Contact boxlike current transformer screening arrangement
Technical field
The present invention relates to a kind of screening arrangement that is used for contact boxlike current transformer.
Background technology
High-tension switch cabinet is used for electric power system generating, transmission of electricity, distribution, electric energy conversion and consumes, and it plays effects such as break-make, control or protection.Current transformer is electric elements commonly used in the high-tension switch cabinet.And contact boxlike current transformer is meant that an end of a high-pressure side is the contact box form.Can produce the discharge problem around the fixed contact of existing contact boxlike current transformer, reduce the performance of current transformer, improve office and put.
Summary of the invention
The screening arrangement that the purpose of this invention is to provide the problem of discharging around a kind of fixed contact that solves contact boxlike current transformer.
In order to achieve the above object; Technical scheme of the present invention has provided a kind of contact boxlike current transformer screening arrangement; Comprise high-tension shielding structure and low pressure shielding construction, the high-tension shielding structure is fixed on the fixed contact of contact boxlike current transformer, and the low pressure shielding construction is fixed on the secondary coil support of contact boxlike current transformer; The low pressure shielding construction links to each other with ground; It is characterized in that: the difference in height △ H=35~45mm between high-tension shielding structure and the low pressure shielding construction, the height H 1=90 of high-tension shielding structure~100mm, the height H 2=35 of low pressure shielding construction~45mm.
Preferably; Said high-tension shielding structure comprises retainer ring and the circle copper ring that is positioned at top and below; Between retainer ring and circle copper ring, be fixed with at least five first vertical copper rods; The two ends up and down of the first cylindric copper mesh are separately fixed on retainer ring and the circle copper ring, on the circle copper ring, are fixed with a circular spiral body, and the distance between retainer ring and the circle copper ring is the height H 1 of said high-tension shielding structure.
Preferably; Said low pressure shielding construction comprises ring, on ring, is provided with at least five second vertical copper rods, and the second cylindric copper mesh covers the surface of ring and fixes with ring; On second copper rod and the second cylindric copper mesh, be fixed with the epoxy fixed block; Fixedly an end and the ring of iron wire fix, and the other end is provided with nut, and the height of ring is the height H 2 of said low pressure shielding construction.
A kind of screening arrangement provided by the invention has solved discharge problem around the fixed contact of contact boxlike current transformer, has improved the performance of current transformer, has reduced office and has put.
Description of drawings
Fig. 1 is a kind of contact boxlike current transformer screening arrangement general structure sketch map provided by the invention;
Fig. 2 A is the vertical view of high-tension shielding structure;
Fig. 2 B is the side sectional view of high-tension shielding structure;
Fig. 3 A is the vertical view of low pressure shielding construction;
Fig. 3 B is the side sectional view of low pressure shielding construction.
Embodiment
For making the present invention more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
As shown in Figure 1; A kind of contact boxlike current transformer screening arrangement provided by the invention comprises high-tension shielding structure 1 and low pressure shielding construction 2, high-tension shielding structure 1 is fixed on the fixed contact of contact boxlike current transformer; Adjust distance; Low pressure shielding construction 2 is being fixed on the secondary coil support of contact boxlike current transformer, and low pressure shielding construction 2 links to each other with ground, the difference in height △ H=35~45mm between high-tension shielding structure 1 and the low pressure shielding construction 2; In the present embodiment, difference in height △ H is taken as 40mm
Shown in Fig. 2 A and Fig. 2 B, high-tension shielding structure 1 comprises retainer ring 1-4 and the circle copper ring 1-1 that is positioned at top and below, many first vertical copper rod 1-2 of welding between retainer ring 1-4 and circle copper ring 1-1.The copper mesh that to cut out again is rolled into the first cylindric copper mesh 1-3 on wooden roller; With the two ends up and down of the first cylindric copper mesh 1-3 respectively flanging be welded on retainer ring 1-4 and the circle copper ring 1-1; Welding one circular spiral body 1-5 on circle copper ring 1-1; Distance between retainer ring 1-4 and the circle copper ring 1-1 is height H 1=90~100mm of said high-tension shielding structure 1, and in the present embodiment, height H 1 is taken as 95mm.
Shown in Fig. 3 A and Fig. 3 B; Low pressure shielding construction 2 comprises ring 2-3; Many second vertical copper rod 2-5 of welding on ring 2-3; The second cylindric copper mesh 2-4 covers the surface of ring 2-3 and fixes with ring 2-3 welding, on the second copper rod 2-5 and the second cylindric copper mesh 2-4, is fixed with epoxy fixed block 2-6.Fixedly during epoxy fixed block 2-6; With mixture of epoxy resins epoxy fixed block 2-6 is bonded on the second copper rod 2-5 and the second cylindric copper mesh 2-4 earlier; After air-heater blows two minutes initial solidifications again, be put into baking curing in about 10 hours in 120 ℃~130 ℃ baking ovens.Fixedly the end of iron wire 2-2 fixes with ring 2-3, and the other end is provided with nut 2-1, and the height of ring 2-3 is height H 2=35~45mm of low pressure shielding construction 2, and in the present embodiment, height H 2 is taken as 40mm.