Two unit common box type gas-filled type high voltage switchgears
The utility model relates to a kind of high voltage switchgear, refers in particular to a kind of collection two unit common box type gas-filled type high voltage switchgears.
In high voltage electrical apparatus technical field, the gas-filled type high voltage switchgear is a kind of three-phase alternating current indoor high voltage switchgear.Adopt modularized design, the perfect unity of and flexible expansion fixed with it, to be fit to the requirement of electric power system terminal use or network node, to satisfy various distribution switching stations, box-type substation simultaneously, have compact conformation, long-life, non-maintaining, characteristics that volume is little.Belong to a kind of control and protection electrical equipment.(3.6kV～24kV) the gas-filled type high voltage switchgear is the high voltage switchgear of new generation that last century, the nineties was risen to middle the pressure, and little with its volume, antipollution obtains users' approval very soon, and application surface is more and more wider.Present most of producer only releases 1 unit gas-filled type switchgear, mainly based on rated current 630A, specified drop-out current 20KA, be difficult to adapt to large user's requirement, the vacuum circuit-breaker bottom of existing equipment there is no necessary earthed switch is set in addition, Product Safety is not high, can't guarantee user's personal safety, and adorn all insulation gas-filled type high voltage switchgear of vacuum circuit-breaker and earthed switch in the bigger capacity, also in the world at present not occur.
[summary of the invention]
The purpose of this utility model is to have overcome above-mentioned defective, a kind of big capacity double circuit power supply is provided and meets the two unit common box type gas-filled type high voltage switchgears that satisfy existing electric power system requirement.
The purpose of this utility model is achieved in that a kind of two unit common box type gas-filled type high voltage switchgears, its improvements are: it includes instrument and switching mechanism installation room, charging compartment and cable vault, cable vault's upper inner is provided with charging compartment, arranged outside instrument and switching mechanism installation room; In air chamber, be sealed with two cover high pressure major loops side by side, it mainly is made up of top-down tri-station isolating switch, solid sealed pole of vacuum circuit breaker and earthed switch, and the tri-station isolating switch and the rotary type vacuum breaker operation mechanism of corresponding every cover high pressure major loop respectively then are installed in instrument before the air chamber and the switching mechanism installation room;
Be sealed with vacuum interrupter in the described pole, the quiet end of vacuum interrupter is electrically connected the cable duct tube of using as the turnover line in the cable vault, the moved end is electrically connected the middle T connector seat of tri-station isolating switch, the tail end of pole also is connected with tri-station isolating switch, uses as the tri-station isolating switch fixed support; Insulated tension pole and the rotary type vacuum breaker operation mechanism interlock of described pole vacuum interrupter moved end by being provided with;
Described tri-station isolating switch is fixed on the pole;
Described cable vault and charging compartment joint are provided with cable duct tube;
Corresponding two cover high pressure major loops are provided with two groups of current transformers, two groups of voltage transformers and one group of ups power in the described cable vault.
Than common high voltage switchgear, the beneficial effects of the utility model are by two cover high tension loop and the corresponding assemblies of configuration in the charging compartment of a casing, and tri-station isolating switch, vacuum circuit-breaker and earthed switch are arranged from top to bottom, the poles of the vacuum circuit-breaker of two cover high tension loops are and combination such as are arranged side by side and have increased earthed switch to adopt high tension loop, and the big capacity high switchgear of the actual motion capacity requirement that can satisfy electric power system is provided.Can be used as the duplicate supply user simultaneously and the ring network power supply duplicate supply comes into operation mutually, can realize easily that duplicate supply throws locking mutually, improved the electric reliability of power supply.The each several part modularity is stronger in the equipment, not only is convenient to the digital control processing manufacturing of each intermodule, also can effectively improve the interchangeability and the reliability of its parts, has filled up world's blank of this type product, and the versatility of complete machine and standardization level height are convenient to make and safeguard.
[description of drawings]
Below in conjunction with accompanying drawing in detail concrete structure of the present utility model is described in detail
Fig. 1 is a structural representation of the present utility model
Fig. 2 is a structure cutaway view 1 of the present utility model
Fig. 3 is a structure cutaway view 2 of the present utility model
Below in conjunction with accompanying drawing the utility model specific embodiment is described in detail.
As shown in Figure 1, the utility model relates to a kind of two unit common box type gas-filled type high voltage switchgears, and it includes cable vault 3, and cable vault's 3 upper inner are provided with charging compartment 2, arranged outside instrument and switching mechanism installation room 1.
Referring to Fig. 2,3, two groups or one group of three-phase intermediate connector 201 are set in air chamber 2 tops, can make device left or infinite expanding to the right: the corresponding two cover high pressure major loops that also are sealed with side by side within it, it mainly is made up of tri-station isolating switch 202, solid sealed pole of vacuum circuit breaker 203 and the earthed switch 204 arranged from top to bottom, and arrangement like this can effectively ensure in limited bulk, the problem of solid sealed pole of vacuum circuit breaker 203 upper and lower end reliable grounds.The tri-station isolating switch 101 and the rotary type vacuum breaker operation mechanism 102 of corresponding every cover high pressure major loop respectively then are installed in instrument before air chamber 2 and the switching mechanism installation room 1.The solid sealed pole of vacuum circuit breaker 203 of described two cover high tension loops are and are arranged side by side, in pole 203, be sealed with vacuum interrupter, described tri-station isolating switch 202 respectively with three-station 101, the vacuum interrupter moved end is electrically connected in the solid sealed pole of vacuum circuit breaker 203, and be fixed on the solid sealed pole of vacuum circuit breaker 203 by other end support and connection rows, tri-station isolating switch 101 links to each other with drive lead screw in the air chamber 2 by the movable sealing of rotary magnetic fluid, tri-station isolating switch 202 is seesawed, reach conduction position, the centre position, three functions of earthing position.102 interlocks of the insulated tension pole of pole 203 vacuum interrupter moved ends and rotary type vacuum breaker operation mechanism, and quiet end links to each other with cable front connector 302 in the cable vault 3 by the turnover line cable duct tube 301 that connects busbar 205 and 3 joints, air chamber subjacent cable chambers 2 and be provided with; Earthed switch 204 is set and is provided with fixed contact 206 in connecting busbar 205 middle part correspondence positions; after equipment closes earthed switch 204; earthed switch 204 links to each other with fixed contact 206, thereby guarantees solid sealed pole of vacuum circuit breaker 203 lower end reliable grounds, has reached the security purpose of the protection person.Corresponding two cover high pressure major loops are provided with two groups of current transformers and voltage transformer, one group of 303UPS power supply in cable vault 3.Connection busbar 205 tail ends of described solid sealed pole of vacuum circuit breaker 203 also are connected with voltage transformer connection busbar 304 and are connected into voltage transformer 303 by cable duct tube 305.
It is to be noted; the utility model is not limited to above-mentioned execution mode; any simple modification, equivalent variations and modification that any those skilled in the art do the foregoing description in based on technical solutions of the utility model all belong in the protection range of the present utility model.