CN201623393U

CN201623393U - Removable arc and resonance suppression device

Info

Publication number: CN201623393U
Application number: CN2009201804226U
Authority: CN
Inventors: 刘亮
Original assignee: SHANGHAI ZHONGFEI ELECTRIC POWER EQUIPMENT CO Ltd
Current assignee: SHANGHAI ZHONGFEI ELECTRIC POWER EQUIPMENT CO Ltd
Priority date: 2009-11-10
Filing date: 2009-11-10
Publication date: 2010-11-03
Anticipated expiration: 2019-11-10

Abstract

The utility model relates to a removable arc and resonance suppression device, which comprises a casing. A closed space encircled by the casing is divided into a main bus chamber, a ground switch chamber, a voltage transformer chamber and a second instrument chamber via metal partitions according to functions, the main bus chamber is arranged at the rear of the casing, the secondary instrument chamber, the voltage transformer chamber and the ground switch chamber are sequentially arranged in the front of the casing from top to bottom, and a disconnection handcart is arranged in the voltage transformer chamber, provided with a voltage transformer and a high-voltage fuse and pushed in or pulled out from a cabinet along guide tracks. The middle in the front of a KYN28 type switch cabinet is used as a disconnection handcart chamber, the disconnection handcart provided with the voltage transformer and the high-pressure fuse is arranged in the handcart chamber and used as a removable component, and an outgoing cable chamber is used as the ground switch chamber, thereby resolving the difficult problem of element arrangement space in miniaturization of protection devices and guaranteeing normal performance of protection function.

Description

Movable arc-suppression harmonic elimination device

Technical field

The utility model relates to a kind of movable arc-suppression harmonic elimination device.

Background technology

The extinguishing arc harmonic elimination apparatus of using in the present system, mostly be the stationary structure that has the fuse of connecting, in case single-phase arc grounding fault takes place in system, by with the vacuum contactor of high-voltage and current-limitation fuse series connection with fault direct ground connection mutually, ground arc is extinguished, the arc grounding overvoltage is eliminated thereupon, thereby has avoided becoming the phase fault accident by single-phase arc grounding fault progression.Though vacuum contactor has satisfied the requirement of extinguishing arc harmonic elimination apparatus frequent operation, but can't cut-off short circuit current, the use of must connecting with high-voltage and current-limitation fuse, and high-voltage and current-limitation fuse need take space in the bigger cabinet, whole extinguishing arc harmonic elimination apparatus can only adopt stationary structure, and can't adopt KYN38 type switch cabinet, this becomes a great problem of switchgear miniaturization.In addition, when changing high-voltage and current-limitation fuse or maintenance inner member, all need whole extinguishing arc harmonic elimination apparatus is all had a power failure, increased Field Force's workload.

The appearance of the Fast Speed Vacuum Circuit Breaker of phase-splitting control, for switching regulator extinguishing arc harmonic elimination apparatus is introduced the condition created to the market, also, switching regulator extinguishing arc harmonic elimination apparatus lays a good foundation for adopting the handcart-type cabinet body structure, but for fuse wire type extinguishing arc harmonic elimination apparatus, the needed installing space problem of components and parts also remains a big obstacle of realizing that the handcart-type cabinet body structure can't be gone beyond in the cabinet.

The utility model content

The purpose of this utility model is to provide a kind of miniaturization, be convenient to the movable arc-suppression harmonic elimination device that keeps in repair and change.

For achieving the above object, the utility model has adopted following technical scheme: movable arc-suppression harmonic elimination device, comprise the cabinet shell, metal partion (metp) is divided into the main bus bar chamber with the enclosure space that the cabinet shell surrounds by function, the earthed switch chamber, voltage transformer chamber and secondary meter chamber, described main bus bar chamber is positioned at the rear of cabinet shell, the place ahead of cabinet shell is furnished with the secondary meter chamber from top to bottom successively, voltage transformer chamber and earthed switch chamber, described transformer indoor is provided with the isolation handcart, isolate voltage transformer and high-tension fuse are installed on the handcart, the isolation handcart pushes in the cabinet or in cabinet along guide rail pulls out.

As shown from the above technical solution; the utility model utilizes the medium position in KYN28 type switch cabinet the place ahead as isolating the handcart chamber; and the isolation handcart that voltage transformer and high-tension fuse is installed in the indoor layout of handcart is as removing parts; utilize the outlet cable vault as the earthed switch chamber; solve protective device and realized the arrangements of elements space problem that miniaturization can't be gone beyond, guaranteed the normal performance of defencive function simultaneously.

Description of drawings

Fig. 1 is an electric primary system winding diagram of the present utility model;

Fig. 2 is an internal structure schematic diagram of the present utility model;

Fig. 3 is an external structure schematic diagram of the present utility model.

Embodiment

Movable arc-suppression harmonic elimination device, comprise cabinet shell 50, observation window 52 is set on the cabinet shell 50 observes the internal operation situation of this device for the user, metal partion (metp) is divided into main bus bar chamber 10 with the enclosure space that cabinet shell 50 surrounds by function, earthed switch chamber 20, voltage transformer chamber 30 and secondary meter chamber 40, described main bus bar chamber 10 is positioned at the rear of cabinet shell 50, secondary meter chamber 40 is arranged in the place ahead of cabinet shell 50 from top to bottom successively, voltage transformer chamber 30 and earthed switch chamber 20, be provided with in the described voltage transformer chamber 30 and isolate handcart 31, isolation handcart 31 pushes in the cabinet or in cabinet along guide rail 31a pulls out.Isolate voltage transformer 36 and high-tension fuse 35 are installed on the handcart 31, also be provided for indicating the handcart position indicator 51 of isolating handcart 31 operating states on the described cabinet shell 50.In the described secondary meter chamber 40 microcomputer general controller 41 is set, the secondary control loop of phase-splitting earthed switch 21 links to each other with microcomputer general controller 41 with secondary cable by aviation plug 25, shown in Fig. 2,3, described the place ahead is meant that the staff faces the direction of cabinet when operation.

In conjunction with Fig. 2,3, the upper right quarter in described cabinet shell 50 the place aheads is secondary meter chamber 40, and the lower left quarter in cabinet shell 50 the place aheads is earthed switch chamber 20, and voltage transformer chamber 30 is between secondary meter chamber 40 and earthed switch chamber 20.Main bus bar chamber 10, voltage transformer chamber 30, earthed switch chamber 20 all are provided with independently pressure release passage, cause the gross distortion of cabinet body structure to prevent internal fault.Secondary meter chamber 40 isolates each other fully with main bus bar chamber 10, voltage transformer chamber 30, earthed switch chamber 20, guaranteed the safety of maintenance, debugging and in-service inspection, and any compartment interior fault all can't feed through to other compartments.

In conjunction with Fig. 1,2, be provided with in the described main bus bar chamber 10 from wall bushing 12 across and into the three-phase main bus bar 11 in the cabinet shell 50, the three-phase main bus bar 11 that is positioned at cabinet shell 50 inside is supported by post insulator, and draw three branch bars 13 respectively with isolate handcart 31 on three upper static contacts 37 link to each other, upper static contact 37 is positioned at upper contact head box 37a.Go up moving contact 32 and fix for three of described isolation handcart 31 by the last contact arm 32b that is arranged in contact arm sleeve pipe 32a, the following contact arm 33b of contact arm sleeve pipe 33a fixes three lower moving contacts 33 of isolation handcart 31 by being arranged in down, last moving contact 32 and lower moving contact 33 are connected row's 34 connections by contact up and down, one of three high-tension fuses 35 terminate on the lower moving contact 33, the input of another termination voltage transformer 36, the other end ground connection of voltage transformer 36.Voltage transformer 36 in the described voltage transformer chamber 30, high-tension fuse 35 and the accessories such as dynamic/static contact of isolating on the handcart 31 are general parts, has good interchangeability, be pulled out to the maintenance position as long as will isolate handcart 31, just can change or overhaul said elements quickly and easily.In addition; the door of earthed switch chamber 20 is behind cabinet; as long as open the cabinet door; change and overhaul all very convenient to wherein phase-splitting earthed switch 21, overvoltage protection device 24, current transformer 23 etc.; above-mentioned this structure has realized the exchange of critical piece, for improving overhaul efficiency, shorten maintenance duration, reducing space for maintenance and created good condition.

In conjunction with Fig. 1,2; in the described earthed switch chamber 20 phase-splitting earthed switch 21 is set; the last leading-out terminal of phase-splitting earthed switch 21 is connected with the following fixed contact 38 of isolating handcart 31 by connecting copper bar; the lower wire end of phase-splitting earthed switch 21 is a common port by connecting the copper bar parallel connection; this common port passes current transformer 23 and receives on the earth bus 26 through earth cable 22; the input of overvoltage protection device 24 is connected on three following fixed contacts 38 of isolating handcart 31, the output head grounding of overvoltage protection device 24.Described phase-splitting earthed switch 21 is the phase-splitting Fast Speed Vacuum Circuit Breaker, perhaps is composed in series by high-voltage and current-limitation fuse and vacuum contactor.Described overvoltage protection device 24 comprises the zinc oxide valve plate FR that four head ends join; wherein the tail end of first, second and third zinc oxide valve plate FR1, FR2, FR3 is connected respectively and is connected on behind first, second and third discharging gap CG1, CG2, the CG3 on the following fixed contact 38 of isolating handcart 31, the tail end of the 4th zinc oxide valve plate FR4 ground connection behind the 4th discharging gap CG4 of connecting.The protective feature relatively and the alternate protective feature of overvoltage protection device 24 are identical, can not only limit lightning overvoltage and can also limit the electrical network internal overvoltage, and can not only limiting relatively, overvoltage can also limit alternate overvoltage.

Below in conjunction with Fig. 1,2,3 the utility model will be further described.

Be pushed into the service position as long as will isolate handcart 31, it is just charged to be in the high pressure winding of isolating the voltage transformer 36 on the handcart 31, the upper contact head that is in three phase-splitting earthed switches 21 in the earthed switch chamber 20 is also charged simultaneously, and whole device enters the running status of warming-up exercise.Microcomputer general controller 41 is by voltage transformer 36 real-time monitoring system working voltages, in case single-phase arc grounding fault takes place in system, just can make fast and judge and send the order of closing a floodgate to the phase-splitting earthed switch 21 of fault phase, fault phase bus directly links to each other with ground network by phase-splitting earthed switch 21, has finished by the conversion of single-phase arc grounding to Single Phase Metal ground connection.System's single-phase fault current signal of sending here by the current transformer 23 of ground connection, microcomputer general controller 41, intuitively and has compactly solved long-standing system single-phase earth fault electric current and has estimated inaccurate problem in the single-phase earth fault current steady-state value that can demonstrate exactly on its panel under the current operational mode of system through data processing.

When system's generation single phase ground fault, phase-splitting earthed switch 21 can move about 30ms, with the direct mutually ground connection of fault; If single-phase arc grounding fault takes place, then can extinguish ground arc rapidly and the arc grounding overvoltage is stablized the lsafety level of on-Line Voltage, can effectively avoid the phase fault accident that causes because of arc grounding and accidents such as the ferro resonance that causes because of the arc grounding overvoltage and Explosion of on Arrester; If the metallic earthing fault takes place, then can reduce touch voltage and step voltage greatly, help support equipment and personal safety.Simultaneously, when system's generation single phase ground fault, this device can also be selected faulty line quickly and accurately.

When disconnection fault takes place in voltage transformer 36; microcomputer general controller 41 output switching value contact point signals; so that the user is to causing the relaying protection of misoperation to carry out locking because of voltage transformer 36 broken strings; send alarm signal simultaneously; the panel of microcomputer general controller 41 shows fault type (voltage transformer 30 broken strings; earth fault) and separate, output passive switch amount contact point signal.In addition, this device has the emergency review function, the associated electrical tolerance in the time of can writing down the type of time that 18 faults take place and fault and fault.This device has also disposed the RS485 interface, can carry out data according to the communication protocol that the user provides and transmit.Voltage transformer 36 in this device can provide the secondary voltage signal to measuring instrument and relaying protection, and microcomputer general controller 41 also has overvoltage and low-voltage warning function, and this device can replace conventional PT cabinet fully.

In a word; core of the present utility model is to utilize the middle part of KYN28 type switch cabinet that isolation handcart 31 is set; and isolating layout voltage transformer 36 and high-tension fuse 35 on the handcart 31; utilize the outlet cable vault as earthed switch chamber 20 simultaneously; in earthed switch chamber 20, arrange the elements such as current transformer 23 of phase-splitting earthed switch 21, overvoltage protection device 24 and ground connection; solved protective device and realized the arrangements of elements space problem that miniaturization can't be gone beyond, guaranteed unsettled single-phase arc grounding fault is converted into stable Single Phase Metal ground connection fast.

Claims

1. movable arc-suppression harmonic elimination device, comprise cabinet shell (50), metal partion (metp) is divided into main bus bar chamber (10) with the enclosure space that cabinet shell (50) surrounds by function, earthed switch chamber (20), voltage transformer chamber (30) and secondary meter chamber (40), it is characterized in that: described main bus bar chamber (10) is positioned at the rear of cabinet shell (50), the place ahead of cabinet shell (50) is furnished with secondary meter chamber (40) from top to bottom successively, voltage transformer chamber (30) and earthed switch chamber (20), be provided with in the described voltage transformer chamber (30) and isolate handcart (31), isolate handcart (31) and go up voltage transformer (36) and high-tension fuse (35) are installed, isolating handcart (31), to push cabinet along guide rail (31a) interior or pull out in cabinet.

2. movable arc-suppression harmonic elimination device according to claim 1, it is characterized in that: the upper right quarter in described cabinet shell (50) the place ahead is secondary meter chamber (40), the lower left quarter in cabinet shell (50) the place ahead is earthed switch chamber (20), and voltage transformer chamber (30) are positioned between secondary meter chamber (40) and earthed switch chamber (20).

3. movable arc-suppression harmonic elimination device according to claim 2, it is characterized in that: be provided with in the described main bus bar chamber (10) from wall bushing (12) across and into the three-phase main bus bar (11) in the cabinet shell (50), being positioned at the inner three-phase main bus bar (11) of cabinet shell (50) is supported by post insulator, and draw three branch bars (13) and link to each other with three upper static contacts (37) of isolating handcart (31) respectively, upper static contact (37) is positioned at upper contact head box (37a).

4. movable arc-suppression harmonic elimination device according to claim 2, it is characterized in that: go up moving contact (32) and fix for three of described isolation handcart (31) by the last contact arm (32b) that is arranged in contact arm sleeve pipe (32a), three lower moving contacts (33) of isolating handcart (31) are fixing by the following contact arm (33b) of contact arm sleeve pipe (33a) under being arranged in, last moving contact (32) and lower moving contact (33) are connected row (34) connection by contact up and down, one of three high-tension fuses (35) terminate on the lower moving contact (33), the input of another termination voltage transformer (36), the other end ground connection of voltage transformer (36).

5. movable arc-suppression harmonic elimination device according to claim 2; it is characterized in that: phase-splitting earthed switch (21) is set in the described earthed switch chamber (20); the last leading-out terminal of phase-splitting earthed switch (21) is connected with the following fixed contact (38) of isolating handcart (31) by connecting copper bar; following fixed contact (38) is positioned at contact box (38a) down; the lower wire end of phase-splitting earthed switch (21) is a common port by connecting the copper bar parallel connection; this common port passes current transformer (23) and is connected to earth bus (26) through earth cable (22); the input of overvoltage protection device (24) is connected on three following fixed contacts (38) of isolating handcart (31), the output head grounding of overvoltage protection device (24).

6. movable arc-suppression harmonic elimination device according to claim 2, it is characterized in that: microcomputer general controller (41) is set in the described secondary meter chamber (40), and the secondary control loop of phase-splitting earthed switch (21) links to each other with microcomputer general controller (41) with secondary cable by aviation plug (25).

7. movable arc-suppression harmonic elimination device according to claim 5 is characterized in that: described phase-splitting earthed switch (21) is the phase-splitting Fast Speed Vacuum Circuit Breaker, perhaps is composed in series by high-voltage and current-limitation fuse and vacuum contactor.

8. movable arc-suppression harmonic elimination device according to claim 5; it is characterized in that: described overvoltage protection device (24) comprises the zinc oxide valve plate (FR) that four head ends join; wherein the tail end of first, second and third zinc oxide valve plate (FR1, FR2, FR3) is connected respectively and is connected on behind first, second and third discharging gap (CG1, CG2, CG3) on three following fixed contacts (38) of isolating handcart (31), the tail end of the 4th zinc oxide valve plate (FR4) the 4th discharging gap (CG4) the back ground connection of connecting.