CN200983473Y

CN200983473Y - Enclosed switch case of low-voltage out breaker

Info

Publication number: CN200983473Y
Application number: CN200620089997.3U
Authority: CN
Inventors: 付军; 史慧明; 胡宝成
Original assignee: ZHONGGONG ELECTRIC MACHINE FACTORY OF DALIAN
Current assignee: ZHONGGONG ELECTRIC MACHINE FACTORY OF DALIAN
Priority date: 2006-03-21
Filing date: 2006-03-21
Publication date: 2007-11-28
Anticipated expiration: 2016-03-21

Abstract

The utility model provides a closed switchgear with a low-voltage extraction circuit breaker, in which a frame-type universal circuit breaker is installed in the middle of the switchgear incoming line cabinet, and a capacitance compensation thyristor master switch and a compensation capacitor are installed in the lower part of the switchgear, and the switching of the compensation capacitor adopts a dual system ;The feeder cabinet of the switchgear adopts withdrawable circuit breakers, and 6 sets of withdrawable circuit breakers are installed in total, with 6 distribution outlets; the space reserved at the bottom and rear of the switch cabinet contact cabinet can be installed with compensation capacitors; the interior of the switch cabinet is divided into small rooms according to functions, and the outlets All the cables go out from the lower part of the cabinet, 600mm away from the bottom of the cabinet, and the cable terminals are at the same height. Good contact, each 630KVA transformer only needs 1 incoming line cabinet, 1 feeder cabinet and 2 cabinets to meet the needs, correspondingly reducing the site area; this switch cabinet is energy-saving, easy to operate, economical, practical, safe and reliable.

Description

Low pressure is extracted the circuit breaker enclosed switchgear out

Technical field

The utility model belongs to low-voltage cabinet switchgear assembly and control appliance, and particularly a kind of low pressure is extracted the circuit breaker enclosed switchgear out.

Background technology

Low-tension switch cabinet is connected, uses cable outlet by the electric and plant equipment of one or more low tension switches and inside such as associated control, measurement, signal, protection, adjusting with bus; generally comprise supporting construction, mounting structure, mounting panel, installation frame, shell, cladding plate, door, movable cladding plate, cover plate, dividing plate, baffle plate, barrier, sideboard and cable inlet etc., a kind of assembly that intactly fits together with structure member again.Low-tension switch cabinet is widely used in industries such as substation, petrochemical industry, metallurgy, weaving, skyscraper power supply, be 50 (60) HZ, operating voltage 380 (660) volts, below the rated current 4000A, send out, the distribution in the electric power system, the low-voltage complete power distribution equipment that inactivity compensation uses as the three-phase alternating current frequency.Existing cabinet type (GGD type) bus is isolated the fixed knife switch of employing, replacing, repair apparatus complex operation; Locellus not in the cabinet, device layout is reasonable inadequately, and it is less that the big capacity of every cabinet is allotted the line loop number; Cable layout cabling from bottom to top, greater than 1 meter, bus lap-joint is a bare wire to cable apart from ground, to increasing, subtract cable operated inconvenience, danger coefficient is higher.

Summary of the invention

The purpose of this utility model is to provide a kind of low pressure to extract the circuit breaker enclosed switchgear out, solves the existing above-mentioned technological deficiency of switch cubicle.

The utility model is taked following technical scheme:

Low pressure is extracted the circuit breaker enclosed switchgear out and is closed by incoming line cabinet, feeder line cabinet and contact group, and cell is cut apart by function in switch cubicle inside; Capacitance compensation controllable silicon master switch is installed on the top of the forward closed cells in bottom in the incoming line cabinet, and compensation condenser is installed in the bottom; Adopt in the feeder line cabinet and extract circuit breaker out; The contact cabinet is the back headspace down; Insulating material is all applied mechanically in the bus outside, allots the line cable and takes cabinet bottom outlet method, allot the line cable all in the cabinet bottom at the bottom of the cabinet 600mm, cable connecting terminal is at sustained height, independent outlet chamber is arranged, adopt special-purpose ground connection card, hanging earthing conductor and safety are reliable again.

Feeder line cabinet drawout breaker has double break mouth, double space during disjunction, can add the padlock locking in addition, extracts circuit breaker out and has with compound protection or intelligent controlled function, can select according to cable capacity; Dark 800mm before and after the feeder line cabinet, the two sides, front and back is all operating surface, can install on the two sides and extract circuit breaker out, and a feeder line cabinet can be installed 6 630A and extract circuit breaker out, allots 6 times 630A and allots line.

The following front portion of contact cabinet is measuring instrument and table of merit rating, and the rear portion headspace can be installed compensation condenser as required.

Usually bus-bar room is established on switch cubicle top, the cable vault is established in the cabinet bottom, and framework universal circuit breaker chamber, compensation condenser chamber, control room, extraction breaker chamber etc. are established in other position, and special-purpose door is established in each chamber; In the cabinet, bus and bus, between bus and the vertical bus, lap-joint all adopts the sealing of isolated bus box.

Compared with prior art, the utility model has the advantages that:

1) have the unit cabinet and allot line characteristics capacious, thus switchgear house in compact area occupied little, reduce cost, be that GCS, GCK, MNS type switch cubicle (settling fixed switch) are incomparable.

2) in place from the spare space to the run location accurately electric contact is good for drawout breaker, and operation needn't have a power failure, laborsaving, and increase-volume or inspection switch only need be changed switch main body and get final product, and effectively prevent false switching, the safety height; Be specially adapted to renovating of old substation equipment, line and newly-built substation are expanded in increase-volume.

When 3) opening certain compartment door in the cabinet, can not touch electrified body in other compartment, safety; And help whole and each the functional compartments ventilation and heat of cabinet.

4) every outlet wiring all concentrates on the subjacent cable chamber, the mode of connection like this, and the reliability height, easy and safe to operate.

5) the capacitor switching adopts dual system, circuit contacts device and reverse-blocking tetrode thyristor to work in coordination, and improves the operation power consumption of reliability and reduction electronic switch; The compensation instrument apparatus is monitor voltage simultaneously, electric current, and active power, reactive power and conveying signal replace special-purpose distribution monitoring device, reduce cost.

Description of drawings

Fig. 1 is for extracting breaker type sealing low-tension switch cabinet incoming line cabinet schematic diagram out; (a) be guidance panel figure, (b) open the back structure chart for panel.

Fig. 2 is for extracting breaker type sealing low-tension switch cabinet feeder line cabinet schematic diagram out; (a) be guidance panel figure, (b) open the back structure chart for panel.

Fig. 3 is for extracting breaker type sealing low-tension switch cabinet contact cabinet schematic diagram out; (a) be guidance panel figure, (b) open the back structure chart for panel.

Among the figure: 7 capacitance compensation controllable silicon master switchs, 8 insulators, 9 isolated bus boxes, 10 binding posts, 11 compensation condensers, 12 cables, 13 cable vaults, 5 framework universal circuit breakers compensation condenser chambers 6, bus-bar room 1 bus insulation solidus frame bus 3 current transformers framework universal circuit breaker chambers 42,14 ventilative mouthfuls of 15 instrument, 16 control rooms, 17 electric capacity compensate instrument 18 automatically and extract breaker chamber 19 extraction circuit breaker 20 measuring instruments and table of merit rating 21 headspaces (22) out.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail: GGDC type low pressure is extracted circuit breaker enclosed switchgear, wherein GGDC type implication out:

The accompanying drawing mesolow is extracted the circuit breaker enclosed switchgear out, comprise incoming line cabinet, feeder line cabinet and contact cabinet, cell is all cut apart by function in cabinet inside, establish bus-bar room 1, framework universal circuit breaker chamber 5, compensation condenser chamber 7, cable vault 14, control room 17 respectively, extract breaker chamber 19 out, special-purpose door is established in each chamber; In the cabinet, between bus 3 and the bus 3, between bus 3 and the vertical bus 3, lap-joint all adopts 10 sealings of isolated bus box; Vertical bus 3, horizontal bus 3 whole copper bars are applied mechanically thermoplastic tube, the thermoplastic insulation of good insulation preformance.Neutral ground bus 3 adopts hard copper row to connect horizontal neutral earth connection (PEN) or ground connection+neutrality; Adopt cable in cabinet bottom outlet method, allot line copper bar binding post 8 all in the cabinet bottom at the bottom of the cabinet 600mm, cable is easy to connect, and the available extension dedicated three-phase ground connection card that has a power failure.

Among Fig. 1, incoming line cabinet in framework universal circuit breaker chamber 5, installing frame posture universal circuit breaker 4; 7 li of the compensation condenser chambers of face closure before the cabinet bottom, capacitance compensation controllable silicon master switch 8 is installed on top, lower curtate is installed compensation condenser 12, the electric capacity that compensation condenser chamber 7 cabinet faces are settled compensates instrument 18 automatically, have the distribution monitor concurrently, simultaneously monitor voltage, electric current, active power, reactive power and conveying signal etc., compensation condenser 12 switches the employing dual system, work in coordination with circuit contacts device and capacitance compensation controllable silicon master switch 8, improve the operation power consumption of configuration effort reliability and reduction electronic switch.

Among Fig. 2, feeder line cabinet cancellation bus disconnection switch adopts and extracts circuit breaker 20 out, has double break mouth, double space during disjunction, can add the padlock locking in addition; Dark 800mm before and after the feeder line cabinet, forward and backward two sides is all operating surface, 6 630A is installed altogether extracts 20, one feeder line cabinets of circuit breaker out and allot 6 times 630A and allot line; Extract circuit breaker out and have compound protection or intelligent control defencive function, can select according to the requirement of cable capacity.

Among Fig. 3, anterior down measuring instrument and the table of merit rating 21 installed of interconnection cabinet, following rear portion headspace (22) can replenish incoming line cabinet because the compensation condenser 12 that can't increase is limit in the space, to satisfy the capacity requirement of 630Kva transformer to building-out capacitor in order to compensation condenser 12 to be installed.

Claims

1. A low-voltage withdrawable circuit breaker closed switchgear, which is connected by a low-voltage switch and related electrical and mechanical equipment with a busbar, and is completely assembled into a combination of an incoming line cabinet, a feeder line cabinet and a connection cabinet with structural components. Its characteristics The inside of the switchgear is divided into small rooms according to their functions, the outside of the busbar (3) is covered with insulating materials, and the outgoing cables (13) adopt the way of outgoing lines from the lower part of the cabinet; A switch (8) is equipped with a compensating capacitor (12) at the bottom; a withdrawable circuit breaker (20) is used in the feeder cabinet; a space (22) is reserved at the lower part of the contact cabinet.

2. The switchgear according to claim 1, characterized in that the front and rear depths of the feeder cabinet are 800 mm, the front and rear sides are both operation surfaces, and the withdrawable circuit breakers (20) can be installed on both sides.

3. The switchgear according to claim 1 or 2, characterized in that, the feeder cabinet can be installed with 6 sets of 630A withdrawable circuit breakers (20), and 6 circuits of 630A distribution lines can be distributed.

4. The switchgear according to claim 1, characterized in that, the distribution cables (13) are all at the lower part of the cabinet 600mm from the bottom of the cabinet, and the cable terminals (11) are at the same height, and can be hung with a special three-phase grounding card (twenty three).

5. The switchgear according to claim 1, characterized in that, the compartments divided inside the switchgear are a busbar compartment (1), a frame universal circuit breaker compartment (5), a compensating capacitor compartment (7), a cable compartment (14 ), the instrument room (17) and the circuit breaker room (19), each room is equipped with a special door; in the cabinet, between the busbars (3) and the busbars (3), the lap joints are all sealed with insulating busbar boxes (10).