JPH0350313U

JPH0350313U -

Info

Publication number: JPH0350313U
Application number: JP11112889U
Authority: JP
Priority date: 1989-09-22
Filing date: 1989-09-22
Publication date: 1991-05-16
Anticipated expiration: 2004-09-22
Also published as: JP2514075Y2

Description

[Brief explanation of the drawing]

図面第１図ないし第７図は本考案の実施例を示
すもので、第１図は一対のモールドケースの中空
部に分割型コアを挿入した状態の断面図、第２図
は一対のモールドケースの中空部から分割型コア
を取外した状態の断面図、第３図は第２図のＡ−
Ａ線断面図、第４図は一対のモールドケースにア
ームを結合した状態の側面図、第５図は上記アー
ムの操作によつて変流器が開かれた状態を示す図
、第６図は変流器の窓孔に静電塗料塗布面を設け
た状態の断面図、第７図は静電塗料塗布面を設け
たモールドケースの分割面を示す図、第８図は従
来の高圧用分割型変流器の一例を示す断面図、第
９図は同変流器の別の例を示す図、第１０図は同
変流器においてコロナ放電の発生を説明する図で
ある。２１……分割型変流器、２２……窓孔、２３，
２４……分割型モールドケース、２５，２６……
分割型コア、２７，２８……中空部、２９，３０
……コイル、３１，３２……アーム、３７，３８
……リード線、３９，４１……静電塗料塗布接触
面。 Drawings 1 to 7 show embodiments of the present invention, in which Fig. 1 is a sectional view of a split core inserted into the hollow portion of a pair of molded cases, and Fig. 2 is a sectional view of a pair of molded cases. A cross-sectional view of the split core removed from the hollow part, Figure 3 is A- in Figure 2.
4 is a side view of the arm coupled to the pair of molded cases, FIG. 5 is a diagram showing the current transformer opened by operating the arms, and FIG. 6 is a sectional view taken along line A. A cross-sectional view of a current transformer with an electrostatic paint coating surface provided on the window hole, Figure 7 is a diagram showing the divided surface of a molded case with an electrostatic paint coating surface provided, and Figure 8 is a conventional high voltage division. FIG. 9 is a cross-sectional view showing an example of the type current transformer, FIG. 9 is a view showing another example of the same current transformer, and FIG. 10 is a view illustrating the occurrence of corona discharge in the same current transformer. 21... split type current transformer, 22... window hole, 23,
24...Divided mold case, 25, 26...
Split core, 27, 28...Hollow part, 29, 30
... Coil, 31, 32 ... Arm, 37, 38
... Lead wire, 39, 41 ... Electrostatic paint application contact surface.

Claims

[Scope of utility model registration request]

In a split type current transformer installed in a high-voltage electrical circuit, a pair of split mold cases molded to form the window holes of the current transformer have a hollow part into which a split core is inserted, and the split core is wrapped around the pair of split mold cases. The coil is buried within the wall thickness of the pair of molded cases mentioned above,
The pair of molded cases is connected to one end of a pair of arms, one of which is joined to the other arm so that it slides against the other arm in the direction of opening and closing the pair of molded cases. Lead wires connected to the coils are passed through each arm and pulled out from the other end of each arm, and static electricity is created between the inner surfaces of the window holes of the pair of molded cases and the abutting ends of the split core. A high-voltage split current transformer characterized by having a contact surface made of a high-resistance material such as paint.