CN202159959U

CN202159959U - Safe electricity-saving protection device

Info

Publication number: CN202159959U
Application number: CN201120268893XU
Authority: CN
Inventors: 周华宜
Original assignee: 周华宜
Current assignee: Yangzhou true cow Machinery Co., Ltd.
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-03-07
Anticipated expiration: 2021-07-27

Abstract

The utility model discloses a safe electricity-saving protection device in the field of circuit facility protecting device, comprising a current transformer and a voltage transformer. The current transformer is connected with a sampling circuit 1. The output end of the sampling circuit 1 is connected with an input end of a CPU through an A/D conversion circuit. The voltage transformer is connected with a sampling circuit 2. The output end of the sampling circuit 2 is connected with the input end of the CPU through the A/D conversion circuit. The output end of the CPU is connected with a relay control circuit. The relay control circuit is connected with a relay 1 and a relay 2 for controlling on/off of the breaker. The input end of the CPU is connected with a signal setting unit. The CPU is connected with a display unit. No-load or overload of the circuit is judged through power in the detection circuit. The on/off control of the breaker is realized to reach the effect of safe use of electricity. The energy source is saved and the circuit is also protected. The utility model is widely applied to enterprises and institutions, and can be applied to the place with limitation to service power.

Description

A kind of safety electricity-saving protective device

Technical field

The utility model relates to a kind of protective device of circuit facility, particularly a kind of safety electricity-saving protective device.

Background technology

Modern power systems requires increasingly high to automation, particularly measure automatically and control automatically, in the electricity consumption of existing enterprises and institutions; When enterprises and institutions came off duty, each electrical equipment is in stopped using or holding state, and these electrical equipment that are under inactive or the holding state have a certain amount of no-load power loss under the situation of energising; Produced the waste of the bigger energy, run counter to the strategic development target of China's energy-saving and emission-reduction, under normal electricity consumption situation; Power in the circuit should be in the interval; When power in the circuit is lower than interval minimum, explains that the power consumption equipment in circuit this moment is in inactive or holding state, thereby have the waste of the energy; When the power in the circuit during greater than the maximum in interval; Possibly there is the phenomenon of overload in some equipment in the circuit explained, possibly exceed scope of design, makes circuit have certain potential safety hazard.

The utility model content

The purpose of the utility model provides a kind of safety electricity-saving protective device, makes to have reduced the no-load power consumption that is in the electrical equipment under the non-working condition in the circuit, has practiced thrift the energy, also circuit is played the effect of protection simultaneously.

The purpose of the utility model is achieved in that a kind of safety electricity-saving protective device; Comprise current transformer and voltage transformer, current transformer links to each other with sample circuit one, and the output of said sample circuit one links to each other with the input of CPU through the A/D change-over circuit; Said voltage transformer links to each other with sample circuit two; The output of sample circuit two links to each other with the input of CPU through the A/D change-over circuit, and the output of CPU links to each other with control relay circuit, and said control relay circuit links to each other with relay one, relay two that the control circuit breaker cut-offs; The input of CPU also links to each other with the signal sets unit, the last display unit that also is connected with of CPU.

When the utility model uses; Set an initialize signal (promptly using the interval value of the power in the electric line) through the signal sets unit to CPU earlier; Current transformer and voltage transformer are installed in side circuit, the data of the data of the current transformer that obtains through sample circuit one, the voltage transformer that sample circuit two obtains, the analog signal conversion that through the A/D change-over circuit sample circuit is obtained respectively becomes digital signal to give CPU; CPU carries out computing and comparison with the digital signal that obtains; When the data that obtain after the computing are lower than the minimum of set point, explain that the electrical equipment in the circuit is in inactive or holding state, when the data that obtain after the computing are higher than set point; The phenomenon that has overload in the circuit is described; This moment, CPU outputed signal to control relay circuit, and control relay circuit breaks off circuit breaker through control relay, and the display unit in the utility model can show instantaneous operational data (as: operating current, voltage, power and time).Compared with prior art; The beneficial effect of the utility model is: reduced the no-load power consumption that is in the electrical equipment under the non-working condition in the circuit, practiced thrift the energy, eliminated the potential safety hazard that exists because of overload in the circuit; Play the effect of safety utilization of electric power, circuit has been played protective effect.The utility model can also can be used on using the conditional place of power in enterprises and institutions.

As the further improvement of the utility model, said CPU also links to each other with the transmitting and receiving module that Controlled CPU is connected with main computer unit.The utility model can be a plurality of through being provided with, and unify control through main frame, thus make can realize unified control through remote monitoring to the utility model, long-range extraction data have improved automaticity.

Description of drawings

Fig. 1 is the utility model control principle block diagram.

Embodiment

A kind of safety electricity-saving protective device as shown in Figure 1; Comprise current transformer and voltage transformer; Current transformer links to each other with sample circuit one, and the output of said sample circuit one links to each other with the input of CPU through the A/D change-over circuit, and said voltage transformer links to each other with sample circuit two; The output of sample circuit two links to each other with the input of CPU through the A/D change-over circuit; The output of CPU links to each other with control relay circuit, and said control relay circuit links to each other with relay one, relay two that the control circuit breaker cut-offs, and the input of CPU also links to each other with the signal sets unit; The last display unit that also is connected with of CPU, CPU also links to each other with the transmitting and receiving module that Controlled CPU is connected with main computer unit.

When the utility model uses, set an initialize signal (promptly using the interval value of the power in the electric line) through the signal sets unit to CPU earlier, current transformer and voltage transformer are installed in side circuit; The data of the data of the current transformer that obtains through sample circuit one, the voltage transformer that sample circuit two obtains, the analog signal conversion that through the A/D change-over circuit sample circuit is obtained respectively becomes digital signal to give CPU, and CPU carries out computing and comparison with the digital signal that obtains; When the data that obtain after the computing are lower than the minimum of set point; Explain that the electrical equipment in the circuit is in inactive or holding state, this moment, CPU outputed signal to control relay circuit, and control relay circuit control relay control circuit breaker time-delay 5S breaks off; Thereby reduced the no-load power consumption that is in the electrical equipment under the non-working condition in the circuit; Practiced thrift the energy, when the data that obtain after the computing are higher than set point, the phenomenon that has overload in the circuit has been described; This moment, CPU outputed signal to control relay circuit; Control relay circuit is through control relay, and relay control solenoid breaks off circuit breaker immediately, has eliminated the potential safety hazard that exists because of overload in the circuit; Play the effect of safety utilization of electric power, circuit has been played protective effect; Display unit in the utility model can show operational data (as: operating current, voltage, power and time) timely; The utility model can link to each other with main frame through transmitting and receiving module, realizes the unified control of main frame to a plurality of the utility model, thereby has improved automaticity.

The utility model is not limited to the foregoing description; On the basis of the disclosed technical scheme of the utility model; Those skilled in the art is according to disclosed technology contents; Do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the protection range of the utility model.

Claims

1. a safety electricity-saving protective device is characterized in that, comprises current transformer and voltage transformer; Current transformer links to each other with sample circuit one; The output of said sample circuit one links to each other with the input of CPU through the A/D change-over circuit, and said voltage transformer links to each other with sample circuit two, and the output of sample circuit two links to each other with the input of CPU through the A/D change-over circuit; The output of CPU links to each other with control relay circuit; Said control relay circuit links to each other with relay one, relay two that the control circuit breaker cut-offs, and the input of CPU also links to each other with the signal sets unit, the last display unit that also is connected with of CPU.

2. a kind of safety electricity-saving protective device according to claim 1 is characterized in that said CPU also links to each other with the transmitting and receiving module that Controlled CPU is connected with main computer unit.