CN204720328U

CN204720328U - On-load shunting switch with bridge connection

Info

Publication number: CN204720328U
Application number: CN201520339560.XU
Authority: CN
Inventors: 张玉强; 范京明; 刘洋
Original assignee: BEIJING HUATIAN ELECTROMECHANICAL INSTITUTE Co Ltd
Current assignee: BEIJING HUATIAN ELECTROMECHANICAL INSTITUTE Co Ltd
Priority date: 2015-05-25
Filing date: 2015-05-25
Publication date: 2015-10-21
Anticipated expiration: 2025-05-25

Abstract

The utility model relates to a kind of on-load shunting switch with bridge connection, belongs to electric switch type technical field.Mainly comprise: transposer 1, frame 2, driving mechanism 3.Every phase main switch K1, auxiliary switch K2, transition resistance R, odd number initiatively contact A1, even numbers initiatively contact A2, the secondary moving contact B1 of odd number, the secondary moving contact B2 of even numbers can be housed in the transposer 1 of bidirectional-movement; Frame is often equipped with n fixed contact J, n >=3 mutually; By main switch K1, odd number, initiatively contact A1, even numbers active contact A2 and corresponding fixed contact J are electrically connected the odd number section coil of transformer and even numbers section coil; And then realize the bridge joint of transformer coil, meet the needs of middle part bridge joint voltage regulating transformer structure.Main switch K1, auxiliary switch K2 can be vacuum interrupters, also can be electronic switches.During work transposer 1 under the effect of driving mechanism 3 by setup program changing-over to need fixed contact J on, the level of auxiliary switch K2, transition resistance R and secondary moving contact B limiting transformer coil asks circulating current, complete the circuit conversion in not power-off bringing onto load situation, meet the requirement of middle part bridge joint voltage regulating transformer.

Description

On-load shunting switch with bridge connection

Technical field

The utility model provides a kind of transformer on-load shunting switch with bridge connection (hereinafter referred to as loaded switch), belongs to electric switch type technical field.

Background technology

At present, known vacuum loaded switch is generally combined structure, as ZL96215283.8 dry type vacuum load dividing intermediate voltage-regulating switch, ZL96240058.0 middle part voltage regulating dry vacuum on-load operation switch device, ZL96241045.4 on-load shunting switch with bridge connection; Compound vacuum loaded switch is every at least to be needed with three vacuum tubes mutually, and the complexity of above-mentioned bridge connected vacuum loaded switch structure, cost is high, volume is larger.

Summary of the invention

The utility model overcomes the above-mentioned shortcoming of prior art, and every phase transposer only needs two switches (vacuum interrupter or electronic switch), at least two group moving contacts, and structure is simple, reduces cost of goods manufactured, reduces the volume of product.

The utility model both may be used for compound loaded switch, also may be used for combined loaded switch.

The purpose of this utility model is achieved in that on load tap changer comprises transposer 1, frame 2 and driving mechanism 3.The transposer 1 of every phase mainly comprises main switch K1, auxiliary switch K2, transition resistance R, initiatively contact A, secondary moving contact B; Every phase n fixed contact J in frame 2, n >=3; Transposer 1 can bidirectional-movement under the effect of driving mechanism 3, receiving transposition instruction rear drive mechanism 3 when driving mechanism 3 drives transposer 1 to step to assigned address, transposer 1 makes circuit from a service position by the program of setting in course of action---as J1, J2 position is transformed into another service position---and as J2, J3 position, realize the circuit conversion in not power-off bringing onto load situation, the output voltage of adjustment transformer, control power supply quality, meet the electricity consumption requirement of user.

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation of the present utility model; Under normality, main switch K1, auxiliary switch K2 are in closure state.

Fig. 2 is another kind of structural representation of the present utility model; Under normality, closed, the auxiliary switch K2 of main switch K1 disconnects.

Fig. 3 is the transposition program diagram of Fig. 1.

Fig. 4 is the structural representation of the present utility model of controllable silicon electronic switch composition.

Fig. 5 is the structural representation of the present utility model of IGBT electronic switch composition.

One of three-phase structure phase is only drawn in figure.

Embodiment

See accompanying drawing, the utility model mainly comprises transposer 1, frame 2 and driving mechanism 3.Transposer 1 mainly comprises main switch K1, auxiliary switch K2, transition resistance R, odd number initiatively contact A1, even numbers initiatively contact A2, the secondary moving contact B1 of odd number, the secondary moving contact B2 of even numbers; Every phase n fixed contact J in frame 2, n >=3; Transposer 1 can bidirectional-movement under the effect of driving mechanism 3.Under normality, initiatively contact A1, the secondary moving contact B1 of odd number and even numbers active contact A2, the secondary moving contact B2 of even numbers contact with corresponding fixed contact J odd number.Each tap of transformer odd number section coil and even numbers section coil is electrically connected with corresponding fixed contact J, fixed contact J1, J3 ... have potential difference between Jn-1, same J2, J4 ... also potential difference is had between Jn.

Position as depicted in figure 3 a during work, load current is by fixed contact J1, odd number initiatively contact A1, main switch K1, even numbers initiatively contact A2, fixed contact J2.

During circuit conversion, driving mechanism 3 drives transposer 1 to move (straight line or circular motion) to an assigned address after receiving transposition instruction, in motion process, main switch K1, auxiliary switch K2 are by the program opening and closing of setting, make circuit from a service position---as J1, J2 position is transformed into another service position---as J2, J3 position, the odd number section coil of transformer and even numbers section coil bridge joint, realize the circuit conversion in not power-off bringing onto load situation, and then the output voltage of adjustment transformer, ensure power supply quality, meet the electricity consumption requirement of user.Owing to there is potential difference between each fixed contact of odd number section coil and between each fixed contact of even numbers section coil, therefore use the short circuit current in transition resistance R limiting circuit transfer process.

Vice versa.

Program during circuit conversion:

Switch process 1: Fig. 3 a, 1 grade of service position, load current flows through fixed contact J1, odd number initiatively contact A1, main switch K1, even numbers initiatively contact A2, fixed contact J2;

Switch process 2: Fig. 3 b, main switch K1 disconnect, and load current flows through fixed contact J1, the secondary moving contact B1 of odd number, transition resistance R, auxiliary switch K2, the secondary moving contact B2 of even numbers, fixed contact J2;

Switch process 3: Fig. 3 c, odd number initiatively contact A1 disconnects, and load current path is with switch process 2;

Switch process 4: Fig. 3 d, odd number initiatively contact A1 contacts with fixed contact J3, and load current is still with switch process 2.

Switch process 5: Fig. 3 e, main switch K1 are closed, and load current flows through fixed contact J3, odd number initiatively contact A1, main switch K1, even numbers initiatively contact A2, fixed contact J2; Because fixed contact J1, fixed contact J3 exist potential difference, therefore at fixed contact J1, transformer odd number section coil J1J3 section, fixed contact J3, odd number, initiatively contact A1, main switch K1, even numbers initiatively form conductive path between contact A2, fixed contact J2, the secondary moving contact B2 of even numbers, auxiliary switch K2, transition resistance R, the secondary moving contact B1 of odd number, now have the electric current being referred to as circulating current to flow through, the effect of transition resistance R is scope circulating current being limited in permission.

Switch process 6: Fig. 3 f, auxiliary switch K2 disconnect, and load current flows through fixed contact J3, odd number initiatively contact A1, main switch K1, even numbers initiatively contact A2, fixed contact J2;

Switch process 7: Fig. 3 g, the secondary moving contact B1 of odd number disconnects, and load current path is with switch process 6;

Switch process 8: Fig. 3 h, the secondary moving contact B1 of odd number contacts with fixed contact J3, and load current is still with switch process 6;

Switch process 9: Fig. 3 i, auxiliary switch K2 closes, and due to the effect of transition resistance R, load current path is still with switch process 6; Complete the conversion from service position 1 to service position 2.

Claims

1. an on-load shunting switch with bridge connection, the transposer of every phase mainly contains main switch (K1), auxiliary switch (K2), transition resistance (R), odd number active contact (A1), even numbers initiatively contact (A2), the secondary moving contact (B1) of odd number, the secondary moving contact (B2) of even numbers and n fixed contact (J), it is characterized in that the two ends of main switch (K1) are electrically connected with odd number active contact (A1), even numbers active contact (A2) respectively; One end of auxiliary switch (K2) is electrically connected by the secondary moving contact (B1) of transition resistance (R) and odd number, and the other end is electrically connected with the secondary moving contact (B2) of even numbers; Main switch (K1) and odd number initiatively contact (A1), even numbers initiatively contact (A2) by two adjacent fixed contacts (J) the odd number section coil of transformer and the electrical connection of even numbers section coil.

2. on-load shunting switch with bridge connection according to claim 1, is characterized in that the transposer of every phase has 2 initiatively contact (A) and 2 secondary moving contacts (B) at least.

3. on-load shunting switch with bridge connection according to claim 1, is characterized in that main switch (K1), auxiliary switch (K2) is vacuum interrupter or electronic switch.