CN101916979A - Power Transformer Graded Insulation Neutral Point Integrated Sealing Gap Device - Google Patents
Power Transformer Graded Insulation Neutral Point Integrated Sealing Gap Device Download PDFInfo
- Publication number
- CN101916979A CN101916979A CN 201010240445 CN201010240445A CN101916979A CN 101916979 A CN101916979 A CN 101916979A CN 201010240445 CN201010240445 CN 201010240445 CN 201010240445 A CN201010240445 A CN 201010240445A CN 101916979 A CN101916979 A CN 101916979A
- Authority
- CN
- China
- Prior art keywords
- switch
- control circuit
- contactor
- contact
- sequence current
- 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.)
- Granted
Links
Images
Landscapes
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
本发明公开了一种电力变压器分级绝缘中性点一体化密封间隙装置，包括触头(1)、传动机构(2)、电动机(3)、零序电流互感器(4)及电动机控制电路(5)，其特征在于：设置装置控制电路(6)和操作面板(7)，所述装置控制电路(6)中的控制元件通过操作面板(7)向外提供；触头(1)、传动机构(2)、电动机(3)、电动机控制电路(5)、装置控制电路(6)和操作面板(7)依次相接，触头(1)直接穿过零序电流互感器(4)中心，零序电流互感器(4)通过电缆与操作面板(7)相接，电动机控制电路(5)与操作面板(7)相接。本发明兼具保护间隙和接地开关的功能，整体封装，结构简单，动作准确，操作自动化。
The invention discloses a power transformer graded insulation neutral point integrated sealing gap device, comprising a contact (1), a transmission mechanism (2), a motor (3), a zero-sequence current transformer (4) and a motor control circuit ( 5), characterized in that: a device control circuit (6) and an operation panel (7) are provided, and the control elements in the device control circuit (6) are provided externally through the operation panel (7); the contact (1), the transmission The mechanism (2), the motor (3), the motor control circuit (5), the device control circuit (6) and the operation panel (7) are sequentially connected, and the contact (1) directly passes through the center of the zero-sequence current transformer (4) , the zero-sequence current transformer (4) is connected to the operation panel (7) through a cable, and the motor control circuit (5) is connected to the operation panel (7). The invention has the functions of protecting the gap and the grounding switch, is packaged as a whole, has simple structure, accurate action and automatic operation.
Description
Technical field
The present invention relates to electric power system transformer neutral point overvoltage protection field, be specifically related to a kind of power transformer graded insulation neutral point integrated sealing clearance device, be applicable to overvoltage protection the transformation insulated neutral.
Background technology
Voltage in the supply network is very high, and neutral point generally adopts direct grounding way, because relay protection setting configuration and prevent the requirement of aspect such as communication interference in order to limit single-phase short circuit current, wherein has part transformer adopting isolated neutral mode.Under this operational mode; because thunderbolt, single-phase grounding fault etc. can cause neutral point overvoltage; and transformer is graded insulation mostly, so overvoltage causes very big threat to the insulation of neutral point, must protective device be set to it and prevent that accident from taking place.
Up to now, the correlative study achievement that obtains both at home and abroad mainly contains following two kinds.
1 rod gap
During No. 589 literary compositions of State Power Corporation " preventing 25 important requirements of electrical production major accident " the 17 chapter " prevents the ground network accident "; the 17.9th joint regulation: " be the unusual service condition that prevents isolated isolated neutral system to occur in effectively earthed system and produce higher power-frequency overvoltage, the neutral point overvoltage of the earth-free transformer of 110～220kV should adopt excellent gap protection mode ".Rod gap simple structure, easy to maintenance, generally be installed in the open air.But operating experience shows; when system moves the generation single phase ground fault in the effective grounding mode; that the distance in gap is adjusted is inaccurate, gap contact technology difference and factor such as be affected by the external environment cause the gap action easily; system's zero-sequence impedance parameter is changed, and the variation of zero-sequence current will cause the protective relaying maloperation work and cause unnecessary power failure.
2 goat's horn NEW TYPE OF COMPOSITE gaps
There are inherent shortcomings such as distance adjustment is inaccurate, discharge voltage instability in the Li Chengrong of the Peng Fei of Northeast Grid Co., Ltd., the Chen Weijiang of Wuhan High Voltage Research Institute Of State Grid, North China Electric Power University etc. for solution 110, the protection of 220kV transformer neutral point when installing with the split of rod-rod gap electrode; determine the technical conditions in gap and designed the structure in gap according to the gap protection principle, developed the novel protected gap of a kind of goat's horn.This novel gap is mechanical support with the composite insulator, and the goat's horn electrode is fixed on the insulator two ends, and its sparking electrode and arcing electrode separation have good concentricity, advantages such as distance adjustment is accurate, Installation and Debugging are convenient and ablation resistance is strong, discharge stability.But because this gap is exposed to the open air, easily caused gap shorting, cause protecting malfunction by the accidental touching of foreign objects such as insect, birds or rainwater.Simultaneously, the electrode that is fixed on the composite insulator two ends occupies bigger horizontal area, and can only work as the protection gap and use.
Summary of the invention
At the problems referred to above, the present invention proposes a kind of power transformer graded insulation neutral point integrated sealing clearance device.
Technical scheme provided by the invention is a kind of power transformer graded insulation neutral point integrated sealing clearance device, contact (1), transmission mechanism (2), motor (3), punching zero sequence current mutual inductor (4) and electromotor control circuit (5), setting device control circuit (6) and guidance panel (7), the control element in the described device control circuit (6) outwards provides by guidance panel (7);
Contact (1), transmission mechanism (2), motor (3), electromotor control circuit (5), device control circuit (6) and guidance panel (7) join successively, contact (1) directly passes punching zero sequence current mutual inductor (4) center, punching zero sequence current mutual inductor (4) joins by cable and guidance panel (7), and electromotor control circuit (5) joins with guidance panel (7).
And described punching zero sequence current mutual inductor (4) is provided with punching zero sequence current mutual inductor winding lead-out terminal (4.1) and auxiliary travel switch is often opened node (4.2);
When device used when the protection gap, punching zero sequence current mutual inductor winding lead-out terminal (4.1) was connected to guidance panel (7) by cable; Device is when earthed switch uses, and punching zero sequence current mutual inductor winding lead-out terminal (4.1) is often opened node (4.2) short circuit automatically, no signal output by auxiliary travel switch.
And, described device control circuit (6) is by air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11), rotary switch SA (12), combined floodgate branch road and separating brake branch road are formed, described combined floodgate branch road comprises control combined floodgate switch far away (13), switch knob HA (14), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17), travel switch CK1 (18), described separating brake branch road comprises travel switch CK2 (19), contactor JLC1 normally-closed contact (20), contactor JLC2 hot-wire coil (21), contactor JLC2 normally opened contact (24), control separating brake switch (22) far away and opening button TA (23) form;
Air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11) and rotary switch SA (12) join successively, rotary switch SA (12) joins with combined floodgate branch road and separating brake branch road respectively, control combined floodgate switch far away (13) in the combined floodgate branch road and switch knob HA (14) interlock contactor JLC1 normally opened contact (15), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17) and travel switch CK1 (18) join successively; Control separating brake switch far away (22) in the separating brake branch road and opening button TA (23) interlock contactor JLC2 normally opened contact (24), contactor JLC2 normally opened contact (24), contactor JLC2 hot-wire coil (21), contactor JLC1 normally-closed contact (20), travel switch CK2 (19) join successively.
And, described guidance panel (7) is provided with the device control circuit mains switch (26) that is connected with device control circuit (6), the temperature and humidity controller (27) that is connected with electromotor control circuit (5) and terminal board (25), and the control element that outwards provides by guidance panel (7) in the device control circuit (6) comprises air switch QF2 (8), rotary switch SA (12), switch knob HA (14), opening button TA (23), stop button KA (10).
And contact (1) adopts SN-1000A oil-minimum breaker contact, discharge probability 97.04%; Punching zero sequence current mutual inductor (4) adopts the punching zero sequence current mutual inductor of primary side withstand current 40kA/3s, no-load voltage ratio 100/5 and class of accuracy 10P10.
The present invention has following advantage and effect:
1) device has gap and earthed switch function concurrently: can work as the protection gap when contact disconnects and use, action is accurate, and discharge dispersity is little; Can work as earthed switch during contact closure and use, can tolerate the power current of 40kA/3s.
2) the step transformer insulation neutral point integrated sealing clearance of employing patented technology, overall package, humiture is controlled, and clearance distance is accurate, guarantees the stability of discharge.
3) contact of the present invention is selected the oil-minimum breaker contact for use, and ablation resistance is good, improves the gap accuracy of action; Contact resistance is little, guarantees the reliability of ground connection when using as earthed switch.
4) adopt automatic technology, seal clearance can be realized on the spot or distant place electric operating, and is simple to operate.The end of operation motor cuts off the power supply automatically, effectively prevents misoperation.
5) Zhuan Zhi current measurement and control section utilize auxiliary travel switch to realize punching zero sequence current mutual inductor secondary side short circuit automatically, have ensured the reliability of the action of transformer zero-sequenceprotection.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is the device control circuit schematic diagram of the embodiment of the invention;
Fig. 3 is the punching zero sequence current mutual inductor schematic diagram of the embodiment of the invention;
Fig. 4 is the guidance panel schematic diagram of the embodiment of the invention;
Fig. 5 is the encapsulating structure schematic diagram of the embodiment of the invention.
Embodiment
According to the usage of trade, power transformer graded insulation neutral point integrated sealing clearance device provided by the present invention also can be called power transformer graded insulation neutral point integrated sealing clearance.Describe technical solution of the present invention in detail below in conjunction with drawings and Examples.
Fig. 1 has provided power transformer graded insulation neutral point integrated sealing clearance device structured flowchart, and its annexation and effect are as follows.
Contact (1), transmission mechanism (2), motor (3), electromotor control circuit (5), device control circuit (6) and guidance panel (7) join successively, be that contact (1) joins with transmission mechanism (2), motor (3) joins with transmission mechanism (2) and electromotor control circuit (5) respectively, and device control circuit (6) joins with electromotor control circuit (5) and guidance panel (7) respectively.Contact (1) directly passes punching zero sequence current mutual inductor (4) center, and punching zero sequence current mutual inductor (4) joins by cable and guidance panel (7), and electromotor control circuit (5) joins with guidance panel (7).Wherein transmission mechanism (2) adopts the conventional screw mandrel kind of drive, and electromotor control circuit (5) adopts the motor conventional control circuit, and contact (1), motor (3), punching zero sequence current mutual inductor (4) all can adopt the outsourcing conventional products.All there is individual circular hole at the center of punching zero sequence current mutual inductor, is used for primary side and passes the survey current signal, and contact during enforcement (1) directly passes this circular hole and gets final product.The custom circuit that prior art electromotor control circuit (5) is adopted wherein all is provided with sky and opens QF1 and motor M, and the work of motor M is subjected to thermal relay RJ, contactor JLC1, JLC2 control; Circuit also provides the Temperature and Humidity Control function, is realized by condensation controller WSK and heater DJR; QF1 is an air switch, and the working power of motor and temperature and humidity controller is provided; RJ is a thermal relay, can disconnect the power supply of motor when the motor fault adstante febre; Contactor JLC1, JLC2 can frequently close the switch that closes, carries and cut-off the overload current of normal current and regulation, are respectively applied for control closing circuit and sub-gate circuit.The motor of embodiment (3) and corresponding electromotor control circuit (5) adopt the product of Shenyang Dongmu Electrical Equipment Co. Ltd, and setting gets final product electromotor control circuit (5) according to the product operation instruction.The present invention has designed accurate device control circuit (6) structure, and electromotor control circuit (5) operation response personnel are by the operation of guidance panel (7) to control element in the device control circuit (6).Guidance panel (7) adapting device control circuit (6) is provided with, and suggestion operations panel (7) adopts the described guidance panel of utility model patent (application number 201020170035.7).
As shown in Figure 2, the device control circuit of embodiment (6) is by air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11), rotary switch SA (12), combined floodgate branch road and separating brake branch road are formed, described combined floodgate branch road comprises control combined floodgate switch far away (13), switch knob HA (14), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17), travel switch CK1 (18), described separating brake branch road comprises travel switch CK2 (19), contactor JLC1 normally-closed contact (20), contactor JLC2 hot-wire coil (21), contactor JLC2 normally opened contact (24), control separating brake switch (22) far away and opening button TA (23) form.Air switch QF2 (8) promptly is the power supply of device control circuit (6) control loop that provides.
Air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11) and rotary switch SA (12) join successively, rotary switch SA (12) joins with combined floodgate branch road and separating brake branch road respectively, control combined floodgate switch far away (13) in the combined floodgate branch road and switch knob HA (14) interlock contactor JLC1 normally opened contact (15), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17) and travel switch CK1 (18) join successively; Control separating brake switch far away (22) in the separating brake branch road and opening button TA (23) interlock contactor JLC2 normally opened contact (24), contactor JLC2 normally opened contact (24), contactor JLC2 hot-wire coil (21), contactor JLC1 normally-closed contact (20), travel switch CK2 (19) join successively.So-called interlock is exactly that contactor JLC1 normally opened contact (15) also can move after far controlling combined floodgate switch (13) or switch knob HA (14) action; After control separating brake switch (22) far away or opening button TA (23) action, contactor JLC2 normally opened contact (24) equally also can move.
Its operation principle is: air switch QF2 (8) closes, energized, select on the spot or remote operation by rotary switch SA (12), switch knob HA (14) or opening button TA (23) be can press on the spot and contactor JLC1 normally opened contact (15) or contactor JLC2 normally opened contact (24) closure made, also can far control combined floodgate switch (13) or far control separating brake switch (22) closure by remote operation, make device control circuit (6) switch on, motor (3) rotating, drive transmission mechanism (2) work, transmission mechanism (2) control contact (1) moves up or down; After contact (1) arrives assigned address, travel switch CK1 (18) or CK2 (19) disconnecting apparatus control circuit (6) power supply, contactor JLC1 hot-wire coil (16) or contactor JLC2 hot-wire coil (21) so dead electricity, make electromotor control circuit (5) cut off the power supply automatically, motor (3) quits work.Also can motor (3) promptly be quit work.
As shown in Figure 3, when the integrated inter space device of power transformer graded insulation neutral point provided by the invention used when the protection gap, punching zero sequence current mutual inductor winding lead-out terminal (4.1) was connected to guidance panel (7) by cable; Device is when earthed switch uses, and punching zero sequence current mutual inductor winding lead-out terminal (4.1) is often opened node (4.2) short circuit automatically, no signal output by auxiliary travel switch.
A large amount of power frequencies and lightning voltage impulsive discharge result of the test show: under power frequency and lightning impulse overvoltage, and energy action message when contact (1) disconnection is used as the gap, protection step transformer insulation neutral point insulation.
For the 110kV transformer neutral point:
Contact (1) adopts SN-1000A oil-minimum breaker contact, discharge probability 97.04%; Measure portion adopts the punching zero sequence current mutual inductor of primary side withstand current 40kA/3s, no-load voltage ratio 100/5, class of accuracy 10P10; Overall package adopts the encapsulating structure (utility application number 201020170035.7) of 110kV level power transformer graded insulation neutral point protection device, forms incorporate seal clearance, and clearance distance is 75～90mm.For the purpose of convenient enforcement, the encapsulating structure of embodiment is provided, referring to Fig. 5, wherein the left side is a front view, and the right is the rearview on the left side: device comprises top patchboard (28), silicon rubber composite insulation outer coat (29), ground connection bronze medal (30), column (31), control box (35), base (32), position indication window (33), handle (34) and column door (36).Its position with annexation is: top patchboard (28), silicon rubber composite insulation outer coat (29), column (31) and base (32) are connected up and down successively; On column (31), be disposed with ground connection bronze medal (30), position indication window (33), control box (35) and column door (36) from top to bottom; On control box (35) and column door (36), be respectively arranged with handle (34).Each functional part is described as follows:
1, top patchboard (28)
Top patchboard (28) is a kind of circular metal plate, and it is provided with binding post;
Its function has been electric interconnect function.
2, silicon rubber composite insulation outer coat (29)
Silicon rubber composite insulation outer coat (29) is a kind of cylinder sleeve of being made by the silicon rubber composite insulating material that has full skirt.
Its function is to electrify air bound from effect.
3, ground connection bronze medal (30)
Ground connection bronze medal (30) is a kind of copper billet;
Its function has been electric ground connection effect.
4, column (31)
Column (31) is the square open tubular column of a kind of metal, its length * wide * height=0.3m * 0.3m * 2.5m.
Its function has been the effect of the relevant functional part of encapsulation, as transmission mechanism (2), motor (3), punching zero sequence current mutual inductor (4), electromotor control circuit and (5) device control circuit (6).
5, control box (35)
Control box (35) is a kind of metal square box, and it is provided with guidance panel (7);
Its function has been the effect of the relevant functional part of operation.
Referring to Fig. 4: specifically, guidance panel is provided with device control circuit mains switch (26), air switch QF2 (8), temperature and humidity controller (27), rotary switch SA (12), switch knob HA (14), opening button TA (23), stop button KA (10) and terminal board (25).The device control circuit mains switch (26) that operating personnel's operation is connected with device control circuit (6) can be to device control circuit (6) outage or power supply; Operating personnel are by going up the temperature and humidity controller (27) that operation is connected with electromotor control circuit (5) at guidance panel (7), control condensation controller WSK and heater DJR.The control element that outwards provides by guidance panel (7) in the device control circuit (6) comprises air switch QF2 (8), rotary switch SA (12), switch knob HA (14), opening button TA (23), stop button KA (10), operating personnel can operate, respectively influence.By terminal board (25), can provide being electrically connected of each element easily, insert power supply and draw signal, punching zero sequence current mutual inductor (4) is exactly to join by cable and terminal board (25), so that be connected to the control room, is used for acquired signal.Specifically, be device when use in the protection gap, punching zero sequence current mutual inductor winding lead-out terminal (4.1) is connected to terminal board (25) by cable.
6, base (32)
Base (32) is a kind of metallic plate;
Its function has been the effect of installing and fixing.
7, position indication window (33)
Position indication window (33) is a kind of transparent organic glass window;
Its function is an opening and closing state of being convenient to observing protector.
8, handle (34)
Handle (34) is a kind of metal handle with lock commonly used
Its function is to pin control box (35) and column door (36), prevents the misoperation of unrelated person.
9, column door (36)
Column door (36) is a kind of metallic door commonly used;
Its function has been a safety effect.
In order to reduce the floor space of device, make device appearance attractive in appearance, reach easy to operate purpose simultaneously, embodiment is encapsulated in electric operation and control section in the column (31), and column (31) is installed in the below of silicon rubber composite insulation outer coat (29), the floor space of device only is 0.09m
2The chamber door of control box (35) and column door (36) have located to install additional handle with lock (34), have improved fail safe, prevent the misoperation of unrelated person.
Embodiment is connected to top patchboard (28) with the transformer neutral point lead-out wire when operate as normal, with ground connection bronze medal (30) ground connection; Device control circuit mains switch (26) and air switch QF2 (8) on control box (35) panel all are in "on" position, and temperature and humidity controller this moment (27) is in running order, can detect the also humiture of adjusting device inner air automatically.
During remote operation rotary switch SA (12) is threaded to " distant place ", sends actuating signal in the distance, device can carry out corresponding divide-shut brake or shut-down operation.
During local operation rotary switch SA (12) is threaded to " on the spot "; on guidance panel, press switch knob HA (14); the protection gap of device can be closed under the control of device control circuit (6); can see that from position indication window (33) pointer position points to closing position from the separating brake position; after arriving assigned address; electromotor control circuit (5) and device control circuit (6) be outage automatically, EO.If press stop button KA (10) in making process, feed motion can stop at once.
During local operation rotary switch SA (12) is threaded to " on the spot "; on guidance panel, press opening button TA (23); the protection gap of device can be closed under the control of device control circuit (6); can see that from position indication window (33) pointer position points to the separating brake position from closing position; after arriving assigned address; electromotor control circuit (5) and device control circuit (6) be outage automatically, EO.If press stop button KA (10) in the separating brake process, the separating brake action can stop at once.
Claims (5)
1. power transformer graded insulation neutral point integrated sealing clearance device, comprise contact (1), transmission mechanism (2), motor (3), punching zero sequence current mutual inductor (4) and electromotor control circuit (5), it is characterized in that: setting device control circuit (6) and guidance panel (7), the control element in the described device control circuit (6) outwards provides by guidance panel (7);
Contact (1), transmission mechanism (2), motor (3), electromotor control circuit (5), device control circuit (6) and guidance panel (7) join successively, contact (1) directly passes punching zero sequence current mutual inductor (4) center, punching zero sequence current mutual inductor (4) joins by cable and guidance panel (7), and electromotor control circuit (5) joins with guidance panel (7).
2. power transformer graded insulation neutral point integrated sealing clearance device according to claim 1 is characterized in that: described punching zero sequence current mutual inductor (4) is provided with punching zero sequence current mutual inductor winding lead-out terminal (4.1) and auxiliary travel switch is often opened node (4.2);
When device used when the protection gap, punching zero sequence current mutual inductor winding lead-out terminal (4.1) was connected to guidance panel (7) by cable; Device is when earthed switch uses, and punching zero sequence current mutual inductor winding lead-out terminal (4.1) is often opened node (4.2) short circuit automatically, no signal output by auxiliary travel switch.
3. power transformer graded insulation neutral point integrated sealing clearance device according to claim 1 and 2, it is characterized in that: described device control circuit (6) is by air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11), rotary switch SA (12), combined floodgate branch road and separating brake branch road are formed, described combined floodgate branch road comprises control combined floodgate switch far away (13), switch knob HA (14), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17), travel switch CK1 (18), described separating brake branch road comprises travel switch CK2 (19), contactor JLC1 normally-closed contact (20), contactor JLC2 hot-wire coil (21), contactor JLC2 normally opened contact (24), control separating brake switch (22) far away and opening button TA (23) form;
Air switch QF2 (8), interlocking (9), stop button KA (10), thermal relay RJ (11) and rotary switch SA (12) join successively, rotary switch SA (12) joins with combined floodgate branch road and separating brake branch road respectively, control combined floodgate switch far away (13) in the combined floodgate branch road and switch knob HA (14) interlock contactor JLC1 normally opened contact (15), contactor JLC1 normally opened contact (15), contactor JLC1 hot-wire coil (16), contactor JLC2 normally-closed contact (17) and travel switch CK1 (18) join successively; Control separating brake switch far away (22) in the separating brake branch road and opening button TA (23) interlock contactor JLC2 normally opened contact (24), contactor JLC2 normally opened contact (24), contactor JLC2 hot-wire coil (21), contactor JLC1 normally-closed contact (20), travel switch CK2 (19) join successively.
4. power transformer graded insulation neutral point integrated sealing clearance device according to claim 3, it is characterized in that: described guidance panel (7) is provided with the device control circuit mains switch (26) that is connected with device control circuit (6), the temperature and humidity controller (27) that is connected with electromotor control circuit (5), and terminal board (25), the control element that outwards provides by guidance panel (7) in the device control circuit (6) comprises air switch QF2 (8), rotary switch SA (12), switch knob HA (14), opening button TA (23), stop button KA (10).
5. the integrated seal protecting device of power transformer graded insulation neutral point according to claim 1 and 2 is characterized in that:
Contact (1) adopts SN-1000A oil-minimum breaker contact, discharge probability 97.04%; Punching zero sequence current mutual inductor (4) adopts the punching zero sequence current mutual inductor of primary side withstand current 40kA/3s, no-load voltage ratio 100/5 and class of accuracy 10P10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102404459A CN101916979B (en) | 2010-07-27 | 2010-07-27 | Graded insulating neutral point integrated sealing clearance device of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102404459A CN101916979B (en) | 2010-07-27 | 2010-07-27 | Graded insulating neutral point integrated sealing clearance device of power transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101916979A true CN101916979A (en) | 2010-12-15 |
| CN101916979B CN101916979B (en) | 2013-04-10 |
Family
ID=43324408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102404459A Active CN101916979B (en) | 2010-07-27 | 2010-07-27 | Graded insulating neutral point integrated sealing clearance device of power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101916979B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226705A (en) * | 2011-04-01 | 2011-10-26 | 四川省绵阳西南自动化研究所 | A moving measurement device based on linear modules |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790356A (en) * | 1994-10-13 | 1998-08-04 | Bottrell; Gerald W. | Transformer protection system for protecting source transformers from ill effects of zero-sequence currents |
| CN201383671Y (en) * | 2009-04-03 | 2010-01-13 | 山东泰开隔离开关有限公司 | Neutral point grounding protective device of transformer |
| CN201426015Y (en) * | 2009-06-15 | 2010-03-17 | 上海安越电气工程技术有限公司 | Transformer neutral point composite apparatus device |
-
2010
- 2010-07-27 CN CN2010102404459A patent/CN101916979B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5790356A (en) * | 1994-10-13 | 1998-08-04 | Bottrell; Gerald W. | Transformer protection system for protecting source transformers from ill effects of zero-sequence currents |
| CN201383671Y (en) * | 2009-04-03 | 2010-01-13 | 山东泰开隔离开关有限公司 | Neutral point grounding protective device of transformer |
| CN201426015Y (en) * | 2009-06-15 | 2010-03-17 | 上海安越电气工程技术有限公司 | Transformer neutral point composite apparatus device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226705A (en) * | 2011-04-01 | 2011-10-26 | 四川省绵阳西南自动化研究所 | A moving measurement device based on linear modules |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101916979B (en) | 2013-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203071571U (en) | Intelligent monitoring device for distributed boundary switches | |
| CN201590374U (en) | Outdoor high-voltage intelligent demarcation vacuum circuit breaker | |
| CN103325627A (en) | Fast and intelligent 10KV pole-mounted breaker | |
| CN106921165A (en) | A kind of intelligent power distribution station area | |
| CN216671484U (en) | 12kV degree of depth once or twice fuses circuit breaker | |
| CN104037011A (en) | Watchdog division load switch | |
| CN104348107A (en) | All condition intelligent armored moving-type alternating current metal closed switch equipment | |
| CN201207564Y (en) | Protection device for transformer earthing | |
| CN203588916U (en) | Outdoor high-voltage intelligent vacuum circuit breaker | |
| CN105977090A (en) | Outdoor integrated embedded pole | |
| CN104967036B (en) | Integrated intelligent combination transformer station | |
| CN201562961U (en) | AC generator neutral point integrated cabinet | |
| CN115425567A (en) | High-safety SF6 full-insulation compact ring main unit | |
| CN202796772U (en) | 10kV rapid intelligent column breaker | |
| CN211958262U (en) | Double-incoming-line integrated skid-mounted power distribution device | |
| CN205565728U (en) | Intelligent power distribution platform district | |
| CN101916979A (en) | Power Transformer Graded Insulation Neutral Point Integrated Sealing Gap Device | |
| CN110048335A (en) | A kind of switchgear | |
| CN204332813U (en) | A vacuum load switch | |
| US9077161B2 (en) | Integral current transforming electric circuit interrupter | |
| CN201638657U (en) | Packaging Structure of Classified Insulation Neutral Protection Device for 110kV Power Transformer | |
| CN201690118U (en) | Open outdoor high-voltage monitoring and protecting combined electric appliance | |
| CN111193216B (en) | Arc extinction switch cabinet | |
| CN201877706U (en) | Transformer neutral point combined electrical apparatus device | |
| CN104538243A (en) | A vacuum load switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |