CN204789832U - CVT high -voltage testing's line changing device and CVT high -voltage testing device - Google Patents
CVT high -voltage testing's line changing device and CVT high -voltage testing device Download PDFInfo
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- CN204789832U CN204789832U CN201520539938.0U CN201520539938U CN204789832U CN 204789832 U CN204789832 U CN 204789832U CN 201520539938 U CN201520539938 U CN 201520539938U CN 204789832 U CN204789832 U CN 204789832U
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Abstract
The utility model relates to a CVT high -voltage testing's line changing device, including a test circuit, the 2nd test circuit and connecting wire, connecting wire connects a test circuit and the 2nd test circuit. A test circuit includes first test wire, high -voltage line, a control switch and the 2nd control switch. The 2nd test circuit includes second test wire, measures line and the 3rd control switch. Through the state of controlling a control switch and the 2nd control switch to control the switching on and break off of test circuit, changing circuitry's connected mode realizes automatic line changing function. Transfer to the line changing device with the high altitude line changing and accomplish, reduced the personnel's quantity and physical power input that to work requiredly, reduced the equipment and person harm risk that exists in the process of the test. Through changing inside the switching on and closing of passageway of measuring, accomplish the high pressure test to the different voltage -dividing capacitor of CVT, 1 wiring has been realized and whole high -voltage testing can be accomplished, improved work efficiency.
Description
Technical field
The utility model relates to CVT field tests, particularly relates to a kind of wire-changing device and CVT high-pressure test device of CVT high-potting.
Background technology
CVT (CapacitorVoltageTransformers, capacitance type potential transformer) is a kind of electrical equipment, is often applied in high-voltage electric power system.CVT utilizes capacitance partial pressure can obtain voltage monitoring signal, by carrying out experimental test to derided capacitors, is the main of CVT condition diagnosing and effective means.Derided capacitors generally comprises three economize on electricitys to be held, when testing derided capacitors, need to carry out the parameters such as insulation resistance, dielectric loss and electric capacity to each economize on electricity appearance to test, because high-voltage electric power system is in high-pressure work state, CVT is generally in the higher position of overhead about 10 meters, in test process, all wiring are work high above the ground.
In order to reduce the risk that personnel climb and high-altitude operation vehicle brings, the high-potting wiring of current CVT is carried out mainly through telescopic insulating bar.Test lead is connected on the copper hook of expansion link upper end, then vertically raises expansion link, ferrule is articulated on the tie point of voltage-dividing capacitor, completes test connection.Use telescopic insulating bar to assist during the wiring of CVT high-potting and there is higher risk, such as, when telescopic insulating bar rises to the highest, the have an effect unbalance and external cause such as to blow of the gravity of himself, operating personnel all can cause it to slant or fall down, cause injury to personnel or equipment impaired, even directly swing to and close on charging equipment, cause electric shock accidents even power grid accident.And in the whole high-potting process of CVT, in order to test the parameter of three derided capacitors respectively, need the high-altitude wiring carried out three times or more, the risk of test also increases.
Utility model content
Based on this, be necessary, for the high problem of risk during the wiring of CVT high-potting, to provide a kind of wire-changing device and the CVT high-pressure test device that reduce the CVT high-potting of empirical risk.
A wire-changing device for CVT high-potting, comprising:
First test circuit, comprises the first test lead, hi-line, the first gauge tap and the second gauge tap; Described hi-line comprises high pressure heart yearn and high voltage shield successively, the coated described high pressure heart yearn of described high voltage shield; Described first gauge tap comprises the first stiff end be connected with the first test lead, the first selecting side connecting the described high pressure heart yearn of described hi-line and the described high voltage shield of described hi-line respectively and the second selecting side; Described second gauge tap comprises and is connected the second stiff end that wire connects, the 3rd selecting side connecting the described high pressure heart yearn of described hi-line and the described high voltage shield of described hi-line respectively and the 4th selecting side with described;
Second test circuit, comprises the second test lead, slotted line and the 3rd gauge tap; Described 3rd gauge tap comprises the 3rd stiff end be connected with described second test lead, the 5th selecting side connecting described connection wire and described slotted line respectively and the 6th selecting side;
Connect wire, be connected between the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap.
Wherein in an embodiment, the wire-changing device of described CVT high-potting also comprises:
First shielding box, described first test circuit is located in described first shielding box, and described hi-line and described first test lead are each passed through described first shielding box and are in communication with the outside; The described high voltage shield of described hi-line and described first shielding box housing contacts;
Described connection wire, through described first shielding box, connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively.
Wherein in an embodiment, described first test lead comprises the first heart yearn, the first screen layer and the first ground successively and connects layer, and described first screen layer connects between layer at described first heart yearn and described first ground; Described first screen layer and described first shielding box housing contacts, described first heart yearn is connected with described first stiff end of described first gauge tap, and described first ground connects a layer ground connection.
Wherein in an embodiment, the wire-changing device of described CVT high-potting also comprises:
Secondary shielding box, described second test circuit is located in described secondary shielding box, and described slotted line and described second test lead are each passed through described secondary shielding box and are in communication with the outside; The described secondary shielding layer of described second test lead and described secondary shielding box housing contacts;
Described second test lead comprises the second heart yearn, secondary shielding layer and the second ground successively and connects layer, and described secondary shielding layer connects between layer at described second heart yearn and described second ground; Described secondary shielding layer and described secondary shielding box housing contacts, described second heart yearn is connected with described 3rd stiff end of described 3rd gauge tap, and described second ground connects a layer ground connection;
Described connection wire, through described first shielding box and described secondary shielding box, connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively.
Wherein in an embodiment, described connection wire comprises and connects wire heart yearn and connect conductor shield, the coated described connection wire heart yearn of described connection conductor shield; Described connection wire heart yearn connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively; Described connection conductor shield and described first shielding box housing contacts, and with the noncontact of described secondary shielding box shell.
Wherein in an embodiment, the wire-changing device of described CVT high-potting also comprises the 4th gauge tap, and described slotted line comprises successively to be measured heart yearn and connect layer with measuring; Connect to described measurement the coated described measurement heart yearn of layer; Described 4th gauge tap comprises the 4th stiff end be connected with secondary shielding box shell, connect layer respectively the 7th selecting side and the 8th selecting side with connecting the described screen layer of described connection wire and the described measurement of described slotted line; Described measurement heart yearn is connected with the 6th selecting side of described 3rd switch, connects to described measurement layer and described secondary shielding box shell noncontact and ground connection.
Wherein in an embodiment, described hi-line connects layer with also comprising high pressure, and described high voltage shield connects between layer at described high pressure heart yearn and described high pressure, connects a layer ground connection described high pressure.
Wherein in an embodiment, the wire-changing device of described CVT high-potting also comprises insulation booth, described connection wire, described first test circuit and described second test circuit are all placed in described insulation booth, and one end of one end of described first test lead, one end of described second test lead, one end of described hi-line and described slotted line is each passed through described insulation booth and is in communication with the outside.
The utility model additionally provides a kind of CVT high-pressure test device, comprises the wire-changing device of tester and above-mentioned CVT high-potting; Described first test lead of the wire-changing device of described CVT high-potting is connected with CVT to be tested respectively with described second test lead, and the described hi-line of the wire-changing device of described CVT high-potting is connected with described tester respectively with described slotted line.
Wherein in an embodiment, described tester comprises the dielectric loss measuring instrument of dielectric loss for measuring electric capacity in CVT and electric capacity parameter and the Insulation Resistance Tester for the insulation resistance parameter of measuring electric capacity in CVT.
The wire-changing device of above-mentioned CVT high-potting, for auxiliary CVT high-potting.Before test, with wire-changing device connecting test instrument and test lead, test lead is connected on position corresponding on equipment.In process of the test, change the state of the inner multi-way switch element of wire-changing device, test lead is connected with testing tool, wire-changing device is transferred to complete high-altitude thread-changing, high-altitude thread replacing work in traditional experiment process is transformed into ground carry out, decrease the personnel amount required for this work and muscle power input, reduce the equipment and hazard to person risk that exist in process of the test.By conducting and the closedown of conversion internal measurement passage, complete the Hi-pot test to the different derided capacitors of CVT, by high-altitude wiring number of times from repeatedly dropping to 1 time, achieving 1 wiring and can complete whole high-potting, improve work efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the wire-changing device of the CVT high-potting of an embodiment;
Fig. 2 is the schematic diagram of the wire-changing device of the CVT high-potting of another embodiment;
Fig. 3 is the schematic diagram of the wire-changing device of the CVT high-potting of another embodiment;
Fig. 4 is the schematic diagram of the wire-changing device of the CVT high-potting of another embodiment;
Fig. 5 is the schematic diagram of the wire-changing device of the CVT high-potting of another embodiment;
Fig. 6 is the schematic diagram of the wire-changing device of the CVT high-potting of another embodiment;
Fig. 7 is the schematic diagram of CVT high-pressure test device.
Embodiment
Refer to Fig. 1, embodiment one, a kind of wire-changing device 1000 of CVT high-potting is provided, comprise the first test circuit, the second test circuit and connect wire 200.Wherein, first test circuit comprises the first test lead 110, hi-line 130, first gauge tap and the second gauge tap, hi-line 130 comprises high pressure heart yearn and high voltage shield successively, the coated high pressure heart yearn of high voltage shield, first gauge tap comprises the first stiff end K10, the first selecting side K11 and the second selecting side K12, first stiff end K10 is connected with the first test lead 110, first selecting side K11 connects the high pressure heart yearn of hi-line 130, and the second selecting side K12 connects the high voltage shield of hi-line 130.Second gauge tap comprises the second stiff end K20, the 3rd selecting side K13 and the 4th selecting side K14, second stiff end K20 connects wire 200,3rd selecting side K13 connects the high pressure heart yearn of hi-line 130, and the 4th selecting side K14 connects the high voltage shield of hi-line 130.Second test circuit comprises the second test lead 120, slotted line 140 and the 3rd gauge tap.Wherein, 3rd gauge tap comprises the 3rd stiff end K30, the 5th selecting side K15 and the 6th selecting side K16,3rd stiff end K30 is connected with the second test lead 120, the 5th selecting side K15 be connected wire 200 and connect, the 6th selecting side K16 is connected with slotted line 140.Connect wire 200 to be connected between the second stiff end K20 of the second gauge tap and the 5th selecting side K15 of the 3rd gauge tap.
Before utilizing the wire-changing device 1000 of CVT high-potting to carry out CVT high-potting, the first test lead 110 of the wire-changing device 1000 of CVT high-potting and the second test lead 120 are connected to position corresponding in CVT.In process of the test, by the state of the wire-changing device 1000 internal control switch of control CVT high-potting, thus the conducting of wire-changing device 1000 internal circuit of control CVT high-potting and disconnection, change the connected mode of the first test circuit and the second test circuit respectively, and then change pilot passageway, realize automatic thread-changing function.Transfer to wire-changing device to complete high-altitude thread-changing, the high-altitude thread replacing work in traditional experiment process is transformed into ground and carries out, decrease the personnel amount required for this work and muscle power input, reduce the equipment and hazard to person risk that exist in process of the test.By conducting and the closedown of conversion internal measurement passage, complete the Hi-pot test to the different derided capacitors of CVT, by high-altitude wiring number of times from repeatedly dropping to 1 time, achieving 1 wiring and can complete whole high-potting, improve work efficiency.
Further, hi-line 130 connects layer with also comprising high pressure, and high voltage shield connects between layer at high pressure heart yearn and high pressure, connects a layer ground connection high pressure.By high pressure is connect a layer ground connection, high pressure heart yearn can be prevented to be energized when pressing and to produce assorted sudden strain of a muscle, reduce the impact on test result, make test result more accurate.
Particularly, the first test lead 110, second test lead 120, hi-line 130 and slotted line 140 are concentric cable, and when adopting concentric cable, external electrical field can not affect inside, and internal electric field also can not have influence on outside, effectively can shield interference.
Below with the conducting state that wire-changing device 1000 internal circuit of CVT high-potting is different, it is that example is illustrated that change circuit connecting mode realizes thread-changing function.
Please continue to refer to Fig. 1, wherein, the first stiff end K10 of the first gauge tap is connected with the first selecting side K11, and the high pressure heart yearn of hi-line 130 is connected with the first test lead 110.Second stiff end K20 of the second gauge tap is connected with the 4th selecting side K14,3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15,5th selecting side K15 connects by being connected wire 200 with the second stiff end K20 of the second gauge tap, thus the 5th selecting side K15 is connected with the 4th selecting side K14.Because the 4th selecting side K14 is connected with the high voltage shield of hi-line 130, when being provided high pressure by hi-line 130, the current potential of high voltage shield is suitable with the current potential of high pressure heart yearn, the current potential of the second test lead 120 is consistent with the high voltage shield current potential of hi-line 130, second test lead 120 is equivalent to equipotential line, by hi-line 130 for the first test lead 110 provides high pressure, the first test lead 110 is connected respectively to position corresponding in CVT with the second test lead 120.By the connected state of foregoing circuit, the parameter of CVT respective element can be tested.
Refer to Fig. 2, first stiff end K10 of the first gauge tap is connected with the first selecting side K11, connect wire 200 unsettled, 3rd stiff end K30 of the 3rd gauge tap is connected with slotted line 140, first test lead 110 connects the high pressure heart yearn of hi-line 130, by high pressure heart yearn for the first test lead 110 provides high pressure, electric current flows into the first test lead 110, flow out from the second test lead 120 after flowing through CVT respective element, second test lead 120 connects slotted line 140, first test lead 110 and the second test lead 120 are connected to the parameter of the corresponding position measurement respective element of CVT.
Refer to Fig. 3, first stiff end K10 of the first gauge tap is connected with the second selecting side K12, second stiff end K20 of the second gauge tap is connected with the 3rd selecting side K13,3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15, second stiff end K20 of the second gauge tap is connected with the 5th selecting side K15, thus the 3rd stiff end K30 of the 3rd gauge tap is connected with the second stiff end K20 of the second gauge tap, the second test lead 120 connects the high pressure heart yearn of hi-line 130.For the second test lead 120 provides high pressure, the first test lead 110 is connected with the high voltage shield of hi-line 130, and the voltage of the first test lead 110 is consistent with the high voltage shield current potential of hi-line 130, and the first test lead 110 is equivalent to equipotential line.First test lead 110 and the second test lead 120 are connected to the parameter of the corresponding position measurement respective element of CVT.
Embodiment two, the element that the wire-changing device 1000 of the CVT high-potting that the present embodiment and embodiment one provide comprises is similar, namely comprises the first test circuit, the second test circuit and connects wire.Refer to Fig. 4, the wire-changing device 1000 of the CVT high-potting that the present embodiment provides also comprises the first shielding box 300 and secondary shielding box 400.
First test circuit is located in the first shielding box 300, hi-line 130 and the first test lead 110 are each passed through the first shielding box 300 and are in communication with the outside, the high voltage shield of hi-line 130 and the first shielding box 300 housing contacts, connect wire 200 through the first shielding box 300, connect the second stiff end K20 of the second gauge tap and the 5th selecting side K15 of the 3rd gauge tap respectively.
First shielding box 300 shell contacts with high voltage shield, and the current potential of high voltage shield is suitable with the current potential of high pressure heart yearn.When being provided high pressure by high pressure heart yearn, high voltage shield current potential is high pressure, and the first shielding box 300 current potential is high pressure, forms a high pressure equipotential box.Electric field is formed when the first test lead 110 and hi-line 130 are communicated with by the first gauge tap, easily be subject to the interference of external environment, external environment condition produces certain influence to wire electric field, by the first test circuit being arranged in the first shielding box 300, can effectively prevent external environment condition on the impact of internal electric field, internal electric field also can not have influence on outside, can effectively avoid interference.
First test lead 110 comprises the first heart yearn, the first screen layer and the first ground successively and connects layer, first screen layer connects between layer at the first heart yearn and the first ground, first screen layer and the first shielding box 300 housing contacts, first heart yearn is connected with the first stiff end K10 of the first gauge tap, and the first ground connects a layer ground connection.First screen layer and the first shielding box 300 housing contacts, the first screen layer and the first shielding box 300 equipotential, carry out anti-tampering protection to the circuit in the first shielding box 300 further.
Second test circuit is located in secondary shielding box 400, slotted line 140 and the second test lead 120 are each passed through secondary shielding box 400 and are in communication with the outside, the secondary shielding layer of the second test lead 120 and secondary shielding box 400 housing contacts, wherein, second test lead 120 comprises the second heart yearn, secondary shielding layer and the second ground successively and connects layer, and secondary shielding layer connects between layer at the second heart yearn and the second ground; Secondary shielding layer and secondary shielding box 400 housing contacts, the second heart yearn is connected with the 3rd stiff end K30 of the 3rd gauge tap, and the second ground connects a layer ground connection.Connect wire 200 through the first shielding box 300 and secondary shielding box 400, connect the second stiff end K20 of the second gauge tap and the 5th selecting side K15 of the 3rd gauge tap respectively.
The secondary shielding layer equipotential of secondary shielding box 400 and the second test lead 120, secondary shielding box 400 forms equipotential box, can be placed in the second test circuit of its inside by available protecting, prevents from outsidely having an impact to the second test circuit, effectively avoids interference.
Connect wire 200 comprise connection wire heart yearn and connect conductor shield, connect conductor shield coated connection wire heart yearn; Connect wire heart yearn and connect the second stiff end K20 of the second gauge tap and the 5th selecting side K15 of the 3rd gauge tap respectively, connect conductor shield and the first shielding box 300 housing contacts, and with the noncontact of secondary shielding box 400 shell.
Connect conductor shield and the contact of the first shielding box 300 shell and make to be connected wire 200 screen layer and the first shielding box 300 current potential quite, formation equipotential.Connecting conductor shield can prevent the connection wire heart yearn between the first shielding box 300 and secondary shielding box 400 to be subject to external influence, when making connection wire heart yearn be communicated with the first shielding box 300 and secondary shielding box 400, avoids interference.
Be appreciated that the wire-changing device 1000 of CVT high-potting also can only include the one in the first shielding box 300 and secondary shielding box 400, when only including the first shielding box 300, the first shielding box 300 carries out anti-tampering protection to the first test circuit.When only including secondary shielding box 400, secondary shielding box 400 carries out anti-tampering protection to the second test circuit.
The wire-changing device 1000 of above-mentioned CVT high-potting also comprises the 4th gauge tap, and slotted line 140 comprises successively to be measured heart yearn and connect layer with measuring; Connect the coated measurement heart yearn of layer with measuring.4th gauge tap comprises the 4th stiff end K40 be connected with secondary shielding box 400 shell, connect layer the 7th selecting side K17 and the 8th selecting side K18 with connecting the connection conductor shield of wire 200 and the measurement of slotted line 140 respectively; Measure heart yearn to be connected with the 6th selecting side K16 of the 3rd switch, connect layer and secondary shielding box 400 shell noncontact and ground connection to measurement.
By controlling the 4th gauge tap, the current potential of secondary shielding box 400 can be changed, thus make the current potential of the first shielding box 300 and secondary shielding box 400 suitable with the current potential of the first test lead 110 and the second test lead 120 respectively, form equipotential shielding box.Such as, when the 7th selecting side K17 of the 4th gauge tap connects with connection wire 200 screen layer being connected wire 200, the current potential of secondary shielding box 400 is suitable with the first shielding box 300 current potential, when the 7th selecting side K17 of the 4th gauge tap is connected with the measurement screen layer of slotted line 140, secondary shielding box 400 is equivalent to ground connection, and current potential is zero.
The wire-changing device of above-mentioned CVT high-potting also comprises insulation booth 500, connecting wire 200, first test circuit and the second test circuit is all placed in insulation booth 500, and one end of one end of the first test lead 110, one end of the second test lead 120, one end of hi-line 130 and slotted line 140 is each passed through insulation booth 500 and is in communication with the outside.Part first test lead 110 be in communication with the outside and part second test lead 120, by being connected with CVT to be tested, are tested the parameter of electric capacity in CVT.
Need to utilize the first test lead 110 to be connected external unit with the second test lead 120 when testing, the first test lead 110, second test lead 120, hi-line 130 and slotted line can be connected with CVT to be measured respectively by conductor interface 600.
The conducting state that wire-changing device 1000 internal circuit of the CVT high-potting provided with the present embodiment is below different, changing circuit connecting mode, to realize thread-changing function be that example is illustrated.
Refer to Fig. 4, wherein, first shielding box 300 is or/and secondary shielding box 400 is placed in insulation booth 500, one end of first test lead 110 and one end of hi-line 130 are in communication with the outside through the first shielding box 300 and insulation booth 500 respectively successively, and one end of the second test lead 120 and one end of slotted line 140 are in communication with the outside through secondary shielding box 400 and insulation booth 500 respectively successively.
First stiff end K10 of the first gauge tap is connected with the first selecting side K11, and the high pressure heart yearn of hi-line 130 is connected with the first heart yearn of the first test lead 110.Second stiff end K20 of the second gauge tap is connected with the 4th selecting side K14,4th stiff end K40 of the 4th gauge tap is connected with the 7th selecting side K17,3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15,5th selecting side K15 is connected by the connection wire heart yearn being connected wire 200 with the second stiff end K20 of the second gauge tap, thus the 5th selecting side K15 is connected with the 4th selecting side K14.Because the 4th selecting side K14 is connected with the first shielding box 300 shell, first shielding box 300 shell is connected with the high voltage shield of hi-line 130, when the high pressure heart yearn by hi-line 130 provides high pressure, the current potential of high voltage shield is suitable with the current potential of high pressure heart yearn, the voltage of the second test lead 120 is consistent with the high voltage shield current potential of hi-line 130, second test lead 120 is equivalent to equipotential line, by the high pressure heart yearn of hi-line 130 for the first test lead 110 provides high pressure, first test lead 110 is successively through the first shielding box 300 and insulation booth 500, CVT correspondence position is connected to by conductor interface 600, second test lead 120 is successively through secondary shielding box 400 and insulation booth 500, position corresponding to CVT equipment is connected to by conductor interface 600.By the connected state of foregoing circuit, the parameter of the corresponding element of CVT can be tested.
Refer to Fig. 5, first stiff end K10 of the first gauge tap is connected with the first selecting side K11, connect wire 200 unsettled, 3rd stiff end K30 of the 3rd gauge tap is connected with the 6th selecting side K16, thus the 3rd stiff end K30 of the 3rd gauge tap is connected with slotted line 140, 4th stiff end K40 of the 4th gauge tap is connected with the 8th selecting side K18, layer is connect and ground connection with selecting the measurement of section K18 and slotted line 140 due to the 8th, 4th stiff end K40 of the 4th gauge tap is connected with secondary shielding box 400, thus secondary shielding box 400 earthing of casing, its current potential is zero.First heart yearn of the first test lead 110 connects the high pressure heart yearn of hi-line 130, and for the first test lead 110 provides high pressure, the second heart yearn of the second test lead 120 connects the measurement heart yearn of slotted line 140.First test lead 110 and the second test lead 120 are connected to position corresponding to CVT equipment, thus can test the parameter of the corresponding element of CVT.
Refer to Fig. 6, first stiff end K10 of the first gauge tap is connected with the second selecting side K12, second stiff end K20 of the second gauge tap is connected with the 3rd selecting side K13, 3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15, second stiff end K20 of the second gauge tap is connected by the connection wire heart yearn being connected wire 200 with the 5th selecting side K15, thus the 3rd stiff end K30 of the 3rd gauge tap is connected with the second stiff end K20 of the second gauge tap, second heart yearn of the second test lead 120 connects the high pressure heart yearn of hi-line 130, 4th stiff end K40 of the 4th gauge tap is connected with the 7th selecting side K17, thus connect with the connection conductor shield being connected wire 200.By hi-line 130 high pressure heart yearn for the second test lead 120 provides high pressure, first heart yearn of the first test lead 110 is connected with the first shielding box 300 shell, the current potential of the first heart yearn of the first test lead 110 is suitable with the high voltage shield current potential of hi-line 130, and the first test lead 110 is equivalent to equipotential line.First test lead 110 and the second test lead 120 are connected to the parameter of the corresponding position measurement respective element of CVT equipment.
Refer to Fig. 7, the utility model also carries a kind of CVT high-pressure test device 1100 of preferred embodiment, comprises the wire-changing device 1000 of tester 10 and above-mentioned CVT high-potting, utilizes CVT high-pressure test device 1100 to test CVT30 to be tested.First test lead 110 of the wire-changing device 1000 of CVT high-potting is connected with CVT30 to be tested respectively with the second test lead 120, and the hi-line 130 of the wire-changing device 1000 of CVT high-potting is connected with tester 10 respectively with slotted line.
Tester 10 comprises dielectric loss measuring instrument and Insulation Resistance Tester, and dielectric loss measuring instrument is for measuring dielectric loss and the electric capacity parameter of electric capacity in CVT30, and Insulation Resistance Tester is for measuring the insulation resistance parameter of electric capacity in CVT30.
Wherein, CVT30 comprises the first electric capacity 31, second electric capacity 32, the 3rd electric capacity 33 and the 4th electric capacity 34 that are connected in series, also comprises the first switch 35, second switch 36 and transformer 37; One end connection bus of the first electric capacity 31 ground connection, second electric capacity 32 is connected between the first electric capacity 31 and the 3rd electric capacity 33,3rd electric capacity 33 is connected between the second electric capacity 32 and the 4th electric capacity 34, first switch 35 one end is connected with the 4th electric capacity 34, the other end ground connection of the first switch 35, second switch 36 one end is connected between the 3rd electric capacity 33 and the 4th electric capacity 34, and one end of the output winding of connection transformer 37, the other end ground connection of second switch 36, the other end ground connection of the output winding of transformer 37; The other end of the first test lead 110 of the wire-changing device 1000 of CVT high-potting is connected between the first electric capacity 31 and the second electric capacity 32, and the other end of the second test lead 120 is connected between the second electric capacity 32 and the 3rd electric capacity 33.
The outermost layer of the first test lead 110 and the second test lead 120 arranges insulation course 150, and the setting of insulation course 150 can improve Security of test.
Below with the conducting state that wire-changing device 1000 internal circuit of CVT high-potting is different, change circuit connecting mode and realize thread-changing, thus reality is that example is illustrated to the test of the parameter of electric capacity different in CVT30.
Please continue to refer to Fig. 4 and Fig. 7, the first test lead 110 and the second test lead 120 connect the A point between the first electric capacity 31 in CVT30 and the second electric capacity 32 and the B point position between the second electric capacity 32 and the 3rd electric capacity 33 respectively.First switch 35 disconnects or cuts out, and second switch 36 disconnects or closes, and preferably, the first switch 35 disconnects, and second switch 36 disconnects.First stiff end K10 of the first gauge tap is connected with the first selecting side K11, and the high pressure heart yearn of hi-line 130 is connected with the first heart yearn of the first test lead 110.Second stiff end K20 of the second gauge tap is connected with the 4th selecting side K14,3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15,5th selecting side K15 is connected by the connection wire heart yearn being connected wire 200 with the second stiff end K20 of the second gauge tap, thus the 5th selecting side K15 is connected with the 4th selecting side K14, the 4th stiff end K40 of the 4th gauge tap is connected with the 7th selecting side K17.Because the 4th selecting side K14 is connected with the first shielding box 300 shell, first shielding box 300 shell is connected with the high voltage shield of hi-line 130, when providing high pressure from hi-line 130, the current potential of high voltage shield is suitable with the current potential of high pressure heart yearn, the voltage of the second test lead 120 is consistent with the high voltage shield current potential of hi-line 130, second test lead 120 is equivalent to equipotential line, by the high pressure heart yearn of hi-line 130 for the first test lead 110 provides high pressure.Now, first test lead 110 serves as hi-line 130, second test lead 120 serves as equipotential line, first test lead 110 connects the A point in CVT between the first electric capacity 31 and the second electric capacity 32, electric capacity, the parameter such as dielectric loss and insulation resistance of shield EMC measurement first electric capacity 31 that adds high pressure by opposition method.
Please continue to refer to Fig. 5, the first test lead 110 and the second test lead 120 connect the A point between the first electric capacity 31 in CVT30 and the second electric capacity 32 and the B point position between the second electric capacity 32 and the 3rd electric capacity 33 respectively.First switch 35 disconnects or cuts out, and second switch 36 disconnects or closes, and preferably, the first switch 35 disconnects, and second switch 36 disconnects.First stiff end K10 of the first gauge tap is connected with the first selecting side K11, connect wire 200 unsettled, 3rd stiff end K30 of the 3rd gauge tap is connected with the 6th selecting side K16, thus the second heart yearn of the second test lead 120 is connected with the measurement heart yearn of slotted line 140.4th stiff end K40 of the 4th gauge tap is connected with the 8th selecting side K18, connects layer and ground connection with measuring because the 8th selecting side K18 connects, thus secondary shielding box 400 earthing of casing, its current potential is zero.First heart yearn of the first test lead 110 connects the high pressure heart yearn of hi-line 130, and for the first test lead 110 provides high pressure, the second test lead 120 connects slotted line 140.Now, the first test lead 110 serves as hi-line 130, and the second test lead 120 serves as slotted line 140, measures electric capacity, the parameter such as dielectric loss and insulation resistance of the second electric capacity 32 by positive connection.
Please continue to refer to Fig. 6, the first test lead 110 and the second test lead 120 connect the A point between the first electric capacity 31 in CVT30 and the second electric capacity 32 and the B point position between the second electric capacity 32 and the 3rd electric capacity 33 respectively.First switch 35 disconnects or cuts out, and second switch 36 is closed, and preferably, the first switch 35 disconnects.First stiff end K10 of the first gauge tap is connected with the second selecting side K12, second stiff end K20 of the second gauge tap is connected with the 3rd selecting side K13, 3rd stiff end K30 of the 3rd gauge tap is connected with the 5th selecting side K15, second stiff end K20 of the second gauge tap is connected with the 5th selecting side K15, thus the 3rd stiff end K30 of the 3rd gauge tap is connected with the second stiff end K20 of the second gauge tap, second heart yearn of the second test lead 120 connects the high pressure heart yearn of hi-line 130, 4th stiff end K40 of the 4th gauge tap is connected with the 7th selecting side K17, thus connect with the connection conductor shield being connected wire 200.By hi-line 130 high pressure heart yearn for the second test lead 120 provides high pressure, first heart yearn of the first test lead 110 is connected with the first shielding box 300 shell, the current potential of the first heart yearn of the first test lead 110 is suitable with the high voltage shield current potential of hi-line 130, and the first test lead 110 is equivalent to equipotential line.Now, the second test lead 120 serves as hi-line 130, and the first test lead 110 serves as equipotential line, measures the parameters such as the electric capacity of the 3rd electric capacity 33, dielectric loss and insulation resistance by opposition method.
In process of the test, the potential state of wire-changing device 1000 inner member of CVT high-potting is as shown in table 1.
Table 1
Each technical characteristic of above embodiment can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
Above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. a wire-changing device for CVT high-potting, is characterized in that, comprising:
First test circuit, comprises the first test lead, hi-line, the first gauge tap and the second gauge tap; Described hi-line comprises high pressure heart yearn and high voltage shield successively, the coated described high pressure heart yearn of described high voltage shield; Described first gauge tap comprises the first stiff end be connected with the first test lead, the first selecting side connecting the described high pressure heart yearn of described hi-line and the described high voltage shield of described hi-line respectively and the second selecting side; Described second gauge tap comprises and is connected the second stiff end that wire connects, the 3rd selecting side connecting the described high pressure heart yearn of described hi-line and the described high voltage shield of described hi-line respectively and the 4th selecting side with described;
Second test circuit, comprises the second test lead, slotted line and the 3rd gauge tap; Described 3rd gauge tap comprises the 3rd stiff end be connected with described second test lead, the 5th selecting side connecting described connection wire and described slotted line respectively and the 6th selecting side;
Connect wire, be connected between the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap.
2. the wire-changing device of CVT high-potting according to claim 1, is characterized in that, also comprise:
First shielding box, described first test circuit is located in described first shielding box, and described hi-line and described first test lead are each passed through described first shielding box and are in communication with the outside; The described high voltage shield of described hi-line and described first shielding box housing contacts;
Described connection wire, through described first shielding box, connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively.
3. the wire-changing device of CVT high-potting according to claim 2, it is characterized in that, described first test lead comprises the first heart yearn, the first screen layer and the first ground successively and connects layer, and described first screen layer connects between layer at described first heart yearn and described first ground; Described first screen layer and described first shielding box housing contacts, described first heart yearn is connected with described first stiff end of described first gauge tap, and described first ground connects a layer ground connection.
4. the wire-changing device of the CVT high-potting according to claims 1 to 3 any one, is characterized in that, also comprise:
Secondary shielding box, described second test circuit is located in described secondary shielding box, and described slotted line and described second test lead are each passed through described secondary shielding box and are in communication with the outside; The described secondary shielding layer of described second test lead and described secondary shielding box housing contacts;
Described second test lead comprises the second heart yearn, secondary shielding layer and the second ground successively and connects layer, and described secondary shielding layer connects between layer at described second heart yearn and described second ground; Described secondary shielding layer and described secondary shielding box housing contacts, described second heart yearn is connected with described 3rd stiff end of described 3rd gauge tap, and described second ground connects a layer ground connection;
Described connection wire, through described first shielding box and described secondary shielding box, connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively.
5. the wire-changing device of CVT high-potting according to claim 4, is characterized in that, described connection wire comprises and connects wire heart yearn and connect conductor shield, the coated described connection wire heart yearn of described connection conductor shield; Described connection wire heart yearn connects the second stiff end of described second gauge tap and the 5th selecting side of described 3rd gauge tap respectively; Described connection conductor shield and described first shielding box housing contacts, and with the noncontact of described secondary shielding box shell.
6. the wire-changing device of CVT high-potting according to claim 5, is characterized in that, the wire-changing device of described CVT high-potting also comprises the 4th gauge tap, and described slotted line comprises successively to be measured heart yearn and connect layer with measuring; Connect to described measurement the coated described measurement heart yearn of layer; Described 4th gauge tap comprises the 4th stiff end be connected with secondary shielding box shell, connect layer respectively the 7th selecting side and the 8th selecting side with connecting the described screen layer of described connection wire and the described measurement of described slotted line; Described measurement heart yearn is connected with the 6th selecting side of described 3rd switch, connects to described measurement layer and described secondary shielding box shell noncontact and ground connection.
7. the wire-changing device of CVT high-potting according to claim 1, is characterized in that, described hi-line connects layer with also comprising high pressure, and described high voltage shield connects between layer at described high pressure heart yearn and described high pressure, connects a layer ground connection described high pressure.
8. the wire-changing device of CVT high-potting according to claim 1, it is characterized in that, also comprise insulation booth, described connection wire, described first test circuit and described second test circuit are all placed in described insulation booth, and one end of one end of described first test lead, one end of described second test lead, one end of described hi-line and described slotted line is each passed through described insulation booth and is in communication with the outside.
9. a CVT high-pressure test device, is characterized in that, comprises the wire-changing device of tester and the CVT high-potting as described in claim 1 ~ 8 any one; Described first test lead of the wire-changing device of described CVT high-potting is connected with CVT to be tested respectively with described second test lead, and the described hi-line of the wire-changing device of described CVT high-potting is connected with described tester respectively with described slotted line.
10. CVT high-pressure test device according to claim 9, it is characterized in that, described tester comprises the dielectric loss measuring instrument of dielectric loss for measuring electric capacity in CVT and electric capacity parameter and the Insulation Resistance Tester for the insulation resistance parameter of measuring electric capacity in CVT.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759085A (en) * | 2016-05-10 | 2016-07-13 | 国网江苏省电力公司电力科学研究院 | Vehicle-mounted megger and dielectric loss forward and reverse connection measuring and wiring centralized conversion device |
| CN106153989A (en) * | 2016-07-26 | 2016-11-23 | 桂林电力电容器有限责任公司 | A kind of charged wire-changing device and How It Works |
| CN109387702A (en) * | 2017-08-04 | 2019-02-26 | 厦门雅迅网络股份有限公司 | A kind of capacitor polarity detection circuit and method |
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- 2015-07-22 CN CN201520539938.0U patent/CN204789832U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759085A (en) * | 2016-05-10 | 2016-07-13 | 国网江苏省电力公司电力科学研究院 | Vehicle-mounted megger and dielectric loss forward and reverse connection measuring and wiring centralized conversion device |
| CN105759085B (en) * | 2016-05-10 | 2019-06-11 | 国网江苏省电力公司电力科学研究院 | Vehicle-mounted megameter, dielectric loss just connect, conversion equipment is concentrated in dielectric loss reversal connection measurement wiring |
| CN106153989A (en) * | 2016-07-26 | 2016-11-23 | 桂林电力电容器有限责任公司 | A kind of charged wire-changing device and How It Works |
| CN106153989B (en) * | 2016-07-26 | 2022-12-06 | 桂林电力电容器有限责任公司 | Live line changing device and operation method |
| CN109387702A (en) * | 2017-08-04 | 2019-02-26 | 厦门雅迅网络股份有限公司 | A kind of capacitor polarity detection circuit and method |
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