CN202796517U - Load switching device for tap switch of staged transformer - Google Patents
Load switching device for tap switch of staged transformer Download PDFInfo
- Publication number
- CN202796517U CN202796517U CN 201220174575 CN201220174575U CN202796517U CN 202796517 U CN202796517 U CN 202796517U CN 201220174575 CN201220174575 CN 201220174575 CN 201220174575 U CN201220174575 U CN 201220174575U CN 202796517 U CN202796517 U CN 202796517U
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- locking side
- contact
- slave unit
- switch
- operating condition
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Abstract
The utility model relates to a load switching device for a tap switch of a staged transformer. The load switching device can still be operated even though a motion flow may be incomplete especially at a very low temperature. According to the utility model, a second latching side surface is arranged in a driving part position for each running state, wherein the second latching side surfaces are arranged in front of side surfaces used for locking the running state.
Description
Technical field
The utility model relates to a kind of load switch for shunting switch.Known this load switch from DE1956369A1.
Background technology
The accumulator drive unit of this load switch (Kraft spei cherantr i eb) must be designed for required under normal circumstances physical condition, therefore in the required time interval by the reliable electric arc extinguishing arc in the current zero-crossing point, can connect reliably single double-throw contact.Come into operation under extremely low temperature if for example under extreme weather conditions, drive now load switch, especially shunting switch, then because the viscosity ratio normal condition of oil is higher, visibly different physical condition can occur.Therefore the load switch becomes too slow within its switching time, and may not arrive at the final position, namely can not be braked at this place (verklinken).Because the interior energy of accumulator drive unit is must be under common condition consistent with the distribution sequence coordination of time, so unfortunately can not can provide assistance by enlarging the interior of accumulator drive unit, the load switch may become too fast under normal operation within its switching time for this reason, thus in cutting-off process two in time each other in succession contact also may in identical electric current half-wave, open.
The utility model content
The purpose of this utility model is, further improves aforesaid load switch, although so that its when operation when temperature is very low the motion flow process may imperfectly still can come into operation at any time.This purpose is achieved according to measure of the present utility model.
The utility model provides a kind of load switch of the shunting switch for staged transformer, it has two operating conditions, wherein closing successively main switch contact and continuous current contact from a described operating condition to the end of the handoff procedure of described another operating condition, wherein realize described handoff procedure by the accumulator drive unit, the slave unit of the described contact of operation of described accumulator drive unit is lockable by means of the pawl lever at the place, corresponding locking side that abuts in described driver part after operating contact intactly in described two running statuses, it is characterized in that, be provided with the second locking side at the slave unit place for each operating condition, described the second locking side is on the traffic direction of described slave unit, and be positioned at before the locking side of the described running status of described locking, so that prevent from turning back with regard to lockable described main switch contact is closed after by this additional locking side of described slave unit.
The advantage that realizes by the utility model is especially as follows: the load switch still can come into operation in the extremely low situation of temperature at any time, and when the motion flow process can not full implementation too.For this reason, do not need to change the characteristic harmonious with normal condition of accumulator drive unit.
The utility model utilizes at this, be closed if only have main switch contact (Haupt schal tkontakt) under operating condition separately, but the continuous current contact is not closed, even then also can drive the load switch in the extremely low situation of temperature.Because oil temperature on every side is very low, the heat that produces in the main switch contact can be discharged, so the impossible appearance in main switch contact is overheated.Because in this oil heating that slowly occurs, it is also certain that heat heats because oil is by becoming freely when further changing in transfer resistance, so the oil of load switch can at a good pace reach certain temperature, this temperature no longer hinders normal switching flow, thereby the load switch can easily turn round to its final position separately again always.Because can in normal gearshift procedure, cross easily pawl lever in the temperature range reliably in the additional locking side (Sperrflanke) on the slave unit of accumulator drive unit, so also can not hinder switching flow owing to additional locking side under normal operation.
Description of drawings
Be described in the drawings the accumulator drive unit as the new load switch of embodiment.Wherein:
Fig. 1 there is shown the accumulator drive unit overlooking; And
Fig. 2 has illustrated the accumulator drive unit according to Fig. 1 in section.
Embodiment
In the hood-like housing 10, tighten balladeur train 12 and step balladeur train 13 and be bearing in movably on the guiding thick stick 11 outside.Tighten balladeur train 12 and have side flanges 14,15 for this reason, step balladeur train 13 has side flanges 16,17.Compression spring 18 is arranged on and tightens between balladeur train 12 and the step balladeur train 13, and this compression spring is bearing in the slide bushing 19 around this guiding thick stick 11 movably.Tighten balladeur train 12 and step balladeur train 13 overlaps each other by its inboard like this at this, namely compression spring 18 can be strained between the side flanges 16 of the right side flanges 15 that tightens balladeur train 12 and step balladeur train 13.Tighten balladeur train 12 and have outside two bridgings 20, the eccentric wheel 21 of driving shaft 22 is between these two bridgings.Step balladeur train 13 force closures ground links to each other with switching crank 23.Switching crank 23 is used for driving contact activity, that be not shown specifically of load switch.At this, open successively the contact of an operating condition, and close successively the contact of another operating condition, wherein the shut-in time of the single contact of two operating conditions occurs overlapping in known manner.When the closing of contact, close successively in main switch contact, place, handoff procedure end and continuous current contact.The switching crank 23 that drives these contacts links to each other with cam disc 24, and bolt 25 is fixed on this cam disc by rotatable slide block 26, and this slide block is embedded in the recess 27 at downside place of step balladeur train 13.Cam disc 24 has respectively locking side 28 and 29 for each operating condition, and pawl lever 30 or 31 abuts in respectively locking side 28 and 29 places.In addition, each locking side 28 and 29 has been equipped with other locking side 281 or 291 in cam disc 24, and pawl lever 30 or 31 abuts in locking side 281 or 291 places when the motion flow process is imperfect, as following also will elaborate.
The working method of accumulator is as follows: by driving shaft 22, bring to its leftmost position by the eccentric wheel 21 that tightens slide block 12, wherein compression spring 18 is by side flanges 15 tensions on its right.Step slide block 13 is fixed in its position by cam disc 24 and by the pawl lever 30 that is close to 28 places, locking side, thereby the pressure of compression spring 18 can be stored on the side flanges 16 on its left side.Come in its leftmost position in case tighten slide block 12, and extrude at this plug-in unit 36 by pawl lever 30, then therefore cam disc 24 also discharges by the bolt 25 of step slide block 13.Now, it makes motion carry out towards a left side from right.Move at the same time and switch crank 23, thus the mode operating contact to mention.After this motion finished fully, pawl lever 31 descended towards another locking side 29, and therefore step slide block 13 is fixed on new position.Handoff procedure finishes, and the accumulator drive unit is that follow-up switching is prepared, and follow-up switching imports when the driving shaft 26 with eccentric wheel 21 continues rotation by the motion that tightens slide block 12.
Now importantly, cam disc 24 is equipped with extra locking side 281 and 291, and it is adjacent before locking side 28 or 29 originally respectively in the direction of motion.At this, if from the position execution dispose procedure shown in Fig. 1, then because the toughness of oil is very large and because the temperature of step slide block 13 is extremely low, switches crank 23 and can not be pressed onto its end position always, so pawl lever can not be towards affiliated locking side 29 descends.At this because pawl lever 31 291 descends towards the locking side, although and therefore switch crank 23 and do not reach end position and still lock step slide block 13, so can work in adjacent locking side 291 before locking side 29 on the direction of motion.
Additional locking side 281, the 291st arranges like this, namely closes respectively in the main switch contact, relevant position of switching crank 23.Slowly be transitioned on the whole circumference of cam disc 24 owing to belong to the groove of locking side 281 or 291, so guaranteed in normal handoff procedure, at first to drag pawl lever 31 or the 30 locking sides that can not be added on the cam disc circumference to stop.
Also guarantee on the other hand, the locking side 281 that can not be added at dispose procedure (namely when pawl lever 30 slips over from locking side 28) stops, because pawl lever 30 is enough far away by being shown by eccentric wheel 21 fixing plug-in units 36, and keep long enough in this position.
Be clear that very that also if step slide block 13 locks by locking side 29 or 291 in its left position, and tighten slide block 12 by eccentric wheel towards moving right, until pawl lever finally discharges start-up course, then described process also can be carried out similarly.
Claims (1)
1. switch of the load for the shunting switch of staged transformer, it has two operating conditions, wherein from a described operating condition, to the end of the handoff procedure of described another operating condition, closing successively main switch contact and follow current contact, wherein by the accumulator drive unit, realize described handoff procedure, the slave unit of the described contact of operation of described accumulator drive unit is lockable by means of the pawl lever at the place, corresponding locking side that abuts in described driver part after operating contact intactly in described two running statuses
It is characterized in that,
Be provided with the second locking side (281,291) at the slave unit place for each operating condition, described the second locking side is on the traffic direction of described slave unit, and the locking side (28 or 29) that is positioned at the described running status of described locking before, so that prevent from turning back with regard to lockable described main switch contact is closed after by this additional locking side of described slave unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220174575 CN202796517U (en) | 2012-04-23 | 2012-04-23 | Load switching device for tap switch of staged transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220174575 CN202796517U (en) | 2012-04-23 | 2012-04-23 | Load switching device for tap switch of staged transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796517U true CN202796517U (en) | 2013-03-13 |
Family
ID=47823727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220174575 Expired - Lifetime CN202796517U (en) | 2012-04-23 | 2012-04-23 | Load switching device for tap switch of staged transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202796517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110603619A (en) * | 2017-02-16 | 2019-12-20 | Abb保加利亚有限公司 | Spring energy accumulator for a power switch of an on-load tap changer |
-
2012
- 2012-04-23 CN CN 201220174575 patent/CN202796517U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110603619A (en) * | 2017-02-16 | 2019-12-20 | Abb保加利亚有限公司 | Spring energy accumulator for a power switch of an on-load tap changer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |