CN108918995A - A kind of portable three-phase power load monitor - Google Patents
A kind of portable three-phase power load monitor Download PDFInfo
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- CN108918995A CN108918995A CN201810602782.4A CN201810602782A CN108918995A CN 108918995 A CN108918995 A CN 108918995A CN 201810602782 A CN201810602782 A CN 201810602782A CN 108918995 A CN108918995 A CN 108918995A
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- phase
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- power supply
- voltage sampling
- power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Measurement Of Current Or Voltage (AREA)
Abstract
本发明公开了一种便携式三相电力负荷监测仪，包括数显三相多功能电力仪表、电源零线电压取样线、C相电源电压取样线、B相电源电压取样线、A相电源电压取样线、C相电流取样互感器、B相电流取样互感器及A相电流取样互感器；电源零线电压取样线、C相电源电压取样线、B相电源电压取样线和A相电源电压取样线分别连接在数显三相多功能电力仪表的电压取样单元接线端子上，C相电流取样互感器、B相电流取样互感器及A相电流取样互感器分别连接在数显三相多功能电力仪表的电流取样单元接线端子上。本发明携带和使用方便，能就近直接观察和监测到供电系统及用电设备空载、轻载、满载、过载情况和负荷数据。
The invention discloses a portable three-phase power load monitor, which comprises a digital display three-phase multifunctional power meter, a power zero line voltage sampling line, a C-phase power supply voltage sampling line, a B-phase power supply voltage sampling line, and an A-phase power supply voltage sampling line Line, C-phase current sampling transformer, B-phase current sampling transformer and A-phase current sampling transformer; power zero line voltage sampling line, C-phase power supply voltage sampling line, B-phase power supply voltage sampling line and A-phase power supply voltage sampling line They are respectively connected to the voltage sampling unit terminals of the digital display three-phase multifunctional power meter, and the C-phase current sampling transformer, B-phase current sampling transformer and A-phase current sampling transformer are respectively connected to the digital display three-phase multifunctional power meter on the terminal block of the current sampling unit. The invention is convenient to carry and use, and can directly observe and monitor the no-load, light-load, full-load, overload conditions and load data of the power supply system and electric equipment nearby.
Description
Technical field
The invention belongs to power supply system electric load monitoring technical fields, and it is negative to be specifically related to a kind of portable three-phase power
Lotus monitor.
Background technique
In actual operation, generally require the zero load to a power supply system and all electrical equipments of power supply system, underloading,
The electricity datas such as fully loaded, overload measure, and load measurement instrument in the market has plenty of fixed installation on the transformer, has
It is only applicable to monitoring high-tension line load condition, has plenty of hand-held pincerlike instrument.
For example, the Chinese patent of Publication No. CN201830032U discloses a kind of transformer load monitoring instrument, for supervising
The load condition of transformer is surveyed, for maintenance transformer and provides foundation to the adjustment of electric load.For energy conservation service mechanism etc.
Worker, often wants mobile working, monitoring electricity unit by each in the power supply system and power supply system of transformer-supplied with
The electrical parameters such as electric current, voltage, mains frequency, apparent energy, active power, the reactive power of electric equipment, it is clear that this fixed peace
At this moment the transformer load monitoring instrument of dress is not suitable for.
For another example, the Chinese patent of Publication No. CN206906463U discloses a kind of high voltage load monitor, and the high pressure is negative
Lotus monitor is mainly used for monitoring the load condition of high-tension line, is not suitable for three-phase power load monitoring.
The Chinese patent of hand-held pincer instrument such as Publication No. CN203732599U provides a kind of energy pincerlike meter, the pincer
Table can only measure the parameters such as voltage, electric current, resistance due to only one split core type current transformer, when measuring three-phase load
Summation is manually calculated again after measuring the data of each phase respectively, and when due to power supply system or equipment work, electrical parameter is all
State variation, the especially unstable equipment of load, electrical parameter variation range is bigger, therefore using asking again after split-phase independent measurement
With, between phase and phase measure when have a time difference, the data after summation are unable to the actual conditions of accurate response machine utilization.
In order to easy to carry, the actual load situation of equipment or system, Publication No. can be accurately measured
The Chinese patent of CN204389614U discloses a kind of portable multi-function energy efficiency monitor, which is capable of measuring electricity and non-
Electrical parameter, such as flow, temperature, humidity, pressure thermal technology amount and phase/line voltage/electric current, power factor, fundamental power, harmonic wave
The electrical parameters such as power.But structure is complicated for the monitor, working service maintenance trouble, and cost is high；It is wider to be related to professional domain simultaneously,
It is more demanding to operator, it is desirable that user is multi-disciplinary inter-trade inter-disciplinary talent.
Summary of the invention
To solve the above problems, the present invention provides a kind of portable three-phase power load monitor, which can be into
Row production scene separate unit electrical equipment and the monitoring of power supply system actual load, carry, are easy to use, accuracy is high.
The present invention is achieved by following technical solution.
A kind of portable three-phase power load monitor, including digital display three-phase multifunctional electric instrument, zero-power line voltage
Sample line, C phase supply voltage sample line, B phase supply voltage sample line, A phase supply voltage sample line, C phase current sample mutual inductance
Device, B phase current sampling mutual inductor and A phase current sampling mutual inductor；
The zero-power line voltage sampling line connects at the voltage sampling unit connection end of digital display three-phase multifunctional electric instrument
SonOn, C phase supply voltage sample line connects the voltage sampling unit connection terminal in digital display three-phase multifunctional electric instrument
On, B phase supply voltage sample line connects the voltage sampling unit connection terminal in digital display three-phase multifunctional electric instrumentOn, A phase
Supply voltage sample line connects the voltage sampling unit connection terminal in digital display three-phase multifunctional electric instrumentOn；
The secondary side terminal K of the C phase current sampling mutual inductor1With the current sampling of digital display three-phase multifunctional electric instrument
Unit connection terminalElectrical connection, the secondary side terminal K of C phase current sampling mutual inductor2With digital display three-phase multifunctional electric instrument
Current sampling unit connection terminalElectrical connection；The secondary side terminal K of B phase current sampling mutual inductor1With the more function of digital display three-phase
The current sampling unit connection terminal of energy electric instrumentElectrical connection, the secondary side terminal K of B phase current sampling mutual inductor2With number
The current sampling unit connection terminal of aobvious three-phase multifunctional electric instrumentElectrical connection；The secondary side of A phase current sampling mutual inductor
Terminal K1With the current sampling unit connection terminal of digital display three-phase multifunctional electric instrumentElectrical connection, A phase current sample mutual inductance
The secondary side terminal K of device2With the current sampling unit connection terminal of digital display three-phase multifunctional electric instrumentElectrical connection.
Current sampling unit connection terminal on the digital display three-phase multifunctional electric instrumentCurrent sampling unit connection
TerminalCurrent sampling unit connection terminalIt is electrically connected to ground after connecting into a little with power supply system.
1. and working power working power connecting terminal is also respectively provided on the digital display three-phase multifunctional electric instrument
Connecting terminal is 2., wherein working power connecting terminal 1. with voltage sampling unit connection terminalElectrical connection, working power wiring
Terminal 2. with voltage sampling unit connection terminalElectrical connection.
2. the working power connecting terminal passes sequentially through power switch and work insurance and voltage sampling unit connection end
SonElectrical connection.
C phase power supply indicator, power supply are provided between the zero-power line voltage sampling line and C phase supply voltage sample line
Be provided with B phase power supply indicator between neutral voltage sample line and B phase supply voltage sample line, zero-power line voltage sampling line with
A phase power supply indicator is provided between A phase supply voltage sample line.
The monitor further includes cabinet, and the cabinet is made into an instrument box structure, and instrument is provided in instrument box
Installing zone and storage area.
The digital display three-phase multifunctional electric instrument is mounted on instrument installing zone, zero-power line voltage sampling line, C phase power supply
Voltage sampling line, B phase supply voltage sample line, A phase supply voltage sample line, C phase current sampling mutual inductor, the sampling of B phase current
Mutual inductor and A phase current sampling mutual inductor and digital display three-phase multifunctional electric instrument respective terminal collect after connecting and are put into storage
Area.
The beneficial effects of the invention are as follows：
Compared with prior art, the configuration of the present invention is simple, low cost is easy to carry, and accuracy class is high, can reach 0.5 grade；
Applicability is good：It can be used for carrying out In situ Measurement to big equipment, skinny device, single-phase equipment, three-phase equipment；Range ability is extensive, can
1KW or less and MW grades of equipment or system are measured.It is easy to use, when in use, the terminal box of motor or equipment is opened,
Voltage sampling line connects on motor three-phase terminal plate, three open type current transformers, set be attached on three firewires, energy and
When measure various electrical parameters.It does not need to power off when measurement, not affect the normal production, can observe that equipment is unloaded nearby, be lightly loaded,
Fully loaded, the overload condition of production, and unloaded equipment, underloading, fully loaded, overload electric current, voltage, frequency, power can be accurately measured
The electrical parameters such as factor, active power, reactive power, apparent energy, parameter intuitive display do not need to convert again, common skill
Art personnel can skillfully use.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure：1- working power switch, the insurance of 2- working power, 3-C phase power supply indicator, 4-B phase power supply indicator, 5-
A phase power supply indicator, 6- zero-power line voltage sampling line, 7-C phase supply voltage sample line, 8-B phase supply voltage sample line, 9-
A phase supply voltage sample line, 10-C phase current sampling mutual inductor, 11-B phase current sampling mutual inductor, the sampling of 12-A phase current are mutual
Sensor, 13- digital display three-phase multifunctional electric instrument.
Specific embodiment
Technical solution of the present invention is further described with reference to the accompanying drawing, but claimed range is not limited to institute
It states.
As shown in Figure 1, a kind of portable three-phase power load monitor of the present invention, including digital display three-phase multifunctional
Electric instrument 13, zero-power line voltage sampling line 6, C phase supply voltage sample line 7, B phase supply voltage sample line 8, A phase power supply
Voltage sampling line 9, C phase current sampling mutual inductor 10, B phase current sampling mutual inductor 11 and A phase current sampling mutual inductor 12；
The zero-power line voltage sampling line 6 connects the voltage sampling unit connection in digital display three-phase multifunctional electric instrument 13
TerminalOn, C phase supply voltage sample line 7 connects at the voltage sampling unit connection end of digital display three-phase multifunctional electric instrument 13
SonOn, B phase supply voltage sample line 8 connects the voltage sampling unit connection terminal in digital display three-phase multifunctional electric instrument 13On, A phase supply voltage sample line 9 connects the voltage sampling unit connection terminal in digital display three-phase multifunctional electric instrument 13
On；
The secondary side terminal K of the C phase current sampling mutual inductor 101With the electric current of digital display three-phase multifunctional electric instrument 13
Sampling unit connecting terminalElectrical connection, the secondary side terminal K of C phase current sampling mutual inductor 102With digital display three-phase multifunctional electricity
The current sampling unit connection terminal of power instrument 13Electrical connection；The secondary side terminal K of B phase current sampling mutual inductor 111With number
The current sampling unit connection terminal of aobvious three-phase multifunctional electric instrument 13Electrical connection, the two of B phase current sampling mutual inductor 11
Secondary side terminal K2With the current sampling unit connection terminal of digital display three-phase multifunctional electric instrument 13Electrical connection；A phase current takes
The secondary side terminal K of sample mutual inductor 121With the current sampling unit connection terminal of digital display three-phase multifunctional electric instrument 13Electricity
Connection, the secondary side terminal K of A phase current sampling mutual inductor 122With the current sampling list of digital display three-phase multifunctional electric instrument 13
First connecting terminalElectrical connection.The voltage sampling unit connection terminalEffect be to give digital display three-phase multifunctional electricity
Power instrument 13 provides voltage signal；Current sampling unit connection terminalEffect be to give digital display three-phase multifunctional electric power
Instrument 13 provides current signal.
Current sampling unit connection terminal on the digital display three-phase multifunctional electric instrument 13Current sampling unit
Connecting terminalCurrent sampling unit connection terminalIt is electrically connected to ground after connecting into a little with power supply system.
It is 1. electric with work that working power connecting terminal is also respectively provided on the digital display three-phase multifunctional electric instrument 13
Source connecting terminal is 2., wherein working power connecting terminal 1. with voltage sampling unit connection terminalElectrical connection, working power
Connecting terminal 2. with voltage sampling unit connection terminalElectrical connection.Working power connecting terminal 1. with working power terminals
The effect of son 2. is to provide the work exchange power supply of AC~220V to digital display three-phase multifunctional electric instrument 13.The working power
2. connecting terminal passes sequentially through power switch 1 and work insurance 2 and voltage sampling unit connection terminalElectrical connection.Fig. 1 middle-end
Son 3. -10. be spare connecting terminal.
It is provided with C phase power supply indicator 3 between the zero-power line voltage sampling line 6 and C phase supply voltage sample line 7,
B phase power supply indicator 4, zero-power line voltage are provided between zero-power line voltage sampling line 6 and B phase supply voltage sample line 8
A phase power supply indicator 5 is provided between sample line 6 and A phase supply voltage sample line 9.
Production scene separate unit electrical equipment (a such as computer, an electromagnetic oven, a water pump are being carried out using the present invention
Deng) or power supply system actual load monitor when, directly by zero-power line voltage sampling line 6 and electrical equipment or power supply system zero curve
Connection；C phase supply voltage sample line 7 is connected with C phase firewire；B phase supply voltage sample line 8 is connected with B phase firewire；By A
Phase supply voltage sample line 9 is connected with A phase firewire.When in use, it is connect respectively by above-mentioned 4 voltage sampling lines in load measurement
On the three-phase firewire and zero curve of point, voltage sampling is carried out to electrical equipment or power supply system；The C phase current sampling mutual inductor
10, B phase current sampling mutual inductor 11, A phase current sampling mutual inductor 12 are all made of open-core transformer, convenient for in-site installation to three-phase
Current sampling is carried out on power line.Above-mentioned power supply system refers to the transformer-supplied by a transformer or several parallel runnings
Several electrical equipments constitute one set.
To be easy to carry, the monitor further includes cabinet, and the cabinet is made into an instrument box structure, in instrument box
It is provided with instrument installing zone and storage area.In assembling, zero-power line voltage sampling line 6, the sampling of C phase supply voltage will be connected
Line 7, B phase supply voltage sample line 8, A phase supply voltage sample line 9, C phase current sampling mutual inductor 10, B phase current sample mutual inductance
Device 11 and A phase current sampling mutual inductor 12, digital display three-phase multifunctional electric instrument 13 are fixed on the installing zone of instrument box, electricity
Source neutral voltage sample line 6, C phase supply voltage sample line 7, B phase supply voltage sample line 8, A phase supply voltage sample line 9, C
Phase current sampling mutual inductor 10, B phase current sampling mutual inductor 11, A phase current sampling mutual inductor 12 and connecting wire collection are put into
Then storage area shuts the lid of instrument box, and lid is locked.When in use, lid is opened, by four voltage samplings
Line and three current sampling mutual inductors are taken out out of cabinet, and three open-core transformer in-site installations are enterprising to three-phase power line
Row current sampling, four voltage sampling lines are connect respectively on the three-phase firewire and zero curve of load measurement point, are carried out voltage sampling, are made
Used time voltage sampling and current sampling must be with corresponding, and that is A phase voltage sample line must be with A phase current mutual inductor pair
It answers, B phase voltage sample line must be corresponding with B phase current mutual inductor, and C phase voltage sample line must be corresponding with C phase current mutual inductor.
The cabinet is cuboid or cube structure, and cabinet length is 32-38cm, and width 22-28cm is highly
18-22cm。
Preferred box sizes are 35*25*20cm or so in the technical program, and handle is provided on cabinet lid, convenient
It carries.
The configuration of the present invention is simple has a single function, and when use does not need complicated setting, and opening current transformer set is attached to
On the firewire of three phase mains, four voltage sampling lines are coupled on three-phase firewire and zero curve, pay attention to open-core transformer and (electricity
Press sample line) line must be every corresponding, that is, A phase voltage sample line and A phase open-core transformer are necessarily mounted at same root fire
On line, B, C phase similarly, turn on the power switch after having connect line, can read required three-phase line voltage/electric current, power supply frequency
The electrical parameter of the needs such as rate, power factor, active power, reactive power, apparent energy can directly supervise in low-voltage power supply system
The actual load of every electrical equipment is surveyed, can also be used in the actual load of high-tension apparatus secondary side indirect monitoring high-tension apparatus
Way is extensively.
Measurement accuracy of the present invention can reach 0.5 grade, the concept of 0.5 class precision be measurement result error exact value ±
Within 0.5%, the accuracy class of general pointer-type current voltmeter is 5 grades, that is, ± 5%.And the present invention is by using mutual
Sensor is combined with digital display three-phase power instrument；Its accuracy class is by transformer precision grade and digital display three-phase power accuracy of instrument
Grade determines, since transformer precision grade and digital display three-phase power accuracy of instrument grade all reach 0.5 grade, so that this hair
The bright load monitor precision reaches 0.5 grade, greatly improves monitor accuracy class.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602782.4A CN108918995A (en) | 2018-06-12 | 2018-06-12 | A kind of portable three-phase power load monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602782.4A CN108918995A (en) | 2018-06-12 | 2018-06-12 | A kind of portable three-phase power load monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108918995A true CN108918995A (en) | 2018-11-30 |
Family
ID=64420452
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810602782.4A Pending CN108918995A (en) | 2018-06-12 | 2018-06-12 | A kind of portable three-phase power load monitor |
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| CN207215883U (en) * | 2017-09-01 | 2018-04-10 | 惠州市德赛西威汽车电子股份有限公司 | A kind of current detection circuit based on current transformer |
| CN208568921U (en) * | 2018-06-12 | 2019-03-01 | 六盘水金星机电设备有限公司 | A kind of portable three-phase power load monitor |
-
2018
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Application publication date: 20181130 |