CN211453908U - Multifunctional network instrument with electric leakage detection function - Google Patents

Multifunctional network instrument with electric leakage detection function Download PDF

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Publication number
CN211453908U
CN211453908U CN201922169278.2U CN201922169278U CN211453908U CN 211453908 U CN211453908 U CN 211453908U CN 201922169278 U CN201922169278 U CN 201922169278U CN 211453908 U CN211453908 U CN 211453908U
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instrument
terminals
zero sequence
sequence current
current
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汪成效
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Zhejiang Anzhong Technology Co ltd
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Zhejiang Anzhong Technology Co ltd
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Abstract

The utility model discloses a multifunctional network instrument who possesses electric leakage detection function, the load simulator comprises an instrument body, the work power supply terminal, measure the voltage terminal, measure the current terminal, measure the zero sequence current terminal, the communication terminal, output terminal and input terminal, when the instrument detects the electric leakage, gather instrument monitoring loop through zero sequence current transformer, A, B, C three-phase and N zero line in the return circuit pass zero sequence current transformer simultaneously, there is the leakage current when zero sequence current transformer detecting system, zero sequence current transformer inputs the zero sequence current for the instrument body, through the inside enlarged operational circuit of instrument body, the LED display screen that passes through the instrument body with the electric leakage current value shows. The utility model discloses not only can the high accuracy measure all electric energy parameter phase current commonly used, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy to and take the input and the output of switching value, can also measure zero sequence current, improve the security.

Description

Multifunctional network instrument with electric leakage detection function
Technical Field
The utility model relates to an electric power system appurtenance especially relates to a multifunctional network instrument who possesses electric leakage detection function.
Background
The power supply is one of the basic guarantees of social production and people's life.
The power system is divided into a power generation system, a power transmission system and a distribution network system. The distribution network system mainly comprises: the power distribution of a 10kV distribution network, production power consumption and 220V life.
With the improvement of the automation level in China, a 10kV distribution network belongs to high-voltage power supply, a comprehensive automation device of the high-voltage power supply plays an important role in power utilization safety, and the high-voltage power supply plays a key role in multi-functional network instruments in multiple aspects such as power utilization quality, energy conservation and power utilization, distributed energy management and the like in industrial production and intelligent application of buildings.
At present, a multifunctional network instrument used in electric power monitoring is mainly used for measuring electric quantity, mainly collects multi-three-phase current, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy, and input and output with switching value, but generally does not have the function of electric leakage detection. In increasingly complex distribution networks, no matter in industrial production, intelligent power utilization of buildings and domestic power utilization of residents, electric leakage is generated, and is one of the main reasons for electric leakage and fire.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the defect that exists among the above-mentioned prior art and not enough, provide one kind not only can the high accuracy measure all electric energy parameter phase current commonly used, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy to and take the input and the output of switching value, can also measure zero sequence current, improve the multifunctional network instrument that possesses the electric leakage detection function of security.
The technical scheme of the utility model: the utility model provides a multifunctional network instrument who possesses leakage detection function, the load simulator comprises an instrument body, the work power supply terminal of setting on the instrument body, a plurality of measurement voltage terminal, a plurality of measurement current terminal, a plurality of measurement zero sequence current terminal, a plurality of communication terminal, a plurality of output terminal and a plurality of input terminal, when the instrument detects the electric leakage, gather instrument monitoring return circuit through zero sequence current transformer, A, B, C three-phase and N zero line in the return circuit pass zero sequence current transformer simultaneously, ensure that the three-phase four-wire passes zero sequence current transformer homophase, there is the leakage current when zero sequence current transformer detects the system, zero sequence current transformer is through inserting measurement zero sequence current terminal, input zero sequence current for the instrument body, through the inside operational amplification circuit of instrument body, show the LED display screen that the value of passing through the instrument body with the.
The utility model discloses not only can the high accuracy measure all electric energy parameter phase current commonly used, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy to and take the input and the output of switching value, can also measure zero sequence current, improve the security.
Preferably, the instrument body is connected with a buzzer, the instrument can give an alarm and buzz when the leakage current exceeds 200mA, and the LED display screen is provided with a leakage current value flashing lamp.
The utility model discloses an instrument possesses the on-the-spot programming function, can set up leakage current early warning, warning and linkage function. When the instrument detects the line leakage current, the leakage current can be displayed, and when the current exceeds 150mA, the functions of early warning, 200mA warning and relay output can be realized. The values of the leakage current early warning and the alarm parameters can be directly set and adjusted through a programming key on the instrument panel.
Preferably, the measurement voltage terminals include terminals No. 1, 2, 3 and 4, the measurement current terminals include terminals No. 5, 6, 7 and 8, the measurement zero-sequence current terminals include terminals No. 9 and 10, the communication terminals include terminals No. 11, 12 and 13, the working power terminals include terminals No. 14 and 15, and the working power supply is AC/DC 220V.
Preferably, the input terminals comprise 17, 18, 19 and 20 terminals, passive dry contact signals can be input, the output terminals comprise 22, 23, 24 and 25 terminals, passive maximum 10A is output, and the meter further comprises 16, 21 and 26 three null terminals.
Preferably, the instrument can be linked with peripheral equipment to collect a switch working state signal in cooperation with the input and output functions of the instrument, meanwhile, the magnitude of leakage current can be detected according to a system, when the leakage current exceeds 150mA, an alarm is given, when the leakage current exceeds 200mA, the instrument outputs a passive signal through a built-in 2-pair relay, the passive signal is matched with a breaker or a switch to trip and remove a fault loop, the action value of the leakage current is 100-400 mA adjustable, the system can be configured to cut off a power supply or provide an alarm for a system upper computer, and an attendant judges whether to remove the fault loop.
The utility model discloses an instrument relay output function needs and the cooperation of secondary control return circuit to cut off electric leakage return circuit. Being equipped with the utility model discloses the system of network deployment (electric power fortune dimension platform, electric power thing networking) is according to the leakage current in the multi-functional instrument real-time detection system, synthesizes system data, provides the leakage data for fortune dimension and carries out insulation analysis. The electric leakage monitoring function is added to the instrument, and similarly, under emergency conditions, a circuit breaker (switch) on site can be controlled on a background (an electric power operation and maintenance platform and an electric power internet of things) through authorization of a supervisor. The circuit breaker and the switch have a remote control function.
The utility model discloses not only can the high accuracy measure all electric energy parameter phase current commonly used, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy to and take the input and the output of switching value, can also measure zero sequence current, improve the security.
Drawings
FIG. 1 is a schematic wiring diagram of the present invention;
fig. 2 is the utility model discloses link the wiring schematic diagram behind the circuit breaker.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1 and 2, a multifunctional network instrument with leakage detection function comprises an instrument body, a working power supply terminal, a plurality of voltage measuring terminals, a plurality of current measuring terminals, a plurality of zero sequence current measuring terminals, a plurality of communication terminals, a plurality of output terminals and a plurality of input terminals, wherein the working power supply terminal, the voltage measuring terminals, the current measuring terminals, the zero sequence current measuring terminals, the communication terminals, the output terminals and the input terminals are arranged on the instrument body, through a zero sequence current transformer acquisition instrument monitoring loop, A, B, C three-phase and N zero lines in the loop simultaneously pass through the zero sequence current transformer to ensure that three-phase four-wire passes through the zero sequence current transformer with the same square phase, when the zero sequence current transformer detects that the system has leakage current, the zero sequence current transformer inputs the zero sequence current to the instrument body by accessing a zero sequence current measuring terminal, through the inside enlarged operational circuit of instrument body, show the leakage current value through the LED display screen of instrument body. The electric leakage current alarm instrument is characterized in that a buzzer is connected to the instrument body, the instrument can alarm and buzz when the electric leakage current exceeds 150mA, and the LED display screen is provided with an electric leakage current value flashing lamp. The measuring voltage terminal comprises terminals 1, 2, 3 and 4, the measuring current terminal comprises terminals 5, 6, 7 and 8, the measuring zero sequence current terminal comprises terminals 9 and 10, the communication terminal comprises terminals 11, 12 and 13, the working power supply terminal comprises terminals 14 and 15, and the working power supply is AC/DC 220V. The input terminals comprise 17, 18, 19 and 20 terminals, passive dry contact signals can be input, the output terminals comprise 22, 23, 24 and 25 terminals, the passive maximum 10A is output, and the meter further comprises 16, 21 and 26 terminals. The input of cooperation instrument, output function, the instrument can link with peripheral equipment, collect switch operating condition signal, can detect the size of electric current to the electric leakage current according to the system simultaneously, report an emergency and ask for help or increased vigilance when the electric current that leaks exceeds 150mA, the instrument is through built-in 2 to relay output passive signal when the electric current that leaks exceeds 200mA, trip with circuit breaker or switch cooperation and remove the fault circuit, the electric current action value of leaking 100 ~ 400mA is adjustable, also can have the configuration of system and cut off the power or provide the warning for the system host computer, judge whether to remove the fault circuit by the personnel on duty.
The utility model discloses a meter body is conventional multifunctional network instrument, and its specific structure and detection principle are conventional technique, and the event does not do the detail.
The utility model discloses not only can the high accuracy measure all electric energy parameter phase current commonly used, three-phase voltage, frequency, power factor, active power, reactive power, active electric energy and reactive electric energy to and take the input and the output of switching value, can also measure zero sequence current, improve the security.

Claims (5)

1. The utility model provides a multifunctional network instrument who possesses electric leakage detection function which characterized in that: the leakage detection instrument comprises an instrument body, a working power supply terminal arranged on the instrument body, a plurality of measurement voltage terminals, a plurality of measurement current terminals, a plurality of measurement zero sequence current terminals, a plurality of communication terminals, a plurality of output terminals and a plurality of input terminals, when the leakage is detected by the instrument, an instrument monitoring loop is collected through a zero sequence current transformer, A, B, C three-phase and N zero lines in the loop simultaneously penetrate through the zero sequence current transformer, the three-phase four-wire is ensured to penetrate through the zero sequence current transformer in the same direction, when the zero sequence current transformer detects that the system has leakage current, the zero sequence current transformer inputs the zero sequence current to the instrument body through the access measurement zero sequence current terminal, an operation circuit is amplified inside the instrument body, and the leakage current value is displayed through an.
2. The multifunctional network instrument with leakage detection function as claimed in claim 1, wherein: the electric leakage current alarm instrument is characterized in that a buzzer is connected to the instrument body, the instrument can alarm and buzz when the electric leakage current exceeds 150mA, and the LED display screen is provided with an electric leakage current value flashing lamp.
3. The multifunctional network instrument with leakage detection function as claimed in claim 1, wherein: the measuring voltage terminal comprises terminals 1, 2, 3 and 4, the measuring current terminal comprises terminals 5, 6, 7 and 8, the measuring zero sequence current terminal comprises terminals 9 and 10, the communication terminal comprises terminals 11, 12 and 13, the working power supply terminal comprises terminals 14 and 15, and the working power supply is AC/DC 220V.
4. The multifunctional network instrument with leakage detection function as claimed in claim 1, wherein: the input terminals comprise terminals 17, 18, 19 and 20, passive dry contact signals can be input, the output terminals comprise terminals 22, 23, 24 and 25, the passive terminals output passive maximum 10A, and the meter further comprises three null terminals 16, 21 and 26.
5. The multifunctional network instrument with leakage detection function as claimed in claim 4, wherein: the input of cooperation instrument, output function, the instrument can link with peripheral equipment, collect switch operating condition signal, can detect the size of electric current to the electric leakage current according to the system simultaneously, report an emergency and ask for help or increased vigilance when the electric current that leaks exceeds 150mA, the instrument is through built-in 2 to relay output passive signal when the electric current that leaks exceeds 200mA, trip with circuit breaker or switch cooperation and remove the fault circuit, the electric current action value of leaking 100 ~ 400mA is adjustable, also can have the configuration of system and cut off the power or provide the warning for the system host computer, judge whether to remove the fault circuit by the personnel on duty.
CN201922169278.2U 2019-12-06 2019-12-06 Multifunctional network instrument with electric leakage detection function Active CN211453908U (en)

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Application Number Priority Date Filing Date Title
CN201922169278.2U CN211453908U (en) 2019-12-06 2019-12-06 Multifunctional network instrument with electric leakage detection function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922169278.2U CN211453908U (en) 2019-12-06 2019-12-06 Multifunctional network instrument with electric leakage detection function

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CN211453908U true CN211453908U (en) 2020-09-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112505584A (en) * 2020-11-27 2021-03-16 重庆龙煜精密铜管有限公司 Grounding leakage fault point positioning system for heating pipe of annealing furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112505584A (en) * 2020-11-27 2021-03-16 重庆龙煜精密铜管有限公司 Grounding leakage fault point positioning system for heating pipe of annealing furnace
CN112505584B (en) * 2020-11-27 2024-01-12 重庆龙煜精密铜管有限公司 Positioning system for earth leakage fault point of heating tube of annealing furnace

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