CN207601164U - Electric safety system residual current monitoring module - Google Patents
Electric safety system residual current monitoring module Download PDFInfo
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- CN207601164U CN207601164U CN201721870084.XU CN201721870084U CN207601164U CN 207601164 U CN207601164 U CN 207601164U CN 201721870084 U CN201721870084 U CN 201721870084U CN 207601164 U CN207601164 U CN 207601164U
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Abstract
The utility model discloses a kind of electric safety system residual current monitoring modules, including MCU control circuit, tension measuring circuit, storage circuit, residual current measuring circuit, On-off signal output circuit and RS485 communicating circuits, MCU control circuit is connect with tension measuring circuit, storage circuit, residual current measuring circuit, On-off signal output circuit and RS485 communicating circuits；The residual current measuring circuit is made of plate grade termination power, current signal conditioning circuit, filter circuit and the Differential input circuit of tetra- line current signals of A/B/C/N, the tension measuring circuit is made of voltage transformer isolation circuit, current-to-voltage converting circuit and filtering input circuit, and the On-off signal output circuit is made of control signal acquisition terminal, optical coupling isolation circuit and imput output circuit.The utility model can directly measure the parameters such as three-phase electricity flow valuve, residual current value and voltage, easy to use so as to be installed in lasting galvanization without external secondary mutual inductor again.
Description
Technical field
The utility model is related to a kind of electric quantity collector, specifically a kind of electric safety system residual current monitoring mould
Block.
Background technology
With the development of society, the raising of living standards of the people, various power devices and electricity consumption gradually rise, and thus draw
Electricity gas fire is also more and more, and wherein since device aging, wire insulation aging cause the ratio of accident also more next
It is bigger.By detecting each phase (containing zero phase) current phasor of distribution line in power distribution cabinet and the size of residual current, it can be determined that
The Grounding of distribution line, so as to reduce physical electrical shock fire protection accident, electrical fire and electric device damage accident.
Existing residual current measurement module is required to three-phase and the neutral conductor passing through zero sequence transformer, then calculate
Go out residual current, but since zero sequence transformer need to power off installation, and be to need persistently to lead to for hospital and some processing enterprises
Electricity, so as to complete power-off installation, residual current situation can not be acquired by eventually leading to.
Invention content
In view of the above-mentioned problems of the prior art, the utility model provides a kind of electric safety system residual current monitoring
Signal is accessed this module by module in distribution line by primary current mutual inductor, can directly measure three-phase electricity flow valuve and
Residual current value, and the parameters such as voltage, power and harmonic wave are can measure, without external secondary mutual inductor again, so as to persistently lead to
It is installed in electric process, it is easy to use.
To achieve these goals, the technical solution adopted in the utility model is：This kind of electric safety system residual current
Monitoring module, it is defeated including MCU control circuit, tension measuring circuit, storage circuit, residual current measuring circuit, On-off signal
Go out circuit and RS485 communicating circuits, MCU control circuit and tension measuring circuit, residual current measuring circuit, are opened storage circuit
Pass amount imput output circuit is connected with RS485 communicating circuits；
The residual current measuring circuit is improved by the plate grade termination powers of tetra- line current signals of A/B/C/N, current signal
Circuit, filter circuit and Differential input circuit composition, plate grade termination power and the current signal tune of tetra- line current signals of A/B/C/N
Circuit connection is managed, current signal conditioning circuit is connect with filter circuit, and filter circuit is connect with Differential input circuit；
The tension measuring circuit is by voltage transformer isolation circuit, current-to-voltage converting circuit and filtering input circuit group
Into voltage transformer isolation circuit is connect with current-to-voltage converting circuit, and current-to-voltage converting circuit connects with filtering input circuit
It connects；
The On-off signal output circuit is by control signal acquisition terminal, optical coupling isolation circuit and imput output circuit group
Into control signal acquisition terminal is connect with optical coupling isolation circuit, and optical coupling isolation circuit is connect with imput output circuit.
Further, 5A/5mA current transformers are equipped in the plate grade termination power of the tetra- line current signals of A/B/C/N.
Further, the control chip that the MCU control circuit uses is STM32F407 processing chip.
Compared with prior art, the utility model is using MCU control circuit, tension measuring circuit, storage circuit, remaining electricity
The mode that flow measurement circuitry, On-off signal output circuit and RS485 communicating circuits are combined, wherein residual current measuring circuit
The 5A/5mA current transformers of setting can replace existing remaining capacity harvester after a mutual inductor of access distribution line
It also needs to access secondary mutual inductor, the utility model only needs a mutual inductor in distribution line, you can directly acquisition is matched in real time
The three-phase voltage of electric line, electric current, residual current instantaneous value, then obtain active/reactive power, electricity through MCU control circuit
The parameters of electric power such as energy, power factor, harmonic current；And three-phase voltage that storage circuit real-time storage acquires, electric current can be passed through
Wave data, so that the laggard line number that breaks down is it is investigated that see analysis；Then touch screen can be connected by RS485 communicating circuits to carry out
Check or connection management machine after data are uploaded to platform, make monitoring center obtain real-time, accurate operation of power networks data and
Operation of power networks state, and carry out corresponding control operation.Since the utility model is without zero sequence transformer is needed guiding through, solves scene
Phase line and zero curve distance can not far install zero sequence transformer and the problem of the installing current transformer that cannot have a power failure, so as to hold
It is installed in continuous galvanization, facilitates the use in each place.
Description of the drawings
Fig. 1 is the electric functional block diagram of the utility model；
Fig. 2 is the circuit diagram of tension measuring circuit in the utility model；
Fig. 3 is the electric functional block diagram of residual current measuring circuit in the utility model；
Fig. 4 is the circuit diagram of residual current measuring circuit in the utility model.
Specific embodiment
The utility model is described in further detail below.
As shown in Figures 1 to 4, the utility model includes MCU control circuit, tension measuring circuit, storage circuit, remaining electricity
Flow measurement circuitry, On-off signal output circuit and RS485 communicating circuits, MCU control circuit and tension measuring circuit, storage electricity
Road, residual current measuring circuit, On-off signal output circuit are connected with RS485 communicating circuits；
The residual current measuring circuit is improved by the plate grade termination powers of tetra- line current signals of A/B/C/N, current signal
Circuit, filter circuit and Differential input circuit composition, plate grade termination power and the current signal tune of tetra- line current signals of A/B/C/N
Circuit connection is managed, current signal conditioning circuit is connect with filter circuit, and filter circuit is connect with Differential input circuit；
The tension measuring circuit is by voltage transformer isolation circuit, current-to-voltage converting circuit and filtering input circuit group
Into voltage transformer isolation circuit is connect with current-to-voltage converting circuit, and current-to-voltage converting circuit connects with filtering input circuit
It connects；
The On-off signal output circuit is by control signal acquisition terminal, optical coupling isolation circuit and imput output circuit group
Into control signal acquisition terminal is connect with optical coupling isolation circuit, and optical coupling isolation circuit is connect with imput output circuit.
Further, 5A/5mA current transformers are equipped in the plate grade termination power of the tetra- line current signals of A/B/C/N.
Further, the control chip that the MCU control circuit uses is STM32F407 processing chip.
The various pieces circuit of above-mentioned composition the utility model is known in the art circuit, and individually circuit all may be used
Encapsulation finished product is directly obtained from the market.
At a mutual inductor of the utility model access controller switching equipment, the measurement of residual current：Residual current signal leads to
The plate grade termination power for crossing tetra- line current signals of A/B/C/N carries out signal coupling, the 5A/5mA Current Mutual Inductances then carried through it
After device carries out mutual inductance, passed to after the respective action of current signal conditioning circuit, filter circuit and Differential input circuit successively
MCU control circuit；The measurement of voltage：High-voltage AC signal accesses precision current type voltage transformer after terminal, current-limiting resistance,
After isolation using voltage conversion match circuit, filtering input circuit be sent into MCU circuits, final MCU control circuit obtain it is active/
The parameters of electric power such as reactive power, electric energy, power factor, voltage, harmonic current；And can be acquired by storage circuit real-time storage
The Wave data of three-phase voltage, electric current, so that the laggard line number that breaks down is it is investigated that see analysis；Then pass through RS485 communicating circuits
Can connect touch screen checked or connection management machine after data are uploaded to platform.
Claims (3)
1. a kind of electric safety system residual current monitoring module, which is characterized in that including MCU control circuit, voltage measurement electricity
Road, storage circuit, residual current measuring circuit, On-off signal output circuit and RS485 communicating circuits, MCU control circuit with
Tension measuring circuit, storage circuit, residual current measuring circuit, On-off signal output circuit are connected with RS485 communicating circuits；
The residual current measuring circuit by the plate grade termination power of tetra- line current signals of A/B/C/N, current signal conditioning circuit,
Filter circuit and Differential input circuit composition, plate grade termination power and the current signal conditioning electricity of tetra- line current signals of A/B/C/N
Road connects, and current signal conditioning circuit is connect with filter circuit, and filter circuit is connect with Differential input circuit；
The tension measuring circuit is made of voltage transformer isolation circuit, current-to-voltage converting circuit and filtering input circuit,
Voltage transformer isolation circuit is connect with current-to-voltage converting circuit, and current-to-voltage converting circuit is connect with filtering input circuit；
The On-off signal output circuit is made of control signal acquisition terminal, optical coupling isolation circuit and imput output circuit, control
Signal acquisition terminal processed is connect with optical coupling isolation circuit, and optical coupling isolation circuit is connect with imput output circuit.
A kind of 2. electric safety system residual current monitoring module according to claim 1, which is characterized in that the A/B/
5A/5mA current transformers are equipped in the plate grade termination power of tetra- line current signals of C/N.
A kind of 3. electric safety system residual current monitoring module according to claim 1, which is characterized in that the MCU
The control chip that control circuit uses is STM32F407 processing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721870084.XU CN207601164U (en) | 2017-12-28 | 2017-12-28 | Electric safety system residual current monitoring module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721870084.XU CN207601164U (en) | 2017-12-28 | 2017-12-28 | Electric safety system residual current monitoring module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207601164U true CN207601164U (en) | 2018-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721870084.XU Active CN207601164U (en) | 2017-12-28 | 2017-12-28 | Electric safety system residual current monitoring module |
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| Country | Link |
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| CN (1) | CN207601164U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350476A (en) * | 2019-07-23 | 2019-10-18 | 天地（常州）自动化股份有限公司 | The selective earth leakage protection circuit and earth leakage protecting method of the low damage conditioning of signal |
| CN113721070A (en) * | 2020-05-26 | 2021-11-30 | 天津首瑞智能电气有限公司 | Residual current detection device and residual current detection method |
| CN114062772A (en) * | 2020-08-07 | 2022-02-18 | 天津首瑞智能电气有限公司 | Residual current measuring circuit |
-
2017
- 2017-12-28 CN CN201721870084.XU patent/CN207601164U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350476A (en) * | 2019-07-23 | 2019-10-18 | 天地（常州）自动化股份有限公司 | The selective earth leakage protection circuit and earth leakage protecting method of the low damage conditioning of signal |
| CN110350476B (en) * | 2019-07-23 | 2024-02-09 | 天地（常州）自动化股份有限公司 | Selective leakage protection circuit and leakage protection method for low-loss signal conditioning |
| CN113721070A (en) * | 2020-05-26 | 2021-11-30 | 天津首瑞智能电气有限公司 | Residual current detection device and residual current detection method |
| CN113721070B (en) * | 2020-05-26 | 2024-03-29 | 天津首瑞智能电气有限公司 | Residual current detection device and residual current detection method |
| CN114062772A (en) * | 2020-08-07 | 2022-02-18 | 天津首瑞智能电气有限公司 | Residual current measuring circuit |
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