12 MVA step down transformer |
| 01-11 15:06:32 来源： 作者： |
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12 MVA step down transformer This is an inquiry message about 12 MVA step down transformer in the 108th China Canton Fair. (这是一条买家关于"12 MVA step down transformer"的询盘信息，来自第108届中国广交会。)Inquiry Message (询盘信息) 12 MVA step down transformer Technical Specification for 12 MVA Transformer S No. Description Quantity 1. Three phase oil immersed 01 no. Step down Transformer The purpose will be the I/P for another step down transformer which will drive a 12 pulse converter and 6 pulse converter DC Drive motor combination for steel plant. ? Primary voltage 13.8 kv ? Secondary voltage 3.3 kv ? Rated frequency 60 Hz ? Type of cooling forced air ? No load losses 10 kw ? Load losses 75 kw ? Control voltage 110 volts ? Tap changer off load manual ? Flux density less than 1.7 tesla ? Installation outdoor 1. General conditions Elevation coastal area Temperature 50 deg centigrade maximum 15 deg centigrade minimum Humidity 96 % maximum The transformer will be oil immersed type and should comply with the power transformer specifications. All the equipments should comply with the Saudi electricity supply, or the latest standard and codes. The transformers will be kept in outdoor and humid climate. The rating of transformers will be done at ambient temp. Unless specified. In the design dusty atmosphere should be considered. All safeties should be given priority, considering the access to the equipment for maintenance and routine checkups. The control circuit voltage shall be of 110 volts dc supply, for all auxiliary relays, contactor starters and indications. The design should be so as to simplify the access to the equipment for inspection, testing, maintenance, clearing and general repairs at site. 2. Design features. Each transformer shall be suitable for operating at the full rated power on all tappings without exceeding the following temp rise. Windings 55 degrees centigrade Oil 50 degree centigrade The transformer design should be such that it should withstand the thermal and mechanical effects of any short circuits between phases and the earth at the windings when full voltage is applied across the other windings. The core, structure and tank design, shall be such that The operation shall be with minimum noise and vibrations, and no damage should be in transit or shipments. The contacts shall be design for carrying the rated current without any excessive heating, and minimum losses. The mechanism should be of brass, stainless steel to eliminate rusting, sticking or corrosion. 3. Core The frame work and the structure shall be robust enough to withstand the shocks during transport installation or operation. The core shall be clamped and care shall be taken that the clamping pressure is uniform throughout the core to avoid noise and vibrations. The frame and core bolts shall be insulated to avoid eddy current losses. The magnetic circuit shall be built of high quality low loss, non ageing, cold rolled, grain oriented, silicon steel laminations having excellent magnetic properties and suitable core material. All laminations shall be insulated from each other with rust inhibiting properties, and shou" STP-3D Contact Info (联系信息) I would like a quote for Qty. (4) Impact Recorder #STP-3D. Thank you, Emily Ortiz Emily Ortiz <br /> 90638 <br /> <br /> Company: General Switchgear, Inc.<br /> E-mail: eortiz@generalswitchgear.com |
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