CN2350848Y

CN2350848Y - Transformer with vacuum current breaker

Info

Publication number: CN2350848Y
Application number: CN 98243478
Authority: CN
Inventors: 丁庚富
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-24
Filing date: 1998-09-24
Publication date: 1999-11-24
Anticipated expiration: 2008-09-24

Abstract

The utility model relates to a transformer with a vacuum current breaker which belongs to an improved transformer. The vacuum current breaker with four-phase is installed in a switching cabinet of the top part of the transformer, a lower leading-out seat of the breaker is respectively connected with leading-out terminals of a three-phase and a zero-phase of the transformer, an upper leading-out seat of the breaker is respectively connected with leading-in terminals of four high-voltage porcelain sleeves of the top part of the switching cabinet, a pressure protecting device and a temperature protecting device which are used for controlling the vacuum current breaker are installed in the switching cabinet, and the vacuum current breaker and the transformer are assembled to form an integrative structure. The utility model has the advantages of small volume, small ground occupation, low noise, no explosion, no fire hazard, reliable performance and good arc-extinguishing performance. When the utility model is used, the damage ratio of the transformer is obviously reduced, the time of power interruption is shortened, and the production loss is lowered.

Description

The transformer that has vacuum circuit-breaker

The utility model belongs to the improvement of transformer, particularly has the transformer of vacuum circuit-breaker.

The 10KV electrical network is the basic electrical network in the agricultural and city of China, and its distributes wide, relies on 10KV/0.4KV level transformer to carry out voltage transitions.The most mounting points of these transformers is relatively disperseed, single layout, and wiring is simple.Protection to transformer is to realize by external fall insurance and on-pole switch.Fall insurance is as identical short-circuit protection fuse, and protection is simple, but insensitive to the power transformer interior fault reaction; thereby the damage thing that makes these transformers is than higher; and well damage, in case the transformer damage is bigger for the industrial and agricultural production influence of this section.

The purpose of this utility model is to provide a kind of transformer that has vacuum circuit-breaker; on the basis of original transformer electic protection; vacuum circuit-breaker and transformer group are lumped together; be easy to transformer is realized comparatively perfect protection; will obviously reduce the spoilage of transformer; shorten the time that has a power failure, reduce production loss.

The utility model is achieved in that a kind of transformer that has vacuum circuit-breaker; comprise original electric protective device of transformer and the new road of vacuum device; at the transformer top switch cubicle is being set; four high voltage porcelain bushing pipes are installed at the top of switch cubicle; four phase (A are installed respectively in switch cubicle; B; C; O) vacuum circuit-breaker; the following outlet seat of vacuum circuit-breaker respectively with transformer A; B; the high voltage porcelain bushing pipe leading-out terminal of C three-phase and zero phase is connected; the last outlet of vacuum circuit-breaker is connected by the inlet wire of high-voltage connection with four high voltage porcelain bushing pipes at switch cubicle top respectively; side in switch cubicle is installed with the pressure protective device and the temperature protective device of control vacuum circuit-breaker; pressure protective device comprises pressure relief valve and mechanical interlock; end by pressure relief valve driving device linkage; its other end matches with the electromagnetic operating mechanism of vacuum circuit-breaker; in the rotating shaft of electromagnetic operating mechanism, be installed with respectively and connect A; B; the connecting lever of C three-phase and zero phase switching mechanism; A; B; the connecting lever installation direction of C three-phase differs 60 °-90 ° with zero connecting lever mutually; temperature protective device comprises thermal detector and lever driving device; thermal detector is arranged in the interior transformer oil of transformer; the piston of thermal detector matches with an end of lever driving device, and the other end of lever driving device matches with the mechanical interlock of pressure protective device.

The utility model lumps together vacuum circuit-breaker and transformer group, and vacuum circuit-breaker is nontoxic, non-detonating, no fire hazard, noise is low, volume is little, dependable performance, arc extinction performance is good, the quenching time is short, maintenance load is little, can excise transformer fast.The utility model when work, when transformer internal pressure during, pressure relief valve action greater than 0.05MPa, the driving device linkage, the strike bar of mechanical interlock hits the tripping operation iron core of electromagnetic operating mechanism, makes the vacuum circuit-breaker tripping operation; When the temperature of transformer was higher than 85 ℃, the piston of thermal detector promoted lever driving device, made the other end of lever driving device promote mechanical interlinked mechanism and made the vacuum circuit-breaker tripping operation, and transformer breaks away from power supply.More than two kinds of protections all be mounted on the transformer body; the transmission of dependence mechanical force realizes defencive function; it is swift in motion reliably, and failure transformer can be excised failure transformer under the not too high condition of pressure, temperature parameter, helps preventing the transformer exploding and firing.In addition, because connection A, the B that installs respectively in the rotating shaft of electromagnetic operating mechanism, the connecting lever of C threephase switch mechanism differ 60 °-90 ° with zero connecting lever mutually, before the circuit breaker contact disconnects, automatically zero phase switch closes earlier, promptly earlier with after the transformer neutral point resistance grounded, disconnect vacuum circuit-breaker again, this will greatly reduce the overvoltage amplitude, help the safe operation of transformer, prevent of the infringement of serious overvoltage transformer.

Fig. 1 removes the structural representation of part side cover for the utility model;

Fig. 2 removes the structural representation of part top cover for the utility model;

Fig. 3 is vacuum circuit-breaker A, B, C three-phase structural scheme of mechanism;

Fig. 4 is vacuum circuit-breaker zero a phase structural scheme of mechanism;

Fig. 5 is pressure protective device and temperature protective device schematic diagram;

Fig. 6 looks schematic diagram for the master of vacuum circuit-breaker mechanism;

Fig. 7 is the vacuum circuit-breaker schematic side view.

Below in conjunction with accompanying drawing the utility model is further described, a kind of transformer that has vacuum circuit-breaker, comprise transformer and vacuum circuit-breaker, at transformer 1 top switch cubicle 2 is being set, four high voltage porcelain bushing pipes 3 are installed at the top of switch cubicle 2, four phase (A are installed respectively in switch cubicle 2, B, C, O) vacuum circuit-breaker 5, the following outlet seat of four phase vacuum circuit-breakers 5 respectively with the A of transformer, B, high voltage porcelain bushing pipe 6 leading-out terminals of C three-phase and zero phase are connected, the last outlet of four phase vacuum circuit-breakers is connected by the inlet wire of high-voltage connection with four high voltage porcelain bushing pipes 3 at switch cubicle 2 tops respectively, side in switch cubicle 2 is installed with the pressure protective device 7 and the temperature protective device 8 of control vacuum circuit-breaker 5, as shown in Figure 5, pressure protective device 7 comprises pressure relief valve and mechanical interlock, on the transformer housing of switch cubicle 2 bottoms, be installed with and have top pressure relief valve 19, shell fragment 20 its crank throw places of crank throw shape are hinged on the jointed shaft by hinge hole, match with the top of pressure relief valve 19 in the horizontal arm lower end of crank throw, retainer spring 21 is being set on the upright arm of crank throw, the inclination that matches with horizontal lever 22 terminations is being set on the crank throw head of its upright arm is contacting supporting surface, the opposite side of the horizontal lever 22 that the middle part is hinged is installed with tension spring 23, the hinged upright drive link 26 that is installed with in its end, match with strike bar 24 in being installed in guide cylinder 25 in the top of drive link 26, exposing the top of the strike bar 24 of guide cylinder 26 matches with the tripping operation iron core of vacuum circuit-breaker electromagnetic operating mechanism 4, when transformer internal pressure during greater than 0.05MPa, pressure relief valve 19 actions, its top strike shell fragment 20, the termination and the shell fragment 20 of horizontal lever 22 are threaded off, horizontal lever 22 is under the tension of spring 24, promoting drive link 26 moves upward, make and hit the tripping operation iron core that bar 24 hits vacuum circuit-breaker electromagnetic operating mechanism 4, make the vacuum circuit-breaker tripping operation; In the rotating shaft of electromagnetic operating mechanism 4, fixedly mounting connecting lever A, the B that connects A, B, C three-phase and zero phase switching mechanism respectively, the installation direction of C three-phase connecting lever 9 differs 60 °-90 ° with the zero installation direction of connecting lever 10 mutually, realized the vacuum circuit-breaker contact disconnect before moment will be to be excised the transformer of isolated neutral be converted to the neutral ground operational mode after, give cut-off breaker again, reduced when vacuum circuit-breaker cuts off transformer producing the overvoltage amplitude, prevented of the infringement of serious overvoltage transformer; Temperature protective device comprises draws together thermal detector and lever driving device; thermal detector is for to be installed with the ampuliform bag 12 that is made of mylar at cylindrical shell 11 internal fixation; in cylindrical shell 11, transformer oil is housed; in ampuliform bag 12, adorning mercury; on the top of mercury floating piston 13 is installed; the end of exposing the upper end of piston rod of bottleneck and lever 15 is hinged; the middle part of lever 15 is being provided with the hinged strong point; bottom at the lever 15 of Hinged piston bar one side is fixedly mounting extension spring 14; the auxiliary lever 17 that is being slidingly installed in the axial channel 16 of the end side of lever 15 has the termination of roller; the middle part of width of cloth lever 17 is being provided with the hinged strong point; the opposite side termination of auxiliary lever 17 is connecting upright push rod 18; match with the horizontal arm lower end of pressure protective device shell fragment 20 crank throws in the top of push rod 18; in the time of 60 ℃, make mercury height face parallel with the bottleneck end opening place of ampuliform bag 12; cylindrical shell 11 is installed in the transformer oil; rising mercury expanded by heating along with the transformer temperature; the promotion piston rod moves upward; head on shell fragment 20; when the transformer temperature is higher than 85 ℃; promoting 18 continues to move upward; push shell fragment 20; the termination and the shell fragment 20 of horizontal lever 22 are threaded off; mechanical interlock makes circuit breaker trip, and transformer breaks away from power supply.

Claims

1. transformer that has vacuum circuit-breaker; comprise original electric protective device of transformer and vacuum circuit-breaker; it is characterized in that switch cubicle (2) being set at transformer (1) top; at the top of switch cubicle (2) four high voltage porcelain bushing pipes (3) are installed; four groups of vacuum circuit-breakers (5) are installed respectively in switch cubicle (2); the following outlet seat of four phase vacuum circuit-breakers (5) respectively with the A of transformer; B; high voltage porcelain bushing pipe (6) leading-out terminal of C three-phase and zero phase is connected; the last outlet seat of four phase vacuum circuit-breakers (5) is connected by the end of incoming cables of high-voltage connection with four high voltage porcelain bushing pipes (3) at switch cubicle top respectively; side in switch cubicle (2) is installed with the pressure protective device (7) and the temperature protective device (8) of control vacuum circuit-breaker; pressure protective device (7) comprises pressure relief valve (19) and mechanical interlock; on the transformer housing of switch cubicle (2) bottom, pressure relief valve (19) is installed; end by pressure relief valve (19) driving device linkage; its other end matches with the electromagnetic operating mechanism (4) of vacuum circuit-breaker; in the rotating shaft of electromagnetic operating mechanism (4), fixedly mounting connection A respectively; B; the connecting lever of C three-phase and zero phase switching mechanism; A; B; the connecting lever of C three-phase (9) installation direction differs 60 °-90 ° with zero connecting lever (10) mutually; temperature protective device (8) comprises thermal detector and lever driving device; thermal detector is arranged in the interior transformer oil of transformer; the piston of thermal detector matches with an end of lever driving device, and the other end of lever driving device matches with the mechanical interlock of pressure protective device.

2. the transformer that has vacuum circuit-breaker according to claim 1; it is characterized in that pressure protective device (7) has top pressure relief valve (19) for being installed with on the transformer housing of switch cubicle (2) bottom; its crank throw place of the shell fragment of crank throw shape (20) is hinged on the jointed shaft by hinge hole; top the matching of the horizontal arm lower end of crank throw and pressure relief valve (19); retainer spring (21) is being set on the upright arm of crank throw; the inclination that matches with horizontal lever (22) termination is being set on the crank throw head of its upright arm is contacting supporting surface; the opposite side of the horizontal lever (22) that the middle part is hinged is installed with tension spring (23); the hinged upright drive link (26) that is installed with in its end; the top of drive link (26) the strike bar (24) interior with being installed in guide cylinder (25) matches, and exposes the top of the strike bar (24) of guide cylinder (25) and matches with the tripping operation iron core of vacuum circuit-breaker electromagnetic operating mechanism (4).

3. the transformer that has vacuum circuit-breaker according to claim 1; it is characterized in that temperature protective device (8) comprises thermal detector and lever driving device; thermal detector is for to be installed with the ampuliform bag (12) that is made of mylar at cylindrical shell (11) internal fixation; in cylindrical shell (11), transformer oil is housed; in ampuliform bag (12), adorning mercury; floating piston (13) is installed on the top of mercury; the end of exposing the upper end of piston rod of bottleneck and lever (15) is hinged; the middle part of lever (15) is being provided with the hinged strong point; bottom at the lever (15) of Hinged piston bar one side is fixedly mounting extension spring (14); the auxiliary lever (17) that is being slidingly installed in the axial channel (16) of the end side of lever (15) has the termination of roller; the middle part of width of cloth lever (17) is being provided with the hinged strong point; the opposite side termination of auxiliary lever (17) is connecting upright push rod (18), matches with the mechanical interlock shell fragment (20) of pressure protective device in the top of push rod (18).