CN206074794U - The portable power storage load box checked by false wiring of electric energy metering equipment - Google Patents
The portable power storage load box checked by false wiring of electric energy metering equipment Download PDFInfo
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- CN206074794U CN206074794U CN201621094614.1U CN201621094614U CN206074794U CN 206074794 U CN206074794 U CN 206074794U CN 201621094614 U CN201621094614 U CN 201621094614U CN 206074794 U CN206074794 U CN 206074794U
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- capacitor
- load box
- wiring
- air switch
- thermorelay
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Abstract
The portable power storage load box checked by false wiring of electric energy metering equipment, including capacitor, short circuit and overload protection and control loop；Capacitor C presses △ shape wiring；Capacitor and the first air switch QF1, catalyst KM main contacts, reactor X, thermorelay FR main contacts composition main circuit, with the first air switch, thermorelay and reactor are as the short circuit of circuit, overload and suppress dash current protection when closing a floodgate；By the second air switch QF2, catalyst KM auxiliary contact, start button SB2, stop button SB1, thermorelay FR auxiliary contact as the control loop of main circuit, the switching of capacitor is controlled；First air switch, the second air switch, stop button, start button, load box cabinet panel is installed on, other components and parts closings are installed in load box body.This load box can carry out wiring check and analysis to the comprehensive wiring of metering device, and preventing error wiring occurs.
Description
Technical field
This utility model belongs to electric power meter wiring check technical field of tools, particularly for low-voltage electric energy metering
Device false wiring checks the capacitive load case with analysis.
Background technology
Electric power meter wiring correctness is directly connected to the accuracy of metering, is related to user and power supply enterprise
Economic interests.And new clothes user, substantially can not check because of zero load electric current whether metering device wiring is correct in time, fortune
Whether row is normal.Need to carry out first inspection in one month, and portions of client in first inspection also because of zero load electric current, need repeatedly to existing
Field carries out inspection process, and this not only wastes the production cost of power supply enterprise, can't find metering device with the presence or absence of mistake in time
Situations such as mis-wired, electric personnel are met to dress table and cause certain psychological burden.And wiring error is found in first inspection, although it is wrong
The mis-wired time is shorter, but has resulted in metering mistake all the time, causes certain economic loss or shadow to client or power supply enterprise
Ring.
For the client for being configured with low-voltage reactive compensator, it is possible to use switching low-voltage reactive-load compensation capacitor carries out height
For the inspection and analysis of the metering device false wiring of low meter, but for 80kVA and following Electricity customers, due to not configuring low pressure
Reactive power compensator, it is impossible to dress table connect the electric same day can just grasp metering device operation it is whether normal.And commercial type is negative
Case is carried, a secondary load source is typically all simulated, it is impossible to which Inspection and analysis is carried out to current transformer itself and comprehensive wiring,
It is only capable of the error of electric energy meter is checked and analyzed.
The content of the invention
The purpose of this utility model is to solve electric power meter new clothes user because zero load electric current can not be timely
Judge the whether correct problem of wiring, there is provided a kind of that the comprehensive wiring of metering device current transformer, electric energy meter can be carried out
The portable power storage load box that wiring check is occurred with analysis, effective preventing error wiring.
The purpose of this utility model is achieved through the following technical solutions：
The portable power storage load box checked by false wiring of electric energy metering equipment, including the electric capacity as load
Device, short circuit and overload protection and control loop；It is 10kvar for 0.45kV, rated capacity that the capacitor is a rated voltage
～20kvar, the mode of connection press the low voltage three-phase power capacitor C of △ shape wiring；Capacitor and the first air switch QF1, contact
Device KM main contacts, reactor X, thermorelay FR main contacts composition main circuit, with the first air switch QF1, thermorelay FR and
Reactor X as circuit short circuit, overload and suppress close a floodgate when dash current protection；By the second air switch QF2, catalyst
The control loop of KM auxiliary contact, start button SB2, stop button SB1, thermorelay FR auxiliary contact as main circuit is right
The switching of capacitor is controlled；Operation part components and parts the first air switch QF1 and the second air switch QF2, stop button
SB1, start button SB2 are installed on load box cabinet panel, other components and parts capacitor C, catalyst KM, reactor X, hot relay
Device FR closings are installed in load box body.
This utility model is provided with louvre or heat abstractor in the capacitor C installation sites of load box, in thermorelay
FR installation sites are provided with SR.Connecting wire in load box body between each first device is not less than 4mm using cross-sectional area2
Insulation annealed copper wire.
This utility model use low voltage three-phase power capacitor as load, air switch as equipment short-circuit protection,
Reactor shoves protection, thermorelay as capacitor overtemperature protection as limit, by the use of catalyst as control device, Neng Gou
When not using, circuit disconnects automatically, prevents the anti-power transmission of capacitor from causing personnel to get an electric shock.New clothes user's dress table should after the completion of connecing electricity
Load box accesses to metering device low-voltage current mutual inductor rear end or subscribers feeder cabinet outlet switch, capacitive load of closing case electricity
Source and control power supply, after clicking on start button, capacitor comes into operation, and produces a three-phase equilibrium and stable rated current (root
Different rated current are produced according to from different rated capacitor capacity), electric energy metrical is filled using the rated current for producing
The false wiring put checked and analyzed, the generation of effective preventing error wiring.
Description of the drawings
Fig. 1 is capacitive load case elementary diagram；
Fig. 2 is capacitive load case panel layout；
Fig. 3 is capacitive load case and electric power meter wiring schematic diagram；
Fig. 4 is that capacitive load case checks electric energy meter correct wiring phasor diagram.
Specific embodiment
With reference to the accompanying drawings and detailed description this utility model is described in further detail.
The wiring for being illustrated in figure 1 the portable power storage load box checked to false wiring of electric energy metering equipment is former
Reason figure, including load, short circuit and overload protection and control loop；The load, from a rated voltage be 0.45kV,
Rated capacity for 10kvar～20kvar low voltage three-phase power capacitor C as load, carry out wiring by the △ shapes mode of connection.
Main circuit is constituted with the first air switch QF1, catalyst KM main contacts, reactor X, thermorelay FR main contacts, it is empty with first
Air cock QF1 can play the short-circuit protection of circuit as load box total power switch.Capacitor is in input moment phase in theory
When in dash, when line voltage not zero passage, input capacitor has very big inrush phenomenon, therefore, current-limiting reactor in circuit
X with suppress close a floodgate when dash current.Thermorelay FR can be prevented because of capacitor mistake as capacitor is overheated and overload protection
Heat breaks down.And control loop is then pressed by the second air switch QF2, catalyst KM auxiliary contact, start button SB2, stopping
Button SB1, thermorelay FR auxiliary contact are controlled to the switching of capacitor as the control loop of main circuit, one side energy
Enough to carry out frequently switching operation to capacitor, more importantly capacitor itself can store electric charge, when not in use, can
Prevent capacitor discharge powered to switch or binding post, be prevented effectively from operating personnel and send out during mobile device NOR operation
It is raw to get an electric shock.
Capacitive load case panel layout is illustrated in figure 2, by capacitor C, catalyst KM, reactor X, thermorelay
FR closings are installed in load box body, the first air switch QF1, the second air switch QF2, stop button SB1, start button
SB2 is installed on cabinet panel.Operation part is arranged on panel, and electric connection part is placed in casing, it is ensured that case body equipment
Exposed parts safety.Louvre is set in the capacitor C installation sites of load box, is arranged in thermorelay FR installation sites and is resetted
Button, is easy to the radiating of capacitor and the reset operation of thermorelay.When capacitive load case is connected to low-voltage electric energy metering dress
After putting a load side energization, a rated current of a three-phase equilibrium and homeostasis is produced.Each first device in load box body
Between connecting wire, then the rated current according to selected capacitor, is not less than 4mm using cross-sectional area2Insulation annealed copper wire.Electricity
Container payload case power supply junction adopts plug-in type, and power line is because the rated capacitor capacity for selecting is in the specified of 10 to 20kvar
Electric current is usually no more than 30A, is known using wired colour code, and cross-sectional area is not less than 4mm2Annealed copper wire connect as power line and equipment
Ground wire, and outer layer protection is carried out to power line with insulating sheath, during preventing use, insulating barrier is damaged.Power line opposite side with
Low-voltage circuit junction then adopts clamp-type, is made using insulant, it is ensured that insulation safety in operating process at gripper handles
It is reliable.
Capacitive load case and electric power meter wiring schematic diagram are illustrated in figure 3, and the electric same day are connect in dress table, are worked as user
After switchgear house power transmission, on the premise of any user's burden with power is not also put into, capacitive load case is connected to power line
Electric power meter Z low-voltage current mutual inductors rear end or subscribers feeder cabinet outlet switch, capacitive load of closing case main power
One air switch QF1 and the second air switch QF2, after clicking on start button SB2, capacitor C comes into operation, and produces a three-phase
Balance and stable rated current (producing different rated current according to from different rated capacitor capacity), as selected
Rated capacitor capacity is 15kvar, and rated current is 19.2A, and at this moment, the primary side current passed through in metering device is three-phase
The electric current of balance and stable 19.2A, it is possible to use this electric current that capacitor is produced carries out wiring inspection to electric power meter
Look into and analysis.
First, with circuit tester, phase-sequence meter or by checking that electric energy meter magnitude of voltage judges electric energy meter voltage whether normal, phase sequence
It is whether correct；Secondly, whether the rated current for being produced with input capacitive load case judges the current loop of metering device
Normally, if metering no-load voltage ratio is 150/5A, then the secondary current of electric energy meter should be 19.2 ÷ 30=0.64A (because of supply voltage, electric capacity
The impact of device and metering device equal error, current value have certain deviation), check or measure that multifunctional electric energy meter shows two
Primary current value, if the secondary side current value of electric energy meter three-phase is balanced and is close to 0.64A, can determine that as metering device electric current
Loop is normal.If there is current loop has short circuit or open circuit situation, will can differ larger with the load current value that capacitor is produced,
If wherein one phase or line to line fault or open circuit, will appear from three-phase current extremely uneven.
Finally, because the load box for putting into is purely capacitive load, using total power factorAndThis will
Point, calculates reverse reactive power valueThe instantaneous reversely idle work(for showing with multifunctional electric energy meter or measuring
Rate is compared, and judges whether wiring is correct.Or phase place voltammertry angle is directly used, or use three-phase electric energy meter on-site
Tester directly carries out wiring differentiation and verification multifunctional electric energy meter reactive power error and carries out the inspection and analysis of metering device wiring,
And at this time, it may be necessary to it is to be noted that in phasor diagram, be electric current leading voltage oneAngle, andAngle is approximately equal to 90 °, correct wiring
Phasor diagram it is as shown in Figure 4.
This utility model by the use of capacitor as load, with conducts such as air switch, catalyst, reactor, thermorelays
Protection and control, are fabricated to a Portable load box.Dress table connects the electric same day and accesses this utility model in the rear end of metering device,
A three-phase equilibrium and stable primary current are produced, the comprehensive wiring to metering device current transformer, electric energy meter connects
Ray examination and analysis, can effectively prevent the generation of wiring error.
Claims (3)
1. the portable power storage load box checked by pair false wiring of electric energy metering equipment, it is characterised in that include conduct
The capacitor of load, short-circuit and overload protection and control loop；It is 0.45kV, specified appearance that the capacitor is a rated voltage
Measure for 10kvar～20kvar, the mode of connection by △ shape wiring low voltage three-phase power capacitor C；Capacitor is opened with the first air
QF1, catalyst KM main contacts, reactor X, thermorelay FR main contacts composition main circuit are closed, with the first air switch QF1, heat
Relay FR and reactor X as circuit short circuit, overload and suppress close a floodgate when dash current protection；By the second air switch
The control of QF2, catalyst KM auxiliary contact, start button SB2, stop button SB1, thermorelay FR auxiliary contact as main circuit
Loop processed, is controlled to the switching of capacitor；Operation part components and parts the first air switch QF1 and the second air switch QF2,
Stop button SB1, start button SB2 are installed on load box cabinet panel, other components and parts capacitor C, catalyst KM, reactor
X, thermorelay FR closing is installed in load box body.
2. the portable power storage load box checked by false wiring of electric energy metering equipment according to claim 1,
Characterized in that, the capacitor C installation sites in load box are provided with louvre or heat abstractor, in thermorelay FR installation positions
Install and be equipped with SR.
3. the portable power storage load box checked by false wiring of electric energy metering equipment according to claim 1,
Characterized in that, the connecting wire in load box body between each first device is not less than 4mm using cross-sectional area2Insulation annealed copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094614.1U CN206074794U (en) | 2016-09-30 | 2016-09-30 | The portable power storage load box checked by false wiring of electric energy metering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621094614.1U CN206074794U (en) | 2016-09-30 | 2016-09-30 | The portable power storage load box checked by false wiring of electric energy metering equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206074794U true CN206074794U (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621094614.1U Active CN206074794U (en) | 2016-09-30 | 2016-09-30 | The portable power storage load box checked by false wiring of electric energy metering equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
| CN109444801A (en) * | 2018-10-25 | 2019-03-08 | 国网浙江乐清市供电有限公司 | A kind of device being conducive to the carrying of misconnection line detector |
| CN109709457A (en) * | 2019-01-22 | 2019-05-03 | 苏州工业职业技术学院 | A kind of Insulation monitoring and thermal protector reset test device |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
-
2016
- 2016-09-30 CN CN201621094614.1U patent/CN206074794U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107313A (en) * | 2018-01-30 | 2018-06-01 | 国网河南省电力公司平顶山供电公司 | The method that unloaded situation judges connection box of electric energy meter correctness |
| CN109444801A (en) * | 2018-10-25 | 2019-03-08 | 国网浙江乐清市供电有限公司 | A kind of device being conducive to the carrying of misconnection line detector |
| CN109709457A (en) * | 2019-01-22 | 2019-05-03 | 苏州工业职业技术学院 | A kind of Insulation monitoring and thermal protector reset test device |
| CN109709457B (en) * | 2019-01-22 | 2023-12-12 | 苏州工业职业技术学院 | Insulation detection and thermal protector reset testing device |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
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