CN104112629A - Device for preventing reverse charging of secondary side of voltage transformer - Google Patents
Device for preventing reverse charging of secondary side of voltage transformer Download PDFInfo
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- CN104112629A CN104112629A CN201410302605.6A CN201410302605A CN104112629A CN 104112629 A CN104112629 A CN 104112629A CN 201410302605 A CN201410302605 A CN 201410302605A CN 104112629 A CN104112629 A CN 104112629A
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- air switch
- voltage transformer
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Abstract
The invention relates to voltage transformer protection technology, specifically to a device for preventing reverse charging of a secondary side of a voltage transformer, and solves the problem that existing voltage transformer protection technology cannot completely prevent a reverse charging phenomenon from occurring in a voltage transformer. The device for preventing reverse charging of the secondary side of the voltage transformer includes a three-phase air switch, a first spring, a lock rod, a support, a lever, a top rod, a bimetallic strip, an electric heating element, a reverse charging release, an overcurrent release, an undervoltage release, and a second spring; a right end of the first spring is fixed to a first phase moving contact of the three-phase air switch; a left part side face of the lock rod is fixed to the first phase moving contact, a second phase moving contact and a third phase moving contact of the three-phase air switch; a right end of the lock rod is provided with a first hook-shaped part; a left end of the lever is provided with a second hook-shaped part which are in a clasp joint with the first hook-shaped part; and a right end of the lever is hinged to the support. The device for preventing reverse charging of the secondary side of the voltage transformer in the invention is suitable for a power grid.
Description
Technical field
The present invention relates to voltage transformer resist technology, specifically a kind of voltage transformer secondary side anti-charge device that prevents.
Background technology
Voltage transformer is one of nucleus equipment of electrical network.In actual applications, when voltage transformer is carried out to interruption maintenance, voltage transformer there will be reverse charge phenomenon (secondary side that is voltage transformer charges to primary side), causes thus the person and equipment breakdown.Therefore, generation for fear of the person and equipment breakdown, conventionally adopt at present following methods to prevent that reverse charge phenomenon from appearring in voltage transformer: the primary side isolating switch that pulls open voltage transformer, and take off the primary side fuse of voltage transformer, pull open the secondary side air switch of voltage transformer, and take off the secondary side fuse of voltage transformer, then on the primary side conductor of voltage transformer, install earth connection.Yet practice shows, said method is because operation is too loaded down with trivial details, cause its be easy in actual applications occur switching manipulation error (though such as secondary side air switch do not pull open, insure do not take off, secondary side air switch has pulled open but reality does not disconnect, the conversion of secondary side auxiliary switch is bad etc.) and earth connection error (mistake, neglected loading, installing are lack of standardization causes loose contact etc. such as installing), cause thus it cannot thoroughly prevent that reverse charge phenomenon from appearring in voltage transformer, thereby cannot thoroughly avoid the generation of the person and equipment breakdown.Based on this, be necessary to invent a kind of brand-new voltage transformer protection device, to solve existing voltage transformer resist technology, cannot thoroughly prevent that the problem of reverse charge phenomenon from appearring in voltage transformer.
Summary of the invention
The present invention cannot thoroughly prevent that in order to solve existing voltage transformer resist technology the problem of reverse charge phenomenon from appearring in voltage transformer, and a kind of voltage transformer secondary side anti-charge device that prevents is provided.
The present invention adopts following technical scheme to realize: prevent voltage transformer secondary side anti-charge device, comprise three-phase air switch, the first spring, locking bar, bearing, lever, push rod, bimetal leaf, electric heating element, reverse charge release, overcurrent release, device for under-voltage releasing equipment, the second spring; Wherein, the first-phase moving contact of the right-hand member of the first spring and three-phase air switch is fixed; The left part side of locking bar is fixed with first-phase moving contact, second-phase moving contact, the third phase moving contact of three-phase air switch respectively; The right-hand member of locking bar is provided with the first hook portion; The left end of lever is provided with the second hook portion, and the second hook portion and the mutual clasp joint of the first hook portion; The right-hand member of lever is articulated with on bearing; The top, upper surface of push rod is pressed on the side, middle part of lever; The side, middle part of push rod is provided with the first radial protrusion portion, the second radial protrusion portion, the 3rd radial protrusion portion from top to bottom successively; The right-hand member upper surface of bimetal leaf and the lower surface of push rod are pressed close to; The lower surface of electric heating element and bimetal leaf is pressed close to; The coil two ends of reverse charge release are connected with the second-phase fixed contact two ends of three-phase air switch respectively; The lower surface of the armature movable end of reverse charge release and the first radial protrusion portion is pressed close to; Coil one end of overcurrent release is connected with the third phase fixed contact lower end of three-phase air switch by electric heating element; The lower surface of the armature movable end of overcurrent release and the second radial protrusion portion is pressed close to; The coil two ends of device for under-voltage releasing equipment are connected with second-phase fixed contact lower end with the first-phase fixed contact lower end of three-phase air switch respectively; The lower surface of the armature movable end of device for under-voltage releasing equipment and the 3rd radial protrusion portion is pressed close to; The lower end of the second spring and the armature of device for under-voltage releasing equipment are fixed.
During work, the first-phase fixed contact of three-phase air switch is serially connected in to the first-phase of the secondary side circuit of voltage transformer.The second-phase fixed contact of three-phase air switch is serially connected in to the second-phase of the secondary side circuit of voltage transformer.Third phase by the coil tandem of the third phase fixed contact of three-phase air switch, electric heating element, overcurrent release at the secondary side circuit of voltage transformer.The upper end of the left end of the first spring, bearing, the second spring is all fixed on wall.Specific works process is as follows: one,, when voltage transformer is normally worked, the secondary side circuit of voltage transformer is in on-state.Now, the first-phase moving contact of three-phase air switch contacts with first-phase fixed contact, the second-phase moving contact of three-phase air switch contacts with second-phase fixed contact, the third phase moving contact of three-phase air switch contacts with third phase fixed contact, the second hook portion and the mutual clasp joint of the first hook portion, the first spring is in extended state.Generation current not in the coil of reverse charge release, the armature of reverse charge release is in open mode.Generation current in the coil of overcurrent release, but the electromagnetic attraction that electric current produces is not enough to the armature adhesive of overcurrent release, and now the armature of overcurrent release is in open mode.Generation current in the coil of device for under-voltage releasing equipment, and the electromagnetic attraction that produces of electric current can overcome the pulling force of the second spring and by the armature adhesive of device for under-voltage releasing equipment, now the second spring is in extended state.Two, when there is reverse charge phenomenon in voltage transformer, under the second-phase fixed contact of three-phase air switch, terminal voltage is higher than upper terminal voltage, generation current in the coil of reverse charge release, the electromagnetic attraction that electric current produces is by the armature adhesive of reverse charge release, the armature movable end of reverse charge release is upwards clashed into the first radial protrusion portion, the first radial protrusion portion drives the push rod pushing tow lever that makes progress, lever upwards rotates, the second hook portion is carried out separated with the first hook portion, the first spring resets, and drive the first-phase moving contact of three-phase air switch to be moved to the left, the first-phase moving contact of three-phase air switch and then drive second-phase moving contact and third phase moving contact to be moved to the left by locking bar.Now, the first-phase moving contact of three-phase air switch carries out separated with first-phase fixed contact, the second-phase moving contact of three-phase air switch carries out separated with second-phase fixed contact, the third phase moving contact of three-phase air switch carries out separated with third phase fixed contact, the secondary side circuit of voltage transformer disconnects thus, thereby has prevented reverse charge.Three, when there is over-current phenomenon avoidance in voltage transformer, overcurrent flows through the coil of overcurrent release, the electromagnetic attraction that overcurrent produces is by the armature adhesive of overcurrent release, the armature movable end of overcurrent release is upwards clashed into the second radial protrusion portion, the second radial protrusion portion drives the push rod pushing tow lever that makes progress, lever upwards rotates, the second hook portion and the first hook portion from, the first spring resets, and drive the first-phase moving contact of three-phase air switch to be moved to the left, the first-phase moving contact of three-phase air switch and then drive second-phase moving contact and third phase moving contact to be moved to the left by locking bar.Now; the first-phase moving contact of three-phase air switch carries out separated with first-phase fixed contact; the second-phase moving contact of three-phase air switch carries out separated with second-phase fixed contact; the third phase moving contact of three-phase air switch carries out separated with third phase fixed contact; the secondary side circuit of voltage transformer disconnects thus, thereby has realized overcurrent protection.Four, when there is under-voltage phenomenon in voltage transformer, electric current in the coil of device for under-voltage releasing equipment reduces, the electromagnetic attraction that electric current produces is less than the pulling force of the second spring, the second spring resets, and the armature of device for under-voltage releasing equipment is pulled open, the armature movable end of device for under-voltage releasing equipment is upwards clashed into the 3rd radial protrusion portion, the 3rd radial protrusion portion drives the push rod pushing tow lever that makes progress, lever upwards rotates, the second hook portion and the first hook portion from, the first spring resets, and drive the first-phase moving contact of three-phase air switch to be moved to the left, the first-phase moving contact of three-phase air switch and then drive second-phase moving contact and third phase moving contact to be moved to the left by locking bar.Now; the first-phase moving contact of three-phase air switch carries out separated with first-phase fixed contact; the second-phase moving contact of three-phase air switch carries out separated with second-phase fixed contact; the third phase moving contact of three-phase air switch carries out separated with third phase fixed contact; the secondary side circuit of voltage transformer disconnects thus, thereby has realized under-voltage protection.Based on said process; compare with existing voltage transformer resist technology; of the present inventionly prevent that voltage transformer secondary side anti-charge device is by adopting brand new; saved loaded down with trivial details operation; therefore it there will not be switching manipulation error and earth connection error in actual applications; thoroughly prevented that thus reverse charge phenomenon from appearring in voltage transformer, thereby thoroughly avoided the generation of the person and equipment breakdown.
The present invention is rational in infrastructure, it is ingenious to design, and efficiently solves existing voltage transformer resist technology and cannot thoroughly prevent that the problem of reverse charge phenomenon from appearring in voltage transformer, is applicable to electrical network.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1-three-phase air switch, 2-the first spring, 3-locking bar, 4-bearing, 5-lever, 6-push rod, 7-bimetal leaf, 8-electric heating element, 9-reverse charge release, 10-overcurrent release, 11-device for under-voltage releasing equipment, 12-the second spring.
Embodiment
Prevent voltage transformer secondary side anti-charge device, comprise three-phase air switch 1, the first spring 2, locking bar 3, bearing 4, lever 5, push rod 6, bimetal leaf 7, electric heating element 8, reverse charge release 9, overcurrent release 10, device for under-voltage releasing equipment 11, the second spring 12; Wherein, the first-phase moving contact of the right-hand member of the first spring 2 and three-phase air switch 1 is fixed; The left part side of locking bar 3 is fixed with first-phase moving contact, second-phase moving contact, the third phase moving contact of three-phase air switch 1 respectively; The right-hand member of locking bar 3 is provided with the first hook portion; The left end of lever 5 is provided with the second hook portion, and the second hook portion and the mutual clasp joint of the first hook portion; The right-hand member of lever 5 is articulated with on bearing 4; The top, upper surface of push rod 6 is pressed on the side, middle part of lever 5; The side, middle part of push rod 6 is provided with the first radial protrusion portion, the second radial protrusion portion, the 3rd radial protrusion portion from top to bottom successively; The right-hand member upper surface of bimetal leaf 7 and the lower surface of push rod 6 are pressed close to; Electric heating element 8 is pressed close to the lower surface of bimetal leaf 7; The coil two ends of reverse charge release 9 are connected with the second-phase fixed contact two ends of three-phase air switch 1 respectively; The lower surface of the armature movable end of reverse charge release 9 and the first radial protrusion portion is pressed close to; Coil one end of overcurrent release 10 is connected with the third phase fixed contact lower end of three-phase air switch 1 by electric heating element 8; The lower surface of the armature movable end of overcurrent release 8 and the second radial protrusion portion is pressed close to; The coil two ends of device for under-voltage releasing equipment 11 are connected with second-phase fixed contact lower end with the first-phase fixed contact lower end of three-phase air switch 1 respectively; The lower surface of the armature movable end of device for under-voltage releasing equipment 11 and the 3rd radial protrusion portion is pressed close to; The armature of the lower end of the second spring 12 and device for under-voltage releasing equipment 11 is fixed.
Claims (1)
1. prevent a voltage transformer secondary side anti-charge device, it is characterized in that: comprise three-phase air switch (1), the first spring (2), locking bar (3), bearing (4), lever (5), push rod (6), bimetal leaf (7), electric heating element (8), reverse charge release (9), overcurrent release (10), device for under-voltage releasing equipment (11), the second spring (12); Wherein, the first-phase moving contact of the right-hand member of the first spring (2) and three-phase air switch (1) is fixed; The left part side of locking bar (3) is fixed with first-phase moving contact, second-phase moving contact, the third phase moving contact of three-phase air switch (1) respectively; The right-hand member of locking bar (3) is provided with the first hook portion; The left end of lever (5) is provided with the second hook portion, and the second hook portion and the mutual clasp joint of the first hook portion; The right-hand member of lever (5) is articulated with on bearing (4); The top, upper surface of push rod (6) is pressed on the side, middle part of lever (5); The side, middle part of push rod (6) is provided with the first radial protrusion portion, the second radial protrusion portion, the 3rd radial protrusion portion from top to bottom successively; The lower surface of the right-hand member upper surface of bimetal leaf (7) and push rod (6) is pressed close to; Electric heating element (8) is pressed close to the lower surface of bimetal leaf (7); The coil two ends of reverse charge release (9) are connected with the second-phase fixed contact two ends of three-phase air switch (1) respectively; The armature movable end of reverse charge release (9) and the lower surface of the first radial protrusion portion are pressed close to; Coil one end of overcurrent release (10) is connected with the third phase fixed contact lower end of three-phase air switch (1) by electric heating element (8); The armature movable end of overcurrent release (8) and the lower surface of the second radial protrusion portion are pressed close to; The coil two ends of device for under-voltage releasing equipment (11) are connected with second-phase fixed contact lower end with the first-phase fixed contact lower end of three-phase air switch (1) respectively; The armature movable end of device for under-voltage releasing equipment (11) and the lower surface of the 3rd radial protrusion portion are pressed close to; The armature of the lower end of the second spring (12) and device for under-voltage releasing equipment (11) is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302605.6A CN104112629A (en) | 2014-06-30 | 2014-06-30 | Device for preventing reverse charging of secondary side of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302605.6A CN104112629A (en) | 2014-06-30 | 2014-06-30 | Device for preventing reverse charging of secondary side of voltage transformer |
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| Publication Number | Publication Date |
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| CN104112629A true CN104112629A (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410302605.6A Pending CN104112629A (en) | 2014-06-30 | 2014-06-30 | Device for preventing reverse charging of secondary side of voltage transformer |
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| Country | Link |
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| CN (1) | CN104112629A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597967A (en) * | 2018-01-17 | 2018-09-28 | 安徽中骄智能科技有限公司 | A kind of thermal tripping broken circuit protecting equipment pushing away formula based on sheet metal |
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
| CN109813945A (en) * | 2019-01-21 | 2019-05-28 | 国网山东省电力公司平度市供电公司 | Reaying protection test detects attachment device with PT secondary voltage |
| CN113097023A (en) * | 2021-04-06 | 2021-07-09 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
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| CN2084674U (en) * | 1990-12-12 | 1991-09-11 | 周天飞 | Phase-failure protection socket for three-phase motor |
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| CN204045532U (en) * | 2014-06-30 | 2014-12-24 | 国家电网公司 | Prevent voltage transformer secondary side anti-charge device |
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2014
- 2014-06-30 CN CN201410302605.6A patent/CN104112629A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084674U (en) * | 1990-12-12 | 1991-09-11 | 周天飞 | Phase-failure protection socket for three-phase motor |
| CN2189783Y (en) * | 1994-03-09 | 1995-02-15 | 孙治礼 | Three-phase protecting AC contactor |
| CN1230761A (en) * | 1998-10-27 | 1999-10-06 | 戴岳 | Planar delta phase failure protection method |
| CN102347177A (en) * | 2011-09-19 | 2012-02-08 | 广东天富电气集团有限公司 | Method for operating thermomagnetic circuit breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
| CN108597967A (en) * | 2018-01-17 | 2018-09-28 | 安徽中骄智能科技有限公司 | A kind of thermal tripping broken circuit protecting equipment pushing away formula based on sheet metal |
| CN108597967B (en) * | 2018-01-17 | 2019-09-13 | 安徽中骄智能科技有限公司 | A kind of thermal tripping broken circuit protecting equipment pushing away formula based on sheet metal |
| CN109813945A (en) * | 2019-01-21 | 2019-05-28 | 国网山东省电力公司平度市供电公司 | Reaying protection test detects attachment device with PT secondary voltage |
| CN109813945B (en) * | 2019-01-21 | 2021-01-15 | 国网山东省电力公司平度市供电公司 | PT secondary voltage detection connecting device for relay protection test |
| CN113097023A (en) * | 2021-04-06 | 2021-07-09 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
| CN113097023B (en) * | 2021-04-06 | 2023-09-22 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
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Application publication date: 20141022 |