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CHU LEI ELECTRIC CO., LTD. is a leading manufacturer, supplier and exporter of Power Transformer, with a factory in Taiwan. We supply and export consistently high class products and continually improve upon the manufacturing processes and work environment through total employee involvement and strict adherence to fair business ethics. We have gained several patents in the field. Our sincerity and hard work has helped us to match our quality with international standards. If you are interested in any styles of our products, please feel free to contact us.

Power Transformer

CHU LEI ELECTRIC CO., LTD.
Shop the best guide of Power Transformer, you need to know about the highest quality of Power Transformer manufacturer, supplier, wholesaler, distributor, OEM and ODM from a factory in Taiwan
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Oil Immersed Transformers   Specification Scope of application This specification applies to the design, supply, installation and testing of oil-immersed transformers and accessories. According to standards and regulations The design, manufacture and test of the transformer must comply with the relevant sections of the latest edition of the standards and regulations listed below. National Standards of the Republic of China (CNS 598, CNS 599) American National Standard (ANSI / IEEE C57.12) International Standard Specification (IEC 60076) Applicable environment The normal use of the transformer is as follows: a. The maximum ambient temperature is below 40 ℃ b. The average daily temperature is below 35 ℃ c. Below 1000 meters above sea level Type Double winding‧Oil-immersed‧Indoor / outdoor Quota a. Number of phases: single phase / three phase b. Frequency: 50Hz / 60Hz c. Capacity: Maximum 7500kVA d. Rated voltage: 36kV / 24kV / 12kV and below e. Primary tap voltage: according to customer needs Polarity or phase sequence a.Single-phase transformer is depolarized b.Three-phase transformer wiring: The primary side is a delta connection, and the secondary side is a Y connection. The primary side voltage is 30 degrees ahead. Symbol: Dyn1 The primary side is a delta connection, and the secondary side is a delta connection. The voltage is in the same phase sequence. Symbol: Dd0 The primary side is Y connection, the secondary side is delta connection, the primary side voltage is 30 degrees ahead, symbol: Yd1 The primary side is Y connection, the secondary side is Y connection, the voltage is in phase sequence, symbol: Yyn0 (Primary side is Y connection, its neutral point is not drawn) Core material and structure a.Silicon steel sheet manufactured by cold rolling directivity, low loss and high magnetic permeability. The laminated core has sufficient insulation layer to resist the erosion effect of hot oil. b.The design of the core clamp must strive to be solid and not subject the core to any stress in order to ensure excellent core characteristics. The strength of the clamp must be able to withstand the vibrations during transportation, installation and normal operation, and it can suppress and reduce the occurrence of noise. Winding a.The winding has a surge-proof design to provide the best protection for shock waves. The coils, winding insulation and lead-out wires are firmly fastened, and can withstand the stress of any group of external wiring connectors when the rated voltage is repeatedly short-circuited. The winding structure is properly arranged to make the temperature difference of the insulating oil between the windings to avoid local overheating. In order to avoid the loosening of the transformer windings due to shrinkage due to heat during the operation, the windings are contracted by hot air and vacuum drying during the manufacturing process and fully tightened. After the assembly of the core and the coil is completed, vacuum drying and vacuum oiling are performed to ensure the quality of the transformer. b.High-voltage conductors use high-conductivity, high-temperature-resistant enamelled copper or aluminum round wires or corner wires, or copper or aluminum corner wires covered with high-temperature-resistant insulation materials to obtain the best interturn insulation and the lowest conductor loss. c.The design of the high-voltage coil is a multi-layer winding method, so that the external surge voltage is uniformly and linearly distributed to obtain the best impulse voltage resistance. d.The voltage lead-out position of the tap of the high-voltage coil should be designed in the middle section of the coil to avoid the high potential area at the coil end and properly handle to ensure the insulation strength of the lead-out wire. e.Low-voltage conductor adopts high-conductivity copper or aluminum sheet conductor, so that no unbalanced ampere turns are generated between the coils, the short-circuit axial mechanical force is minimized, the thermal conductivity is optimal, and the coils will not cause hot spots. f.The insulation layer of resin-coated electrical insulation paper for temperature rise of 65 ℃ is used between the winding layers to obtain the best voltage-resistant insulation ability, the best short-circuit resistance mechanical strength and short-term overload capacity. g.The setting of the coil current density must be able to fully meet the requirements of the short-circuit test to avoid overheating the coil temperature when an external short circuit occurs. Scope of application a.The transformer housing can withstand a pressure 25% higher than the maximum pressure when the oil degradation prevention device is running without permanent deformation. The upper cover is bolted or welded with appropriate manholes or hand holes. All joints and joints are tight and leak-free. A guide post is provided in the casing, which is convenient for the maintenance of the casing and prevents the core and windings from being displaced due to transportation or vibration. There is enough space between the core, windings and the bottom of the shell to allow the accumulation of residues. b.The transformer base has considerable mechanical strength so that the transformer can slide c.All padding surfaces have pad support to prevent the pad from sliding. d.The transformer is equipped with a radiator that is sufficient for self-cooling rating. The material selection, design and manufacturing and corrosion prevention of the heat sink are especially prudent in order to withstand the severe corrosion that may be encountered. e.According to the size of the transformer and the actual needs of the transformer, the manufacturer provides appropriate accessories, such as thermometers, oil level meters, etc. The types and specifications of the accessories must comply with the requirements of CNS 598. If customers have other requirements for accessories, It is agreed between the buyer and the seller. Cooling device a.The cooling device with self-cooling and forced-air cooling double-rated transformers is equipped with control equipment, cooling fans, motors, radiators and piping, etc. as required. The cooling fan is a horizontal axis fan, and its start and stop are automatically controlled by the temperature of the insulating oil via the temperature relay. Automatic and manual operation devices are located in the junction box on the transformer tank. b.The control and signal circuits of all cooling devices are connected to the terminal board in the transformer terminal box. c.The standard cooling fan motor provided by our company is single-phase 60Hz-220V, and its control power is single-phase 60Hz-220V. The power supply is provided by the customer, but it has been specified and listed in the owner's specification. When they are different, they shall be determined according to the required number of phases, voltage or after consultation between the two parties. No-voltage tap changer The transformer is equipped with a voltage-free tap switching device for manual operation outside the casing. The three-phase winding taps are operated simultaneously from the outside by a single handle. The operating device is provided with a position indicator so that the tap voltage position can be clearly and clearly marked. Casing characteristics Insulation distance: The minimum insulation distance in the air between the charging part of the bushing to the grounded metal part and the charging part of the bushing is specified as follows. Nameplate The marking content shall comply with the requirements of CNS 598, and its material shall be made of stainless steel. The following items are marked in Chinese (or English) on the nameplate: (1) Type (2) Phase sequence (3) Number of phases (4) Wiring diagram (5) Rated capacity (kVA) (6) Manufacturing number (7) Rated frequency (Hz) (8) Approximate weight (kg) (9) Rated voltage (10) Oil volume (L) (11) Tap voltage (12) Base Impact Insulation Level (BIL) (13) Temperature rise (14) Manufacturer name (15) Impedance voltage (16) Date Coating treatment The transformer shell must be rust-proof and applied with phosphate film or sandblasting rust-proof treatment. The inner layer is coated with durable oil-based rust-resistant insulating white paint, and the outer layer is weather-resistant rust-proof paint. The outermost color is Taiwan Paint Association Color Card # 41 or designated by the customer. Transformer oil The transformer must be filled with a normal amount of insulating oil. The quality of the insulating oil should meet the requirements of CNS 1326 and CNS 3070. Transformer test a.Voltage ratio test Add the rated voltage of the rated frequency to any coil, use a voltmeter to measure the voltage ratio of each connector, or use T.T.R (transformer turns ratio tester) to measure the voltage ratio of each connector. The error is within ± 0.5%. b.Polarity test Standard transformer comparison methods or other applicable methods of testing transformer polarity meet the requirements of Section 6. c.Induced voltage test For single-phase double-sleeve and three-phase transformer induced voltage tests, apply a test voltage twice the rated voltage to any coil. The test pressure time is: Test pressing time (second) = 120X rated frequency / test frequency d.Open and short test The open-circuit test and short-circuit test can be performed at normal temperature. When the measured no-load current, no-load loss, load loss, impedance voltage, voltage adjustment rate, and efficiency are converted to 75 ° C, they should meet the values in the characteristic table of this specification. e.Insulation compressive strength test Except that the single-phase single-sleeve side does not perform the 60Hz withstand voltage test, each coil of other various transformers is pressurized according to the value specified in the table without any abnormality. (As shown below) f.Temperature rise Winding: The highest winding temperature rise measured by the resistance method must not exceed 65 ° C. Insulating oil: The highest oil temperature rise measured by the thermometer method must not exceed 60 °C. g.Transformer noise Transformer design and manufacturing consider reducing the noise and vibration generated by the transformer. For its reference value, please refer to the characteristics table. h.Test items in the transformer plant: Before leaving the transformer, the following in-plant tests must be performed and a test report submitted. 1. Measurement of insulation resistance 2. Voltage ratio test 3. Polarity or phase sequence test 4. No-load (iron) damage test 5. Load (copper) loss test 6. No-load current test 7. Impedance test 8. Induced voltage test 9. Power frequency withstand voltage test Factory Certification ISO 9001 , ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Warranty One year warranty Delivery method Domestic - truck up to the ground / Foreign - CIF Product features: Excellent heat wave radiator, can be customized, ODM.
CHU LEI ELECTRIC CO., LTD.
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HV Cast Resin Transformer Rectifiers Scope of application This specification includes the following rated capacities, design, manufacturing, testing, handling, installation, and warranty of high-permeability directional silicon steel sheet iron core cast resin transformers for indoor use. Applicable standards Relevant manufacturing and testing standards are in accordance with CNS 13390 or IEC 60076-11 specifications unless otherwise specified by the customer. Applicable conditions a.Load: continuous rated load. b.Location of use: indoor type below 1000 meters above sea level. c.One week temperature: maximum 40 ° C, average 30 ° C per day. d.Relative humidity: up to 100%. Transformer characteristics a.Voltage level: 36kV/24kV/12kV and below b.Number of phases: three phase c.Frequency: 50Hz or 60Hz d.Capacity: Maximum capacity 5000kVA e.Wiring method: Dd0 (+7.5°) y11 (-22.5°) (other wiring can also be made as needed) f.Material: copper-copper, copper-aluminum, aluminum-aluminum g.Polarity: Reduced polarity (for single phase). f. Winding insulation level and voltage resistance: g. Insulation material heat-resistant grade: F-type (or H-grade) heat-resistant grade insulation material is used for the mold dry type. h. Temperature rise limit: The average winding temperature rise measured by resistance method under the ambient temperature of 40 ℃ and the rated load, F-class insulation shall not exceed 100 ℃, and H-class insulation shall not exceed 125 ℃. i. Refer Transformer performance list (at pf = 1, 75 ° C). j. The above performance is a reference value.All performances should be marked based on the final approval information or test report. k. For other specifications transformers, relevant technical data will be provided separately according to customer requirements. Transformer Construction a.core:The cold-rolled directional silicon steel sheet material with high magnetic permeability and low iron loss is laminated with V-notch 5 steplap core method. The surface of the completed core is additionally coated with special resin to prevent moisture And anti-corrosion. The core is grounded and visible to the base. b.fastener: The core is fixed with Slot iron and screws of sufficient strength. The structure of the core and Slot iron is to be solid and stable, and to avoid subjecting the core to external stress to affect iron loss and noise. All fixed metals other than the core have anti-rust treatment. c.coil: High-voltage coils use electrical copper (or aluminum) conductors. The coil insulation is reinforced with a special glass fiber resin, and the resin is poured in an automated pouring equipment and under vacuum. The coil after the resin is poured is cured by heating.Partial discharge test is performed on the high-voltage coil after molding to confirm that it does not contain any Cavity & Air Void so that it has the best electrical and mechanical characteristics.Low-voltage coils are made of copper (or aluminum) conductors and pre-impregnated resin materials (Pre-Impregnated) wound on a mold at the same time and heat-hardened. The resin is poured above and below the coil to increase its strength.After completion, the high and low voltage coils are moisture-proof, non-flammable, non-combustible, and automatically extinguished.The ends of the high and low voltage coils and the upper and lower slot irons are fixed with a support with elastic gaskets to tighten the coil and absorb the thermal expansion and contraction of the coil. d.Terminal: Except for the lead-out terminals of the high-voltage coil, the connecting wires of the live parts are covered with heat-resistant insulation, and all lead-out terminals adopt NEMA standard copper connectors. The terminals of the low-voltage coil are led out by a bus, and the terminal head of the bus should comply with the customer (or NAME standard). e.Tap changer: The high voltage side winding of the transformer is provided with taps that can adjust the voltage under no voltage and current. These taps are drawn from the winding surface so that the voltage of the tap can be switched after the power is cut off (under no voltage state). f.Nameplate (1) Type (2) Phase sequence (3) Number of phases (4) Wiring diagram (5) Rated capacity (kVA) (6) Manufacturing number (7) Rated frequency (Hz) (8) Approximate weight (kg) (9) Rated voltage (10) Tap voltage (11) Base Impact Insulation Level (BIL) (12) Ambient temperature (13) Coil temperature rise (14) Manufacturer name (15) Impedance voltage (16) Date g.Accessories (1) Stainless steel nameplate. (2) The base. (3) Ground connector (4) Lifting ears. h.Select accessories (1) Wheels. (2) The fan. (3) Thermometer. (4) Digital temperature monitor. (The transformer has a three-stage (fan start, warning and trip) temperature controller, which provides contact wiring and is led by the customer.) (5) Shockproof rubber. (6) Earthed screen between primary and secondary windings. i.Outer box protection: (if needed) (1)For IP00 it is only for indoor use. (2)For IP20,it is only for indoor use. (3)For IP23 or above, it can be used outdoors. Test: The following tests are performed before the transformer leaves the factory. 1.Routine test items (each must be tested) (1) Resistance measurement. (2) Turn ratio measurement. (3) Polarity and phase sequence test. (4) Excitation current and no load loss test. (5) Impedance voltage and load loss test. (6) AC test. (7) Induced voltage test. (8) Partial discharge test. (Above 3.3kV) 2.Type test (according to customer's specification but additional charge) (1) Noise test. (2) Temperature rise test. (3) Impulse voltage test. 3.test report: Three complete test reports are provided when leaving the factory, which contain information on the test projects listed above. Warranty: Store for 18 months after delivery or run for 12 months under normal use. Factory Certification: ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Delivery method: Domestic - truck up to the ground / Foreign – CIF Suitable places: MRT and chemical plants, etc. Product features: customized, OEM Customer base: Taipei Volkswagen MRT is customized.
CHU LEI ELECTRIC CO., LTD.
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H Class Dry Type Transformers   Specification According to the standard: CNS 13390 or IEC 60076-11 or national standards Efficiency: Designed according to customer demand efficiency Voltage level: 12kV and below Type:AN Number of phases: single phase or three phase Frequency: 50Hz or 60Hz Wiring method: Dyn1 or Dyn11 (other wiring can also be made as needed) Material: copper-copper, copper-aluminum, aluminum-aluminum Carton protection class:IP00 or IP20 Capacity:below 500kVA Performance:by order design Suitable place: electronic factory, office building, etc. Test: Before leaving the factory, the transformer performs in-plant testing and submits a test report.. Warranty: Store for 18 months after delivery or run for 12 months under normal use. Factory Certification: ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Delivery method: Domestic - truck up to the ground / Foreign – CIF
CHU LEI ELECTRIC CO., LTD.
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Cast Resin Starting Reactor   Specification According to the standard: IEC 60076-6 Efficiency: Designed according to customer demand efficiency Voltage level: 36kV/24kV/12kV and below Number of phases: three phase Frequency: 50Hz or 60Hz Material: copper-copper Rated starting time: 60, 90, 180 seconds Tap type (standard tap) 50% -60% -80% (full pressure start is 100%) Choice of rated time: Rated time ≦ (starting time of the motor) X number of continuous starts  (Note: continuous start is limited to 2 times) Starting current and torque comparison Note:(1) S: starting current, Ts: starting torque        (2) Reactors have similar characteristics to resistors. Features: high mechanical strength, low noise, long life, high efficiency, good moisture resistance, smooth starting torque. Uses: limit motor starting current Test: Before leaving the factory, the transformer performs in-plant testing and submits a test report.. Warranty: Store for 18 months after delivery or run for 12 months under normal use. Factory Certification: ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Delivery method: Domestic - truck up to the ground / Foreign – CIF
CHU LEI ELECTRIC CO., LTD.
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Oil Type Series Reactors   Specification According to standard: CNS 9094 or IEC 60076-6 or JEC-2210 Efficiency: Designed according to customer demand efficiency Voltage level: 36kV/24kV/12kV and below Number of phases: single phase or three phase Frequency: 50Hz or 60Hz Use: In series with the capacitor to limit the capacitor input current. Test: Before leaving the factory, the transformer performs in-plant testing and submits a test report.. Warranty: Store for 18 months after delivery or run for 12 months under normal use. Factory Certification: ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Delivery method: Domestic - truck up to the ground / Foreign – CIF
CHU LEI ELECTRIC CO., LTD.
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HV Cast Resin Transformers (Standard Series)   Specification Scope of application This specification includes the following rated capacities, design, manufacturing, testing, handling, installation, and warranty of high-permeability directional silicon steel sheet iron core cast resin transformers for indoor use. Applicable standards Relevant manufacturing and testing standards are in accordance with CNS 13390 or IEC 60076-11 specifications unless otherwise specified by the customer. Applicable conditions a.Load: continuous rated load. b.Location of use: indoor type below 1000 meters above sea level. c.One week temperature: maximum 40 ° C, average 30 ° C per day. d.Relative humidity: up to 100%. Transformer characteristics a.Rated continuous output capacity: The transformer capacity in this specification refers to the continuous output capacity under the specified temperature rise conditions.If forced air cooling, the output capacity can be increased by 25-40%. The size of the conductor used, including the connection terminals and accessories, is designed with the highest rated capacity. b. Type: double winding, self-cooling, indoor type, resin type dry winding. c. Rated voltage and wiring: according to customer requirements or primary side: △ wiring, secondary side: △ or Y wiring. d.High-voltage coil tap voltage: according to customer requirements or rated voltage ± 2 × 2.5%. e. Polarity: Reduced polarity (for single phase). f. Winding insulation level and voltage resistance: g. Insulation material heat-resistant grade: F-type (or H-grade) heat-resistant grade insulation material is used for the mold dry type. h. Temperature rise limit: The average winding temperature rise measured by resistance method under the ambient temperature of 40 ℃ and the rated load, F-class insulation shall not exceed 100 ℃, and H-class insulation shall not exceed 125 ℃. i. Refer Transformer performance list (at pf = 1, 75 ° C). j. The above performance is a reference value.All performances should be marked based on the final approval information or test report. k. For other specifications transformers, relevant technical data will be provided separately according to customer requirements. Transformer Construction a.core:The cold-rolled directional silicon steel sheet material with high magnetic permeability and low iron loss is laminated with V-notch 5 steplap core method. The surface of the completed core is additionally coated with special resin to prevent moisture And anti-corrosion. The core is grounded and visible to the base. b.fastener: The core is fixed with Slot iron and screws of sufficient strength. The structure of the core and Slot iron is to be solid and stable, and to avoid subjecting the core to external stress to affect iron loss and noise. All fixed metals other than the core have anti-rust treatment. c.coil: High-voltage coils use electrical copper (or aluminum) conductors. The coil insulation is reinforced with a special glass fiber resin, and the resin is poured in an automated pouring equipment and under vacuum. The coil after the resin is poured is cured by heating.Partial discharge test is performed on the high-voltage coil after molding to confirm that it does not contain any Cavity & Air Void so that it has the best electrical and mechanical characteristics.Low-voltage coils are made of copper (or aluminum) conductors and pre-impregnated resin materials (Pre-Impregnated) wound on a mold at the same time and heat-hardened. The resin is poured above and below the coil to increase its strength.After completion, the high and low voltage coils are moisture-proof, non-flammable, non-combustible, and automatically extinguished.The ends of the high and low voltage coils and the upper and lower slot irons are fixed with a support with elastic gaskets to tighten the coil and absorb the thermal expansion and contraction of the coil. d.Terminal: Except for the lead-out terminals of the high-voltage coil, the connecting wires of the live parts are covered with heat-resistant insulation, and all lead-out terminals adopt NEMA standard copper connectors. The terminals of the low-voltage coil are led out by a bus, and the terminal head of the bus should comply with the customer (or NAME standard). e.Tap changer: The high voltage side winding of the transformer is provided with taps that can adjust the voltage under no voltage and current. These taps are drawn from the winding surface so that the voltage of the tap can be switched after the power is cut off (under no voltage state). f.Nameplate (1) Type (2) Phase sequence (3) Number of phases (4) Wiring diagram (5) Rated capacity (kVA) (6) Manufacturing number (7) Rated frequency (Hz) (8) Approximate weight (kg) (9) Rated voltage (10) Tap voltage (11) Base Impact Insulation Level (BIL) (12) Ambient temperature (13) Coil temperature rise (14) Manufacturer name (15) Impedance voltage (16) Date g.Accessories (1) Stainless steel nameplate. (2) The base. (3) Ground connector (4) Lifting ears. h.Select accessories (1) Wheels. (2) The fan. (3) Thermometer. (4) Digital temperature monitor. (The transformer has a three-stage (fan start, warning and trip) temperature controller, which provides contact wiring and is led by the customer.) (5) Shockproof rubber. (6) Earthed screen between primary and secondary windings. i.Outer box protection: (if needed) (1) For IP20, it is only for indoor use. (2) For IP23 or above, it can be used outdoors. Test: The following tests are performed before the transformer leaves the factory. 1.Routine test items (each must be tested) (1) Resistance measurement. (2) Turn ratio measurement. (3) Polarity and phase sequence test. (4) Excitation current and no load loss test. (5) Impedance voltage and load loss test. (6) AC test. (7) Induced voltage test. (8) Partial discharge test. (Above 3.3kV) 2.Type test (according to customer's specification but additional charge) (1) Noise test. (2) Temperature rise test. (3) Impulse voltage test. 3.test report: Three complete test reports are provided when leaving the factory, which contain information on the test projects listed above. Warranty: Store for 18 months after delivery or run for 12 months under normal use. Factory Certification: ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Delivery method: Domestic - truck up to the ground / Foreign – CIF
CHU LEI ELECTRIC CO., LTD.
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HV Amorphous Cast Resin Dry Type Transformers (Standard Series)   Specification Scope of application This specification applies to cast dry type transformers with iron cores made of Amorphous Alloy. According to standards and regulations The design, manufacture and test of the transformer must comply with the relevant sections of the latest edition of the standards and regulations listed below. National Standards of the Republic of China (CNS 13390) International Standard Specification (IEC 60076) Applicable environment The normal use of the transformer is as follows: a. The maximum ambient temperature is below 40 ℃ b. Below 1000 meters above sea level c. Insulation type: F Class Type Cast resin dry type‧AN or AN/AF‧Indoor  Quota a. Number of phases: single phase / three phase b. Frequency: 50Hz / 60Hz c. Capacity: below 3000kVA d. Rated voltage: 36kV / 24kV / 12kV and below e. Primary tap voltage: according to customer needs f. Tap range: ±2.5%, ±5% g. Material: copper-copper, copper-aluminum, aluminum-aluminum h.Rating: IP00 Polarity or phase sequence a.Single-phase transformer is depolarized b.Three-phase transformer wiring: The primary side is a delta connection, and the secondary side is a Y connection. The primary side voltage is 30 degrees ahead. Symbol: Dyn1 The primary side is a delta connection, and the secondary side is a delta connection. The voltage is in the same phase sequence. Symbol: Dd0 The primary side is Y connection, the secondary side is delta connection, the primary side voltage is 30 degrees ahead, symbol: Yd1 The primary side is Y connection, the secondary side is Y connection, the voltage is in phase sequence, symbol: Yyn0 (Primary side is Y connection; its neutral point is not drawn) Core material and structure The core is made of 3-phase 3-pin amorphous alloy magnetic material. The overall structure of each transformer core and its clamps are very strong and solid. The clamps have a solid structure and can evenly distribute the pressure. The vibration of any process during operation ensures that the noise and vibration of the transformer during operation are minimized. Winding a.High-voltage and low-voltage coils are made of copper or aluminum conductors for electrical use. The insulation of the high-voltage coils is made of special glass fiber and reinforced resin. b.Partial discharge test is performed on the molded high voltage coil to confirm that it does not contain any vacuum cavity & air void, so that it has the best electrical and mechanical characteristics. c.Low-voltage windings can be wound with the same design as high-voltage windings or with Prepreg sheet conductors, and sealed with epoxy resin. d.The central shaft tube of the high and low voltage coil and the upper and lower clamps are fixed with an elastic resin support to absorb the expansion and contraction of the coil. e.Ventilation air ducts should be left between high and low voltage coils or each coil to ensure good heat dissipation. f.High and low voltage windings need to be moisture-proof,non-flammable, non-combustible, and self-extinguishing. g.High and low voltage wiring connectors: Except for the lead terminal, the live part of the winding on the high voltage side is covered with heat-resistant insulation, and no live part except the lead terminal is exposed. The connector of the low-voltage side winding needs to be led out by a copper plate. h.Tap switching position: The high-voltage side winding of the transformer must be equipped with taps that can adjust the voltage under no-voltage and no-current conditions, and the distance between each tap must be equal. This tap is led out of the winding surface so that the tap voltage can be adjusted after switching off the power (without voltage). Cooling device The standard cooling fan motor provided by our company is single-phase 60Hz-220V, and its control power is single-phase 60Hz-220V. The power supply is provided by the customer, but it has been specified and listed in the owner's specification. When they are different, they shall be determined according to the required number of phases, voltage or after consultation between the two parties. Nameplate The following items are marked in Chinese (or English) on the nameplate: (1) Type (2) Phase sequence (3) Number of phases (4) Wiring diagram (5) Rated capacity (kVA) (6) Manufacturing number (7) Rated frequency (Hz) (8) Approximate weight (kg) (9) Rated voltage (10) Tap voltage (11) Base Impact Insulation Level (BIL) (12) Ambient temperature (13) Coil temperature rise (14) Manufacturer name (15) Impedance voltage (16) Date Transformer test a.Transformer noise Transformer design and manufacturing consider reducing the noise and vibration generated by the transformer. For its reference value, please refer to the characteristics table. b.Test items in the transformer plant: Before leaving the transformer, the following in-plant tests must be performed and a test report submitted. 1. Measurement of insulation resistance 2. Voltage ratio test 3. Polarity or phase sequence test 4. No-load (iron) damage test 5. Load (copper) loss test 6. No-load current test 7. Impedance test 8. Induced voltage test 9. Power frequency withstand voltage test Factory Certification ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Warranty One year warranty Delivery method  Domestic - truck up to the ground / Foreign – CIF Product features a.Made of high magnetic permeability and low hysteresis amorphous alloy material, this greatly reduces iron loss. b.The coil structure is improved, and the surge protection design with sufficient shock wave resistance is provided. c.Anti-harmonic design ensures that system harmonic effects do not cause overheating or other damage. d.The efficiency is improved compared with the general type, achieving energy-saving and environmentally friendly functions. e.Received the green environmental protection stamp of the Environmental Protection Agency of the Executive Yuan and super power saving.
CHU LEI ELECTRIC CO., LTD.
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HV Amorphous Oil Immersed Transformers (Standard Series)  Specification Scope of application This specification applies to oil-immersed, transformers with iron cores made of Amorphous Alloy. According to standards and regulations The design, manufacture and test of the transformer must comply with the relevant sections of the latest edition of the standards and regulations listed below. National Standards of the Republic of China (CNS 598, CNS 599) American National Standard (ANSI / IEEE C57.12) International Standard Specification (IEC 60076) Applicable environment The normal use of the transformer is as follows: a. The maximum ambient temperature is below 40 ℃ b. The average daily temperature is below 35 ℃ c. Below 1000 meters above sea level Type Double winding‧Amorphous oil-immersed‧Indoor / outdoor Quota a. Number of phases: single phase / three phase b. Frequency: 50Hz / 60Hz c. Capacity: below 3500kVA d. Rated voltage: 36kV / 24kV / 12kV and below e. Primary tap voltage: according to customer needs Polarity or phase sequence a.Single-phase transformer is depolarized b.Three-phase transformer wiring: The primary side is a delta connection, and the secondary side is a Y connection. The primary side voltage is 30 degrees ahead. Symbol: Dyn1 The primary side is a delta connection, and the secondary side is a delta connection. The voltage is in the same phase sequence. Symbol: Dd0 The primary side is Y connection, the secondary side is delta connection, the primary side voltage is 30 degrees ahead, symbol: Yd1 The primary side is Y connection, the secondary side is Y connection, the voltage is in phase sequence, symbol: Yyn0 (Primary side is Y connection; its neutral point is not drawn) Core material and structure a.Transformer core should be made of ultra-low iron loss amorphous alloy produced by Japan Hitachi Metals Co., Ltd., with Lap-Joint Core structure to obtain ultra-low iron loss, low exciting current and low noise characteristic. b.The design of the core clamp must strive to be solid and not subject the core to any stress in order to ensure excellent core characteristics. The strength of the clamp must be able to withstand the vibrations during transportation, installation and normal operation, and it can suppress and reduce the occurrence of noise. Winding a.The winding has a surge-proof design to provide the best protection for shock waves. The coils, winding insulation and lead-out wires are firmly fastened, and can withstand the stress of any group of external wiring connectors when the rated voltage is repeatedly short-circuited. The winding structure is properly arranged to make the temperature difference of the insulating oil between the windings to avoid local overheating. In order to avoid the loosening of the transformer windings due to shrinkage due to heat during the operation, the windings are contracted by hot air and vacuum drying during the manufacturing process and fully tightened. After the assembly of the core and the coil is completed, vacuum drying and vacuum oiling are performed to ensure the quality of the transformer. b.High-voltage conductors use high-conductivity, high-temperature-resistant enameled copper or aluminum round wires or corner wires, or copper or aluminum corner wires covered with high-temperature-resistant insulation materials to obtain the best interterm insulation and the lowest conductor loss. c.The design of the high-voltage coil is a multi-layer winding method, so that the external surge voltage is uniformly and linearly distributed to obtain the best impulse voltage resistance. d.The voltage lead-out position of the tap of the high-voltage coil should be designed in the middle section of the coil to avoid the high potential area at the coil end and properly handle to ensure the insulation strength of the lead-out wire. e.Low-voltage conductor adopts high-conductivity copper or aluminum sheet conductor, so that no unbalanced ampere turns are generated between the coils, the short-circuit axial mechanical force is minimized, the thermal conductivity is optimal, and the coils will not cause hot spots. f.The insulation layer of resin-coated electrical insulation paper for temperature rise of 65 ℃ is used between the winding layers to obtain the best voltage-resistant insulation ability, the best short-circuit resistance mechanical strength and short-term overload capacity. g.The setting of the coil current density must be able to fully meet the requirements of the short-circuit test to avoid overheating the coil temperature when an external short circuit occurs. Scope of application a.The transformer housing can withstand a pressure 25% higher than the maximum pressure when the oil degradation prevention device is running without permanent deformation. The upper cover is bolted or welded with appropriate manholes or hand holes. All joints and joints are tight and leak-free. A guide post is provided in the casing, which is convenient for the maintenance of the casing and prevents the core and windings from being displaced due to transportation or vibration. There is enough space between the core, windings and the bottom of the shell to allow the accumulation of residues. b.The transformer base has considerable mechanical strength so that the transformer can slide c.All padding surfaces have pad support to prevent the pad from sliding. d.The transformer is equipped with a radiator that is sufficient for self-cooling rating. The material selection, design and manufacturing and corrosion prevention of the heat sink are especially prudent in order to withstand the severe corrosion that may be encountered. e.According to the size of the transformer and the actual needs of the transformer, the manufacturer provides appropriate accessories, such as thermometers, oil level meters, etc. The types and specifications of the accessories must comply with the requirements of CNS 598. If customers have other requirements for accessories, it is agreed between the buyer and the seller. Cooling device a.The cooling device with self-cooling and forced-air cooling double-rated transformers is equipped with control equipment, cooling fans, motors, radiators and piping, etc. as required. The cooling fan is a horizontal axis fan, and its start and stop are automatically controlled by the temperature of the insulating oil via the temperature relay. Automatic and manual operation devices are located in the junction box on the transformer tank. b.The control and signal circuits of all cooling devices are connected to the terminal board in the transformer terminal box. c.The standard cooling fan motor provided by our company is single-phase 60Hz-220V, and its control power is single-phase 60Hz-220V. The power supply is provided by the customer, but it has been specified and listed in the owner's specification. When they are different, they shall be determined according to the required number of phases, voltage or after consultation between the two parties. No-voltage tap changer The transformer is equipped with a voltage-free tap switching device for manual operation outside the casing. The three-phase winding taps are operated simultaneously from the outside by a single handle. The operating device is provided with a position indicator so that the tap voltage position can be clearly and clearly marked. Casing characteristics Insulation distance: The minimum insulation distance in the air between the charging part of the bushing to the grounded metal part and the charging part of the bushing is specified as follows. Nameplate The marking content shall comply with the requirements of CNS 598, and its material shall be made of stainless steel. The following items are marked in Chinese (or English) on the nameplate: (1) Type (2) Phase sequence (3) Number of phases (4) Wiring diagram (5) Rated capacity (kVA) (6) Manufacturing number (7) Rated frequency (Hz) (8) Approximate weight (kg) (9) Rated voltage (10) Oil volume (L) (11) Tap voltage (12) Base Impact Insulation Level (BIL) (13) Temperature rise (14) Manufacturer name (15) Impedance voltage (16) Date Coating treatment The transformer shell must be rust-proof and applied with phosphate film or sandblasting rust-proof treatment. The inner layer is coated with durable oil-based rust-resistant insulating white paint, and the outer layer is weather-resistant rust-proof paint. The outermost color is Taiwan Paint Association Color Card # 06 or designated by the customer. Transformer oil The transformer must be filled with a normal amount of insulating oil. The quality of the insulating oil should meet the requirements of CNS 1326 and CNS 3070. Transformer test a.Voltage ratio test Add the rated voltage of the rated frequency to any coil, use a voltmeter to measure the voltage ratio of each connector, or use T.T.R (transformer turns ratio tester) to measure the voltage ratio of each connector. The error is within ± 0.5%. b.Polarity test Standard transformer comparison methods or other applicable methods of testing transformer polarity meet the requirements of Section 6. c.Induced voltage test For single-phase double-sleeve and three-phase transformer induced voltage tests, apply a test voltage twice the rated voltage to any coil. The test pressure time is: Test pressing time (second) = 120X rated frequency / test frequency d.Open and short test The open-circuit test and short-circuit test can be performed at normal temperature. When the measured no-load current, no-load loss, load loss, impedance voltage, voltage adjustment rate, and efficiency are converted to 75 ° C, they should meet the values in the characteristic table of this specification. e.Insulation compressive strength test Except that the single-phase single-sleeve side does not perform the 60Hz withstand voltage test, each coil of other various transformers is pressurized according to the value specified in the table without any abnormality. (As shown below) f.Temperature rise Winding: The highest winding temperature rise measured by the resistance method must not exceed 65 ° C. Insulating oil: The highest oil temperature rise measured by the thermometer method must not exceed 60 °C. g.Transformer noise Transformer design and manufacturing consider reducing the noise and vibration generated by the transformer. For its reference value, please refer to the characteristics table. h.Test items in the transformer plant: Before leaving the transformer, the following in-plant tests must be performed and a test report submitted. 1. Measurement of insulation resistance 2. Voltage ratio test 3. Polarity or phase sequence test 4. No-load (iron) damage test 5. Load (copper) loss test 6. No-load current test 7. Impedance test 8. Induced voltage test 9. Power frequency withstand voltage test Factory Certification ISO 9001, ISO 14001, OHSAS 18001, UL 1561, TAF17025 Laboratory Warranty One year warranty Delivery method Domestic - truck up to the ground / Foreign - CIF Product features a.Made of high magnetic permeability and low hysteresis amorphous alloy material, this greatly reduces iron loss. b.The coil structure is improved, and the surge protection design with sufficient shock wave resistance is provided. c.Anti-harmonic design ensures that system harmonic effects do not cause overheating or other damage. d.The efficiency is improved compared with the general type, achieving energy-saving and environmentally friendly functions. e.Received the Green Label of the Environmental Protection Agency of the Executive Yuan Ultra-power saving. f.customized products
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Industrial Transformers are required to increase or decrease the voltage for the ability of a facility to function. There are several types of them, such as Power Transformer, Amorphous Transformer, Oil Immersed Transformer, Cast Resin Transformer, Dry Type Transformer, Rectifier Transformer, etc. We provide High Efficiency Transformer for our esteemed clients to effectively save energy for them.

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