CN203406512U - Breaker room with bus isolation and bus metering - Google Patents

Abstract

The utility model provides a breaker chamber with a bus isolating function and a bus measuring function. The breaker chamber is used for a sulfur hexafluoride gas insulation switch cabinet. Through isolation earthing switches of mutual inductors, connection and effective earthing of the mutual inductors on a bus side can be controlled, thereby realizing measurement of voltage on the bus side and effective earthing of a voltage transformer in maintenance. The design integrates feeders and a measurement function of a bus with the isolation earthing switches, so an additional bus measuring cabinet is not needed, thereby greatly saving cost and occupation of space of the additional switch cabinet.

Description

Breaker room with bus isolation and bus metering

technical field

The utility model belongs to the technical field of electric power products, in particular to a circuit breaker chamber applied to gas insulated switchgear. The circuit breaker room has a simple structure and integrates the feeder and bus side voltage measurement with an isolation grounding switch device, which greatly saves cost and occupied space. the

Background technique

Usually, in order to realize the measurement of the voltage on the busbar side of the SF ₆ gas insulated switchgear and the device with the function of isolating the earthing switch, it is necessary to add a busbar measuring cabinet with an isolating switch.

Fig. 1 is a circuit breaker room of an existing feeder cabinet. During operation, the feeder cabinet shell 11 is connected to the next cabinet shell, and the current passes through the feeder cabinet solid insulated bus bar and the solid insulated bus bar tee/cross adapter to the bus bushing 12 , Three-position upper static contact 13, three-position moving contact 14, three-position lower static contact 15, upper branch connecting row 17, middle branch connecting row 18, vacuum arc extinguishing device 19, lower branch connecting row 111 And the current transformer 112, and finally to the cable bushing 113, so as to realize the function of the feeder. the

Figure 2 is an air chamber of an existing busbar-side voltage measurement cabinet with isolation function. During operation, the busbar isolation cabinet housing 21 is connected to the feeder cabinet housing 11, and the current passes through the solid insulated busbar and the solid insulated busbar three-way/four-way adapter , to the upper branch connection bar 23, then to the bus isolating switch 25 in the air chamber, and finally to the voltage transformer 26, so as to realize the voltage measurement with the isolation function on the bus side. the

In the prior art, in order to realize the measurement of the voltage on the busbar side and the isolation of the measurement device, it is necessary to increase the switchgear, which not only increases the cost, but also increases the occupied area. Therefore, the utility model proposes a brand-new circuit breaker room, which realizes bus bar measurement and measurement device with isolation and grounding function on the basis of the original feeder cabinet. In this way, the cost is greatly saved, and the floor space is saved, making the original switchgear more efficient and compact. the

Utility model content

The purpose of the utility model is to provide a more reasonable structure, more efficient and more compact solution to realize the measurement of the busbar with the isolation and grounding function of the feeder cabinet. the

In the utility model, the circuit breaker room with bus isolation function and bus measurement function, the circuit breaker room of the feeder cabinet and the isolating switch of the bus side voltage transformer are connected together. the

According to the best embodiment of the present utility model, the circuit breaker room with bus isolation function and bus measurement function includes housing, solid insulated bus, solid insulated bus four-way adapter, bus bushing, three-position upper static contact, Three-position moving contact, three-position lower static contact, three-position operating mechanism, upper branch connection copper bar, middle branch connection copper bar, vacuum arc extinguishing device, circuit breaker operating mechanism, lower branch connection copper bar, current The transformer, the cable casing, and the above-mentioned parts are connected in sequence to form a circuit of the feeder cabinet. the

According to the best embodiment of the present utility model, the circuit breaker room with busbar isolation function and busbar measurement function also includes the connection contact of the voltage transformer isolating switch, the operating mechanism of the isolation grounding switch, the wall bushing of the voltage transformer, and the voltage transformer. Transformer adapter, voltage transformer, voltage transformer bracket, voltage transformer isolating switch grounding contact; these parts are sequentially connected with the static contact on the three-position, forming a connection or grounding circuit of the voltage transformer with isolation grounding switch device . the

According to a preferred embodiment of the present invention, the voltage transformer adapter has an interface for connecting the voltage transformer. the

According to the best embodiment of the utility model, the voltage transformer adapter includes a voltage transformer adapter silicon rubber body, a voltage transformer adapter semiconductor coating, an insulating shielding layer and an insert, and also includes a gasket, a nut and a voltage transformer through the wall casing. the

According to the best embodiment of the utility model, the voltage transformer adapter is connected to the voltage transformer through the voltage transformer interface so as to realize the bus side voltage measurement circuit. the

Or the voltage transformer adapter further includes a voltage transformer adapter blind plug and a voltage transformer adapter cover, and the voltage transformer adapter blind plug and the voltage transformer adapter cover close the voltage transformer interface, thereby realizing the busbar side Voltage is not measured. the

Description of drawings

Figure 1 shows the circuit breaker room of the existing feeder cabinet;

Figure 2 shows the existing gas compartment with bus side voltage measurement isolation device;

Fig. 3 is a circuit breaker room with bus side voltage measurement and isolation grounding function of the utility model, when the bus side voltage measurement isolating switch and the feeder isolating switch are both in the "closed" connection schematic diagram;

Figure 4 is a voltage transformer adapter with the option of plugging in a voltage transformer;

Figure 5 shows the VT adapter without the option to plug in the VT. the

Detailed ways

Below in conjunction with accompanying drawing of the utility model, describe the preferred embodiment of the utility model in more detail. the

Fig. 3 is a circuit breaker room of the utility model with the function of isolation and grounding for voltage measurement on the bus side. The figure shows the connection diagram when the isolating switch for voltage measurement on the bus side is in the "closed" state; it will disconnect the feeder cabinet. The device room and the bus side voltage measurement isolation grounding device are connected together, and the structure and components are reasonably arranged. the

The circuit breaker chamber of the utility model with bus isolation function includes a housing 31, the housing 31 is spliced with the next cabinet, a solid insulated bus 32, a solid insulated bus four-way adapter 33, a bus bushing 34, and a static contact 35 on the three stations , three-position moving contact 36, three-position lower static contact 37, three-position operating mechanism 38; connecting copper bars include upper branch connecting copper bar 39, middle branch connecting copper bar 310; vacuum arc extinguishing device 311, circuit breaker The device operating mechanism 312, the lower branch connection copper bar 313, the current transformer 314, and the cable bushing 315 are connected in sequence to form the feeder circuit of the circuit breaker room of the feeder cabinet. Among them, the vacuum arc extinguishing device (311) and the circuit breaker operating mechanism (312) form a circuit breaker; the three-position upper static contact (35), the three-position moving contact (36), and the three-position lower static contact (37) ) and a three-position operating mechanism (38) form a three-position switch. the

When working, the static contact 35 on the three stations, the connection contact 321 of the voltage transformer isolation switch, the isolation grounding switch operating mechanism 322, the voltage transformer wall bushing 323, the voltage transformer adapter 324, and the voltage transformer 325 , the voltage transformer bracket 326, and the grounding contact 327 of the voltage transformer isolating switch are sequentially connected to form a bus-side voltage measurement circuit with an isolating grounding switch device. the

Fig. 4 is a circuit of the utility model with a bus side voltage measurement function, which can be functionally selected to measure the bus side voltage, that is, select a voltage transformer adapter to connect and plug in a voltage transformer. The voltage transformer adapter 324 includes a voltage transformer adapter silicon rubber body 41, a voltage transformer adapter semiconductor coating 42, an insulating shielding layer 43 and an insert 44, and also includes a gasket 45, a nut 46 and a voltage transformer wall bushing 49 , connect the voltage transformer 47 through the voltage transformer interface, so as to realize the bus side voltage measurement. the

Fig. 5 is a circuit of the utility model with the voltage measurement function on the bus side, but the functional selection does not measure the voltage on the bus side. That is, an assembly with non-plug-in voltage transformers is configured for the voltage transformer adapter. As above, the voltage transformer adapter 324 includes a voltage transformer adapter silicon rubber body 41, a voltage transformer adapter semiconductor coating 42, an insulating shielding layer 43 and an insert 44, and also includes a gasket 45, a nut 46 and a voltage transformer wall sleeve Tube 49. In the case that the voltage on the bus side is not measured, the voltage transformer adapter 324 does not need to be connected to the voltage transformer, and the voltage transformer interface is closed by the voltage transformer adapter blind plug 57 and the voltage transformer adapter cover 58, thereby realizing Bus side voltage is not measured. the

Although the preferred embodiment of the utility model and accompanying drawings are disclosed for the purpose of illustration, those skilled in the art can make various replacements, Variations and retouching. Therefore, the utility model should not be limited to the content disclosed in the preferred embodiments and drawings, and the scope of protection of the utility model should be defined by the appended claims. the

Claims (7)

1. A circuit breaker room with bus isolation function and bus measurement function, which includes circuit breaker (311,312), connecting copper bar (39,310,313) and three-position switch (35,36,37, 38), characterized in that: the circuit breaker room of the feeder cabinet and the isolating switch of the voltage transformer on the bus side are connected together. 2. The circuit breaker room with bus isolation function and bus measurement function according to claim 1, characterized in that: the circuit breaker includes a vacuum arc extinguishing device (311) and a circuit breaker operating mechanism (312); The connection copper bar includes an upper branch connection copper bar (39), a middle branch connection copper bar (310) and a lower branch connection copper bar (313); the three-position switch includes a three-position upper static contact (35), three station moving contact (36), three-station lower static contact (37) and three-station operating mechanism (38); the circuit breaker chamber with busbar isolation function and busbar measurement function also includes a housing (31 ), solid insulated busbar (32), solid insulated busbar four-way adapter (33), busbar bushing (34), current transformer (314) and cable bushing (315), said parts are connected in sequence to form a feeder cabinet circuit. 3. The circuit breaker room with bus isolation function and bus measurement function according to claim 1 or 2, characterized in that: it also includes a voltage transformer isolating switch connecting contact (321), an isolating grounding switch operating mechanism ( 322), voltage transformer wall bushing (323), voltage transformer adapter (324), voltage transformer (325), voltage transformer bracket (326), voltage transformer isolating switch ground contact (327); these The parts are sequentially connected with the static contacts (35) on the three stations to form a connecting or grounding circuit of the voltage transformer with isolation grounding switch device. 4. The circuit breaker room with bus isolation function and bus measurement function according to claim 3, characterized in that: the voltage transformer adapter (324) has an interface for connecting the voltage transformer. 5. The circuit breaker room with busbar isolation function and busbar measurement function according to claim 3, characterized in that: the voltage transformer adapter (324) comprises a voltage transformer adapter silicon rubber body (41), a voltage transformer adapter The semiconductor coating (42), the insulating shielding layer (43) and the insert (44) also include a gasket (45), a nut (46) and a voltage transformer wall bushing (49). 6. The circuit breaker room with busbar isolation function and busbar measurement function according to claim 5, characterized in that: the voltage transformer adapter (324) connects the voltage transformer (47) through the voltage transformer interface to realize the busbar side voltage measurement circuit. 7. The circuit breaker room with bus isolation function and bus measurement function according to claim 5, characterized in that: the voltage transformer adapter (324) further comprises a voltage transformer adapter blind plug (57) and a voltage transformer The adapter cover (58), the voltage transformer adapter blind plug (57) and the voltage transformer adapter cover (58) seal the voltage transformer interface, so that the bus side voltage is not measured.

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