CN103259249B - Power transformer overheating fusing protective device - Google Patents
Power transformer overheating fusing protective device Download PDFInfo
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- CN103259249B CN103259249B CN201310193745.XA CN201310193745A CN103259249B CN 103259249 B CN103259249 B CN 103259249B CN 201310193745 A CN201310193745 A CN 201310193745A CN 103259249 B CN103259249 B CN 103259249B
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Abstract
The invention discloses a power transformer overheating fusing protective device which can solve the problem that a coil winding is burnt caused by the situation that a small-and-medium sized power transformer is overloaded or top oil temperature exceeds a permissible value. The power transformer overheating fusing protective device is internally installed in a high voltage side wiring bushing of a transformer, and is connected with the high voltage side input end of the transformer in series, and a ring seat on the bottom of the wiring bushing is inserted below an upper cover of the transformer, is dipped into conduction oil of the transformer, and directly senses oil temperature changes. When load of the transformer is oversized or the temperature is high to reach a critical value, an overcurrent insurance fuse wire section or a melt crimping pipe in the device is fused, and power supply of a coil of the transformer is cut. The coil of the transformer is prevented from being burnt, and the transformer is protected.
Description
Technical field
The invention belongs to distribution equipment field, specifically the overheated fuse protecting device of power transformer.
Background technology
Power transformer is all set with rated capacity, and do overcurrent protection by the peripheral current limiting safeguard installed, but because human factor may cause overcurrent insurance definite value too high, once transformer output current is excessive, transformer overload can be made to run, the operating current of transformer exceedes rated current, its winding coil load loss sharply increases, coil heating also causes transformer oil temperature to raise, coil temperature reaches critical value, and coil insulation paint is by aged deterioration and make insulation resistance decline and flashover short circuit occurs burn coil; In addition transformer be in for a long time more than 75 DEG C hot operations also can cause coil insulation decline, the lost of life; the hot operation of transformer to the operation of transformer and the life-span very harmful; can protect transformer by the mode installing heat abstractor or temperature monitoring and automatic cutting equipment additional in transformer periphery for high-power transformer, but cost is higher and have requirement to installation environment.Middle-size and small-size power transformer for substantial amounts is then many does not possess the condition of installing automatic proterctive equipment, and makes middle-size and small-size power transformer overload or top oil exceed permissible value, and the situation causing coil windings to be burnt often occurs.
Summary of the invention
The present invention is for exceed permissible value for middle-size and small-size power transformer overload or top oil, cause coil windings burn observations, and the overheated fuse protecting device of power transformer proposed, comprise conducting rod, insulated tube and connecting sleeve, described conducting rod overlaps from top to bottom successively ceramic gland, caulking gum ball, sleeve pipe gland and fixed sleeving, and by the clamp nut group of ceramic gland upper end and conducting rod is spirally connected and each device of adapter sleeve on conducting rod that be spirally connected of fixed sleeving and locking hold-down nut, the whorl side that has of the internal thread that fixed sleeving is provided with by lower end and pipe nipple is spirally connected, pipe nipple insert described insulated tube upper end without whorl side, and connect hole rivet connection by the pipe nipple that insulated tube upper end has, the middle and lower part of insulated tube has pod apertures, insulated tube lower end be inserted with fusible link base upper end without screw thread tubular district, and pass through the holes on base rivet interlacement of insulated tube lower end, outside insulated tube, cover has insulating bar, and the pipe nipple that has corresponding with insulated tube on insulating bar connects hole and holes on base,
The bolt that the wiring fixing hole that described conducting rod is had by its lower end and hole thereof screw in is fixedly connected with the upper end of the first connection wire, first lower end connecting wire is connected with the upper end that overcurrent insures fuse segment, first connection wire insures fuse segment junction first with overcurrent and is connected lower end wire being connected with drawing back-moving spring, the upper end of drawing back-moving spring is fixed on conducting rod by the spring eye that conducting rod lower end has, the lower end of overcurrent insurance fuse segment is connected wire upper end with second connects, what the second lower end connecting wire was provided with by fusible link base is bolted on fusible link base, second connects wire is divided into upper part and lower part, be connected by melt aluminium hydraulic pressed connecting pipe between upper part with lower part,
Described sleeve pipe gland at least has a screw, each screw place has all been bolted gland seal hook, and the lower end of sleeve pipe gland has snapped in sealing ring; Fusible link base lower end is bolted with sleeve pipe insurance base, and sleeve pipe insurance base has been bolted terminal block;
Top and the gland seal hook corresponding position of described connecting sleeve have groove, and connecting sleeve bottom casing wall has with terminal block corresponding position insure for mounting sleeve the opening slot that base and terminal block and transformer coil go between.
Described insulated tube and insulating bar all adopt glass-reinforced plastic material to make.
Sealing ring is equipped with transformer contact position bottom described connecting sleeve.
Beneficial effect of the present invention: the overheated fuse protecting device of this power transformer is owing to adopting said structure, high-pressure side powers from conducting rod and imports, connect wire, overcurrent insurance fuse segment, the second connection terminating wire plate etc. by way of first and enter transformer, when transformer overload degree exceedes greatly permissible value, overcurrent insurance fuse segment disconnects, and stops the operation of transformer; Bottom connecting sleeve, ring seat inserts below transformer upper cover, be immersed in transformer conduction oil, direct perception oil temperature change, when temperature of oil in transformer rises to critical value, the melt aluminium hydraulic pressed connecting pipe be made up of definite value low-temperature melt deforms softening or melts, and makes the connection wire intensity of colding pressing drop to disappearance, the traction action of Tensile formula back-moving spring, connect wire to be separated from the crimping fast quick-break in district is de-, the controlled phase power failure of high voltage side of transformer and stop coil working, avoid transformer to burn.Effectively solve middle-size and small-size power transformer overload or top oil exceedes permissible value, cause coil windings burnout problems.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of invention;
Fig. 2 is the structural representation after Fig. 1 installs hot fuse wire group;
Fig. 3 is the structural representation before Fig. 2 installs connecting sleeve;
Fig. 4 is that schematic diagram is partly cutd open in the local after Fig. 3 installs connecting sleeve.
1-conducting rod in figure, 2-pottery gland, 3-caulking gum ball, 4-sleeve pipe gland, 5-fixed sleeving, 6-clamp nut group, 7-hold-down nut, 8-pipe nipple, 9-insulated tube, 10-pipe nipple connects hole, 11-pod apertures, 12-insulating bar, 13-fusible link base, 14-is without screw thread tubular district, 15-holes on base, 16-melt aluminium hydraulic pressed connecting pipe, 17-first connects wire, 18-second connects wire, 19-overcurrent insurance fuse segment, the drawing back-moving spring of 20-, 21-wiring fixing hole, 22-spring eye, 23-bolt, 24-screw, 25-gland seal hook, 26-sealing ring, 27-sleeve pipe insurance base, 28-terminal block, 29-connecting sleeve, 30-groove, 31-opening slot.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
The overheated fuse protecting device of power transformer, comprises conducting rod 1, insulated tube 9 and connecting sleeve 29;
Composition graphs 1: described conducting rod 1 overlaps from top to bottom successively ceramic gland 2, caulking gum ball 3, sleeve pipe gland 4 and fixed sleeving 5, and be spirally connected by the clamp nut group of ceramic gland 2 upper end 6 and conducting rod 1 and each device of adapter sleeve on conducting rod 1 that be spirally connected of fixed sleeving 5 and locking hold-down nut 7, the whorl side that has of the internal thread that fixed sleeving 5 is provided with by lower end and pipe nipple 8 is spirally connected, pipe nipple 8 insert described insulated tube 9 upper end without whorl side, and connect hole 10 rivet interlacement by the pipe nipple that insulated tube 9 upper end has, the middle and lower part of insulated tube 9 has pod apertures 11, insulated tube 9 lower end be inserted with fusible link base 13 upper end without screw thread tubular district 14, and pass through holes on base 15 rivet interlacement of insulated tube 9 lower end, outside insulated tube 9, cover has insulating bar 12, and the pipe nipple that has corresponding with insulated tube 9 on insulating bar 12 connects hole 10 and holes on base 15,
Composition graphs 2: described conducting rod 1 is by its lower end, , the bolt that the wiring fixing hole 21 had and hole thereof screw in is fixedly connected with the upper end of the first connection wire 17, according to structure, its conducting rod 1 lower end is in insulated tube 9, first lower end connecting wire 17 is connected with the upper end that overcurrent insures fuse segment 19, first connection wire 17 insures fuse segment 19 junction first with overcurrent and is connected lower end wire 17 being connected with drawing back-moving spring 20, the upper end of drawing back-moving spring 20 is fixed on conducting rod 1 by the spring eye 22 that conducting rod 1 lower end has, the lower end of overcurrent insurance fuse segment 19 is connected wire 18 upper end with second connects, second lower end connecting wire 18 is fixed on fusible link base 13 by the bolt 23 that fusible link base 13 is provided with, second connects wire 18 is divided into upper part and lower part, be connected by melt aluminium hydraulic pressed connecting pipe 16 between upper part with lower part, specifically second connects the upper part of wire 18 and lower part through melt aluminium hydraulic pressed connecting pipe 16, then melt aluminium hydraulic pressed connecting pipe 16 is shriveled, thus the upper part of the second connection wire 18 this just disconnected and lower part couple together, after overcurrent insurance fuse segment 19 or melt aluminium hydraulic pressed connecting pipe 16 fuse, the hot fuse wire group two sections disconnected are pulled away from by drawing back-moving spring 20, this melt aluminium hydraulic pressed connecting pipe 16 is formed primarily of Bi, Sn, Pb, Ca,
Composition graphs 3: described sleeve pipe gland 4 at least has 2 screws 24, each screw 24 place has all been bolted gland seal hook 25, and the lower end of sleeve pipe gland 4 has snapped in sealing ring 26; Fusible link base 13 lower end is bolted with sleeve pipe insurance base 27, and sleeve pipe insurance base 27 has been bolted terminal block 28;
Composition graphs 4: top and gland seal hook 25 corresponding position of described connecting sleeve 29 have groove 30, and connecting sleeve 29 bottom casing wall has with terminal block 28 corresponding position insure for mounting sleeve the opening slot 31 that base 27 and terminal block 28 and transformer coil go between.
Described insulated tube and insulating bar all adopt glass-reinforced plastic material to make.
Sealing ring is provided with transformer contact position bottom described connecting sleeve.
From above structure, this device is arranged in high voltage side of transformer inlet wire porcelain bushing, on transformer whole structure without impact, directly replaces original wiring construction.Bottom connecting sleeve 29, ring seat inserts below transformer upper cover, be immersed in transformer conduction oil, direct perception oil temperature change, when temperature of oil in transformer rises to critical value, the melt aluminium hydraulic pressed connecting pipe 16 be made up of definite value low-temperature melt deforms softening or melts, the connection wire intensity of colding pressing is made to drop to disappearance, the traction action of Tensile formula back-moving spring 20, connect wire to be separated from the crimping fast quick-break in district is de-, the controlled phase power failure of high voltage side of transformer and stop coil working, during overcurrent, overcurrent insurance fuse segment 19 fuses, stop transformer work, transformer is avoided to burn.
After transformer thermel protection device fuses, the secondary that can carry out hot melt insurance reassembles recovery heat protective device normal condition.First respectively to low-pressure side and the high-pressure side wiring cut-out of transformer; open transformer thermel protection device terminal upper cover; screw off hot melt fuse; pull down insulated tube lock screw; clean out thermal fuse component remains and according to the corresponding thermal fuse component that installation procedure more renews, in sleeve pipe, be reinstalled hot melt fuse and recover transformer-supplied and namely complete and reassemble.
Transformer is made to be in open-phase running status for preventing single cover thermel protection device generation protection act; load at least installs 2 cover thermel protection devices without the transformer of open-phase protection; can control under Thermal protection state to power with the high-pressure side of disconnecting transformer at least two-phase; the power supply stopping transformer exports, thus reaches the consequence avoiding transformer working condition to heat up further and burn.
Claims (3)
1. the overheated fuse protecting device of power transformer, comprise conducting rod (1), insulated tube (9) and connecting sleeve (29), it is characterized in that: described conducting rod (1) overlaps from top to bottom successively ceramic gland (2), caulking gum ball (3), sleeve pipe gland (4) and fixed sleeving (5), and be spirally connected by the clamp nut group (6) of ceramic gland (2) upper end and conducting rod (1) and each device of adapter sleeve on conducting rod (1) that be spirally connected of fixed sleeving (5) and locking hold-down nut (7), the whorl side that has of the internal thread that fixed sleeving (5) is provided with by lower end and pipe nipple (8) is spirally connected, pipe nipple (8) insert described insulated tube (9) upper end without whorl side, and connect hole (10) rivet interlacement by the pipe nipple that insulated tube (9) upper end has, the middle and lower part of insulated tube (9) has pod apertures (11), insulated tube (9) lower end be inserted with fusible link base (13) upper end without screw thread tubular district (14), and pass through holes on base (15) rivet interlacement of insulated tube (9) lower end, insulated tube (9) outside cover has insulating bar (12), and upper the have pipe nipple corresponding with insulated tube (9) of insulating bar (12) connects hole (10) and holes on base (15),
The bolt that the wiring fixing hole (21) that described conducting rod (1) is had by its lower end and hole thereof screw in is fixedly connected with the upper end of the first connection wire (17), first lower end connecting wire (17) is connected with the upper end that overcurrent insures fuse segment (19), first connection wire (17) is insured fuse segment (19) junction first with overcurrent and is connected lower end wire (17) being connected with drawing back-moving spring (20), the upper end of drawing back-moving spring (20) is fixed on conducting rod (1) by the spring eye (22) that conducting rod (1) lower end has, the lower end of overcurrent insurance fuse segment (19) is connected wire (18) upper end with second connects, the bolt (23) that second lower end connecting wire (18) is provided with by fusible link base (13) is fixed on fusible link base (13), second connects wire (18) is divided into upper part and lower part, be connected by melt aluminium hydraulic pressed connecting pipe (16) between upper part with lower part,
Described sleeve pipe gland (4) at least has 2 screws (24), each screw (24) place has all been bolted gland seal hook (25), and the lower end of sleeve pipe gland (4) has snapped in sealing ring (26); Fusible link base (13) lower end is bolted with sleeve pipe insurance base (27), and sleeve pipe insurance base (27) has been bolted terminal block (28);
Top and gland seal hook (25) corresponding position of described connecting sleeve (29) have groove (30), and connecting sleeve (29) bottom casing wall has with terminal block (28) corresponding position insure for mounting sleeve the opening slot (31) that base (27) and terminal block (28) and transformer coil go between.
2. the overheated fuse protecting device of power transformer according to claim 1, is characterized in that: described insulated tube (9) and insulating bar (12) all adopt glass-reinforced plastic material to make.
3. the overheated fuse protecting device of power transformer according to claim 1, is characterized in that: described connecting sleeve (29) bottom is equipped with sealing ring with transformer contact position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193745.XA CN103259249B (en) | 2013-05-23 | 2013-05-23 | Power transformer overheating fusing protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193745.XA CN103259249B (en) | 2013-05-23 | 2013-05-23 | Power transformer overheating fusing protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103259249A CN103259249A (en) | 2013-08-21 |
| CN103259249B true CN103259249B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310193745.XA Active CN103259249B (en) | 2013-05-23 | 2013-05-23 | Power transformer overheating fusing protective device |
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| Country | Link |
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| CN (1) | CN103259249B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511301A (en) * | 2018-05-23 | 2018-09-07 | 河南森源电气股份有限公司 | Fuse and fuse assembly, distribution transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262297Y (en) * | 1996-03-14 | 1997-09-10 | 赵素男 | Anti-theft anti-explosive safety device for high-voltage fuse |
| DE19631533A1 (en) * | 1996-07-24 | 1998-01-29 | Siemens Ag | Load switchgear for HV disconnection of power distribution transformer |
| CN201717218U (en) * | 2010-07-09 | 2011-01-19 | 西安磐石电气设备有限公司 | High-voltage current-limiting full range fuse for protection of transformer |
| CN201812771U (en) * | 2010-10-22 | 2011-04-27 | 西安苏源电器有限公司 | Protective high-voltage current-limiting fuse for wind power generation transformer |
-
2013
- 2013-05-23 CN CN201310193745.XA patent/CN103259249B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262297Y (en) * | 1996-03-14 | 1997-09-10 | 赵素男 | Anti-theft anti-explosive safety device for high-voltage fuse |
| DE19631533A1 (en) * | 1996-07-24 | 1998-01-29 | Siemens Ag | Load switchgear for HV disconnection of power distribution transformer |
| CN201717218U (en) * | 2010-07-09 | 2011-01-19 | 西安磐石电气设备有限公司 | High-voltage current-limiting full range fuse for protection of transformer |
| CN201812771U (en) * | 2010-10-22 | 2011-04-27 | 西安苏源电器有限公司 | Protective high-voltage current-limiting fuse for wind power generation transformer |
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| Publication number | Publication date |
|---|---|
| CN103259249A (en) | 2013-08-21 |
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