1 Overview 　　35~500kV oil-immersed power transformer is used for agriculture and industry transmission andtransformation system with frequency of 50Hz, abiding to IEC60076, GB1094.1.2-1996 and GB1094. 3.5-2003. 　　2 Service and Installation Conditions 　　Elevation: ≤1000m 　　Ambient temperature: -25~+40/monthly average max -+30/annual average 　　max:+20 　　Power source: Approximately sine-wave, and three phases are almost symmetrical. 　　Installation site: Indoor or outdoor, besides the environment should be kept from obvious pollution. 　　Remark: Transformers under special conditions should be informed while ordering. 1. switchgear ( 72.5 KV up to 1100 KV ) 2.transformers ( up to 1000 KV) 3. switch cubicles ( up to 40.5 KV) 4. automatic control ( Power Automation Solutions for Global customers) 5. cables ( Overhead Lines, XLPE cables, cables with plastic cover and special cables) We have experience in organizing different types of project from public and private parties. Our entire projects were met with a great satisfaction among our customers. The positive feedback is something that we can be proud of. Can you please kindly arrange us the time to meet with you for talk business corporation when your free time? Please kindly check our website for your reference, http://www.tk-electric.com/English/index.asp