Audited Supplier
Qinghao is a leading professional power transmission and distribution manufacturer in electrical fields for over 20 years with a registered capital of USD8,000,000 (Eight Million Dollars). Except for ISO9001, ISO14001, ISO45001 certificates, we are also TUV audited suppliers with AAA enterprise and AAA products honors. All products comply with GB and IEC related standards, which mainly include oil immersed distribution transformer, dry-type transformer, amorphous alloy transformers, combined transformer substations, cable branch box, high low voltage switchgear distribution equipment.
Oil distribution transformer includes hermetically sealed, amorphous alloy, conservator type and on-load tap changer type, which is usually pole mounted or installed in distribution station for daily lighting and factory power whose LV output up to 0.4kV. Our distribution transformer rating is up to 2500kVA, and primary voltage up to 35kV. The corrugated tanks as thermal expansion and contraction component enable the transformer oil completely isolated with the atmosphere. Oil distribution transformer with primary voltage range of 6,10,10.5,11,20,22,24,33, 35,38.5kV can be manufactured according to customer requirements.
High efficiency, low loss, low noise, strong load resistance and long service life.
Main Characteristics:
1. Designed by patented technology and software with premium performance.
2. Core is made of high quality cold-rolled grain-oriented silicon steel sheet which produced in step-lap technology.
3. Winding is using high strength enameled wire or paper-insulated wire or copper belt, which offers uniform distribution of ampere-turns, reasonable insulation structure with high ability to withstand short-circuit.
4. Oil tank is corrugated type with high corrosion resistance. Tank surface pre-treatment liquid and coating powder adopts international top brands. The tank is degreasing, pickling, phosphorated, electrophoresis by automatic production lines, then power spray coating and heat-solidify.
5. The active part applies core free-hanging structure. The gasket is made of high-quality acrylate rubber which can inhibit ageing caused by sun and heat.
Advantages:
1. Low loss, low noise, low partial discharge, high reliability.
2. Safety with elegant appearance.
3. Convenient installation and simple maintenance.
4. Compact with small occupied area.
Applications
1. Building Infrastructure and Industrial: Airports, hospitals, factories, shopping malls, hotels, commercial and residential towers.
2. Utility: Generation, transmission, distribution substations, water and waste water treatment plants.
3. Oil and Gas: Oil and gas plants, petrochemical plants and refineries.
Service environment:
1. Ambient temperature: Maximum +40ºC, Minimum -40ºC
2. Altitude: less than 1000 meters.
3. Seismic level: less than 3m/s2 at horizontal direction and less than 1.5m/s2 at vertical direction.
4. Installation environment: No obvious and heavy pollution, no explosive and corrosive gas and dust, with good air ventilation and no severe vibration and shock.
(Note: If the application environment is different from the above standard conditions, please contact for customized designs.)
Please check below quick links for other product types.
| Control Transformer | Oil Immersed Transformer | Dry Type Transformer |
| Substation Transformer | Switchgear | Distribution Cabinet |
The rated voltage 10kv 20kv 33kv can be customized as customers' requirements. For instant communication, please click here.
| High Voltage:20(15,20,22)KV Connection Symbol:D,yn11 or Y,yn0 Rated Frequency:50Hz/60Hz Low Voltage:0.4(0.415,0.433)KV Tapping Range of HV:±2x2.5% Insulation Level:LI125 AC55/AC5 | ||||||||||||||||
| Rated power (KVA) | Short-Circuit Impedance(%) | S18 (W) | S13 (W) | S11 (W) | No-Load Curre (%) | Sound pressure dB(A) | Weight (kg) | Overall Dimension(mm) | ||||||||
| No-Load Loss | On-Load Loss75ºC | No-Load Loss | On-Load Loss75ºC | No-Load Loss | On-Load Loss75ºC | L | W | H | ||||||||
| Dyn11 | Yyn0 | Dyn11 | Yyn0 | Dyn11 | Yyn0 | |||||||||||
| 30 | 5.5 | 70 | 550 | 530 | 80 | 690 | 660 | 100 | 690 | 660 | 2.1 | 52 | 500 | 700 | 650 | 900 |
| 50 | 95 | 810 | 770 | 104 | 1010 | 960 | 130 | 1010 | 960 | 2.0 | 52 | 600 | 730 | 690 | 950 | |
| 63 | 110 | 960 | 920 | 120 | 1200 | 1150 | 150 | 1200 | 1150 | 1.9 | 52 | 650 | 750 | 700 | 980 | |
| 80 | 130 | 1155 | 1100 | 144 | 1440 | 1370 | 180 | 1440 | 1370 | 1.8 | 54 | 700 | 770 | 720 | 1000 | |
| 100 | 145 | 1385 | 1320 | 160 | 1730 | 1650 | 200 | 1730 | 1650 | 1.6 | 54 | 750 | 810 | 760 | 1050 | |
| 125 | 170 | 1660 | 1585 | 192 | 2080 | 1980 | 240 | 2080 | 1980 | 1.5 | 56 | 820 | 860 | 780 | 1100 | |
| 160 | 210 | 2035 | 1940 | 232 | 2540 | 2420 | 290 | 2540 | 2420 | 1.4 | 56 | 860 | 910 | 810 | 1140 | |
| 200 | 245 | 2400 | 2290 | 272 | 3000 | 2860 | 340 | 3000 | 2860 | 1.3 | 58 | 910 | 1220 | 820 | 1150 | |
| 250 | 290 | 2820 | 2680 | 320 | 3520 | 3350 | 400 | 3520 | 3350 | 1.2 | 58 | 950 | 1270 | 860 | 1170 | |
| 315 | 345 | 3370 | 3210 | 384 | 4210 | 4010 | 480 | 4210 | 4010 | 1.1 | 60 | 1280 | 1300 | 900 | 1200 | |
| 400 | 410 | 3975 | 3785 | 456 | 4970 | 4730 | 570 | 4970 | 4730 | 1.0 | 60 | 1350 | 1490 | 990 | 1240 | |
| 500 | 490 | 4755 | 4530 | 544 | 5940 | 5660 | 680 | 5940 | 5660 | 1.0 | 62 | 1560 | 1570 | 1040 | 1250 | |
| 630 | 6.0 | 580 | 5460 | 648 | 6820 | 810 | 6820 | 0.9 | 62 | 1840 | 1600 | 1090 | 1260 | |||
| 800 | 705 | 6600 | 784 | 8250 | 980 | 8250 | 0.8 | 64 | 2180 | 1710 | 1200 | 1320 | ||||
| 1000 | 825 | 9060 | 920 | 11330 | 1150 | 11330 | 0.7 | 64 | 2540 | 1820 | 1270 | 1430 | ||||
| 1250 | 990 | 10560 | 1100 | 13200 | 1380 | 13200 | 0.7 | 67 | 3120 | 1880 | 1290 | 1630 | ||||
| 1600 | 1195 | 12760 | 1330 | 15950 | 1660 | 15950 | 0.6 | 67 | 3790 | 1950 | 1310 | 1650 | ||||
| 2000 | 1405 | 15310 | 1560 | 19140 | 1950 | 19140 | 0.6 | 67 | 4050 | 2050 | 1340 | 1900 | ||||
| 2500 | 1685 | 17780 | 1870 | 22220 | 2340 | 22220 | 0.5 | 69 | 5500 | 2200 | 1450 | 2000 | ||||
| Note: The above parameters are only for designing and selecting reference, and the final parameters are subject to the actual product. | ||||||||||||||||
- Core: Typically made of laminated steel sheets.
- Windings: Primary Winding and Secondary Winding.
- Insulation: To prevent electrical conductivity between windings and the core, and turns of the windings.
- Tank: To house magnetic core and windings.
- Cooling System: Natural air cooling, forced air cooling, oil cooling with radiators, oil cooling with fans or heat exchangers.
- Bushing: Maintain electrical isolation.
- Tap Changer: Maintain voltage stability despite fluctuations in load or input voltage.
- Breather: Regulate the intake of air when the oil level expands and contracts due to temperature changes for oil transformer.
- Conservator: Also called expansion tank to ensure the oil level remains constant in the main tank.
Except for ISO9001, ISO14001, ISO45001 certificates, we are also TUV audited suppliers with AAA enterprise and AAA products honors. All products comply with GB and IEC related standards, which mainly include oil immersed distribution transformer, dry-type transformer, amorphous alloy transformers, combined transformer substations, circuit breaker, cable branch box, high low voltage switchgear cabinet distribution equipment.
With the concept of "World-class transformers, smart solutions", Qinghao Transformer is devoting to provide high-quality power for customers.
Let us cooperate with a brighter future!
A: We are the original factory with approved export license.
Q: What's your warranty terms?
A: We offer 24 months warranty time.
Q: How long is the production time?
A: 25 to 45 days or depending on order requirements.
Q: What should provide to make custom transformer?
A: Technical drawing and specification documents are the best, or you can list key parameters for designing.
Q: How can I trust you?
A: We are TUV aduited supplier with many patent certificates, type test reports, CQC, CE, KEMA, ISO certificates. We can provide on site services for many areas like South America, Indonesia, etc.
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