CN201838976U - Electric leakage monitor with screen display function for electrical equipment - Google Patents

Abstract

The utility model discloses a leakage monitor for electrical equipment with a screen display function, which comprises a one-way 8-channel switch chip, an operational amplification chip, a two-way 4-channel switch chip, a main control chip, a latch drive chip, a relay, a voice Alarm chip, display screen; the input end of the unidirectional 8-channel switch chip is connected to the terminal probe for detecting current or temperature signal, the unidirectional 8-channel switch chip, the operational amplifier chip, the bidirectional 4-channel switch chip, and the main control chip are connected in sequence , the latch driver chip, the voice alarm chip, and the display screen are all connected to the main control chip, and the relay is connected to the latch driver chip. The purpose of the utility model is to provide a multi-functional electric equipment leakage monitor capable of displaying the status of the monitored equipment and protecting safety.

Description

A leakage monitor for electrical equipment with screen display function

technical field

The utility model relates to an electrical equipment leakage monitor with a screen display function, which is used in an electrical equipment leakage monitoring device. the

Background technique

In the operation of transmission lines, the terminal power network spreads to thousands of households. Due to the lack of relevant advanced, highly reliable, and fully functional protective devices in the end user's transmission lines, the overload and short circuit of the transmission line will cause fires, leakages, and even casualties, as well as overvoltage, undervoltage, and induced lightning in series to damage electrical equipment. Electricity accidents happen frequently. These potential and sudden hidden dangers that cannot be prevented have become a major hazard to the safe use of electricity for human beings. At present, the protective devices used for protection, such as fuses, leakage switches, and circuit breakers, have played a certain role, but their functions are limited, and the status of the monitored equipment cannot be displayed in real time, and the protection is not comprehensive and the reliability is not good. To overcome the above shortcomings, useful improvements have been made. the

Utility model content

The utility model overcomes the disadvantages of the above-mentioned technologies, and provides a multi-functional electric equipment leakage monitor capable of displaying the status of the monitored equipment and providing protection and safety. the

In order to achieve the above object, the utility model adopts the following technical solutions:

A leakage monitor for electrical equipment with a screen display function, comprising a unidirectional 8-channel switch chip 1, an operational amplifier chip 2, a bidirectional 4-channel switch chip 3, a main control chip 4, a latch driver chip 5, and a relay 6, Voice alarm chip 7, display screen 9; the input terminal of the unidirectional 8-channel switch chip 1 is connected with the terminal probe for detecting current or temperature signal, the unidirectional 8-channel switch chip 1, the operational amplifier chip 2, and the bidirectional 4-channel switch chip 3 , the main control chip 4 is connected in sequence, the latch driver chip 5, the voice alarm chip 7, and the display screen 9 are all connected to the main control chip 4, and the relay 6 is connected to the latch driver chip 5. the

The utility model also includes an alarm indicator light 8 and a communication chip 12 connected with the main control chip 4 . The communication chip 12 is used for connecting with a computer. the

Compared with the prior art, the beneficial effects of the utility model are:

1. Real-time display of residual current value, temperature value, current value and circuit number;

2. It can be fixed or scrollable to display the residual current value, temperature value and current value of the specified circuit;

3. When there are multiple loops warning at the same time, the warning value and current real-time value of each loop are scrolled;

4. It is free to decide whether each circuit needs to be monitored;

5. The early warning value of each loop can be set freely and completely independent;

6. Any trip value can be set freely, and the trip function can also be turned off;

7. With fault memory query function, it can store more than 10,000 fault records;

8. It has various communication and linkage functions with the fire center;

9. With sound and light alarm function;

10. With remote local reset and self-test function;

11. It has a clock function, which can set and display the current date and time;

12. Due to the existence of the battery chip, it can play a role in continuous power supply when the power is abnormally cut off. the

Description of drawings

Fig. 1 is a block diagram of the utility model. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment of the present utility model, be described in further detail:

Referring to Fig. 1, the utility model is a leakage monitor for electrical equipment with a screen display function, including a unidirectional 8-channel switch chip 1, an operational amplifier chip 2, a bidirectional 4-channel switch chip 3, a main control chip 4, a latch Device driver chip 5, relay 6, voice alarm chip 7, display screen 9; the input terminal of the unidirectional 8-channel switch chip 1 is connected with the terminal probe for detecting current or temperature signal, the unidirectional 8-channel switch chip 1, and the operational amplifier chip 2. The two-way 4-channel switch chip 3 and the main control chip 4 are connected in sequence, the latch drive chip 5, the voice alarm chip 7, and the display screen 9 are all connected to the main control chip 4, and the relay 6 and the latch Device driver chip 5 is connected. the

The utility model also includes an alarm indicator light 8 and a communication chip 12 connected with the main control chip 4 . The communication chip 12 is used for connecting with a computer. the

The model of the unidirectional 8-channel switch chip 1 is 74HC4051. The model of the operational amplifier chip 2 is LM358. The model of the bidirectional 4-channel switch chip 3 is 74HC4066. The model of the main control chip 4 is C8051F310. The model of the latch driver chip 5 is 74HC595. The model of the voice alarm chip 7 is AP89010. the

The working principle of the utility model is as follows:

When the current, temperature and other parameters in the electrical equipment change suddenly, the terminal probes such as residual current transformers, temperature sensors, etc. use the electromagnetic field induction principle and the change of temperature effect to collect the information and send it to the monitoring detector; After the unidirectional 8-channel switch chip 1, the signal is amplified by the operational amplifier chip 2, and after the bidirectional 4-channel switch chip 3 is sent to the main control chip 4, the main control chip 4 analyzes, judges, and The set value is compared, once the set value is exceeded; the main control chip 4 will drive the relay 6 through the latch drive chip 5 to cut off the power supply, so that the electrical equipment is disconnected from the mains, and the alarm indicator light is lit, and the main control chip The chip 4 simultaneously sends out a drive signal to drive the voice alarm chip 7 to send out a voice alarm signal; at the same time, the main control chip 4 controls the display screen 9 to display the effective value through 4 internal A/D conversion and data processing. the

Claims (9)

1. electric equipment leakage current detect device with screen display function, include unidirectional 8 channel switch chips (1), chip (2) is amplified in computing, two-way 4 channel switch chips (3), main control chip (4), latch chip for driving (5), relay (6), audio alert chip (7), display screen (9); Described unidirectional 8 channel switch chip (1) inputs are connected with the terminal probe that detects electric current or temperature signal, unidirectional 8 channel switch chips (1), chip (2) is amplified in computing, two-way 4 channel switch chips (3), main control chip (4) connects in turn, described latch chip for driving (5), audio alert chip (7), display screen (9) all is connected on the main control chip (4), and described relay (6) is connected with latch chip for driving (5).

2. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that also including the alarm lamp (8) that is connected with main control chip (4).

3. a kind of electric equipment leakage current detect device with screen display function according to claim 1 and 2 is characterized in that also including the communication chip (12) that is used to connect computer, and this communication chip (12) is connected with main control chip (4).

4. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that described unidirectional 8 channel switch chip (1) models are 74HC4051.

5. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that it is LM358 that chip (2) model is amplified in described computing.

6. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that described two-way 4 channel switch chip (3) models are 74HC4066.

7. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that described main control chip (4) model is C8051F310.

8. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that described latch chip for driving (5) model is 74HC595.

9. a kind of electric equipment leakage current detect device with screen display function according to claim 1 is characterized in that described audio alert chip (7) model is AP89010.