CN203800460U - Transformer arrester combined handcart - Google PatentsTransformer arrester combined handcart Download PDF
- Publication number
- CN203800460U CN203800460U CN201420213620.9U CN201420213620U CN203800460U CN 203800460 U CN203800460 U CN 203800460U CN 201420213620 U CN201420213620 U CN 201420213620U CN 203800460 U CN203800460 U CN 203800460U
- Prior art keywords
- lightning arrester
- voltage transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- 238000004804 winding Methods 0.000 claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 230000001012 protector Effects 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 19
- 239000012212 insulators Substances 0.000 claims description 8
- 230000001131 transforming Effects 0.000 abstract description 4
- 241000191891 Tulipa hybrid cultivar Species 0.000 abstract 2
- 239000000203 mixtures Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metals Substances 0.000 description 3
- 229910052751 metals Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000008264 clouds Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000006243 chemical reactions Methods 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
The utility model discloses a transformer arrester combined handcart, which comprises a voltage transformer, an arrester, a grounding part, a primary electrical part and an operation control and instrument panel fixed on the handcart. The voltage transformer comprises a primary winding and a secondary winding; the arrester comprises a flash-grounding device, a down lead and a grounding body; the primary electrical part comprises an insulated base, a connection copper busbar, an insulated contact arm, a fuse and a tulip contact, the fuse is arranged inside the insulated contact arm and is connected with the primary winding of the voltage transformer via the connection copper busbar, and the tulip contact at the front end of the insulated contact arm is connected with the flash-grounding device of the arrester. The secondary winding of the voltage transformer is grounded, or is connected with a measurement instrument or connected with a relay protector. The grounding body of the arrester is grounded. The arrester and the voltage transformer are combined to be arranged inside a switch cabinet, lightning strike can be avoided, overvoltage protection can be provided, and power transformation is safe. The fuse which is a device for protecting the voltage transformer set is arranged inside the insulated contact arm, and splashing of broken pieces when the fuse is burst can be prevented.
The utility model relates to the ac metal closing switch gear of electric power system, is specifically the instrument transformer lightning arrester combination handcart in a kind of 40.5kV of being used in alternating-current switch equipment.
In switchgear, the function of handcart is for electric power system secondary line provides low voltage signal, completes protection or measurement function.By the structure of multiple functional combination handcart reasonable reformation in addition, can greatly reduce the structure space of switch cubicle.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of instrument transformer lightning arrester combination handcart, compact conformation, be arranged in ac metal closing switch gear, can, on the basis of realizing its basic function, greatly save the inner space of switch cubicle, the volume of switch cubicle is reduced.
For achieving the above object, the utility model is taked following technical scheme: a kind of instrument transformer lightning arrester combination handcart, comprise voltage transformer, lightning arrester, grounded part, electric part, manipulation and an instrument face plate, and form an entirety and be fixed on vehicle frame; Wherein, voltage transformer comprises winding and secondary winding, lightning arrester comprises arrester, connects downlead, earth electrode, one time electric part comprises insulator foot, connection copper bar, insulation contact arm, fuse, Mume flower contact, fuse is arranged on insulation contact arm inside, be connected with a winding of voltage transformer by connecting copper bar, the Mume flower contact of insulation contact arm front end is connected with the arrester of lightning arrester.
The secondary winding of voltage transformer or ground connection, or connect measuring instrument, or succeed non-electricity protector, take wherein a kind of form; The earth electrode of lightning arrester connects grounded part.
Bottom of frame is with handcart wheel and front jockey wheel, is provided with car door and valve depression bar before vehicle frame, manipulation and instrument face plate be fixed on car door homonymy position on.
Insulation contact arm is arranged on insulator foot, and insulator foot is fixed on manipulation and instrument face plate.
On manipulation and instrument face plate, be provided with operating axis handle, panel board, nameplate, counter and secondary plug.
Voltage transformer is electromagnetic type, or electronic type, or photoelectric type.
The arrester of lightning arrester is one of lightning rod, lightning conducter, lighting proof strip, lightning conduction form.
The utility model is owing to taking above technical scheme, and it has the following advantages: 1, the utility model high safety, lightning arrester is contained in an electrical system, and can avoid thunderbolt, protection metal exchanges the power transformation safety of looped network switch apparatus.Again voltage transformer is combined in an electrical system, at will transformation, can avoid again overvoltage calcination instrument and accidentally injure operating personnel.2, fuse explosion the protection device-fuse of voltage transformer group is arranged on to portion in insulation contact arm, once can prevent that fragment from splashing.3, lightning arrester and voltage transformer are installed on same handcart, and convenient maintenance is safer.4, make the complete property of looped network switch apparatus strong, volume is little, without burning and explosion hazard, there is reliably " five is anti-" function.
Brief description of the drawings
Fig. 1 is the sectional view of the utility model combination handcart.
Fig. 2 is the front view of the utility model combination handcart.
Below in conjunction with drawings and Examples, the utility model is described in detail.
The function of handcart is for electric power system secondary line provides low voltage signal, completes protection or measurement function, especially includes once the combination handcart of electric, lightning arrester and voltage transformer, has more the function of voltage protection and lightning strike protection.
The lightning protection effect of lightning arrester is that it can be guided lightning own into and leak into the earth by itself safely from protection thing top, and therefore, it draws thunder performance and earial drainage performance is vital.The lightning arrester of direct striking thunder prevention electricity is generally made up of three parts, i.e. arrester, downlead and earth electrode; Arrester is divided into again lightning rod, lightning conducter, lighting proof strip, lightning conduction.Thunder-lightning principle using lightning rod as arrester is: lightning rod accesses underground by wire, forms equal potential difference with ground, utilizes the height of self, and the thunder and lightning cloud electric field that makes electric field strength be increased to limiting value distorts, and starts ionization descending pilot discharge; Lightning rod produces point discharge under highfield effect, forms upwards pilot discharge; Both join and form thunder and lightning path, leak into the earth thereupon, reach lightning-arrest effect.
Lightning arrester high voltage in proportion relation transformation become 100V or more low-grade standard secondary voltage, for protection, metering, metering device.Meanwhile, use voltage transformer high voltage and electrician can be isolated.Voltage transformer is the indispensable a kind of electrical equipment of the transmission of electricity such as power plant, electric substation and electric power system.
Voltage transformer and transformer are very alike, are all for the voltage on conversion line.Voltage transformer is the transformer of a ribbon core.It is mainly made up of first and second winding, iron core and insulation, and two windings are all contained in or on iron core, between two windings and between winding and iron core, have insulation, and making has electric isolation between two windings and between winding and iron core.When apply a voltage on a winding time, in iron core, just produce a magnetic flux, according to the law of electromagnetic induction, in secondary winding, just produce a secondary voltage.Change once or the number of turn of secondary winding, can produce different primary voltages and secondary voltage ratio, this just can form not voltage transformer on year-on-year basis.Voltage transformer converts high voltage to low-voltage, i.e. 100V in proportion.Winding parallel of voltage transformer (the line potential circuit of electric power system) secondary winding on primary system connects measuring instrument, relay etc.Therefore in the time of the voltage of measuring on high-tension line, although primary voltage is very high, secondary is low, can guarantee the safety of operating personnel and instrument.Voltage transformer is mainly electromagnetic type (capacitance type potential transformer is widely used), separately have non electromagnetic, as electronic type or photoelectric type.
The impedance of voltage transformer itself is very little, once secondary (secondary winding) is short-circuited, coil is burnt in sharp increase by electric current.For this reason, the former limit of voltage transformer (winding) need to connect fuse, secondary reliable ground, in order to avoid former secondary when damage insulation, there is over the ground high potential and cause the person and equipment breakdown in secondary.
Therefore, the handcart that the utility model provides, as shown in Figure 1, 2, has comprised voltage transformer 1, lightning arrester 2,3, electric parts 4 of grounded part, manipulation and instrument face plate 5 and vehicle frame 6.Wherein voltage transformer 1, lightning arrester 2, grounded part 3, electric part 4 and manipulation and instrument face plate 5 form an entirety, integrated being fixed on the vehicle frame 6 of bottom with handcart wheel 61 and front jockey wheel 62.Be provided with car door 63 and valve depression bar 64 above at vehicle frame 6, manipulation and instrument face plate 5 be fixed on car door homonymy position on, on manipulation and instrument face plate 5, be provided with operating axis handle 51, panel board 52, nameplate 53, counter 54 and secondary plug 55.
One time electric part 4 comprises insulator foot 41, connection copper bar 42, insulation contact arm 43, fuse 44, Mume flower contact 45.Insulation contact arm 43 is arranged on insulator foot 41, and insulating base is fixed on manipulation and instrument face plate 5; Fuse 44 is arranged on insulation contact arm 43 inside; What be electrically connected with fuse 44 is connected copper bar 42, and the other end is connected on voltage transformer 1; Insulation contact arm 43 front ends connect Mume flower contact 45; The arrester that lightning arrester 2 comprises is connected on Mume flower contact 45.Lightning arrester 2 also includes downlead 22 and earth electrode 23, and arrester 21 connects downlead, and downlead connects earth electrode, and earth electrode is fixed on vehicle frame 6, is connected with grounded part 3.Voltage transformer 1 is fixed on vehicle frame 6 by transducer bracket 11, and a winding of voltage transformer 1 12 connects copper bars 42, connect with fuse 44 electricity by connecting copper bar 42, and secondary winding 13 reliable grounds or connect measuring instrument, or succeed non-electricity protector.Voltage transformer is mainly electromagnetic type, or electronic type, or photoelectric type.
As above-mentioned, the fuse 44 of protection voltage transformer is arranged on insulation contact arm 43 inside, in the time of voltage transformer overtension, once fuse 44 explosions can be exploded in insulation contact arm 43 inside, can prevent that fragment from splashing, and Accident prevention expands.
The combination handcart of lightning arrester and voltage transformer, wherein lightning arrester can be guided lightning own into and leak into the earth by oneself safely from protection thing top.The arrester of lightning arrester is divided into lightning rod, lightning conducter, lighting proof strip, lightning conduction.The most common with lightning rod.Lightning rod accesses underground by wire, form equal potential difference with ground, utilizes the height of self, and the thunder and lightning cloud electric field that makes electric field strength be increased to limiting value distorts, and starts ionization descending pilot discharge; Lightning rod produces point discharge under highfield effect, forms upwards pilot discharge; Both join and form thunder and lightning path, leak into the earth thereupon, reach lightning-arrest effect.Once voltage transformer secondary winding is short-circuited, the fuse that winding connects will fuse at once, protect one time electric part, in order to avoid the insulation of former and deputy limit is while damaging, secondary occurs over the ground high potential and causes the person and equipment breakdown.Lightning arrester and voltage transformer are installed on same handcart, and convenient maintenance is safer.Under regular service conditions, do not need maintenance in 10～20 years, but because users' environment for use condition difference is very large, thereby conventionally still need to do necessary inspection, maintenance work.This handcart is used in 40.5kV alternating-current switch equipment, for electric power system secondary line provides low voltage signal, has realized protection or measurement function.
1. an instrument transformer lightning arrester combination handcart, it is characterized in that: comprise voltage transformer (1), lightning arrester (2), grounded part (3), an electric part (4), manipulation and instrument face plate (5), structure is in aggregates to be fixed on vehicle frame (6); Wherein,
Voltage transformer (1) comprises a winding (12) and secondary winding (13),
Lightning arrester (2) comprises arrester (21), downlead (22), earth electrode (23),
An electric part (4) comprises insulator foot (41), connection copper bar (42), insulation contact arm (43), fuse (44), Mume flower contact (45), fuse (44) is arranged on insulation contact arm (43) inside, be connected with a winding (12) of voltage transformer (1) by connecting copper bar (42), the Mume flower contact (45) of insulation contact arm (43) front end is connected with the arrester (21) of lightning arrester (2).
2. instrument transformer lightning arrester combination handcart according to claim 1, is characterized in that: secondary winding (13) or the ground connection of voltage transformer (1), or connect measuring instrument, or succeed non-electricity protector, take wherein a kind of form; The earth electrode (23) of lightning arrester (2) connects grounded part (3).
3. instrument transformer lightning arrester combination handcart according to claim 1, it is characterized in that: vehicle frame (6) bottom is with handcart wheel (61) and front jockey wheel (62), before vehicle frame, be provided with car door (63) and valve depression bar (64), manipulation and instrument face plate (5) be fixed on car door homonymy position on.
4. instrument transformer lightning arrester combination handcart according to claim 1, it is characterized in that: it is upper that insulation contact arm (43) is arranged on insulator foot (41), insulator foot (41) is fixed on manipulation and instrument face plate (5).
5. according to the instrument transformer lightning arrester combination handcart described in claim 1 or 3 or 4, it is characterized in that: on manipulation and instrument face plate (5), be provided with operating axis handle (51), panel board (52), nameplate (53), counter (54) and secondary plug (55).
6. according to the instrument transformer lightning arrester combination handcart described in claim 1 or 3 or 4, it is characterized in that: voltage transformer (1) is electromagnetic type, or electronic type, or photoelectric type.
7. instrument transformer lightning arrester combination handcart according to claim 1, is characterized in that: the arrester (21) of lightning arrester (2) is one of lightning rod, lightning conducter, lighting proof strip, lightning conduction form.
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CN201420213620.9U CN203800460U (en)||2014-04-28||2014-04-28||Transformer arrester combined handcart|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CN201420213620.9U CN203800460U (en)||2014-04-28||2014-04-28||Transformer arrester combined handcart|
|Publication Number||Publication Date|
|CN203800460U true CN203800460U (en)||2014-08-27|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CN201420213620.9U Active CN203800460U (en)||2014-04-28||2014-04-28||Transformer arrester combined handcart|
Country Status (1)
|CN (1)||CN203800460U (en)|
- 2014-04-28 CN CN201420213620.9U patent/CN203800460U/en active Active
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|C14||Grant of patent or utility model|