CN201994576U

CN201994576U - Double-bus bar fixed metallic enclosed switching device

Info

Publication number: CN201994576U
Application number: CN2011200075781U
Authority: CN
Inventors: 纪法清; 缪云辉; 杨明健; 刘德业; 徐克峰; 孙忠庆
Original assignee: SHANDONG LUYITONG INTELLIGENT ELECTRICAL CO Ltd
Current assignee: SHANDONG LUYITONG INTELLIGENT ELECTRICAL CO Ltd
Priority date: 2011-01-02
Filing date: 2011-01-02
Publication date: 2011-09-28
Anticipated expiration: 2021-01-02

Abstract

The utility model discloses a double-bus bar fixed metallic enclosed switching device. The device has a cabinet body which is composed of a front cabinet body and a rear cabinet body. The front cabinet body is segmented into four function compartments, namely, a breaker room, a relay room, a front bus bar room, and a small bus bar room via metal plates, while the rear cabinet body is segmented into two function compartments, namely, a cable room and a rear bus bar room. The breaker room is provided with a breaker, a forward upper isolating switch, two current transformers, and an overvoltage protection device. The cable room is provided with a rear upper isolating switch, a lower isolating switch, an upper grounding switch, a lower grounding switch, and a zero sequence mutual inductor. The front bus bar room and the rear bus bar room are provided with a I section main bus bar and a I I section main bus bar respectively. The small bus bar room is provided with a control small bus bar. The connections among the function compartments are realized by bus bar sleeves. The utility model can guarantee the safety of the maintenance personnel, does not worsen the accident and is safe and reliable.

Description

The fixed metal enclosed switch device of a kind of double-bus

Technical field

The utility model belongs to power transmission and distribution industry electric equipment technical field, especially relates to the fixed metal enclosed switch device of a kind of double-bus.

Technical background

35KV voltage air insulation metal enclosed switchgear double-bus configuration system has handcart-type and fixed two kinds, along with the circuit breaker level improves, some circuit breaker is accomplished non-maintaining, fixed easy to operate, use reliable odds ratio more outstanding, the design apparatus shell that originally had is the metallic plate sealing, device built-in function cell compartment communicates, or adopt insulation board to isolate, the bus-bar room of different device also communicates, and in a single day such equipment have an accident, easily misfortune and other switchgear, simultaneously when one section bus operation, have unsafe conditions when overhauling another section bus, the design mechanical lock that has is not an overall structure, but split-type structural, the blocking mechanism more complicated, inconvenient operation.

Summary of the invention

The purpose of this utility model be to improve the deficiency of prior art and provide a kind of and guaranteed maintainer's safety, do not expand accident, the safe and reliable fixed metal enclosed switch device of double-bus.

The purpose of this utility model is to realize like this; the fixed metal enclosed switch device of a kind of double-bus; form cabinet by preceding cabinet and back cabinet; be divided into breaker chamber by metallic plate in the cabinet before it is characterized in that; relay bungalow; preceding bus-bar room; four function compartments of little bus-bar room; back cabinet is divided into cable vault and two function compartments of back bus-bar room by metallic plate; circuit breaker is installed in the breaker chamber; the preceding isolating switch of going up; two current transformers and overvoltage protection device; the back is installed in the cable vault goes up isolating switch; following isolating switch; last earthed switch; following earthed switch and zero-sequence transformer; preceding bus-bar room and back bus-bar room are separately installed with I section main bus bar; II section main bus bar; little bus-bar room is equipped with the little bus of control, connects between the function compartment to connect by bus casing.

In order further to realize the purpose of this utility model, can be to go up in the breaker chamber plug-in type maintenance insulating barrier is arranged between isolating switch and circuit breaker, be provided with the insertion mouth of maintenance insulating barrier at the correspondence position of breaker chamber.

In order further to realize the purpose of this utility model, can be that the offside door of maintenance insulating barrier and breaker chamber is provided with interlock.

In order further to realize the purpose of this utility model, can be to be provided with metal partion (metp) and insulating barrier between last isolating switch in the cable vault and following isolating switch.

In order further to realize the purpose of this utility model, can be each independently compartment be equipped with pressure relief device or ventilating fan.

Compared with the prior art the utility model has following distinguishing feature and good effect: the utility model adopts each functional unit chamber to be the individual compartment that metallic plate separates, with general box switchgear structure is different, not only guarantee switchgear under normal operation the maintainer at the maintenance safety of other compartment, and can avoid one to occur accident at interval, the autgmentability accident of misfortune and other switchgear takes place; Connect between the function compartment by the bus casing connection, bus is connected with other functional unit compartment element by bus casing, guarantees switchgear safety, avoids the autgmentability accident to take place; Plug-in type anti-flammability maintenance insulating barrier is arranged between isolating switch and circuit breaker in the breaker chamber, be provided with the insertion mouth of maintenance insulating barrier at the correspondence position of breaker chamber, before the maintenance circuit breaker, have only the maintenance insulating barrier is inserted a mouthful insertion from dividing plate, at this moment the breaker chamber offside door just can be opened; Insulating barrier shelters from the charged position of static contact isolation switch, and the maintainer can enter in the cabinet, thereby guarantees maintainer's safety; The offside door of maintenance insulating barrier and breaker chamber is provided with interlock, and the maintenance insulating barrier does not insert, and offside door can not be opened, and avoids mistakenly entering charged chamber to the potential safety hazard that the maintainer brings, and has improved fail safe; Be provided with metal partion (metp) and insulating barrier between last isolating switch in the cable vault and following isolating switch, shelter from the charged position of static contact isolation switch, guarantee that the maintainer is at cable vault's maintenance safety; Each compartment is equipped with pressure relief device, when in the cabinet because accidental cause pressure when increasing, the pressure relief device cover plate will be opened automatically, make the directed discharging of pressed gas, to guarantee the safety of operating personnel and switchgear; The utlity model has and prevent on-load deciliter isolating switch, prevent that mistake from dividing mistake to close circuit breaker, prevent charged splice grafting ground switch, preventing the characteristics of mistakenly entering charged chamber.

Description of drawings

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

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

Fig. 2 is an another kind of structural representation of the present utility model.

Fig. 3 is a kind of structural representation at cabinet panel of the present utility model position.

Embodiment

Embodiment 1, the fixed metal enclosed switch device of a kind of double-bus, with reference to Fig. 1, form cabinet by preceding cabinet 4 and back cabinet 8, be divided into breaker chamber 28 by metallic plate in the preceding cabinet 4, relay bungalow 27, preceding bus-

bar room

24,26 4 function compartments of little bus-bar room, back cabinet 8 is divided into

cable vault

29 and 25 two function compartments of back bus-bar room by metallic plate, circuit breaker 5 is installed in the breaker chamber 28, the preceding isolating switch 6 of going up, two current transformers 7 and overvoltage protection device 9, the back is installed in the cable vault 29 goes up isolating switch 13, following isolating switch 14, last earthed switch 15, following earthed switch 16 and zero-sequence transformer 17, preceding bus-bar room 24 and back bus-bar room 25 are separately installed with I section main bus bar 1, II section main bus bar 2, little bus-bar room 26 is equipped with the little bus 3 of control, connect between the function compartment by bus casing 19 and connect, connection between each element can connect by prior art as required, in the present embodiment, primary element in breaker chamber 28 and the cable vault 29 is formed the current supply circuit of switching device electric energy transmitting, i.e. primary circuit; Preceding bus-bar room 24 and back bus-bar room 25 are separately installed with I section main bus bar 1, II section main bus bar 2, form double-bus, power unit for a whole set of switching device electric energy transmitting, installation and control, protection, detection, metering secondary component in the relay bungalow 27 are formed the secondary circuit of switching device with the auxiliary contact of primary element; The little bus 3 of little bus-bar room 26 installation and control is for secondary circuit provides power supply; Six functional unit compartment elements connect by first and second electric hookup, preceding isolating switch 6 fixed contacts of going up promptly in I section main bus bar 1 and the breaker chamber 28 of bus-bar room 24 are connected, and the II section main bus bar 2 of back bus-bar room 25 and cable vault 29 interior back upward isolating switch 13 fixed contacts are connected; Preceding upward isolating switch 6 moving contacts of breaker chamber 28 reach upward with back upward isolating switch 13 moving contacts of cable vault 29, and earthed switch 15 fixed contacts are connected, and be connected with current transformer 7 one ends that are installed in breaker chamber 28 middle parts, the other end of current transformer 7 is connected with leading-out terminal on the circuit breaker 5, circuit breaker 5 lower wire ends are connected with current transformer 7 one ends that are installed in breaker chamber 28 bottoms, these current transformer 7 other ends are connected with following isolating switch 14 moving contacts, following isolating switch 14 fixed contacts are connected with following earthed switch 16 fixed contacts, service cable is connected with following earthed switch 16 fixed contacts by zero-sequence transformer 17, forms the current supply circuit of switching device electric energy transmitting; Secondary component is connected with the auxiliary contact of primary element in the relay bungalow 27; form the control loop of switching device; overvoltage protection device 9 is connected on the primary circuit; for whole switching device provides overvoltage protection; earth bus 18 compiles switching device element earth connection; play the ground protection effect, constitute a kind of structure of the present utility model like this.

Embodiment 2, the fixed metal enclosed switch device of a kind of double-bus, with reference to Fig. 2, Fig. 3, go up isolating switch 6 and 5 of circuit breakers in the breaker chamber 28 plug-in type maintenance insulating barrier 10 is arranged, be provided with the insertion mouth 20 of maintenance insulating barrier 10 at the correspondence position of breaker chamber 28, maintenance insulating barrier 10 is provided with interlock 21 with the offside door of breaker chamber 28,

last isolating switch

13 and 14 of following isolating switches in the cable vault 29 are provided with metal partion (metp) 22 and insulating barrier 23, each independently compartment be equipped with pressure relief device 12 or ventilating fan 11, other and embodiment are identical.

When electricity was sent in use, one section main bus bar sent electricity, and then the last isolating switch of this section main bus bar connection closes a floodgate, and the last isolating switch that another section main bus bar connects disconnects, and the switching device operation is undertaken by the program that designs in advance.

Claims

1. fixed metal enclosed switch device of double-bus; form cabinet by preceding cabinet (4) and back cabinet (8); it is characterized in that being divided into breaker chamber (28) by metallic plate in the preceding cabinet (4); relay bungalow (27); preceding bus-bar room (24); (26) four function compartments of little bus-bar room; back cabinet (8) is divided into cable vault (29) and (25) two function compartments of back bus-bar room by metallic plate; circuit breaker (5) is installed in the breaker chamber (28); the preceding isolating switch (6) of going up; two current transformers (7) and overvoltage protection device (9); the back is installed in the cable vault (29) goes up isolating switch (13); following isolating switch (14); last earthed switch (15); following earthed switch (16) and zero-sequence transformer (17); preceding bus-bar room (24) and back bus-bar room (25) are separately installed with I section main bus bar (1); II section main bus bar (2); little bus-bar room (26) is equipped with control little bus (3), connects by bus casing (19) between the function compartment to connect.

2. the fixed metal enclosed switch device of a kind of double-bus according to claim 1, it is characterized in that interior the going up of breaker chamber (28) has plug-in type maintenance insulating barrier (10) between isolating switch (6) and circuit breaker (5), be provided with the insertion mouth (20) of maintenance insulating barrier (10) at the correspondence position of breaker chamber (28).

3. the fixed metal enclosed switch device of a kind of double-bus according to claim 2 is characterized in that the offside door that overhauls insulating barrier (10) and breaker chamber (28) is provided with interlock (21).

4. the fixed metal enclosed switch device of a kind of double-bus according to claim 1 is characterized in that being provided with metal partion (metp) (22) and insulating barrier (23) between last isolating switch (13) in the cable vault (29) and following isolating switch (14).

5. the fixed metal enclosed switch device of a kind of double-bus according to claim 1, it is characterized in that each independently compartment be equipped with pressure relief device (12) or ventilating fan (11).