Recently, the news of the mainstream iPad launch continued to burst. In the morning, Bubble Network just reported that the iPad was delivered to China Unicom's warehouse (see “iPad Surprise Unicom's warehouse†“surprise†price with Suning salesâ€), and from relevant sources. Learned that iPad mainstream goods will be "surprise" price sales, the actual sales price will be much lower than previously estimated media prices, but the person is not willing to disclose the iPad specific sales prices. Last night, CUGSM (China Unicom brother) Following the microblogging exposure licensed iPhone4-related events to speak again, said licensed iPad wifi 16G price of 3498 yuan. The 3G version of the price will be about 1,000 yuan more than the same capacity version, users will purchase a 3G version of the iPad will receive a free Unicom Micro-SIM card, the use of tariffs according to the current Unicom Internet access package fees. China Unicom’s younger brother said that the relatively favorable price of licensed iPad is a normal phenomenon. Apple’s introduction of the iPad on the Chinese mainland page has always been “miraculous and revolutionary products with incredible prices†as its slogan. Jobs also expressed at the launch of the iPad that he would like to combine the perfect product with a low price and devote it to more consumers. At present, China Unicom's younger brother on the iPad microblogging has been deleted on their own, which is closely related to the previous user's disclosure of information after the news is very close. Another media report stated that Digital China has obtained iPad distribution rights. By then, it will be possible to present the four iPad sales scenes of China Unicom, Suning Appliance, Digital China, and Apple Store. The oil immersed transformer is composed of components and accessories such as primary winding, secondary winding, iron core, oil tank, base, high and low voltage bushing, radiator (or cooler), oil purifier, oil storage tank, gas relay, Tap Changer , thermometer, oil level gauge, Moisture Absorber, etc. Transformer Accessories,Transformer Breather,Pointer Oil Level Gauge,Electric Contact Pressure Relief Valve Henan New Electric Power Co.,Ltd. , https://www.newelectricpower.com
The following is an introduction to some accessories:
1. Gas relay is an important safety protection device on Oil Immersed Transformers. It is installed on the connecting pipe between the transformer tank cover and the oil storage tank. Under the action of gas or oil flow generated by internal faults in the transformer, it connects the signal or trips the circuit, causing relevant devices to issue an alarm signal or cut off the transformer from the power grid, achieving the function of protecting the transformer.
2. Oil level gauge
The oil level gauge is mainly suitable for oil immersed fully sealed transformers, installed on the upper part of the transformer oil tank cover to display the oil level inside the oil tank. When a blue mark appears in the upper window of the oil level gauge, it indicates that the oil level is normal and above the tank cover; When a red mark appears, it indicates an abnormal oil level. The oil level is below the tank cover and needs to be replenished appropriately.
4. Transformer butterfly valve
The butterfly valve is installed on an oil immersed transformer and is a control valve, which is a specialized valve used for oil immersed transformers. When the transformer malfunctions, is transported or repaired, close the valve, and open it during normal operation. Butterfly Valves have the characteristics of small rotational torque, oil resistance, high temperature resistance, and long-term use without leakage
5. Off excitation tap changer
The function of the tap changer is to adjust the number of turns of the high-voltage winding of the transformer to change within the range of+5% to -15% of the rated value in the event of a power outage, thereby changing the voltage on the low-voltage side and fully adapting to the voltage needs of users.
6. Moisture Absorber
Moisture absorbers are also known as silicone cans or slow flow moisture absorbers. On transformers, moisture absorbers are usually connected to the oil conservator, which contains white or blue silicone adsorbents inside to remove and dry debris and moisture from the air entering the transformer (or transformer) oil conservator due to changes in transformer oil temperature, ensuring the insulation strength of the transformer oil and normal operation of the transformer.