CN2521797Y - Indoor metal-clad with drawable switch equipment - Google Patents

Abstract

The utility model relates to a switch device of the power system. The switch device comprises a breaker chamber, a busbar chamber, a cable chamber, a relay and instrument chamber. A current transformer and a static contact of the device is designed into a splitting and assembling structure, which consists of a straight-through current transformer (including a contact case) and a static contact pedestal. The straight-through current transformer is arranged on an installation plate of the contact case, while the static contact and a bracket are fixed on a cabinet body. The art meets the requirement that the cabinet body is arranged close to a wall, maintenance is conducted in front of the cabinet, and the cabinet dimension is small. With the structure, an operator does not have to creep into the cabinet to disassemble, assemble or repair the current transformer as before, so the physical burden of the maintenance operator is reduced.

Description

A kind of indoor metal armoring draw out switchgear

The utility model relates to a kind of switchgear of electric power system.

The indoor metal armoring draw out switchgear volume that has used at present is big, safeguard not really for convenience detach, detection difficult, current transformer is safeguarded in the electric component, test volume is big, and adopts the bus transition to be connected between fixed contact and the current transformer, and the space is bigger.

At the defective of above-mentioned existence, the utility model provides a kind of and satisfies cabinet by the wall installation, safeguards the indoor metal armoring draw out switchgear of small size before the cabinet.

The purpose of this utility model is achieved in that current transformer and fixed contact is designed to a kind of assembled structure of partly being made up of straight-through current transformer (containing contact box) and stationary contact headstock two, straight-through current transformer is installed on the contact box mounting panel, and fixed contact and bearing are fixed on cabinet.

After adopting the technical solution of the utility model, having omitted the bus transition connects, compressed the space, simultaneously this structure both satisfied current transformer can dismounting before cabinet, test, having satisfied current transformer contact base owing to fixed contact and poured with epoxy resin after dismounting and replacing again is to be fixed on the switch cubicle, its cooperation position with dispatch from the factory the same, this interchangeability that has just guaranteed on-the-spot handcart is consistent when dispatching from the factory, this structure need not to resemble in the past the operator and climbs into the product carries out dismounting and safeguards current transformer in the cabinet, alleviated attendant's physical load, secondly main bus bar is arranged to adopt and vertically stand up layout, compressed volume effectively, thereby realization equipment is installed by wall, safeguards the requirement of small size before the cabinet.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is a front schematic view of the present utility model.

Fig. 2 is a side schematic view of the present utility model.

Among Fig. 1 and Fig. 2, A is the main bus bar chamber, and B is a breaker chamber, C is the cable vault, and D is the relay control room, and 1 is shell, 2 is median septum, and 3 is grounding contact, and 4 is guide rail, 5 is circuit breaker cart, and 6 is heater, and 7 is secondary plug and interlocking, 8 is the valve hoisting mechanism, and 9 is pressure relief device, and 10 is wall bushing, 11 is shrouding, and 12 is main bus bar, and 13 is the contact box mounting panel, 14 are current transformer (containing contact box), and 15 is the fixed contact bearing, and 16 is jam plate mechanism, 17 is the breaker chamber door, and 18 is the earthed switch operating axis, and 19 is shrouding behind the cable vault, 20 is the Qianmen, cable vault, 21 is earthed switch, and 22 is cable, and 23 is earth bus.Switchgear adopts the middle structure, is made up of cabinet and withdrawable parts (middle handcart), and the cabinet shell adopts aluminizing zinc sheet metal or general steel plate after the processing of punching press double bending, is formed by connecting with riveted bolt.

This cabinet by four independently compartment form, that is: breaker chamber, the main bus bar chamber, cable vault, relay control room four parts, its shell protection grade is IP4X, between each compartment and breaker chamber door when opening, degree of protection is IP2X, and other all has separately independently exhaust passage and pressure relief device except that the relay control room in the compartment, when producing internal fault electric arc, pressure release window is opened automatically, discharges internal pressure, and does not influence other compartment, the valve hoisting mechanism is installed on two side rails, hoisting mechanism adopts valve self-movement up and down, when detecting, and can be with charged side valve locking, thereby guaranteed that the maintainer does not touch electrified body, to guarantee its safety.Secondary plug and interlocking are installed on the breaker chamber top, handcart only just can insert and remove secondary plug when test/open position, when handcart is in the service position, because the effect of mechanical interlocking, secondary plug is locked, to have increased the reliability of power supply, simultaneously there is not this defective of grounded circuit in test position at intermediate switchgear cabinet handcart in the past, on the breaker chamber median septum, increased grounding contact, make handcart no matter in test, between service position and test position and the service position, handcart all is in the complete grounded circuit, has guaranteed operations staff's safety like this.Be provided with 6 * 50mm in the bottom, cable vault ²The ground connection copper bar, the ground connection copper bar is horizontally disposed with along the cabinet orientation, the interior earth bus of cabinet directly is connected with the ground connection copper bar makes all electric elements and cabinet and complete grounding system of ground connection busbar formation in the cabinet, breaker chamber and cable vault's door lock are designed to jam plate and stir jam plate formula structure up and down, lock more firm, reliable, produce condensation in order to prevent that product is used in the bigger climatic environment of high humility or variations in temperature, in breaker chamber and cable vault, installed heater respectively.

Handcart has three positions in cabinet, promptly there is mandatory mechanical latching open position, test position, service position between handcart and cabinet simultaneously.One, handcart is only when test or service position, circuit breaker just can close, separating brake, in case and breaker closing, handcart can't pull out from the service position or push from test position, to prevent on-load mistake push-and-pull circuit breaker cart, simultaneously, when circuit breaker cart was between test, service position, circuit breaker can not close a floodgate; Its two, have only when earthed switch during at gate-dividing state, circuit breaker cart could move to the service position from test/open position, or moves to test position from the service position, to prevent the being with earth connection mistake to close circuit breaker; Its three, when outside the circuit breaker cart during in test/open position, earthed switch just can carry out closing operation, to prevent charged mistake splice grafting ground switch; Its four, earthed switch when the separating brake position, the Qianmen and the back shrouding all can't open, prevent operating personnel's mistakenly entering charged chamber like this; Its five, indicative button is housed or with the KK type change over switch of red green board turning or coding socket, to prevent that mistake from dividing, mistake is closed circuit breaker on control room's door.Thereby fail safe, the reliability of power supply have been improved.

Claims (1)

1, a kind of indoor metal armoring draw out switchgear, comprise breaker chamber, main bus bar chamber, cable vault, relay control room, it is a kind of by straight-through current transformer (containing contact box) and stationary contact headstock assembled structure dimerous that its characteristic is that current transformer and fixed contact are designed to, and straight-through current transformer is installed on the contact box mounting panel and fixed contact and bearing are fixed on the cabinet.