CN202267738U

CN202267738U - Function expansion device of air main circuit breaker test bed

Info

Publication number: CN202267738U
Application number: CN2011203625317U
Authority: CN
Inventors: 张建福
Original assignee: CSR Luoyang Locomotive Co Ltd
Current assignee: CRRC Luoyang Locomotive Co Ltd
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2012-06-06
Anticipated expiration: 2021-09-26

Abstract

The utility model belongs to the technical field of detection of electrical test beds and provides a function expansion device of an air main circuit breaker test bed. The function expansion device is arranged between a test bed and a vacuum circuit breaker and is connected with the vacuum circuit breaker to constitute three closed loops connected in parallel; a switching button connected with a DC (Direct Current) 110V power supply is connected with a reflux-prevention diode in series, is connected with a time-delay relay in the vacuum circuit breaker, and constitute the first closed loop together with an electromagnetic valve in the vacuum circuit breaker; a DC power supply point constituted by another path of DC 110V power supply is connected with a normally-closed contact of an intermediate relay KA in series so as to connect a self-locking normally-open contact in the vacuum circuit breaker and a holding coil in the vacuum circuit breaker with two ends of the normally-closed contact of the intermediate relay KA in series respectively, thereby constituting the second closed loop; and the switching button is connected with a coil of the intermediate relay KA in series to constitute the third closed loop. According to the utility model, not only can the test requirement of the air circuit breaker be met, but also the test requirement of the vacuum circuit breaker can be met.

Description

The function expanding device of line air blast circuit breaker testing table

Technical field

The utility model belongs to electrical test bench detection technique field, relates generally to a kind of function expanding device of line air blast circuit breaker testing table.

Background technology

The electric locomotive that produce domestic decades in the past adopts TDZI (A) type line air blast circuit breaker (hereinafter to be referred as air-break) as main circuit breaker mostly, and the main circuit breaker that the Passenger Electric Locomotive of current electric locomotive of newly making and production later in 2000 adopts is mainly BVAC N99 type line vacuum circuit breaker (hereinafter to be referred as vacuum circuit breaker).So new requirement is proposed also in rig for testing; Mostly the main circuit breaker testing table that before is equipped with is the air-break testing table; Because vacuum circuit breaker is different with the mode of operation of air-break, causes original equipment can't adapt to the testing requirements of vacuum circuit breaker, the main circuit breaker of obviously changing original electric locomotive also is impossible; And the vacuum circuit breaker rig for testing is comparatively expensive; Therefore be necessary existing air-break testing table function is expanded, make it not only can satisfy the testing requirements of air-break, can satisfy the testing requirements of vacuum circuit breaker simultaneously.

Summary of the invention

For solving the problems of the technologies described above, the purpose of the utility model is the function expanding device that proposes a kind of line air blast circuit breaker testing table, makes its testing requirements that can satisfy air-break, can satisfy the testing requirements of vacuum circuit breaker simultaneously again.

The technical scheme that its invention task of the utility model completion is taked is:

A kind of function expanding device of line air blast circuit breaker testing table, described function expanding device are arranged between line air blast circuit breaker testing table and the vacuum circuit breaker; The testing table function expanding device connects the closed-loop path that the back constitutes three parallel connections with vacuum circuit breaker; The switch knob that is connected with testing table DC110V power supply is connected in series with the anti-return diode, in order to vacuum circuit breaker in timing relay be connected, and common constitute a closed-loop path with solenoid valve in the vacuum circuit breaker; The DC supply point that another road DC110V power supply constitutes is connected in series with the normally closed contact of auxiliary reclay KA; Be serially connected in the two ends of auxiliary reclay KA normally closed contact respectively in order to holding coil, constitute second closed-loop path the self-locking normally opened contact in the vacuum circuit breaker, vacuum circuit breaker; Opening button is connected with the coil of auxiliary reclay KA and is constituted the 3rd closed-loop path.

The principle of work of the function expanding device of line air blast circuit breaker testing table is: press the testing table switch knob; The vacuum circuit breaker solenoid valve gets electronic work, opens gas circuit, under compressed-air actuated effect, accomplishes closing operation; Timing relay cut off power of electromagnetic valve after 0.6 second, turn-off source of the gas; Self-locking normally opened contact in the vacuum circuit breaker is closed; Through auxiliary reclay KA normally closed contact call through test platform DC supply point; Even unclamp switch knob like this, the vacuum circuit breaker holding coil still can get electric from DC supply point, and vacuum circuit breaker is remained on "on" position; During separating brake, press the testing table opening button, auxiliary reclay KA coil gets electric adhesive; Driving its normally closed contact breaks off; The outage of vacuum circuit breaker holding coil loses the maintenance effect, and vacuum circuit breaker is accomplished sub-switching operation under the recovery mechanism effect that carries, and the self-locking normally opened contact in the vacuum circuit breaker breaks off simultaneously; Even the testing table opening button is unclamped like this, testing table direct current supply path still is cut off and makes vacuum circuit breaker be in gate-dividing state.

The function expanding device of a kind of line air blast circuit breaker testing table that the utility model proposes can satisfy the testing requirements of air-break, can satisfy the testing requirements of vacuum circuit breaker simultaneously again.

Description of drawings

Fig. 1 is the functional-block diagram of the utility model.

Fig. 2 is the user mode electrical schematic diagram of the utility model.

Embodiment

In conjunction with accompanying drawing and specific embodiment the utility model is further specified:

Like Fig. 1, shown in Figure 2, a kind of function expanding device of line air blast circuit breaker testing table, described function expanding device are arranged between 20 core plugs of 20 core plugs and vacuum circuit breaker of line air blast circuit breaker testing table; The testing table function expanding device connects the closed-loop path that the back constitutes three parallel connections with vacuum circuit breaker; The switch knob that is connected with testing table DC110V power supply is connected in series with the anti-return diode, in order to vacuum circuit breaker in timing relay be connected, and common constitute a closed-loop path with solenoid valve in the vacuum circuit breaker; The DC supply point that another road DC110V power supply constitutes is connected in series with the normally closed contact of auxiliary reclay KA; Be serially connected in the two ends of auxiliary reclay KA normally closed contact respectively in order to holding coil, constitute second closed-loop path the self-locking normally opened contact in the vacuum circuit breaker, vacuum circuit breaker; Opening button is connected with the coil of auxiliary reclay KA and is constituted the 3rd closed-loop path.

Claims

1. the function expanding device of a line air blast circuit breaker testing table, it is characterized in that: described function expanding device is arranged between line air blast circuit breaker testing table and the vacuum circuit breaker; The testing table function expanding device connects the closed-loop path that the back constitutes three parallel connections with vacuum circuit breaker; The switch knob that is connected with testing table DC110V power supply is connected in series with the anti-return diode, in order to vacuum circuit breaker in timing relay be connected, and common constitute a closed-loop path with solenoid valve in the vacuum circuit breaker; The DC supply point that another road DC110V power supply constitutes is connected in series with the normally closed contact of auxiliary reclay KA; Be serially connected in the two ends of auxiliary reclay KA normally closed contact respectively in order to holding coil, constitute second closed-loop path the self-locking normally opened contact in the vacuum circuit breaker, vacuum circuit breaker; Opening button is connected with the coil of auxiliary reclay KA and is constituted the 3rd closed-loop path.