WO2001091151A1 - Combination of a vacuum interruption device and oil-filled transformer - Google Patents
Combination of a vacuum interruption device and oil-filled transformer Download PDFInfo
- Publication number
- WO2001091151A1 WO2001091151A1 PCT/US2001/040771 US0140771W WO0191151A1 WO 2001091151 A1 WO2001091151 A1 WO 2001091151A1 US 0140771 W US0140771 W US 0140771W WO 0191151 A1 WO0191151 A1 WO 0191151A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrical
- transformer
- interrupting
- magnetic actuator
- coupled
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
Definitions
- the present invention relates to a system and method for interrupting current to an electrical transformer device or to an electrical distribution system which is fed through the electrical transformer device. More specifically, the present invention relates to the combination of an electrical transformer device and a magnetically-actuated vacuum interruption device that controls power to, or through, the transformer device.
- electrical power interruption devices provide overload protection to various types of loads.
- an electrical arc often forms between the separating contacts of the interruption device.
- the electrical arc can cause damage to surrounding components.
- the electrical arc caused by its proximate interruption device can damage the transformer's windings, causing the transformer to malfunction or fail completely.
- loadbreak switching and common fuses use an insulating fluid to extinguish the electrical arc during current interruption.
- the transformer's core and windings, and the interruption device e.g., switch, circuit breaker or fuse
- the interruption device e.g., switch, circuit breaker or fuse
- the current interruption device disconnects current to the transformer's windings due to an overload or fault condition, for example, the resultant electrical arc is quenched by the surrounding insulating fluid.
- the current interruption device located within the electrical distribution transformer, is not being used to protect the transformer's windings, but instead is used to protect the downstream portion of the distribution system as it passes through the transformer housing (i.e., "loop-thru" connection).
- the insulating fluids have included mineral oil, silicone and sulfur hexaflouride (gas).
- the present invention describes a device and method for interrupting electrical power to an electrical transformer winding or to an electrical distribution system downstream from the device.
- the device comprises at least one electrical transformer winding and at least one interrupting device coupled to the electrical transformer winding.
- the interrupting device includes a vacuum enclosure. Contacts located in the vacuum enclosure are connected in series with the electrical transformer winding and are movable between an open and a closed position.
- the magnetic actuator is activated by an input signal, which may be an electrical current or an electrical voltage.
- Figure 1 is aperspective view ofan electrical power distribution transformer device, according to the present invention.
- Figure 2 is a zoomed-in view of the perspective view of Figure 1;
- Figure 3 is a cross-sectional view of a vacuum interruption device, according to the present invention.
- Figure 4A is a cross-section view of the vacuum interruption device in a closed position
- Figure 4B is a cross-section view of the vacuum interruption device in aa open position.
- FIG 1 is a perspective view of a three-phase pad-mounted electrical distribution transformer 100, according to the present invention.
- Electrical distribution transformer 100 may be any suitable transformer, such as a transformer for reducing a relatively high voltage (e.g., 7200 volts) to a relatively low voltage (e.g., 220 volts or 120 volts).
- Electrical distribution transformer 100 includes a tank 101.
- Tank 101 may have any suitable construction, such as welded joints and gasketed component seals. Electrical distribution transformer 100 is shown in Figure 1 with the top portion removed for clarity, however, it should be appreciated that electrical distribution transformer 100 is enclosed on all sides.
- Fluid bath 102 may include any conventional mineral oil, silicone oil, sulfur hexaflouride, or similar substance used to insulate and cool transformer windings 103-105 immersed in tank 101.
- Vacuum interruption devices 106-108 are mounted to the interior of tank 101, and submerged in fluid bath 102. Each of vacuum interruption devices 106-108 switch one phase of three- phase electrical distribution transformer 100.
- Electrical busbars 109-111 extend from vacuum interruption devices 106-108, respectively, to a front-side 112 of electrical distribution transformer 100. Electrical busbars 109-111 may be solid metal bars or cable/wire devices. Each of electrical busbars 109-111 attach to high voltage bushings
- High voltage input power enters electrical distribution transformer 100 via high voltage bushings 113-115. Electrical busbars 109-111 then carry the high voltage input power from high voltage bushings 113-115 to vacuum interruption devices 106-108, respectively. If vacuum interruption devices 106-108 are closed (as discussed further with reference to Figure 4A), the high voltage input power is provided to windings 103-105 of electrical distribution transformer 100. If, on the other hand, vacuum interruption devices 106-108 are open (as discussed with reference to Figure 4B) high voltage input power is prevented from entering windings 103-105 of electrical distribution transformer 100.
- electrical distribution transformer 100 and vacuum interruption devices 106- 108 may be used as a "loop-thru" circuit interrupter.
- electrical distribution transformer 100 and vacuum interruption devices 106-108 provide protection for electrical current that enters and exists transformer 100 without passing through windings 103-105.
- electrical distribution transformer 100 uses high voltage input bushings 113-115 and a correspondingly similar set of high voltage output bushings (not shown). All of the high voltage bushings are mounted to front side 112 of electrical distribution transformer 100. Electrical power enters high voltage input bushings 113-115 and passes through vacuum interruption devices 106-108 to the set of high voltage output bushings (not shown).
- connection between vacuum interruption devices 106- 108 to the set of high voltage output bushings may exist along with the connection between vacuum interruption devices 106-108 and windings 103-105.
- This set of high voltage output bushings may then be coupled to the remainder of the power distribution system, located downstream from electrical distribution transformer 100. In this way, vacuum interrupting device 106 protects and switches the downstream portion of the distribution system fed through the electrical distribution transformer 100, and not just windings 103-105.
- FIG. 2 is a zoomed-in depiction of the perspective view of Figure 1.
- Figure 2 provides greater detail of vacuum interruption device 106 in electrical distribution transformer 100.
- vacuum interruption device 106 is connected to an interior rear side 203 of tank 101 by a top end plate 201 and a bottom end plate 202.
- Top end plate 201 and bottom end plate 202 are insulated from vacuum interruption device
- Busbar 109 extends from vacuum interruption device 106 to front side 112 of electrical distribution transformer 100.
- Busbar 204 extends from vacuum interruption device 106 to transformer winding 103.
- FIG 3 is a cross-sectional view of vacuum interruption device 106, according to the present invention, and shows the operation of vacuum interruption device 106 in greater detail.
- vacuum interruption device 106 includes a spring 301 connected to a magnetic actuator 306.
- Magnetic actuator 306 is connected to a control device 302, that activates magnetic actuator 306 remotely.
- a current or voltage transformer 312 is coupled to an input current 313, and between control device 302 and busbar 109. If a current transformer is selected it may be a ring-style current transformer, well known to those in the art, and mounted on front-side 112 of electrical distribution transformer 100 around high voltage input bushing 113 (as shown in Figure 1).
- a voltage transformer it may be mounted inside tank 101 (as shown in Figure 1).
- Magnetic actuator 306 is connected to a housing 307.
- Top end plate 201 is located between magnetic actuator 306 and housing 307, and bottom end plate 202 is attached to the opposite end of housing 307.
- Top end plate 201 and bottom end plate 202 permit vacuum interruption device 106 to be mounted to electrical distribution transformer 100.
- Magnetic actuator 306 is mechanically coupled to an insulated pushrod 303.
- Insulated pushrod 303 provides dielectric clearance between vacuum interrupter 310 and magnetic actuator 306.
- a moveable shaft 311 is coupled to insulated pushrod 303.
- a flexible lead mount 304 is connected to moveable shaft 311.
- a flexible connector 308 is coupled to flexible lead mount 304.
- Flexible connector 308 passes through housing 307 and is coupled to busbar 109 via a terminal 309.
- Flexible connector 308 and flexible lead mount 304 allow an electrical connection between a moving part (i.e., moveable shaft 311) and a stationary part (i. e., busbar 109).
- Moveable shaft 311 passes through flexible lead mount 304 and into vacuum interrupter 310.
- a metal bellow (not shown) seals vacuum interrupter 310, while permitting moveable shaft 311 to move freely with the motion of insulated pushrod 303.
- Vacuum interrupter 310 is connected to busbar 204.
- Busbar 204 may then be connected either to transformer winding 103, a high voltage output bushing 315, or both. All of the following are located within housing 307: insulated pushrod 303, flexible lead mount 304, flexible connector 308, vacuum interrupter 310, and moveable shaft 311.
- busbar 109 In operation, when vacuum interrupter 310 is in a closed position, busbar 109 conducts high voltage power through terminal 309 and on to flexible connector 308. Flexible connector 308 then conducts the high voltage power through vacuum interrupter 310 and onto busbar 204. Busbar 204 conducts the high voltage power either to transformer winding 103, high voltage output bushing 315 , or both.
- an overload or fault condition occurs, the condition is sensed by a current or voltage transformer 312.
- the output of current or voltage transformer 312 is monitored by control device 302. Based on logic programmed within control device 302, when control device 302 notices an overload condition from current or voltage transformer 312, a signal 314 is sent to magnetic actuator 306.
- Signal 314 may be a current or voltage-based signal. As discussed further with reference to Figures 4A and 4B, signal 314 then causes magnetic actuator 306 to either open or close vacuum interrupter 310.
- FIGS 4A and 4B are cross-section views of .vacuum interrupter 310, in a closed and opened position, respectively.
- vacuum interrupter 310 includes moveable shaft 311 coupled to movable contact 401, and a stationary contact 402 coupled to busbar 204.
- Moveable contact 401 freely moves in a downward direction shown by arrow 404, and in an upward direction shown by arrow 405.
- Vacuum interrupter 310 is a sealed device containing an evacuated interior 403.
- Evacuated interior 403 of vacuum interrupter 310 provides an environment by which the arc drawn between moving contact 401 and stationary contact 402 can be controlled.
- Vacuum interrupter 310 may be a commercially available vacuum interrupter, for example, part no.
- Figure 4B illustrates what occurs when magnetic actuator 306 senses a current overload condition or when magnetic actuator 306 is signaled by control device 302 to open vacuum interrupter 310.
- signal 314 has an opposite polarity from the "closed" current signal discussed with reference in Figure 4A.
- signal 314 is of sufficient value to momentarily cancel the strength of the permanent magnets (not shown) and de-compress spring 301, thus separating stationary contact 402 and moving contact 401.
- vacuum interrupter 310 opens the connection between busbar 204 and busbar 109, thus interrupting the current flow to transformer winding 103 and/or high voltage output bushing 315.
- magnetic actuator 306 may be actuated to open vacuum interrupter 310, independent of an overload condition, via control device 302.
- control device 302 may be used to purposely interrupt the current flow to transformer winding 103 or high voltage output bushing 315.
- Such an interruption event may be conducted to protect transformer winding 103 or the downstream distribution system from current overload conditions, or for testing and maintenance purposes, for example.
- control device 302 may be remotely electrically operated a safe distance from vacuum interruption device 106. Once the interruption condition is removed, magnetic actuator 306 moves movable contact 401 in downward direction 404 with movable shaft 311, thus closing the circuit between busbar 204 and transformer winding 103, as shown in Figure 4A.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Transformer Cooling (AREA)
- Gas-Insulated Switchgears (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0111026-8A BR0111026A (en) | 2000-05-23 | 2001-05-21 | Combination of an oil filled vacuum interrupter and transformer |
DE10291282T DE10291282T5 (en) | 2000-05-23 | 2001-05-21 | Combination of a vacuum interrupter and an oil-filled transformer |
MXPA02011566A MXPA02011566A (en) | 2000-05-23 | 2001-05-21 | Combination of a vacuum interruption device and oil filled transformer. |
CA002410703A CA2410703A1 (en) | 2000-05-23 | 2001-05-21 | Combination of a vacuum interruption device and oil-filled transformer |
AU2001268746A AU2001268746A1 (en) | 2000-05-23 | 2001-05-21 | Combination of a vacuum interruption device and oil-filled transformer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57697600A | 2000-05-23 | 2000-05-23 | |
US09/576,976 | 2000-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001091151A1 true WO2001091151A1 (en) | 2001-11-29 |
Family
ID=24306776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/040771 WO2001091151A1 (en) | 2000-05-23 | 2001-05-21 | Combination of a vacuum interruption device and oil-filled transformer |
Country Status (7)
Country | Link |
---|---|
CN (1) | CN1439165A (en) |
AU (1) | AU2001268746A1 (en) |
BR (1) | BR0111026A (en) |
CA (1) | CA2410703A1 (en) |
DE (1) | DE10291282T5 (en) |
MX (1) | MXPA02011566A (en) |
WO (1) | WO2001091151A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005089069A2 (en) * | 2004-03-23 | 2005-09-29 | Samrakshana Electricals Ltd. | A circuit breaker for using as overload cut out in oil filled transformers |
EP2600377A1 (en) * | 2011-11-29 | 2013-06-05 | ABB Technology AG | A multiphase medium voltage vacuum contactor |
EP3379555A1 (en) | 2017-03-21 | 2018-09-26 | ABB Schweiz AG | A disconnecting system for current interruption in a transformer |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3626125A (en) * | 1968-11-22 | 1971-12-07 | Tokyo Shibaura Electric Co | Leak detecting means for vacuum switches |
US3958156A (en) * | 1974-10-21 | 1976-05-18 | Allis-Chalmers Corporation | Vacuum interrupter metal-clad switchgear vertically elevatable within compartment |
US4663504A (en) * | 1983-04-11 | 1987-05-05 | Raychem Corporation | Load break switch |
US5175403A (en) * | 1991-08-22 | 1992-12-29 | Cooper Power Systems, Inc. | Recloser means for reclosing interrupted high voltage electric circuit means |
US5387772A (en) * | 1993-11-01 | 1995-02-07 | Cooper Industries, Inc. | Vacuum switch |
US5597992A (en) * | 1994-12-09 | 1997-01-28 | Cooper Industries, Inc. | Current interchange for vacuum capacitor switch |
-
2001
- 2001-05-21 WO PCT/US2001/040771 patent/WO2001091151A1/en active Application Filing
- 2001-05-21 AU AU2001268746A patent/AU2001268746A1/en not_active Abandoned
- 2001-05-21 CA CA002410703A patent/CA2410703A1/en not_active Abandoned
- 2001-05-21 DE DE10291282T patent/DE10291282T5/en not_active Withdrawn
- 2001-05-21 MX MXPA02011566A patent/MXPA02011566A/en unknown
- 2001-05-21 BR BR0111026-8A patent/BR0111026A/en not_active IP Right Cessation
- 2001-05-21 CN CN01809604A patent/CN1439165A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3626125A (en) * | 1968-11-22 | 1971-12-07 | Tokyo Shibaura Electric Co | Leak detecting means for vacuum switches |
US3958156A (en) * | 1974-10-21 | 1976-05-18 | Allis-Chalmers Corporation | Vacuum interrupter metal-clad switchgear vertically elevatable within compartment |
US4663504A (en) * | 1983-04-11 | 1987-05-05 | Raychem Corporation | Load break switch |
US5175403A (en) * | 1991-08-22 | 1992-12-29 | Cooper Power Systems, Inc. | Recloser means for reclosing interrupted high voltage electric circuit means |
US5387772A (en) * | 1993-11-01 | 1995-02-07 | Cooper Industries, Inc. | Vacuum switch |
US5597992A (en) * | 1994-12-09 | 1997-01-28 | Cooper Industries, Inc. | Current interchange for vacuum capacitor switch |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005089069A2 (en) * | 2004-03-23 | 2005-09-29 | Samrakshana Electricals Ltd. | A circuit breaker for using as overload cut out in oil filled transformers |
WO2005089069A3 (en) * | 2004-03-23 | 2006-10-26 | Samrakshana Electricals Ltd | A circuit breaker for using as overload cut out in oil filled transformers |
EP2600377A1 (en) * | 2011-11-29 | 2013-06-05 | ABB Technology AG | A multiphase medium voltage vacuum contactor |
WO2013079284A1 (en) * | 2011-11-29 | 2013-06-06 | Abb Technology Ag | A multiphase medium voltage vacuum contactor |
KR20140099228A (en) * | 2011-11-29 | 2014-08-11 | 에이비비 테크놀로지 아게 | A multiphase medium voltage vacuum contactor |
US9418810B2 (en) | 2011-11-29 | 2016-08-16 | Abb Technology Ag | Multiphase medium voltage vacuum contactor |
KR101973223B1 (en) | 2011-11-29 | 2019-04-26 | 에이비비 슈바이쯔 아게 | A multiphase medium voltage vacuum contactor |
EP3379555A1 (en) | 2017-03-21 | 2018-09-26 | ABB Schweiz AG | A disconnecting system for current interruption in a transformer |
WO2018171930A1 (en) | 2017-03-21 | 2018-09-27 | Abb Schweiz Ag | A disconnecting system for current interruption in a transformer |
Also Published As
Publication number | Publication date |
---|---|
AU2001268746A1 (en) | 2001-12-03 |
CA2410703A1 (en) | 2001-11-29 |
CN1439165A (en) | 2003-08-27 |
DE10291282T5 (en) | 2004-04-29 |
BR0111026A (en) | 2003-06-17 |
MXPA02011566A (en) | 2003-06-06 |
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