Basic Info.
Frequency Characteristics
High Frequency
Reference Standards
GB1094.1-2013, GB1094.2-2013, GB1094.3-2003, GB109
Product Description
Applicable Scope
This kind of the three-phase oil-immersed power transformer designed and manufactured by Guangzhou Yibian Power Source Equipment Co., Ltd, with capacity equal to or less than 12500kVA and voltage equal to or below 35kV.
And about this series of Oil-Immersed Power Transformer are used in the rated voltage is 6~35kV, the three-phase AC is 50 Hz power supply system. Instead of pipe-type and panel-type radiator, the oil tank of this Oil-Immersed power transformer uses corrugated type radiator, it has characteristics of good heat dispersing of transformer. The active part of transformer, transformer oil should be insulated with air, in order to prevent the oil from ageing, so it requires little maintenance.
It can be widely used in industry zones, boatyards, oil field, public roads, especially for cement plants, construction site, mines and such severe environment.
Inspection and AcceptanceWhen customer receives the transformer, please firstly check its nameplate to ensure the product type and specs are conforming to the ordering requirements. Then by referring to the document list, check whether all technical documents and auxiliary accessories are complete.
Check whether there is oil leakage or seepage.Check whether the product or accessories are damaged.Check the whether the vulnerable parts such as bushing, temperature indicator, de-hydrating breather, gas relay and etc. are damaged. Transformer with capacity below 500kVA has no gas relay. Transformer with capacity equal to or above 800kVA has temperature indicator.
Active-part Lifting and Inspection
For the S13 series oil transformer designed and produced by our company, with capacity equal to or lower than 1600kVA and voltage as 10kV, if the transportation conditions are good, it is not needed to lift the active part for inspection. What customer needs to do is to assemble the dismantled sub-assemblies and carry out on-site commission test. If the test results are qualified, the transformer could be energized.For other transformers with capacity equal to or lower than 630kVA, if the transportation conditions are good and there is no abnormal phenomenon on the fastening conditions, there is no need to do the active-part inspection. Transformer could be energized if the on-site commission test is passed.Active-part inspection conditions and requirementsBe sure the inspection tools are clean, not to pollute the transformer.The temperature of the active part should not be less than that of the ambient. Otherwise, vacuum oil filtering machine is to be used to heat the oil, thus to heat the oil by 5ºC higher than ambient temperature.The time for active part staying outside in air should be nor more than the following limits, commencing from oil draining until the foil filling finished.:
relative humidity ≤65%: 16 hours
relative humidity ≤75%: 12 hoursActive part lifting and inspection are normally carried out in indoor conditions. The environment should be clean and dry, to avoid the active part is polluted and gets humidity.
After the active part is lifted, please check the following items:Check whether there is loose components and other foreign matters within the tank.Measure the insulation between HV and LV windings, and also the insulation between the HV&LV winding to earth.Check whether there is multiple earthing points in the cores. If the core has multiple earthing points, this multiple earthing fault should be removed. Then, disconnect the earthing piece between the core and clamp, use a 500V megger meter to measure the insulation resistance of core to earth. The measured value should be above 200MΩ. After the insulation resistance measurement is finished, the earthing connection piece should be re-connected.Check whether there is loose part in windings, leads, support blocks and pressing boards. And check whether there is displacement and damage in the active part.Check the bolts to ensure they are firmly fastened.
After the active-part inspection, the active part should be put back into the tank. When assembling the active part, be sure not to bump the tank cover and also be sure to avoid suspension in the tank. Then, evenly fasten the tank cover bolts, to apply even forces on the sealing rubber and enable even pressing force on the sealing rubber. Finally, fill in the oil into the tank.If any of the following happens, the transformer should be dried.There is excessive water content in the oil, or the active part and tank are obviously affected with damp.The active part was exposed in air for time longer than what is stipulated in section 3.2.The calculated insulation resistance at the same temperature of the HV and LV windings are lower than 70% of the values measured at ex-work test.
Address:
Qianfeng North Road No. 9, Shiji Town, Panyu District, Guangzhou, Guangdong, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics
Company Introduction:
Guangzhou Yibian′s product line covers such high quality electrical equipment as resin insulated dry-type transformer, High-voltage/low-voltage prefabricated substation, pad-mounted transformer, oil-immersed power transformer, High and low voltage switchgear and control equipment, etc...The company has passed ISO9001, ISO14001, OHSAS18001 quality, environmental, occupational health and safety management system certification. Products comply with national and international standards. They are widely running in various power grids and networks.
Our products are widely used in various power systems, real estate enterprises, industrial and mining enterprises and municipal facilities, tunnel Bridges, airports, road supply and distribution.
High quality and reasonable price. We stick to the principle of "quality first, service first, continuous improvement and innovation to meet the customers" for the management and "zero defect, zero complaints" as the quality objective. To perfect our service, we provide the products with good quality at the reasonable price; Endeavoring to do still better and serving customer wholeheartedly and contributing to the society.