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IEC:60076 (Part 11) Cl.no.19 1-500kV AC Zero sequence impedance for 3Ø transformer IS: 2026 (Part-1) Cl.no.10.1.3.d. IEC: 60076 (Part 1) Cl.no.11.1.4.f 1 kVA to 2.5 MVA, HV-1 V to 33 kV LV-1 V to 3.3kV. Vacuum / Air Pressure (Type test) IS:1180(Part 1) Cl.no.21.3.d. CBIP publication no.: 317 -1 to 2 bar ................
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