CN201435303Y

CN201435303Y - Outdoor high-voltage zero-sequence current transformer

Info

Publication number: CN201435303Y
Application number: CN2009201855641U
Authority: CN
Inventors: 马云涌; 黄建平; 穆秋月; 孙兴忱; 刘磊; 李海飞; 刘宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-23
Filing date: 2009-06-23
Publication date: 2010-03-31
Anticipated expiration: 2019-06-23

Abstract

The utility model discloses an outdoor high-voltage zero-sequence current transformer, comprising a transformer ring body, wherein the middle part of the transformer ring body is processed with a hollow cavity. The outdoor high-voltage zero-sequence current transformer is characterized in that the two ends of the transformer ring body are respectively fixed with an A-phase cylinder and a C-phase cylinder; the middle parts of the A-phase cylinder and the C-phase cylinder are respectively provided with an A-phase one-time lead-out wire perforation and a C-phase one-time lead-out wire perforationwhich are axially penetrated; the middle parts of the A-phase cylinder, the transformer ring body and the C-phase cylinder are provided with a ring-shaped zero-sequence current transformer iron coreenclosed by an outer insulating layer and an inner insulating layer; the rear ends of the A-phase cylinder and the C-phase cylinder are respectively provided with an A-phase protecting current transformer iron core and a C-phase protecting current transformer iron core which are enclosed by the outer insulating layer and the inner insulating layer and are externally wound with protecting current transformer secondary coils; and an A-phase insulating wire-leading cylinder and a C-phase insulating wire-leading cylinder are respectively fixed below the A-phase cylinder and the C-phase cylinder. The outer insulating layer and the inner insulating layer separate primary coils from the secondary coils. The outdoor high-voltage zero-sequence current transformer has the advantages of being applicable to outdoor and having simple and convenient wiring.

Description

The outdoor high-voltage zero sequence current mutual inductor

Technical field

The utility model relates to power equipment, especially relates to a kind of outdoor high-voltage zero sequence current mutual inductor.

Background content

At present, the zero sequence current mutual inductor that in electric power system, uses, complex structure, wiring complexity and unreasonable structure, and also all zero sequence current mutual inductors can only be used for indoorly, can not be used for the open air.

Summary of the invention

The purpose of this utility model is to provide a kind of open air, wiring outdoor high-voltage zero sequence current mutual inductor simply and easily that is applicable to.

The purpose of this utility model is achieved in that the utility model comprises the instrument transformer ring body, centre at the instrument transformer ring body is processed with cavity, feature is to be fixed with the A phase cylindrical shell that is connected as a single entity and C cylindrical shell mutually respectively at the two ends of instrument transformer ring body, be processed with an A lead-out wire perforation mutually that axially runs through in the centre of A phase cylindrical shell, be processed with a C lead-out wire perforation mutually that axially runs through in the centre of C phase cylindrical shell, in A phase cylindrical shell, be equipped with external insulation layer and inner insulating layer in the cylindrical shell mutually with C in the instrument transformer ring body, middle part at A phase cylindrical shell, the instrument transformer ring body is provided with the lead-out wire perforation mutually around A in the middle part of cylindrical shell mutually with C, cavity and C be a lead-out wire perforation three mutually, and by the annular zero sequence current mutual inductor iron core of external insulation layer and inner insulating layer encirclement, be provided with the A that surrounded by external insulation layer and inner insulating layer protective current transformer iron core mutually in the rear end of A phase cylindrical shell, be around with A phase protective current instrument transformer secondary coil at A phase protective current transformer iron core, be provided with the C that surrounded by external insulation layer and inner insulating layer protective current transformer iron core mutually in the rear end of C phase cylindrical shell, be around with C phase protective current instrument transformer secondary coil at C phase protective current transformer iron core, on the instrument transformer ring body, the below of cavity is provided with and is surrounded by external insulation layer and inner insulating layer and around annular zero sequence current mutual inductor iron core, a zero sequence current mutual inductor secondary coil; Be hollow A phase insulator pin tube in the middle of below A phase cylindrical shell, being fixed with, in the middle of below C phase cylindrical shell, being fixed with for hollow C phase insulator pin tube, A phase insulator pin tube and C mutually the lower end sidewall of insulator pin tube all be processed with the external screw thread that is used for fixing.

A phase cylindrical shell and C mutually the front end of cylindrical shell be equipped with dead ring.

On A phase cylindrical shell, be provided with plural A phase protective current instrument transformer secondary coil, on C phase cylindrical shell, be provided with plural C phase protective current instrument transformer secondary coil.

The utility model is by the instrument transformer ring body; A phase cylindrical shell; A phase insulator pin tube; C phase cylindrical shell and C insulator pin tube mutually form; be processed with A a lead-out wire perforation and a C lead-out wire perforation mutually mutually respectively on the cylindrical shell at A phase cylindrical shell mutually with C; a lead-out wire perforation of A phase is used for the output wiring terminal of A phase outdoor high-voltage vacuum breaker; a lead-out wire perforation of C phase is used for the output wiring terminal of C phase outdoor high-voltage vacuum breaker; external insulation layer and inner insulating layer will from A mutually a lead-out wire perforation and C mutually lead-out wire bore a hole the primary winding that runs through and A mutually; C phase protective current instrument transformer secondary coil is isolated mutually; this simple in structure, having overcome in the past, zero sequence current mutual inductor can not be used for outdoor characteristics.Be respectively equipped with A phase, C phase protective current instrument transformer in the rear end of cylindrical shell at A phase cylindrical shell mutually with C, and be positioned at the back of zero sequence current mutual inductor, and kept apart with insulating barrier between protective current instrument transformer and the zero sequence current mutual inductor.Owing to the protective current instrument transformer is arranged, so the outdoor high-voltage zero sequence current mutual inductor has short-circuit protection function.Zero sequence current mutual inductor secondary coil on the instrument transformer ring body can be one or more, consistent on protective current instrument transformer and the market, and promptly its secondary coil has a plurality of generally speaking.The lead-out wire of A phase protective current instrument transformer secondary coil and zero sequence current mutual inductor from A mutually the insulator pin tube draw, the lead-out wire of C phase protective current instrument transformer secondary coil is drawn from C phase insulator pin tube, thereby very convenient in the process of using.External insulation layer and inner insulating layer all are to be made by the epoxy resin that plays insulating effect.Therefore, the utlity model has and be applicable to open air, wiring advantage simply and easily.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 for A-A among Fig. 1 to partly cut open schematic diagram;

Fig. 3 be among Fig. 2 B-B to generalized section;

Fig. 4 be among Fig. 2 C-C to generalized section;

Fig. 5 be among Fig. 2 D-D to generalized section.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

The utility model comprises instrument transformer ring body 5, be processed with cavity 4 in the centre of instrument transformer ring body 5, be fixed with the A phase cylindrical shell 1 that is connected as a single entity and C cylindrical shell 7 mutually respectively at the two ends of instrument transformer ring body 5, be processed with an A lead-out wire perforation 2 mutually that axially runs through in the centre of A phase cylindrical shell 1, be processed with a C lead-out wire perforation 8 mutually that axially runs through in the centre of C phase cylindrical shell 7, in A phase cylindrical shell 1, be equipped with external insulation layer 10 and inner insulating layer 14 in the cylindrical shell 7 mutually with C in the instrument transformer ring body 5, middle part at A phase cylindrical shell 1, the middle part of instrument transformer ring body 5 and C mutually simplified 7 is provided with the lead-out wire perforation 2 mutually around A, cavity 4 and C be a lead-out wire 8 threes that bore a hole mutually, and by the annular zero sequence current mutual inductor iron core 17 of external insulation layer 10 and inner insulating layer 14 encirclements, be provided with protective current transformer iron core 11 mutually by the A of external insulation layer 10 and inner insulating layer 14 in the rear end of A phase cylindrical shell 1, be around with A phase protective current instrument transformer secondary coil 12 at A phase protective current transformer iron core 11, be provided with the C that surrounded by external insulation layer 10 and inner insulating layer 14 protective current transformer iron core 15 mutually in the rear end of C phase cylindrical shell 7, be around with C phase protective current instrument transformer secondary coil 16 at C phase protective current transformer iron core 15, on instrument transformer ring body 5, the below of cavity 4 is provided with one and is surrounded by external insulation layer 10 and inner insulating layer 14 and around the zero sequence current mutual inductor secondary coil 18 of annular zero sequence current mutual inductor iron core 17; Be hollow A phase insulator pin tube 3 in the middle of below A phase cylindrical shell 1, being fixed with, in the middle of below C phase cylindrical shell 7, being fixed with for hollow C phase insulator pin tube 9, A phase insulator pin tube 3 and C mutually the lower end sidewall of insulator pin tube 9 all be processed with the external screw thread 6 that is used for fixing.

A phase cylindrical shell 1 and C mutually the front end of cylindrical shell 7 be equipped with dead ring 13.

A phase protective current transformer iron core 11 at A phase cylindrical shell 1 is around with plural A phase protective current instrument transformer secondary coil 12, is around with plural C phase protective current instrument transformer secondary coil 16 at the C phase protective current transformer iron core 15 of C phase cylindrical shell 7.

Claims

1, a kind of outdoor high-voltage zero sequence current mutual inductor, comprise instrument transformer ring body (5), be processed with cavity (4) in the centre of instrument transformer ring body (5), it is characterized in that: be fixed with the A phase cylindrical shell (1) that is connected as a single entity and C cylindrical shell (7) mutually respectively at the two ends of instrument transformer ring body (5), be processed with an A lead-out wire perforation (2) mutually that axially runs through in the centre of A phase cylindrical shell (1), be processed with a C lead-out wire perforation (8) mutually that axially runs through in the centre of C phase cylindrical shell (7), in A phase cylindrical shell (1), be equipped with external insulation layer (10) and inner insulating layer (14) in the cylindrical shell (7) mutually with C in the instrument transformer ring body (5), middle part at A phase cylindrical shell (1), instrument transformer ring body (5) is provided with the lead-out wire perforation (2) mutually around A in the middle part of cylindrical shell (7) mutually with C, cavity (4) and C be lead-out wire perforation (a 8) three mutually, and by the annular zero sequence current mutual inductor iron core (17) of external insulation layer (10) and inner insulating layer (14) encirclement, be provided with protective current transformer iron core (11) mutually by the A of external insulation layer (10) and inner insulating layer (14) in the rear end of A phase cylindrical shell (1), be around with A phase protective current instrument transformer secondary coil (12) at A phase protective current transformer iron core (11), be provided with the C that surrounded by external insulation layer (10) and inner insulating layer (14) protective current transformer iron core (15) mutually in the rear end of C phase cylindrical shell (7), be around with C phase protective current instrument transformer secondary coil (16) at C phase protective current transformer iron core (15), on instrument transformer ring body (5), the below of cavity (4) is provided with one and is surrounded by external insulation layer (10) and inner insulating layer (14) and around the zero sequence current mutual inductor secondary coil (18) of annular zero sequence current mutual inductor iron core (17); Be fixed with the middle hollow A phase insulator pin tube (3) that is in the below of A phase cylindrical shell (1), be hollow C phase insulator pin tube (9) in the middle of being fixed with in the below of C phase cylindrical shell (7), A phase insulator pin tube (3) and C mutually the lower end sidewall of insulator pin tube (9) all be processed with the external screw thread (6) that is used for fixing.

2, outdoor high-voltage zero sequence current mutual inductor as claimed in claim 1 is characterized in that: A phase cylindrical shell (1) and C mutually the front end of cylindrical shell (7) be equipped with dead ring (13).

3, outdoor high-voltage zero sequence current mutual inductor as claimed in claim 1; it is characterized in that: the A phase protective current transformer iron core (11) at A phase cylindrical shell (1) is around with plural A phase protective current instrument transformer secondary coil (12), is around with plural C phase protective current instrument transformer secondary coil (16) at the C phase protective current transformer iron core (15) of C phase cylindrical shell (7).