CN110068731A - A kind of electric bridge comparison expression switch cabinet phasing device - Google Patents
A kind of electric bridge comparison expression switch cabinet phasing device Download PDFInfo
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- CN110068731A CN110068731A CN201910266738.5A CN201910266738A CN110068731A CN 110068731 A CN110068731 A CN 110068731A CN 201910266738 A CN201910266738 A CN 201910266738A CN 110068731 A CN110068731 A CN 110068731A
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- Prior art keywords
- resistive
- resistance
- arm
- mounting plate
- switch cabinet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller, or for passing one of the input signals as output signal
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
A kind of electric bridge comparison expression switch cabinet phasing device proposed by the present invention, comprising: vehicle frame, six resistive arms and three current potential tables；Six resistive arms are installed on vehicle frame, and six resistive arms respectively correspond A, B, C three-phase of the first power supply and second source to nuclear phase；Each resistive arm is composed in series by a measurement resistance and a divider resistance, and divider resistance is less than measurement resistance；The tie point of resistance and divider resistance is measured as nuclear phase voltage output end；Corresponding first power supply and two resistive arms of the same phase of second source partner and compare arm；Three current potential tables arm compared with three pairs corresponds, and two input terminals of each current potential table are separately connected the nuclear phase voltage output end of two resistive arms in corresponding relatively arm.In the present invention, resistive arm and current potential table are installed on vehicle frame, and only vehicle frame need to be pushed into switchgear, just can be carried out nuclear phase test, safe operation is simple, significantly reduces security risk and saves manpower.
Description
Technical field
The present invention relates to electric equipment test detection technique fields more particularly to a kind of electric bridge comparison expression switch cabinet phasing to fill
It sets.
Background technique
With China's expanding economy, while either enterprise or resident increase electricity needs, to electric energy
Quality and power supply reliability propose more strict requirements, and " hand in hand " ring network power supply mode is that raising power supply reliability is most straight
Connect effective method.In ring network power supply operation, existing outstanding problem, which is exactly that two-way power phase phase is inconsistent, to be carried out side by side
When operation, cause phase fault, causes personal injury, grid equipment damage.Therefore substation newly-built, after reorganization and expansion and transmission of electricity
Route, and being finished in line maintenance, to before user's power transmission, it is necessary to carry out nuclear phase test, with ensure transmission line of electricity phase sequence with
The required phase sequence of user load is consistent.
Currently, being wireless nuclear phase side one is wired nuclear phase mode, another kind there are two types of domestic common nuclear phase modes
Formula.
(1) wired nuclear phase mode: needing more people to carry out when nuclear phase, two of them people opens simultaneously switch with link rod respectively
Cabinet closes isolation baffle plate, and maintains, then wireless nuclear phase stick is protruded into switch cabinet static contact by two people and carries out nuclear phase.In this way
Operating process in, link rod exist slip danger, operator with link rod open closing isolation baffle plate when, once one
Side slips, and people is possible to enter in cabinet, then, closes isolation baffle plate one and opens a closing, operator and electrification are set
Standby distance will be less than safe distance, cause personal injury.If firmly uneven, closing isolation baffle plate can be made to close suddenly,
Wireless nuclear phase stick is blocked, nuclear phase stick is caused to be broken, if nuclear phase probe breaks in static contact, scope of power outage is will be enlarged by, influences to supply
Electric reliability.
Wireless nuclear phase mode: wireless phasing tester is a kind of instrument for realizing the detection of high-voltage electric power circuit phase wireless.Mainly
High-tension line phase is realized by sending and receiving two devices using the phase information of wireless electric theory acquisition power circuit
The radio detection of position.Sending device emits after the mains voltage signal of acquisition is handled and modulated after working normally, and receives
Device is believed after demodulating the mains voltage signal of the sending device received with the collected electric network voltage of reception device itself
Number compared in real time, its phase difference value can be measured.Phase difference is same phase less than 10 °, and it is out-phase that phase difference value, which is greater than 30 °,.
Wireless phase checking device is chiefly used in the nuclear phase of high-tension line, has the following problems when being used for switch cabinet phasing: due in switchgear
Narrow space, and there is closing isolation baffle plate, it needs when acquisition to open closing isolation baffle plate, it is cumbersome, due to switchgear
Interior three-phase bus electromagnetic interference signal in close and switchgear is more, might have deviation, test knot when acquiring signal
Fruit inaccuracy.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of electric bridge comparison expression switch cabinet phasing devices.
A kind of electric bridge comparison expression switch cabinet phasing device proposed by the present invention, comprising: vehicle frame, six resistive arms and three electricity
Position table；
Six resistive arms are installed on vehicle frame, and six resistive arms respectively correspond the first power supply and second source to nuclear phase
A, B, C three-phase；Each resistive arm is composed in series by a measurement resistance and a divider resistance, and divider resistance, which is less than, to be surveyed
Measure resistance；Resistive arm passes through measurement resistance and connects with corresponding power phase, and is grounded by divider resistance, measures resistance and divides
The tie point of piezoresistance is as nuclear phase voltage output end；
Corresponding first power supply and two resistive arms of the same phase of second source partner and compare arm, and each pair is compared arm
In, it is equal with the ratio of divider resistance that resistance is measured on two resistive arms；
Three current potential tables arm compared with three pairs corresponds, and two input terminals of each current potential table are separately connected corresponding relatively arm
In two resistive arms nuclear phase voltage output end.
Preferably, on each resistive arm, the ratio for measuring resistance and divider resistance is greater than or equal to 100.
Preferably, compare in arm for each pair, the measurement resistance on two resistive arms is identical, point on two resistive arms
Piezoresistance resistance value is identical.
Preferably, on each resistive arm, the ratio for measuring resistance and divider resistance is equal.
Preferably, the measurement resistance of each resistive arm is identical, and the divider resistance resistance value of each resistive arm is identical.
Preferably, vehicle frame includes bottom plate, the first mounting plate and the second mounting plate；First mounting plate and the second mounting plate are mutual
It is vertically mounted on bottom plate in parallel, what six resistive arms were parallel to each other is vertically mounted on the first mounting plate and is located at the first peace
Side of the loading board far from the second mounting plate, three current potential tables are installed on the second mounting plate and are located at the second mounting plate far from the
The side of one mounting plate；Vehicle frame is pushed into the state of switchgear, and each resistive arm passes through measurement resistance respectively and exists with corresponding setting
Power contact electrical connection in switchgear.
Preferably, the first mounting plate and the second mounting plate cooperation bottom plate form F type structure, and the first mounting plate is located at bottom plate
Middle part.
Preferably, six resistive arms are in rectangular arranged on the first mounting plate.
Preferably, and six resistive arms are fixed by screws on the first mounting plate.
Preferably, opposite sides is also equipped with the support plate being parallel to each other on bottom plate, and support plate is clamped in the first mounting plate
And second between mounting plate.
A kind of electric bridge comparison expression switch cabinet phasing device proposed by the present invention, using the principle of electric resistance partial pressure, respectively
One power end and second source end take the in-phase voltage value an of scaled down, pass through the parallel connection one between two divider resistances
A current potential table, then judged by observing the deflection of pointer the first power supply and second source whether same-phase: if throw of pointer,
Then prove two power supply difference phases, if pointer does not deflect, two power supply same-phases.
In the present invention, resistive arm and current potential table are installed on vehicle frame, and only vehicle frame need to be pushed into switchgear, just can be carried out
Nuclear phase test, safe operation is simple, significantly reduces security risk and saves manpower.
A kind of electric bridge comparison expression switch cabinet phasing device proposed by the present invention is a kind of switch cabinet electricity detection dress based on trolley
It sets, solves the problems, such as that working space is smaller when switch cabinet electricity detection, electrical verification program is troublesome and security risk is higher.Using this hair
It is bright, electrical verification simple, safely, effectively can be carried out to switchgear.
Detailed description of the invention
Fig. 1 is a kind of electric bridge comparison expression switch cabinet phasing structure drawing of device proposed by the present invention；
Fig. 2 is a kind of electric bridge comparison expression switch cabinet phasing device hardware elementary diagram.
Diagram: resistive arm 2, current potential table 3, bottom plate 11, the first mounting plate 12, the second mounting plate 13, support plate 14.
Specific embodiment
Referring to Fig.1, a kind of electric bridge comparison expression switch cabinet phasing device proposed by the present invention, comprising: vehicle frame, six resistive arms
2 and three current potential tables 3.
Six resistive arms 2 are installed on vehicle frame, and six resistive arms 2 are respectively corresponded to the first power supply of nuclear phase and the second electricity
A, B, C three-phase in source.Each resistive arm 2 is composed in series by a measurement resistance and a divider resistance, and divider resistance is small
In measurement resistance.Resistive arm 2 is connected by measuring resistance with corresponding power phase, and is grounded by divider resistance, measurement electricity
The tie point of resistance and divider resistance is as nuclear phase voltage output end.
Corresponding first power supply and two resistive arms 2 of the same phase of second source partner and compare arm, and each pair is compared
It is equal with the ratio of divider resistance that resistance is measured in arm, on two resistive arms 2.
Three current potential tables 3 arm compared with three pairs corresponds, and 3 two input terminals of each current potential table are separately connected corresponding comparison
The nuclear phase voltage output end of two resistive arms 2 in arm.
Specifically, the phase checking device hardware elementary diagram is as shown in Figure 2.Wherein, A1, B1, C1 are corresponding first in switchgear
The contact of power supply A, B, C three-phase, A2, B2, C2 are the contact that second source A, B, C three-phase is corresponded in switchgear.Measure resistance RA1
With the resistive arm of divider resistance Ra1 the first power supply of correspondence A phase in series, resistance RB1 and divider resistance Rb1 series connection structure is measured
At the resistive arm of corresponding first power supply B-phase, resistance RC1 and divider resistance Rc1 the first power supply of correspondence C phase in series is measured
Resistive arm；The resistive arm of resistance RA2 and divider resistance Ra2 corresponding second source A phase in series is measured, resistance is measured
The resistive arm of RB2 and divider resistance Rb2 corresponding second source B-phase in series measures resistance RC2 and divider resistance Rc2 string
Connection constitutes the resistive arm of corresponding second source C phase.
First current potential Table V 1 is connected between divider resistance Ra1 and divider resistance Ra2, and the second current potential Table V 2 is connected on partial pressure
Between resistance Rb1 and divider resistance Rb2, the second current potential Table V 3 is connected between divider resistance Rc1 and divider resistance Rc2.
When nuclear phase, vehicle frame is pushed into the state of switchgear, and each resistive arm 2 is existed by measurement resistance with corresponding setting respectively
Power contact electrical connection in switchgear.By taking the A phase of the first power supply and second source as an example.
Divider resistance Ra1 voltage-to-ground are as follows:
Divider resistance Ra2 voltage-to-ground are as follows:
UA1For the first power supply A phase voltage, UA2For second source A phase voltage.
Due toSo
If UA1=UA2, then Ua1=Ua2；In this way, the first current potential table two sides current potential is identical, pointer is not deflected.If UA1
≠UA2, then Ua1≠Ua2；The deflection of first current potential list index.Therefore the first current potential list index deflection situation of observation, it can know first
Whether power supply and second source A phase voltage are equal.
Similarly, by the deflection situation of 2 pointer of the second current potential Table V, it can know the first power supply and second source B phase voltage
It is whether equal；By the deflection situation of 3 pointer of third current potential Table V, can know whether are the first power supply and second source C phase voltage
It is equal.
In present embodiment, on each resistive arm 2, the ratio for measuring resistance and divider resistance is greater than or equal to 100, to avoid
Divider resistance voltage-to-ground is excessive, current potential table demand is reduced, to reduce cost.
For example, measurement resistance selects the resistance of 999k Ω in present embodiment, divider resistance selects the resistance of 1k Ω such as
This, by taking the first power supply and second source A phase as an example:
In present embodiment, in order to guarantee the accurate of the first power supply and each phase nuclear phase of second source, each pair is compared arm
In, the measurement resistance on two resistive arms 2 is identical, and the divider resistance resistance value on two resistive arms 2 is identical.
It is accurate for each phase nuclear phase in present embodiment, on each resistive arm, measure the ratio of resistance and divider resistance
Value is equal.Further, the measurement resistance of each resistive arm is identical, the divider resistance resistance value phase of each resistive arm
Together, in order to calculate, nuclear phase efficiency is improved.
In present embodiment, vehicle frame includes bottom plate 11, the first mounting plate 12 and the second mounting plate 13.First mounting plate, 12 He
Second mounting plate 13 is vertically mounted in parallel to each other on bottom plate 11, and what six resistive arms 2 were parallel to each other is vertically mounted on first
On mounting plate 12 and it is located at side of first mounting plate 12 far from the second mounting plate 13, three current potential tables 3 are installed in the second peace
In loading board 13 and it is located at side of second mounting plate 13 far from the first mounting plate 12.The mounting means of six resistive arms 2, facilitates
The contact of resistive arm and contact in switchgear, the observation to pointer easy for installation of current potential table 3.
In present embodiment, the first mounting plate 12 and the second mounting plate 13 cooperation bottom plate 11 form F type structure, and the first peace
Loading board 12 is located at 11 middle part of bottom plate, so that the first mounting plate 12 cooperation bottom plate 11 protects resistive arm 2.Present embodiment
In, six resistive arms 2 are in rectangular arranged on the first mounting plate 12, and six resistive arms 2 are fixed by screws in the first peace
In loading board 12, with easy disassembly.
In present embodiment, opposite sides is also equipped with the support plate 14 being parallel to each other on bottom plate 11, and support plate 14 clamps
Between the first mounting plate 12 and the second mounting plate 13.By support plate 14, it can be further ensured that the first mounting plate 12 and second
Mounting plate 13 stablizes installation, to guarantee the functional reliability of resistive arm 2.
The above, preferable specific embodiment only of the present invention, but protection scope of the present invention not office
Be limited to this, anyone skilled in the art in the technical scope disclosed by the present invention, technology according to the present invention
Scheme and its inventive concept are subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of electric bridge comparison expression switch cabinet phasing device characterized by comprising vehicle frame, six resistive arms (2) and three electricity
Position table (3)；
Six resistive arms (2) are installed on vehicle frame, and six resistive arms (2) respectively correspond to the first power supply of nuclear phase and the second electricity
A, B, C three-phase in source；Each resistive arm (2) is composed in series by a measurement resistance and a divider resistance, divider resistance
Less than measurement resistance；Resistive arm (2) is connected by measuring resistance with corresponding power phase, and is grounded by divider resistance, is surveyed
The tie point of resistance and divider resistance is measured as nuclear phase voltage output end；
Two resistive arms (2) of corresponding first power supply and the same phase of second source, which partner, compares arm, and each pair is compared arm
In, it is equal with the ratio of divider resistance that resistance is measured on two resistive arms (2)；
Three current potential tables (3) arm compared with three pairs corresponds, and (3) two input terminals of each current potential table are separately connected corresponding comparison
The nuclear phase voltage output end of two resistive arms (2) in arm.
2. electric bridge comparison expression switch cabinet phasing device as described in claim 1, which is characterized in that on each resistive arm (2), measurement
The ratio of resistance and divider resistance is greater than or equal to 100.
3. electric bridge comparison expression switch cabinet phasing device as claimed in claim 2, which is characterized in that each pair is compared in arm, and two
Measurement resistance on a resistive arm (2) is identical, and the divider resistance resistance value on two resistive arms (2) is identical.
4. electric bridge comparison expression switch cabinet phasing device as claimed in claim 2, which is characterized in that on each resistive arm, survey
The ratio of amount resistance and divider resistance is equal.
5. electric bridge comparison expression switch cabinet phasing device as claimed in claim 4, which is characterized in that the measurement of each resistive arm
Resistance is identical, and the divider resistance resistance value of each resistive arm is identical.
6. electric bridge comparison expression switch cabinet phasing device as described in claim 1, which is characterized in that vehicle frame include bottom plate (11),
First mounting plate (12) and the second mounting plate (13)；First mounting plate (12) and the second mounting plate (13) are vertically pacified in parallel to each other
On bottom plate (11), what six resistive arms (2) were parallel to each other is vertically mounted on the first mounting plate (12) and is located at the first peace
Side of the loading board (12) far from the second mounting plate (13), three current potential tables (3) are installed on the second mounting plate (13) and are located at
Side of second mounting plate (13) far from the first mounting plate (12)；Vehicle frame is pushed into the state of switchgear, and each resistive arm (2) is respectively
It is electrically connected by measurement resistance with the corresponding power contact being arranged in switchgear.
7. electric bridge comparison expression switch cabinet phasing device as claimed in claim 6, which is characterized in that the first mounting plate (12) and
Two mounting plates (13) cooperate bottom plate (11) to form F type structure, and the first mounting plate (12) is located in the middle part of bottom plate (11).
8. electric bridge comparison expression switch cabinet phasing device as claimed in claim 6, which is characterized in that six resistive arms (2) are
It is in rectangular arranged on one mounting plate (12).
9. electric bridge comparison expression switch cabinet phasing device as claimed in claim 8, which is characterized in that and six resistive arms (2) are equal
It is fixed by screws on the first mounting plate (12).
10. electric bridge comparison expression switch cabinet phasing device as claimed in claim 6, which is characterized in that opposite two on bottom plate (11)
Side is also equipped with the support plate (14) being parallel to each other, and support plate (14) is clamped in the first mounting plate (12) and the second mounting plate (13)
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266738.5A CN110068731A (en) | 2019-04-03 | 2019-04-03 | A kind of electric bridge comparison expression switch cabinet phasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266738.5A CN110068731A (en) | 2019-04-03 | 2019-04-03 | A kind of electric bridge comparison expression switch cabinet phasing device |
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| CN110068731A true CN110068731A (en) | 2019-07-30 |
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| CN201910266738.5A Pending CN110068731A (en) | 2019-04-03 | 2019-04-03 | A kind of electric bridge comparison expression switch cabinet phasing device |
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|---|---|---|---|---|
| US4885532A (en) * | 1987-08-24 | 1989-12-05 | Macey Mining Services Pty. Ltd. | Apparatus for testing multiphase outlet with visual indication of phase energization, phase rotation, and supply voltage |
| CN2169859Y (en) * | 1993-08-19 | 1994-06-22 | 鞍山钢铁公司 | High and low voltage phase measurer |
| CN201590615U (en) * | 2009-11-24 | 2010-09-22 | 华北电网有限公司廊坊供电公司 | High-pressure nuclear phase device for central-positioned high-voltage switch cabinets |
| CN201876504U (en) * | 2010-12-02 | 2011-06-22 | 河南省电力公司安阳供电公司 | Nuclear phase handcart |
| CN103364648A (en) * | 2013-07-17 | 2013-10-23 | 燕开电气股份有限公司 | Nuclear phase device and electroscope used in cooperation with nuclear phase device |
| CN103904578A (en) * | 2014-04-21 | 2014-07-02 | 国网安徽省电力公司淮南供电公司 | Integrated handcart with phase testing function and bus grounding function for high-voltage switch cabinet |
| CN204462260U (en) * | 2015-04-02 | 2015-07-08 | 孙涤沙 | The special phasing tester of 6kV mother |
| CN206725663U (en) * | 2017-04-24 | 2017-12-08 | 北京首都机场动力能源有限公司 | A kind of switch cabinet phasing car |
| CN210037968U (en) * | 2019-04-03 | 2020-02-07 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | High-voltage nuclear phase trolley |
-
2019
- 2019-04-03 CN CN201910266738.5A patent/CN110068731A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4885532A (en) * | 1987-08-24 | 1989-12-05 | Macey Mining Services Pty. Ltd. | Apparatus for testing multiphase outlet with visual indication of phase energization, phase rotation, and supply voltage |
| CN2169859Y (en) * | 1993-08-19 | 1994-06-22 | 鞍山钢铁公司 | High and low voltage phase measurer |
| CN201590615U (en) * | 2009-11-24 | 2010-09-22 | 华北电网有限公司廊坊供电公司 | High-pressure nuclear phase device for central-positioned high-voltage switch cabinets |
| CN201876504U (en) * | 2010-12-02 | 2011-06-22 | 河南省电力公司安阳供电公司 | Nuclear phase handcart |
| CN103364648A (en) * | 2013-07-17 | 2013-10-23 | 燕开电气股份有限公司 | Nuclear phase device and electroscope used in cooperation with nuclear phase device |
| CN103904578A (en) * | 2014-04-21 | 2014-07-02 | 国网安徽省电力公司淮南供电公司 | Integrated handcart with phase testing function and bus grounding function for high-voltage switch cabinet |
| CN204462260U (en) * | 2015-04-02 | 2015-07-08 | 孙涤沙 | The special phasing tester of 6kV mother |
| CN206725663U (en) * | 2017-04-24 | 2017-12-08 | 北京首都机场动力能源有限公司 | A kind of switch cabinet phasing car |
| CN210037968U (en) * | 2019-04-03 | 2020-02-07 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | High-voltage nuclear phase trolley |
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Application publication date: 20190730 |