relay is connected with the negative electrode of the output circuit.
In the implementation process, the positive electrode and the negative electrode of a first power supply in the redundant power supply are respectively connected with two ends of a first coil of a first relay, a first public end of the first relay is connected with a first control circuit, a first normally closed contact corresponding to the first public end of the first relay is connected with a first end of a first alarm device, and a second end of the first alarm device is connected with the first control circuit. The positive electrode and the negative electrode of a second power supply in the redundant power supply are respectively connected with two ends of a second coil of a second relay, a first public end of the second relay is connected with a second control circuit, a second normally-closed contact corresponding to the first public end of the second relay is connected with a first end of a second alarm device, and a second end of the second alarm device is connected with the second control circuit. When the first power supply normally operates, the first coil is electrified, and the first normally closed contact is disconnected; once the first power supply fails, the first coil loses power, the first normally closed contact is closed, and the first alarm device is communicated with the first control circuit to give an alarm prompt; when the second power supply normally operates, the second coil is electrified, and the second normally closed contact is disconnected; once the second power supply breaks down, the second coil loses power, the second normally closed contact is closed, and the second alarm device is communicated with the second control circuit to give an alarm. The process realizes the technical effects of monitoring the running state of the redundant power supply in real time and giving an alarm in time when the redundant power supply fails.
Furthermore, a second common end of the first relay is connected with the positive electrode of the first power supply, and a first normally open contact corresponding to the second common end of the first relay is connected with the positive electrode of the output circuit; a third common end of the first relay is connected with the negative electrode of the first power supply, and a second normally open contact corresponding to the third common end of the first relay is connected with the negative electrode of the output circuit; a second common end of the second relay is connected with the positive electrode of the second power supply, and a third normally open contact corresponding to the second common end of the second relay is connected with the positive electrode of the output circuit; and a fourth normally open contact corresponding to the third common end of the second relay is connected with the negative electrode of the output circuit.
In the implementation process, the first relay and the second relay respectively provide two public endpoints to be connected with the positive electrode and the negative electrode of the corresponding power supply. One end point is connected with the anode of the corresponding power supply, and the normally open contact corresponding to the end point is connected with the anode of the output circuit; the other end point is connected with the negative pole of the corresponding power supply, and the normally open contact corresponding to the end point is connected with the negative pole of the output circuit. When the first power supply and the second power supply normally operate, the normally open contact is closed, the anode of the first power supply and the anode of the second power supply are communicated with the anode of the output loop, and the cathode of the first power supply and the cathode of the second power supply are communicated with the cathode of the output loop; when the first power supply fails, the first normally open contact and the second normally open contact are disconnected; when the second power supply fails, the third normally open contact and the fourth normally open contact are disconnected; through the process, when a certain power supply in the redundant power supplies fails, the power supply is timely disconnected, and the influence on the operation of equipment is avoided.
Further, a first diode is arranged between the first normally open contact and the anode of the output circuit, the anode of the first diode is connected with the first normally open contact, and the cathode of the first diode is connected with the anode of the output circuit; a second diode is arranged between the second normally-open contact and the negative electrode of the output circuit, the negative electrode of the second diode is connected with the second normally-open contact, and the positive electrode of the second diode is connected with the negative electrode of the output circuit; a third diode is arranged between the third normally-open contact and the anode of the output circuit, the anode of the third diode is connected with the third normally-open contact, and the cathode of the third diode is connected with the anode of the output circuit; and a fourth diode is arranged between the fourth normally-open contact and the negative electrode of the output circuit, the negative electrode of the fourth diode is connected with the fourth normally-open contact, and the positive electrode of the fourth diode is connected with the negative electrode of the output circuit.
In the implementation process, a first diode is arranged between the first normally open contact and the anode of the output circuit, the anode of the first diode is connected with the first normally open contact, and the cathode of the first diode is connected with the anode of the output circuit; a second diode is arranged between the second normally-open contact and the negative electrode of the output circuit, the negative electrode of the second diode is connected with the second normally-open contact, and the positive electrode of the second diode is connected with the negative electrode of the output circuit; a third diode is arranged between the third normally-open contact and the anode of the output circuit, the anode of the third diode is connected with the third normally-open contact, and the cathode of the third diode is connected with the anode of the output circuit; and a fourth diode is arranged between the fourth normally open contact and the negative electrode of the output circuit, the negative electrode of the fourth diode is connected with the fourth normally open contact, and the positive electrode of the fourth diode is connected with the negative electrode of the output circuit. The mode utilizes the one-way conductivity of the diode to isolate each power supply in the redundant power supply, so that the power supplies are not interfered with each other.
Further, the power supply monitoring circuit further includes: a fifth diode connected in parallel with the first coil, wherein an anode of the fifth diode is connected with a cathode of the first power supply, and a cathode of the fifth diode is connected with an anode of the first power supply; and the anode of the sixth diode is connected with the cathode of the second power supply, and the cathode of the sixth diode is connected with the anode of the second power supply.
In the implementation process, the fifth diode is connected with the first coil in parallel and used for absorbing the reverse high voltage generated after the first coil loses power, and the sixth diode is connected with the second coil in parallel and used for absorbing the reverse high voltage generated after the second coil loses power, so that the electronic element in the power supply monitoring circuit is prevented from being damaged by the reverse high voltage generated by the first coil or the second coil.
Further, the output circuit includes: the third relay is arranged on the output circuit, a first end of a third coil of the third relay is connected with the positive electrode of the output circuit, a second end of the third coil is connected with the negative electrode of the output circuit, a first public end of the third relay is connected with a power output indicator lamp, the power output indicator lamp is connected with a power output indicator lamp control circuit, and a fifth normally-on contact corresponding to the first public end of the third relay is connected with the power output indicator lamp control circuit.
In the implementation process, a third relay is arranged on the output circuit, two ends of a third coil of the third relay are respectively connected with the positive electrode and the negative electrode of the output circuit, a first common end of the third relay is connected with a power output indicator lamp, the power output indicator lamp is connected with a power output indicator lamp control circuit, and a fifth normally-on contact corresponding to the first common end of the third relay is connected with the power output indicator lamp control circuit; when the positive and negative electrodes of the power supply and the output circuit are normally connected, the third coil is electrified, the fifth normally-open contact is closed, the power output indicator lamp is conducted with the power output indicator lamp control circuit, the power output indicator lamp is turned on, when the redundant power supply fails, the third coil is electrified, the fifth normally-open contact is turned off, and the power output indicator lamp is turned off. By the aid of the mode, the power supply state of the output circuit is monitored in real time, and circuit faults are found in time.
Further, the output circuit further comprises a seventh diode connected with the third coil in parallel, wherein the anode of the seventh diode is connected with the cathode of the output circuit, and the cathode of the seventh diode is connected with the anode of the output circuit.
In the implementation process, the seventh diode is connected with the third coil in parallel and used for absorbing the reverse high voltage generated by the third coil and avoiding mistakenly touching the third relay.
Further, the first alarm device and the second alarm device are audible and visual alarms.
In the implementation process, the audible and visual alarm is selected as the alarm device, and when the corresponding power supply fails, the audible and visual alarm device flickers and broadcasts alarm information, so that the maintainer can more timely know the failed power supply.
Further, the power supply monitoring circuit further includes: a first power indicator connected to the first relay; a second power indicator connected to the second relay; a fourth common end of the first relay is connected with the first control circuit, and a sixth normally open contact corresponding to the fourth common end of the first relay is connected with the first power indicator; and a seventh normally open contact corresponding to the fourth common end of the second relay is connected with the second power indicator.
In the implementation process, the first power supply and the second power supply are respectively provided with corresponding power supply indicating lamps, and when the first power supply normally operates, the first power supply indicating lamps are turned on; when the first power fails, the first power indicator lamp is turned off. When the second power supply normally runs, the second power supply indicator lamp is turned on; when the second power supply fails, the second power supply indicator lamp is turned off, and the real-time monitoring of the running state of the power supply is realized.
In a second aspect, an embodiment of the present application provides a power monitoring system, which includes a control platform, and a plurality of power monitoring circuits disposed in the control platform. The power supply monitoring circuit comprises a first relay, a second relay, a first alarm device, a second alarm device and an output circuit; a first end of a first coil of the first relay is connected with the positive pole of a first power supply, and a second end of the first coil is connected with the negative pole of the first power supply; the first common end of the first relay is connected with a first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with the first end of the first alarm device, and the second end of the first alarm device is connected with the first control circuit. The first end of the second coil of the second relay is connected with the anode of the second power supply, the second end of the second coil is connected with the cathode of the second power supply, the first public end of the second relay is connected with the second control circuit, the second normally closed contact corresponding to the first public end of the second relay is connected with the first end of the second alarm device, and the second end of the second alarm device is connected with the second control circuit.
In the implementation process, the control platform is provided with a plurality of power supply monitoring circuits. In the power supply monitoring circuit, the positive electrode and the negative electrode of a first power supply are respectively connected with two ends of a first coil of a first relay, a first common end of the first relay is connected with a first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with a first end of a first alarm device, and a second end of the first alarm device is connected with the first control circuit; the positive electrode and the negative electrode of the second power supply are respectively connected with two ends of a second coil of the second relay, a first public end of the second relay is connected with the second control circuit, a second normally-closed contact corresponding to the first public end of the second relay is connected with a first end of the second alarm device, and a second end of the second alarm device is connected with the second control circuit. When the first power supply normally operates, the first coil is electrified, and the first normally closed contact is disconnected; once the first power supply fails, the first coil loses power, the first normally closed contact is closed, and the first alarm device is communicated with the first control circuit to give an alarm prompt; when the second power supply normally operates, the second coil is electrified, and the second normally closed contact is disconnected; once the second power supply breaks down, the second coil loses power, the second normally closed contact is closed, and the second alarm device is communicated with the second control circuit to give an alarm. The power supply monitoring of a plurality of devices provided with redundant power supplies is realized through the arranged control platform, and the monitoring efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a power supply monitoring circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a relay pin connection provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a power supply monitoring system according to an embodiment of the present application.
Icon: 10-a power supply monitoring system; 100-power supply monitoring circuit; 200-control platform.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a power monitoring circuit according to an embodiment of the present disclosure; fig. 2 is a schematic diagram of a relay pin connection provided in an embodiment of the present application.
The power supply monitoring circuit provided by the embodiment of the application comprises a first relay, a second relay, a first alarm device, a second alarm device and an output circuit; the first end of a first coil KA1 of the first relay is connected with the positive pole (A +) of a first power supply, and the second end of the first coil KA1 is connected with the negative pole (A-) of the first power supply; the first common end of the first relay is connected with the first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with the first end of the first alarm device J1, and the second end of the first alarm device J1 is connected with the first control circuit. The first end of a second coil KA2 of the second relay is connected with the positive electrode (B +) of the second power supply, the second end of the second coil KA2 is connected with the negative electrode (B-) of the second power supply, the first public end of the second relay is connected with the second control circuit, a second normally closed contact corresponding to the first public end of the second relay is connected with the first end of the second alarm device J2, and the second end of the second alarm device J2 is connected with the second control circuit. Can in time report to the police and indicate when power failure, make things convenient for the maintainer in time to maintain.
Illustratively, when the first power supply fails to operate, the first coil KA1 loses power, the switch K1 formed by the first common end of the first relay and the normally closed contact corresponding to the first common end is closed, the first control circuit is powered on, the first alarm device J1 gives an alarm prompt, when the second power supply fails to operate, the second coil KA2 loses power, the switch K2 formed by the first common end of the second relay and the normally closed contact corresponding to the first common end is closed, the second control circuit is powered on, and the second alarm device J2 gives an alarm prompt.
In a possible implementation mode, the first alarm device J1 and the second alarm device J2 are acoustic-optical alarms, and when the first power supply or the second power supply fails, the corresponding acoustic-optical alarm devices are started to give an alarm. After the maintainer confirms the power that breaks down, can close audible and visual alarm device through the manual switch that sets up. The first relay and the second relay are 14-pin 24V relays, such as relays with the model number of G2R-14-AC 24.
It should be noted that the first alarm device J1 and the second alarm device J2 are not limited to audible and visual alarms, and may be a voice broadcast module, such as a speaker, a stereo, and the like.
The fourth common end of the first relay is connected with the first control circuit, a sixth normally open contact corresponding to the fourth common end of the first relay is connected with the first power indicator L1, the fourth common end of the second relay is connected with the second control circuit, and a seventh normally open contact corresponding to the fourth common end of the second relay is connected with the second power indicator L2, so that the running states of the first power supply and the second power supply are displayed in real time.
Illustratively, when the first power supply normally operates, the first coil KA1 is powered on, the switch K3 formed by the fourth common end of the first relay and the normally open contact corresponding to the common end is closed, the first power indicator L is turned on, when the first power supply fails, the first coil KA1 is powered off, the switch K3 is turned off, and the first power indicator L is turned off.
A second common end of the first relay is connected with the positive electrode of the first power supply, and a first normally open contact corresponding to the second common end of the first relay is connected with the positive electrode of the output circuit; a third common end of the first relay is connected with the negative electrode of the first power supply, and a second normally open contact corresponding to the third common end of the first relay is connected with the negative electrode of the output circuit; a second common end of the second relay is connected with the positive electrode of the second power supply, and a third normally open contact corresponding to the second common end of the second relay is connected with the positive electrode of the output circuit; and a fourth normally open contact corresponding to the third common end of the second relay is connected with the negative electrode of the output circuit. The power supply process of each power supply is automatically controlled by using the relay, so that the power supply of the equipment is prevented from being influenced by the fault of a single power supply.
Illustratively, when the first power supply operates normally, the first coil KA1 is powered on, the switch K5 composed of the second common end of the first relay and the first normally open contact corresponding to the common end is closed, the switch K6 composed of the third common end of the first relay and the second normally open contact corresponding to the common end is closed, and the first power supply supplies power to the equipment normally. When the first power supply fails to operate, the first coil KA1 loses power, and K5 and K6 are disconnected. And a switch K7 formed by the second common end of the second relay and the third normally open contact corresponding to the common end is closed, a switch K8 formed by the third common end of the second relay and the fourth normally open contact corresponding to the common end is closed, and the second power supply normally supplies power to the equipment. When the first power supply fails to operate, the first coil KA1 loses power, and K7 and K8 are disconnected.
A first diode D1 is arranged between the first normally open contact and the anode of the output circuit, the anode of the first diode D1 is connected with the first normally open contact, and the cathode of the first diode D1 is connected with the anode of the output circuit. A second diode D2 is arranged between the second normally open contact and the cathode of the output circuit, the cathode of the second diode D2 is connected with the second normally open contact, and the anode of the second diode D2 is connected with the cathode of the output circuit. A third diode D3 is arranged between the third normally-open contact and the anode of the output circuit, the anode of the third diode D3 is connected with the third normally-open contact, and the cathode of the third diode D3 is connected with the anode of the output circuit. A fourth diode D4 is arranged between the fourth normally open contact and the cathode of the output circuit, the cathode of the fourth diode D4 is connected with the fourth normally open contact, and the anode of the fourth diode D4 is connected with the cathode of the output circuit.
The process utilizes the unidirectional conductivity of the diodes, and the redundant power supplies are isolated through the arranged first diode D1, second diode D2, third diode D3 and fourth diode D4, so that the redundant power supplies are prevented from interfering with each other.
The output circuit provided by the embodiment of the application comprises: the third relay is arranged between the positive electrode and the negative electrode of the output circuit, the first end of a third coil KA3 of the third relay is connected with the positive electrode of the output circuit, the second end of the third coil KA3 is connected with the negative electrode of the output circuit, a first public end of the third relay is connected with a power output indicator lamp, the power output indicator lamp is connected with a power output indicator lamp control circuit, and a fifth normally-open contact corresponding to the first public end of the third relay is connected with the power output indicator lamp control circuit.
Illustratively, when the redundant power supply normally supplies power to the equipment, the switch K9 formed by the first common end of the third coil KA3 and the normally open contact corresponding to the first common end is closed, the power output indicator lamp control circuit supplies power to the power output indicator lamp, and the power output indicator lamp is turned on. When the redundant power supply fails, K9 is disconnected, and real-time monitoring of the power supply of the output circuit is achieved.
The embodiment provided by the application also comprises a fifth diode D5 connected with the first coil KA1 in parallel, a sixth diode D6 connected with the second coil KA2 in parallel and a seventh diode D7 connected with the third coil KA3 in parallel, wherein the fifth diode D5, the sixth diode D6 and the seventh diode D7 are free-wheeling diodes. The anode of the fifth diode D5 is connected with the cathode of the first power supply, and the cathode of the fifth diode D5 is connected with the anode of the first power supply; the anode of the sixth diode D6 is connected with the cathode of the second power supply, and the cathode of the sixth diode D6 is connected with the anode of the second power supply; the anode of the seventh diode D7 is connected to the cathode of the output circuit, and the cathode of the seventh diode D7 is connected to the anode of the output circuit. The reverse high voltage generated by the first coil KA1, the second coil KA2 and the third coil KA3 is absorbed by the arranged diodes, so that the electronic elements in the power supply monitoring circuit are protected.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a power monitoring system according to an embodiment of the present disclosure.
The utility model provides a power supply monitoring system 10 includes control platform 200, a plurality of settings are in power supply monitoring circuit 100 in the control platform 200, first alarm device J1 among the power supply monitoring circuit 100, second alarm device J2, first power indicator L1, second power indicator L2, power output indicator L3 sets up on control platform 200's control panel, the first alarm device J1 of every equipment, second alarm device J2, first power indicator L1, second power indicator L2, power output indicator L3 etc. set up same region, be convenient for in time learn when redundant power supply breaks down the concrete position of the power that has the trouble, realize the power monitoring to a plurality of equipment.
In summary, the embodiment of the present application provides a power supply monitoring circuit and system, including a first relay, a second relay, a first alarm device, a second alarm device, and an output circuit; the first end of a first coil of the first relay is connected with the positive pole of a first power supply, and the second end of the first coil is connected with the negative pole of the first power supply; a first common end of the first relay is connected with the first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with a first end of the first alarm device, and a second end of the first alarm device is connected with the first control circuit; a first end of a second coil of the second relay is connected with the anode of a second power supply, a second end of the second coil is connected with the cathode of the second power supply, a first common end of the second relay is connected with a second control circuit, a second normally-closed contact corresponding to the first common end of the second relay is connected with a first end of a second alarm device, and a second end of the second alarm device is connected with the second control circuit; the alarm prompt is timely carried out when the power supply fails.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A power supply monitoring circuit is characterized by comprising a first relay, a second relay, a first alarm device, a second alarm device and an output circuit;
a first end of a first coil of the first relay is connected with the positive pole of a first power supply, and a second end of the first coil is connected with the negative pole of the first power supply; a first common end of the first relay is connected with a first control circuit, a first normally closed contact corresponding to the first common end of the first relay is connected with a first end of the first alarm device, and a second end of the first alarm device is connected with the first control circuit;
the first end of the second coil of the second relay is connected with the anode of the second power supply, the second end of the second coil is connected with the cathode of the second power supply, the first public end of the second relay is connected with the second control circuit, the second normally closed contact corresponding to the first public end of the second relay is connected with the first end of the second alarm device, and the second end of the second alarm device is connected with the second control circuit.
2. The power supply monitoring circuit according to claim 1, wherein the second common terminal of the first relay is connected to the positive electrode of the first power supply, and the first normally open contact corresponding to the second common terminal of the first relay is connected to the positive electrode of the output circuit; a third common end of the first relay is connected with the negative electrode of the first power supply, and a second normally open contact corresponding to the third common end of the first relay is connected with the negative electrode of the output circuit;
a second common end of the second relay is connected with the positive electrode of the second power supply, and a third normally open contact corresponding to the second common end of the second relay is connected with the positive electrode of the output circuit; and a fourth normally open contact corresponding to the third common end of the second relay is connected with the negative electrode of the output circuit.
3. The power supply monitoring circuit according to claim 2, wherein a first diode is arranged between the first normally-open contact and the positive electrode of the output circuit, the positive electrode of the first diode is connected with the first normally-open contact, and the negative electrode of the first diode is connected with the positive electrode of the output circuit;
a second diode is arranged between the second normally-open contact and the negative electrode of the output circuit, the negative electrode of the second diode is connected with the second normally-open contact, and the positive electrode of the second diode is connected with the negative electrode of the output circuit;
a third diode is arranged between the third normally-open contact and the anode of the output circuit, the anode of the third diode is connected with the third normally-open contact, and the cathode of the third diode is connected with the anode of the output circuit;
and a fourth diode is arranged between the fourth normally-open contact and the negative electrode of the output circuit, the negative electrode of the fourth diode is connected with the fourth normally-open contact, and the positive electrode of the fourth diode is connected with the negative electrode of the output circuit.
4. The power supply monitoring circuit of claim 1, further comprising:
a fifth diode connected in parallel with the first coil, wherein an anode of the fifth diode is connected with a cathode of the first power supply, and a cathode of the fifth diode is connected with an anode of the first power supply;
and the anode of the sixth diode is connected with the cathode of the second power supply, and the cathode of the sixth diode is connected with the anode of the second power supply.
5. The power supply monitoring circuit of claim 1, wherein the output circuit comprises:
the third relay is arranged on the output circuit, a first end of a third coil of the third relay is connected with the positive electrode of the output circuit, a second end of the third coil is connected with the negative electrode of the output circuit, a first public end of the third relay is connected with a power output indicator lamp, the power output indicator lamp is connected with a power output indicator lamp control circuit, and a fifth normally-on contact corresponding to the first public end of the third relay is connected with the power output indicator lamp control circuit.
6. The power monitoring circuit of claim 5, wherein the output circuit further comprises a seventh diode connected in parallel with the third coil, an anode of the seventh diode being connected to a cathode of the output circuit, a cathode of the seventh diode being connected to an anode of the output circuit.
7. The power monitoring circuit of claim 1, wherein the first and second alarm devices are audible and visual alarms.
8. The power supply monitoring circuit of claim 1, further comprising:
a first power indicator connected to the first relay;
a second power indicator connected to the second relay;
a fourth common end of the first relay is connected with the first control circuit, and a sixth normally open contact corresponding to the fourth common end of the first relay is connected with the first power indicator;
and a seventh normally open contact corresponding to the fourth common end of the second relay is connected with the second power indicator.
9. A power supply monitoring system is characterized by comprising a control platform; a plurality of power supply monitoring circuits as claimed in any one of claims 1 to 8 disposed within the control platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921238251.8U CN210982690U (en) | 2019-08-01 | 2019-08-01 | Power monitoring circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921238251.8U CN210982690U (en) | 2019-08-01 | 2019-08-01 | Power monitoring circuit and system |
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| Publication Number | Publication Date |
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| CN210982690U true CN210982690U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921238251.8U Active CN210982690U (en) | 2019-08-01 | 2019-08-01 | Power monitoring circuit and system |
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| Country | Link |
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| CN (1) | CN210982690U (en) |
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2019
- 2019-08-01 CN CN201921238251.8U patent/CN210982690U/en active Active
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