CN104009403B - Be exclusively used in the repair method to outdoor large transformer - Google Patents
Be exclusively used in the repair method to outdoor large transformer Download PDFInfo
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- CN104009403B CN104009403B CN201410217282.0A CN201410217282A CN104009403B CN 104009403 B CN104009403 B CN 104009403B CN 201410217282 A CN201410217282 A CN 201410217282A CN 104009403 B CN104009403 B CN 104009403B
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Abstract
The invention discloses a kind of repair method be exclusively used in outdoor large transformer, bushing is overhauled, diaphragm type conservator is overhauled, unload dehydrating breather, open the exhaust stopple on conservator top, send into leak detection air pressure, order oil is overflowed from steam vent, close exhaust stopple, install and inhale warm device, open conservator and be connected valve with the oil duct of device body; Utilize conservator draining valve to drain oil in conservator, remove the pipeline passing to and inhale warm device, insulating oil is injected by the valve on transformer, reduce the pressure in diaphragm, secondary lead wires joint is connected securely; The position of the switch number can be provided by indicating dial, when making pointer aim at required tap position, then the screw that is tightened.This repair method is exclusively used in maintenance outdoor large transformer, utilizes rational operating process and method, can carry out careful maintenance to the element of inside transformer, inside transformer is overhauled put in place, the efficiency of maintenance is high, shortens the duration, improves the useful life of transformer.
Description
Technical field
The present invention relates to a kind of method, especially relate to a kind of repair method be exclusively used in outdoor large transformer, belong to electric power overhaul field.
Background technology
Electric power is the energy using electric energy as power.Invent in 19 century 70s, the invention of electric power and application have started second time industrialization climax.Since becoming 18th century of human history, one of three scientific and technological revolutions that the world occurs, from then on science and technology changes the life of people.Even the Internet era of current, we still have the demand of sustainable growth to electric power, because we have invented the product of more use electric power such as computer, household electrical appliances.Constantly the occurring of undeniable new technology makes electric power become the necessity of people.The large-scale electrical power system that 20th century occurred is one of most important achievement in the human engineering history of science, the electrical production be made up of links such as generating, transmission of electricity, power transformation, distribution and electricity consumptions and consume system.Be the epoch of the Internet now, we still have the demand of sustainable growth to electric power, because we have invented the product of more use electric power such as computer, household electrical appliances.(be utilize the principle of electromagnetic induction to change the device of alternating voltage, main member is primary coil, secondary coil and iron core (magnetic core) to transformer.Major function has: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformer) etc.Can be divided into by purposes: distribution transformer, full-sealed transformer, combined transformer, dry-type transformer, oil-filled transformer, single-phase transformer, furnace transformer, rectifier transformer etc.The structural detail of inside transformer is various, what transformer had is arranged on indoor, what have is arranged on outdoor, and especially outdoor transformer is after carrying out long-term use, and its needs severe of operational environment overhaul, ensure its operating efficiency and useful life, and existing maintenance mode to be all operating personnel random, do not have strict repair process, when causing maintenance, efficiency is low, after maintenance, problems do not overcome, and cause be affected the useful life of transformer.
Summary of the invention
The maintenance that the object of the invention is to overcome above-mentioned existing transformer does not have rational maintenance craft method, cause the problem that the error after maintenance is large, devise a kind of repair method be exclusively used in outdoor large transformer, this repair method is exclusively used in maintenance outdoor large transformer, utilize rational operating process and method, careful maintenance can be carried out to the element of inside transformer, inside transformer is overhauled put in place, the efficiency of maintenance is high, shorten the duration, improve the useful life of transformer.
Object of the present invention is achieved through the following technical solutions: be exclusively used in the repair method to outdoor large transformer, comprise the following steps:
(a) dismounting housing, overhaul bushing, the oil level of bushing is too high or too low all should adjust pasta, if oil level is too high can release part oil from drain oil, if oil level is too low, then can inject qualified transformer oil from conservator top oil filler point, check that sleeve pipe is with or without oil impregnate phenomenon, check that whether the rubber washer at plug cock place and tubulose oil meter place is intact, the medium wasting factor tgδ of periodic measurement sleeve pipe and iron core temperature C, if find, the value of medium wasting factor tgδ and iron core temperature C changes suddenly or enlarges markedly, should stop using, check that reason is gone forward side by side row relax, when sleeve pipe causes medium wasting factor tgδ to enlarge markedly because fuse slightly makes moist, drying process can be carried out according to the following steps: oil pipe will be sent to be connected on oil filler point, oil return pipe is connected on drain oil, iterative cycles after injecting by 85 DEG C ± 5 DEG C and through the transformer oil of pass the test, till the medium wasting factor tgδ of sleeve pipe returns to normal level, sleeve pipe is as needed more renew oil, opening drain oil puts oil only, drain oil connects and send oil pipe, oil filler point connects vacuum extractor, vacuumize 8 hours, oiling is carried out after residual pressure is not higher than 1 millimetres of mercury, 8 hours are vacuumized again after oiling, check and find that insulator breaks and interior humidified insulation, when can not process at the scene, new casing should be changed, when sleeve pipe is installed, first shed terminal block and conductive seal head, in centre pipe, outgoing line head of transformer is pulled out, then sleeve pipe is in place, pigtail splice pin is fixed on junction block, to screw on conductive seal head, sealed rubber packing ring is made to compress and use bolt tightening, finally load onto terminal block to install,
B () overhauls diaphragm type conservator:
(1) unload dehydrating breather, replace leak test source of the gas adpting flange, close conservator and be connected valve with the oil duct of device body, open the exhaust stopple on conservator top, send into pressure and be not more than 0.02kg/cm
2or 1.96 × 10
2the leak detection air pressure of pa, order oil is overflowed from steam vent, then closes exhaust stopple, reinstalls and inhale warm device, open conservator and be connected valve with the oil duct of device body;
(2) replacing of diaphragm, dismounting, conservator draining valve is utilized to drain oil in conservator, remove the pipeline passing to and inhale warm device, remove upper flange to sling and to remove the flange be fixed on diaphragm, remove conservator side flange, after taking the suspension hook on diaphragm top, take out diaphragm, ressemble, new barrier film is inserted conservator and fixes diaphragm suspension hook, sealing flange is installed, diaphragm is fixed in upper flange, suction temperature device tube connector is connected to adpting flange, remove and inhale warm device and replace with gas injection flanged valve, open conservator upper discharge hole plug, be 0.02kg/cm by pressure
2air send into diaphragm, make it to reach normal morphology, insulating oil injected by valve on transformer, after oil spill goes out, close exhaust stopple, reduce the pressure in diaphragm, remove gas injection flanged valve, reinstall and inhale warm device, the oil-filled oil level to regulation,
(3) installation of radiator and oil-filled: plug or the plastic seal cap of pulling down radiator, remove silica gel bag, radiator inside is carefully rinsed with the transformer insulation oil of same quality, remove all dustiness and moisture, and carefully check its clean level, pull down the plug of casing top and the bottom adpting flange, but retain plate seal packing ring to ensure sealing, make radiator in place when not removing above-mentioned seal washer, and locking nut of exerting oneself, pore screw must be positioned at top, bracing piece is installed, and on skeleton, have the position of towing pad to be fixed by radiator, oil-filled operation, radiator plug valve is made to keep closed condition, by the insulating oil through process and drying from conservator injection transformer, until reach the highest oil level line in conservator, from the valve of bottom, first open radiator connect valve, and open top plenum screw, inject insulating oil, when the oil level in conservator is down to below minimum oil level line, fill into necessary insulating oil make oil level reach prevailing circumstances temperature under due oil level, oil level in transformer is higher than fuel tank cap, the upper yoke of iron core is immersed in insulating oil, after all radiators are all full of insulating oil, close exhaust stopple, check that the plane of mounting flange has ne-leakage, as found seepage, fasten cap, check whether the sealing gasket of outlet valve seepage occurs simultaneously, if any seepage, again lock sealing liner,
(4) pressure relief device, connects securely by secondary lead wires joint, and the insulation of joint and cable keeps insulation;
(5) shunting switch, main transformer shunting switch, switching device must operate under power failure condition, and the position of the switch number can be provided by indicating dial, can carry out in the following manner: mention pointer with release pin when adjusting voltage, rotation hand wheel is to selected position, unclamp pointer, pin locks by the effect by means of spring, DW-6-110/100-300 no-load tapping switch, for avoid operating mechanism get rusty with keep shunting switch contact good and rotate flexible, at least should carry out full maintenance work every year, back rotation is carried out 10 times to 15 times by kind of shunting switch actuating mechanism, no-load tapping switch must convert tap and use when transformer no-load, when transformer runs, pointer on operating mechanism handle cover, must aim at the Roman capitals 1 be engraved on attic base, 2, 3, 4, on some words in 5, low pressure side's voltage is constant, then the voltage of high pressure side is in position 1, 2, 3, 4, 5 are respectively+5%, + 2.5%, 0%,-2.5%,-5%, the Roman capitals on aligning attic base that pointer on handle cover upper handle cover must be correct are first unscrewed during conversion tap, the moving contact of shunting switch could be correct go to due position, when stopper on handle cover encounters stop column, no matter in any one side of second gear head, all rotary handle cover should do not continued again.Locating pin on axle sleeve between shunting switch and case lid and thousand points of location-plates have lax or fall to falling phenomenon time, should namely to outward winding hold-down screw, take off handle cover, after locating pin or axle sleeve are screwed, put handle cover again and shunting switch is gone to original position and the screw that is tightened, pull handle cover, when making pointer aim at required tap position, then the screw that is tightened;
(6) WTYK temperature controller is installed, is used and adjust:
(A) thermometer bulb is installed: thermometer bulb should fill transformer oil before installing in installing hole, and then slowly insert thermometer bulb and tighten M27 × 2 erection joint, M27 × 2 erection joint there is M16 × 1.5 hollow bolt, its effect is the insertion depth for regulating thermometer bulb, correct installation method is M16 × 1.5 hollow bolt of all back-outing, and be wound around filler (as flax silk or raw material band etc.) drawing on long tube, adjust the insertion depth (selecting maximum insertion depth as far as possible) of thermometer bulb before tightening hollow bolt completely;
(B) wiring: open table cover (unscrewing M6 nut with box spanner) and cable is introduced from introduction hole, and correct wiring;
(C) switch setting: thermostat has two temperature control switchs, all to set arbitrarily within the scope of 0-100 DEG C, slowly red setting handle (in dial lower right side) is stirred with slow with one's hands, pointer is walked about in the direction of the clock, and producing action that is closed or that disconnect, the indicated value read instantaneously in switch motion is design temperature; Design temperature is revised by the adjustment position of the switch, unscrews lock screw; By switch upwards (or downwards) mobile, and then slowly stir red setting handle and read set point temperatures, after wiring and switch setting end-of-job, in statu quo close tight table cover;
(D) thermostat is installed, first mounting panel is fixed on the transformer, hang up isolation spring again, during game clock lid, please impact wrench be select, should tighten symmetrically for 4 during closing lid, during installation, it is the above ring-types of 150 circles that unnecessary sheath capillary should coil, and do suitable fixing every 300 millimeters of reply sheath hand tubules, thermostat should be vertically static in inspection, acceptance checkout equipment thermostat must use oil bath, and should carry out reading in temperature constant after 10 minutes.
Take aforesaid way, the element of inside transformer all can be overhauled and put in place, make the parameter of element can obtain accurate numerical value, ensure that the useful life of transformer, improve operating efficiency.Especially at large-scale outdoor transformer, the structure of its inside is under the impact of external elements, the situation of Natural Damage is more serious than indoor, therefore, need during maintenance to carry out careful test to element, and existing maintenance mode is all overhaul according to the experience of operating personnel, error is very large, also exist and occur undetected phenomenon, affect the work of transformer.
In sum, the invention has the beneficial effects as follows: this repair method is exclusively used in maintenance outdoor large transformer, utilize rational operating process and method, careful maintenance can be carried out to the element of inside transformer, inside transformer is overhauled put in place, the efficiency of maintenance is high, shortens the duration, improves the useful life of transformer.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment 1:
Dismounting housing, overhauls bushing, bushing oil level, too high or too lowly all should adjust pasta.If oil level is too high can release part oil from drain oil; If oil level is too low, then can from the transformer oil of oil filler point injection in conservator top through pass the test.The transformer oil of sprue bushing should meet: the label of oil should be identical with the trade mark that sleeve pipe famous brand marks; The not low 45KV of puncture voltage; 20 DEG C of tg δ values are not more than 0.4%, solidifying point is not higher than-25 DEG C, all the other meet the regulation of GB2536 " transformer oil ", check that sleeve pipe is with or without oil impregnate phenomenon, has, repairs in time, check that whether the rubber washer at plug cock place and tubulose oil meter place is intact, as defectiveness then should be changed, tg δ and C of periodic measurement sleeve pipe, if find, the value of tg and C changes suddenly or enlarges markedly, should stop using, check that reason is gone forward side by side row relax., when sleeve pipe causes tg δ to enlarge markedly because fuse slightly makes moist, drying process can be carried out according to the following steps: oil pipe will be sent to be connected on oil filler point, oil return pipe is connected on drain oil, with 85 DEG C+5 DEG C and through the transformer oil iterative cycles of pass the test, till the tg δ of sleeve pipe returns to normal level, sleeve pipe is as needed more renew oil, opening drain oil puts oil only, drain oil connects and send oil pipe, oil filler point connects vacuum extractor, vacuumize 8 hours, oiling is carried out after residual pressure is not higher than 1 millimetres of mercury, 8 hours are vacuumized again after oiling, check and find that insulator breaks and interior humidified insulation, when can not process at the scene, new casing should be changed.When sleeve pipe is installed, first shed terminal block and conductive seal head, in centre pipe, outgoing line head of transformer is pulled out, then sleeve pipe is in place, pigtail splice pin is fixed on junction block, to screw on conductive seal head, make sealed rubber packing ring compress and use bolt tightening, finally load onto terminal block and install.
Barrier film is overhauled, unloads dehydrating breather, replace leak test source of the gas adpting flange, close conservator and be connected valve with the oil duct of device body.Open the exhaust stopple on conservator top.Send into pressure and be not more than 0.02kg/cm
2or 1.96 × 10
2the leak detection air pressure of pa, order oil is overflowed from steam vent, and this shows that diaphragm is all right.Then exhaust stopple is closed.Reinstall and inhale warm device.Open conservator and be connected valve with the oil duct of device body.The replacing of diaphragm, dismounting, utilize conservator draining valve to drain oil in conservator.Remove the pipeline passing to and inhale warm device.Remove upper flange to sling and to remove the flange be fixed on diaphragm.Remove conservator side flange.After taking the suspension hook on diaphragm top, take out diaphragm.Ressemble, new barrier film is inserted conservator and fixes diaphragm suspension hook.Sealing flange is installed.Diaphragm is fixed in upper flange.Suction temperature device tube connector is connected to adpting flange.Remove and inhale warm device and replace with gas injection flanged valve.Open conservator upper discharge hole plug, pressure is 0.02kg/cm by g
2air send into diaphragm, make it to reach normal morphology.Insulating oil is injected by the valve on transformer.After oil spill goes out, close exhaust stopple.Reduce the pressure in diaphragm, remove gas injection flanged valve.Reinstall and inhale warm device, the oil-filled oil level to regulation.
The installation of radiator and oil-filled, pulls down plug or the plastic seal cap of radiator, removes silica gel bag.Carefully rinse radiator inside with the transformer insulation oil of same quality, remove all dustiness and moisture, and carefully check its clean level.Pull down the plug of casing top and the bottom adpting flange, but retain plate seal packing ring to ensure sealing.Make radiator in place when not removing above-mentioned seal washer, and locking nut of exerting oneself (being necessary sensation when noting locking), pore screw must be positioned at top.Bracing piece is installed, and on skeleton, has the position of towing pad to be fixed by radiator.Oil-filled operation, makes radiator plug valve keep closed condition.By the insulating oil through process and drying from conservator injection transformer, until reach the highest oil level line in conservator.From the valve of bottom, first open radiator connect valve, and open top plenum screw, inject insulating oil.When the oil level in conservator is down to below minimum oil level line, fill into necessary insulating oil make oil level reach prevailing circumstances temperature under due oil level.Very important explanation is: under any circumstance, and the oil level in transformer must not be down to below fuel tank cap, and particularly the upper yoke of iron core must be immersed in insulating oil all the time.After all radiators are all full of insulating oil, close exhaust stopple.Check that the plane of mounting flange has ne-leakage, as found seepage, fastening cap, checking whether the sealing gasket of outlet valve seepage occurs simultaneously, if any seepage, lock sealing liner again.
Pressure relief device, pressure relief device need check that whether secondary lead wires joint is reliable, and whether the insulation of joint and cable is good.
Shunting switch, main transformer shunting switch, owing to being immersed in oil, its electric part Maintenance free, only need carry out visual examination to operation part and compression seal, and these position necessity keep clean.This switching device must operate under power failure condition, and the position of the switch number can be provided by indicating dial, can carry out in the following manner: mention pointer with release pin when adjusting voltage; Rotation hand wheel is to selected position, and unclamp pointer, pin locks by the effect by means of spring.
DW-6-110/100-300 no-load tapping switch, for avoid operating mechanism get rusty with keep shunting switch contact good and rotate flexible, at least should carry out full maintenance work every year, at least 10-15 times are rotated back and forth by kind of shunting switch actuating mechanism, no-load tapping switch must convert tap and use when transformer no-load, when transformer runs, pointer on operating mechanism handle cover, the Roman capitals 1 be engraved on attic base must be aimed at, 2, 3, 4, on some words in 5, low pressure side's voltage is constant, then the voltage of high pressure side is in position 1, 2, 3, 4, 5 are respectively+5%, + 2.5%, 0%,-2.5%,-5%.First unscrew the hold-down screw on handle cover during conversion tap, pull handle cover, when making pointer aim at required tap position, then the screw that is tightened.
Pointer on handle cover must Roman capitals on correct aligning attic base, and what the moving contact of shunting switch could be correct goes to due position, when the stopper on handle cover encounters stop column, no matter in any one side of second gear head, all should not continue rotary handle cover again.Locating pin on axle sleeve between shunting switch and case lid and thousand points of location-plates have lax or fall to falling phenomenon time, should namely to outward winding hold-down screw, take off handle cover, after locating pin or axle sleeve are screwed, then put handle cover and shunting switch is gone to original position and the screw that is tightened.
The test of QJ1-50,80 type Buchholz relays: throw from vent plug the reliability that air can check the action of " signal " contact into, cover is backed out and presses probe, the reliability of " tripping operation " contact action can be checked.
Temperature controller is installed, is used and adjust: thermometer bulb should fill transformer oil before installing in installing hole, and then slowly inserts thermometer bulb and tighten M27 × 2 erection joint.M27 × 2 erection joint there is M16 × 1.5 hollow bolt.Its effect is insertion depth for regulating thermometer bulb, and correct installation method is M16 × 1.5 hollow bolt of all back-outing, and is wound around filler (as flax silk or raw material band etc.) drawing on long tube.The insertion depth (selecting maximum insertion depth as far as possible) of thermometer bulb is adjusted before tightening hollow bolt completely.
Wiring, opens table cover (unscrewing M6 nut with box spanner) and is introduced from introduction hole by cable, and correct wiring.
Thermostat has two temperature control switchs, all to set arbitrarily within the scope of 0-100 DEG C, method is as follows: stir red setting handle (in dial lower right side) slowly with slow with one's hands, pointer is walked about in the direction of the clock, and producing action that is closed or that disconnect, the indicated value read instantaneously in switch motion is design temperature.
Design temperature is revised by the adjustment position of the switch, and its method is as follows: unscrew lock screw (green).By switch upwards (or downwards) mobile, and then slowly stir red setting handle and read set point temperatures.After wiring and switch set end-of-job, in statu quo close tight table cover.
Thermostat is installed, and is first fixed on the transformer by mounting panel, then hangs up isolation spring.Please select impact wrench during game clock lid, should tighten symmetrically for 4 during closing lid, in order to avoid table cover paint film is hindered in control.
During installation, unnecessary sheath capillary should coil be 150 circles with the shape of pressed on ring, do suitable fixing every 300 millimeters of reply sheath hand tubules.Thermostat should be vertically static in inspection, and acceptance checkout equipment thermostat must use oil bath, and should carry out reading in temperature constant after 10 minutes.
Take aforesaid way, the element of inside transformer all can be overhauled and put in place, make the parameter of element can obtain accurate numerical value, ensure that the useful life of transformer, improve operating efficiency.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention, every according to technology of the present invention, method in fact to any simple modification, equivalent variations that above embodiment is done, all fall within protection scope of the present invention.
Claims (1)
1. be exclusively used in the repair method to outdoor large transformer, it is characterized in that, comprise the following steps:
(a) dismounting housing, overhaul bushing, the oil level of bushing is too high or too low all should adjust pasta, if oil level is too high can release part oil from drain oil, if oil level is too low, then can inject qualified transformer oil from conservator top oil filler point, check that sleeve pipe is with or without oil impregnate phenomenon, check that whether the rubber washer at plug cock place and tubulose oil meter place is intact, the medium wasting factor tgδ of periodic measurement sleeve pipe and iron core temperature C, if find, the value of medium wasting factor tgδ and iron core temperature C changes suddenly or enlarges markedly, should stop using, check that reason is gone forward side by side row relax, when sleeve pipe causes medium wasting factor tgδ to enlarge markedly because fuse slightly makes moist, drying process can be carried out according to the following steps: oil pipe will be sent to be connected on oil filler point, oil return pipe is connected on drain oil, iterative cycles after injecting by 85 DEG C ± 5 DEG C and through the transformer oil of pass the test, till the medium wasting factor tgδ of sleeve pipe returns to normal level, sleeve pipe needs more renew oil, opening drain oil puts oil only, drain oil connects and send oil pipe, oil filler point connects vacuum extractor, vacuumize 8 hours, oiling is carried out after residual pressure is not higher than 1 millimetres of mercury, 8 hours are vacuumized again after oiling, check and find that insulator breaks and interior humidified insulation, when can not process at the scene, new casing should be changed, when sleeve pipe is installed, first shed terminal block and conductive seal head, in centre pipe, outgoing line head of transformer is pulled out, then sleeve pipe is in place, pigtail splice pin is fixed on junction block, to screw on conductive seal head, sealed rubber packing ring is made to compress and use bolt tightening, finally load onto terminal block to install,
B () overhauls diaphragm type conservator:
(1) unload dehydrating breather, replace leak test source of the gas adpting flange, close conservator and be connected valve with the oil duct of device body, open the exhaust stopple on conservator top, send into pressure and be not more than 0.02kg/cm
2or 1.96 × 10
2the leak detection air pressure of pa, order oil is overflowed from steam vent, then closes exhaust stopple, reinstalls and inhale warm device, open conservator and be connected valve with the oil duct of device body;
(2) replacing of diaphragm, dismounting, conservator draining valve is utilized to drain oil in conservator, remove the pipeline passing to and inhale warm device, remove upper flange to sling and to remove the flange be fixed on diaphragm, remove conservator side flange, after taking the suspension hook on diaphragm top, take out diaphragm, ressemble, new barrier film is inserted conservator and fixes diaphragm suspension hook, sealing flange is installed, diaphragm is fixed in upper flange, suction temperature device tube connector is connected to adpting flange, remove and inhale warm device and replace with gas injection flanged valve, open conservator upper discharge hole plug, be 0.02kg/cm by pressure
2air send into diaphragm, make it to reach normal morphology, insulating oil injected by valve on transformer, after oil spill goes out, close exhaust stopple, reduce the pressure in diaphragm, remove gas injection flanged valve, reinstall and inhale warm device, the oil-filled oil level to regulation,
(3) installation of radiator and oil-filled: plug or the plastic seal cap of pulling down radiator, remove silica gel bag, radiator inside is carefully rinsed with transformer insulation oil, remove all dustiness and moisture, and carefully check its clean level, pull down the plug of casing top and the bottom adpting flange, but retain plate seal packing ring to ensure sealing, make radiator in place when not removing above-mentioned seal washer, and locking nut of exerting oneself, pore screw must be positioned at top, bracing piece is installed, and on skeleton, have the position of towing pad to be fixed by radiator, oil-filled operation, radiator plug valve is made to keep closed condition, by the insulating oil through process and drying from conservator injection transformer, until reach the highest oil level line in conservator, from the valve of bottom, first open radiator connect valve, and open top plenum screw, inject insulating oil, when the oil level in conservator is down to below minimum oil level line, fill into necessary insulating oil make oil level reach prevailing circumstances temperature under due oil level, oil level in transformer is higher than fuel tank cap, the upper yoke of iron core is immersed in insulating oil, after all radiators are all full of insulating oil, close exhaust stopple, check that the plane of mounting flange has ne-leakage, as found seepage, fasten cap, check whether the sealing gasket of outlet valve seepage occurs simultaneously, if any seepage, again lock sealing liner,
(4) pressure relief device, connects securely by secondary lead wires joint, and the insulation of joint and cable keeps insulation;
(5) shunting switch, main transformer shunting switch, switching device must operate under power failure condition, and the position of the switch number can be provided by indicating dial, can carry out in the following manner: mention pointer with release pin when adjusting voltage, rotation hand wheel is to selected position, unclamp pointer, pin locks by the effect by means of spring, DW-6-110/100-300 no-load tapping switch, for avoid operating mechanism get rusty with keep shunting switch contact good and rotate flexible, at least should carry out full maintenance work every year, back rotation is carried out 10 times to 15 times by kind of shunting switch actuating mechanism, no-load tapping switch must convert tap and use when transformer no-load, when transformer runs, pointer on operating mechanism handle cover, the Roman capitals 1 be engraved on attic base must be aimed at, 2, 3, 4, on some words in 5, low pressure side's voltage is constant, then the voltage of high pressure side is in position 1, 2, 3, 4, 5 are respectively+5%, + 2.5%, 0%,-2.5%,-5%, the Roman capitals on aligning attic base that pointer on handle cover must be correct are first unscrewed during conversion tap, the moving contact of shunting switch could be correct go to due position, when stopper on handle cover encounters stop column, no matter in any one side of second gear head, all should not continue rotary handle cover again, locating pin on axle sleeve between shunting switch and case lid and thousand points of location-plates have lax or fall to falling phenomenon time, should namely to outward winding hold-down screw, take off handle cover, after locating pin or axle sleeve are screwed, put handle cover again and shunting switch is gone to original position and the screw that is tightened, pull handle cover, when making pointer aim at required tap position, be tightened screw again,
(6) WTYK temperature controller is installed, is used and adjust:
(A) thermometer bulb is installed: thermometer bulb should fill transformer oil before installing in installing hole, and then slowly insert thermometer bulb and tighten M27 × 2 erection joint, M27 × 2 erection joint there is M16 × 1.5 hollow bolt, its effect is the insertion depth for regulating thermometer bulb, correct installation method is M16 × 1.5 hollow bolt of all back-outing, and be wound around filler drawing on long tube, adjust the insertion depth of thermometer bulb before tightening hollow bolt completely;
(B) wiring: open table cover, unscrews M6 nut with box spanner, is introduced by cable from introduction hole, and correct wiring;
(C) switch setting: thermostat has two temperature control switchs, all to set arbitrarily within the scope of 0-100 DEG C, to stir red setting handle slowly with slow with one's hands, pointer is walked about in the direction of the clock, and producing action that is closed or that disconnect, the indicated value read instantaneously in switch motion is design temperature; Design temperature is revised by the adjustment position of the switch, unscrews lock screw; Switch is moved up or down, and then slowly stirs red setting handle reading set point temperatures, after wiring and switch set end-of-job, in statu quo close tight table cover;
(D) thermostat is installed, first mounting panel is fixed on the transformer, hang up isolation spring again, during game clock lid, please impact wrench be select, should tighten symmetrically for 4 during closing lid, during installation, it is the above ring-types of 150 circles that unnecessary sheath capillary should coil, and do suitable fixing every 300 millimeters of reply sheath hand tubules, thermostat should be vertically static in inspection, acceptance checkout equipment thermostat must use oil bath, and should carry out reading in temperature constant after 10 minutes.
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| CN201410217282.0A CN104009403B (en) | 2014-05-21 | 2014-05-21 | Be exclusively used in the repair method to outdoor large transformer |
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| CN201410217282.0A CN104009403B (en) | 2014-05-21 | 2014-05-21 | Be exclusively used in the repair method to outdoor large transformer |
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| CN104009403B true CN104009403B (en) | 2015-12-02 |
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| CN107742850B (en) * | 2017-11-10 | 2019-03-29 | 云南省送变电工程公司 | The oil-gas casing assembly and disassembly methods of connection exchange 500kV oil-immersed type transformer and GIS tube type bus |
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|---|---|---|---|---|
| JPH02265223A (en) * | 1989-04-06 | 1990-10-30 | Toshiba Corp | Transformer and its assembly |
| CN102361237A (en) * | 2011-08-17 | 2012-02-22 | 岭澳核电有限公司 | Overhaul method of 500KV transformer in million kilowatt-grade advanced pressurized water reactor nuclear power station |
| CN102684088A (en) * | 2012-06-05 | 2012-09-19 | 邢台供电公司 | Method for dismounting transformer |
| CN103308805A (en) * | 2013-06-18 | 2013-09-18 | 重庆市电力公司万州供电局 | Overhauling method and overhauling system for state of distribution transformer |
-
2014
- 2014-05-21 CN CN201410217282.0A patent/CN104009403B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02265223A (en) * | 1989-04-06 | 1990-10-30 | Toshiba Corp | Transformer and its assembly |
| CN102361237A (en) * | 2011-08-17 | 2012-02-22 | 岭澳核电有限公司 | Overhaul method of 500KV transformer in million kilowatt-grade advanced pressurized water reactor nuclear power station |
| CN102684088A (en) * | 2012-06-05 | 2012-09-19 | 邢台供电公司 | Method for dismounting transformer |
| CN103308805A (en) * | 2013-06-18 | 2013-09-18 | 重庆市电力公司万州供电局 | Overhauling method and overhauling system for state of distribution transformer |
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