Inquiry (采购产品): Transformer Dear Sir/Madam Would you please provide me with a formal quote for the following transformer with the criteria as followed: Standards: IEC 76 Nominal Rating: 30000 KVA No of Phase: Three phase unit Frequency: 50 Hertz No: of Winding: 3 Stabilizing Winding: Yes Normal ratio of transformation HV/LV: 70/20 KV Type of cooling: ONAN/ONAF Ambient Temp Max: 40 C Current ONAN / ONAF 70KV: 148.46 / 247.44 A Current ONAN / ONAF 20KV: 519.62 / 866.03 A Continuous ONAN rating of transformer: 18 MVA Continuous ONAF rating transformer: 30 MVA B.I.L. : 325 / 125 KV Temp rise winding: 58 C Connection: star - star Vector group: Y N y n 0 (d 11) Impedance voltage: 12.5% Material Winding: copper Tab Changer type: On Load Control voltage: 110 V.DC Supply motor cooling & OLTC: 380V AC External Cooling medium: Air Winding hot spot temp when loaded on emergency overload not exceeding: 140 C Max hot spot temp when loaded in accordance with IEC 254: 98 C Max Temp rise at raised output and ambient temp 30C winding: 58 C Oil: 53 C Rated power frequency short duration withstand voltage HV/LV: 140/150 KV Highest voltage for equipment: 72.5/24 KV Short circuit KA available 70 KV terminals: 40KA 20 KV terminals: 12.5 KA No of taps: 18 No of steps: 17 Type of control: On Load/Local/Remote/Electrical/Hand operated Whether automatic control required: Yes Whether remote control panel required: Yes Whether provision for suspervisory control required: Yes Termination: 70KV terminals: Bushing 20KV terminal: Bushing Neutral: Bushing Minimum Creepage distance bushing (IEC 815 - 1986), (Phase to earth voltage) 72.5KV Terminal: 31 mmKV 24 KV terminals: 31 mmKV Accomodation for neutral CT in Bushing ion transformer tank: Yes Min Efficiency continuous nominal power at 75 C 50HZ Power factor 1.0: 99.57% Power factor 0.8: 99.47% Please inclde in your formal quote with the following description: 1. Delivery time 2. Price 3. Weight: (for shipping and handling cost) 4. Condition. ( We preferred Brand new equipment) I shall look forwards reading your quote. Sincerely yours Roy Poan Purchasing Manager Macro Petro Inc Houston TX rpoan@hotmail.com **** Hidden Message ***** Roy Poan TX 77077 USA Company: Macro Petro Inc E-mail: rpoan@hotmail.com **** Hidden Message ***** rpoan@hotmail.com
