CN201130851Y - Automatic safety device for low-voltage drawer switch cabinet - Google Patents
Automatic safety device for low-voltage drawer switch cabinet Download PDFInfo
- Publication number
- CN201130851Y CN201130851Y CNU2007201870515U CN200720187051U CN201130851Y CN 201130851 Y CN201130851 Y CN 201130851Y CN U2007201870515 U CNU2007201870515 U CN U2007201870515U CN 200720187051 U CN200720187051 U CN 200720187051U CN 201130851 Y CN201130851 Y CN 201130851Y
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- CN
- China
- Prior art keywords
- switch
- drawer
- contact
- drawer switch
- tds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a switch control protecting unit for a transformer station, which adopts the technical proposal that: three NC contact type temperature control switches are positioned at the fixed contact of the input terminal of a drawer switch, three NC contact type temperature control switches are arranged at the fixed contact of the output terminal, two control lines are introduced into the body of the drawer cabinet through the auxiliary contact of the drawer switch after six switches have been connected in series, three temperature control switches are positioned at the main input dynamic plug of the drawer switch, three temperature control switches are positioned at the output dynamic plug of the drawer switch, and all the temperature control switches are connected in series and then connected with a magnet-aided relay coil in series. Then, a 220V power supply is introduced from the input terminal of the main loop, and an under-voltage release switch signal is introduced out from an under-voltage release circuit breaker and connected to the NO contact of the magnet-aided relay in series. The protecting unit can control the opening and closing of the under-voltage release circuit breaker in accordance with temperature variation so as to protect the main loop.
Description
Technical field
The utility model relates to the switch control protective device of transformer station (institute), specifically is a kind of automatic safety device of low voltage drawer switch cubicle.
Background technology
Mostly be unattended operation in the low pressure electric substation now, because the low importance of having been ignored electric substation gradually by people of the incidence of accident when transformer all has a power failure owing to certain switch fault causes occurring low-pressure side, is just really recognized its importance.
All have maintenance an every year in each minute transformer station, we when maintenance just to transformer station in drawer switch and the screw on the line copper bar etc. confine, but can't carry out its quality of correct monitoring to the dynamic and static plug of drawer switch, so just allow the maintenance maintenance personnel of transformer station that certain passivity has been arranged; Owing to mostly be to adopt breaker of plastic casing or motor switch in the low voltage drawer switch gear room; these switches only play load, overcurrent protection etc. to major loop; contact with plug in the turnover line terminals and power supply can't be withdrawed from from fault when bad; increased the occurrence probability of accident, this situation just may cause whole all line loop that goes out of transformer all to have a power failure because contact is bad.After this type of accident occurring, occur in the drawer switch and the drawer switch in time can also be extracted out as fault, allow transformer give other loop normal power supply, but only could normally use after fixing in this loop, if fault is to occur on the dynamic and static plug that the drawer switch is connected with cabinet, that keeps in repair whole power failure of line loop that of whole transformer with regard to needing, need stop the problem after a very long time arrangement accident, as keep in repair bad or the fault point is not got rid of, other of transformer goes out line loop just can't normal power supply
The utility model content
The purpose of this utility model is exactly the defective that exists at prior art, and a kind of automatic safety device of simple and practical low voltage drawer switch cubicle is provided.
Its technical scheme is: K1 is installed at drawer switch input terminal fixed contact place, K2, the temperature detect switch (TDS) of three normally-closed contact formulas of K3, K4 is installed at drawer switch outlet terminal fixed contact place, K5, the temperature detect switch (TDS) of three normally-closed contact formulas of K6, two control lines after six switches are cascaded are introduced drawout cubicle cabinet inside by the auxiliary contact of drawer switch, K7 is installed at moving plug place at drawer switch master inlet wire, K8, three temperature detect switch (TDS)s of K9, K10 is installed at drawer switch outlet moving contact place, K11, three temperature detect switch (TDS)s of K12, with K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, the all control circuit serial connection backs of K12 help formula relay K A coil to connect with magnetic, introduce the power supply of 220V from major loop inlet wire side, from under-voltage release circuit breaker KQ, draw the switching signal of under-voltage release, it is serially connected with the normally opened contact that magnetic helps formula relay K A.
Effect of the present utility model is: with the breaker of plastic casing in the drawer switch instead with the breaker of plastic casing of under-voltage release; and moving; on quiet plug and the interface temperature detect switch (TDS) is installed; so just can control cut-offfing of under-voltage release circuit breaker according to variation of temperature; thereby play the effect of protection major loop; if switch is selected is motor switch with under-voltage release; can directly the temperature detect switch (TDS) signal be connected to under-voltage trip coil; because temperature detect switch (TDS) all is installed on each contact or contact; the wiring that it is all are connected; then the temperature detect switch (TDS) circuit is serially connected with magnetic and helps the formula relay; to help the formula relay normally open contact to be connected in series with magnetic from the power supply signal that mains side is introduced under-voltage releasing device afterwards, this method have played very important protective effect to the line loop that goes out of drawer type powerful device.On low power drawer type switch and important equipment loop, can unnecessaryly be replaced with switch with under-voltage releasing device, in order to avoid after power cut of whole factory, incur loss through delay the time of sending electricity, but its temperature signal of drawing from the contact can be installed the remote alarms signal, be introduced in the people many place or night shift room.
Description of drawings
Accompanying drawing is a kind of circuit connection diagram of the present utility model.
Embodiment:
Shown in figure below: K1, K2, the temperature detect switch (TDS) of three normally-closed contact formulas of K3 is installed on drawer switch input terminal fixed contact place, K4, K5, the temperature detect switch (TDS) of three normally-closed contact formulas of K6 is installed on drawer switch outlet terminal fixed contact place, three back together and K1 of switch series, K2, the temperature detect switch (TDS) control line series connection of three normally-closed contact formulas of K3, two control lines after will connecting are afterwards introduced drawout cubicle cabinet inside by the auxiliary contact of drawer switch, K7, K8, three temperature detect switch (TDS)s of K9 are fixed in the moving plug place of drawer switch master inlet wire, so that moving, quiet plug contacts when bad, can in time major loop be disconnected and cutting off the electricity supply, guarantee the operation of electrical network, K10, K11, three temperature detect switch (TDS)s of K12 are installed on drawer switch outlet moving contact place, with K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, the all control circuit serial connection backs of K12 help the formula relay coil to connect with magnetic, introduce the power supply of 220V from major loop inlet wire side, from under-voltage release circuit breaker KQ, draw the switching signal of under-voltage release, it is serially connected with the normally opened contact that magnetic helps formula relay K A, because the under-voltage trip coil power supply is introduced from switch inlet wire side, so work as K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, after any one temperature detect switch (TDS) of K12 breaks down, all will cause magnetic to help the formula relay to disconnect under-voltage release power coil, make under-voltage trip coil because under-voltage automatic outage makes main switch out of service from fault.
It is to stop because the temperature detect switch (TDS) contact capacity causes the phenomenon of switch misoperation to take place inadequately that serial connection magnetic helps the purpose of formula relay.Above temperature detect switch (TDS) select for use temperature detect switch (TDS), the operating temperature of insulating properties to select 70 ℃ for use, magnetic helps formula relay K A to select the 220V anise for use, can make the switch of drawout cubicle formula out of service automatically from circuit when the appearance contact is bad by this improvement, the maintenance personal can in time get rid of fault the generation that provides against hidden trouble.Powerful power consumption equipment long-time running is difficult to guarantee under the situation of real fail safe (particularly at dynamic and static plug place), in order better to realize protecting the method for major loop quite important with temperature control in electric substation!
Claims (1)
1; a kind of automatic safety device of low voltage drawer switch cubicle; it is characterized in that: (K1 is installed at drawer switch input terminal fixed contact place; K2; K3) temperature detect switch (TDS) of three normally-closed contact formulas; (K4 is installed at drawer switch outlet terminal fixed contact place; K5; K6) temperature detect switch (TDS) of three normally-closed contact formulas; two control lines after six switches are cascaded are introduced drawout cubicle cabinet inside by the auxiliary contact of drawer switch; (K7 is installed at moving plug place at drawer switch master inlet wire; K8; K9) three temperature detect switch (TDS)s; (K10 is installed at drawer switch outlet moving contact place; K11; K12) three temperature detect switch (TDS)s; with (K1; K2; K3; K4; K5; K6; K7; K8; K9; K10; K11; K12) all control circuit serial connection backs help formula relay (KA) coil to connect with magnetic; introduce the power supply of 220V from major loop inlet wire side; from under-voltage release circuit breaker (KQ), draw the switching signal of under-voltage release, it is serially connected with the normally opened contact that magnetic helps formula relay (KA).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201870515U CN201130851Y (en) | 2007-05-19 | 2007-12-28 | Automatic safety device for low-voltage drawer switch cabinet |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200720022403.1 | 2007-05-19 | ||
| CN200720022403 | 2007-05-19 | ||
| CNU2007201870515U CN201130851Y (en) | 2007-05-19 | 2007-12-28 | Automatic safety device for low-voltage drawer switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201130851Y true CN201130851Y (en) | 2008-10-08 |
Family
ID=40018717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201870515U Expired - Fee Related CN201130851Y (en) | 2007-05-19 | 2007-12-28 | Automatic safety device for low-voltage drawer switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201130851Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN103779842A (en) * | 2014-01-22 | 2014-05-07 | 四川达卡电气有限公司 | Low-voltage switch equipment drawer unit contact temperature monitoring device |
-
2007
- 2007-12-28 CN CNU2007201870515U patent/CN201130851Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN103779842A (en) * | 2014-01-22 | 2014-05-07 | 四川达卡电气有限公司 | Low-voltage switch equipment drawer unit contact temperature monitoring device |
| CN103779842B (en) * | 2014-01-22 | 2017-01-18 | 四川达卡电气有限公司 | low-voltage switch equipment drawer unit contact temperature monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20101228 |