| 摘要 |
PURPOSE:To reduce the number of cables for connecting neutral points or of cable heads even when neutral point currents are high and form cable connection boxes compact, by connecting the neutral point of a winding in each single phase transformer by a cable resulting in a three-phase bank constitution, regarding a transformer which is constituted in three-phase bank of three single- phase transformers. CONSTITUTION:Neutral point leads 51, 52, 53 of windings in each phase transformer 1, 2, 3 are led into cable connection boxes 61, 62, 63 in each phase transformer by conductor lead-out devices 8 and further branched into two, two and three respectively in insulating media in the cable connection boxes 61, 62, 63 being led out to the outside by the cable heads 71A, 71B, 72A, 72B and 73A, 73B, 73C. Then, the cable heads 71A, 71B in a U phase are respectively connected to the cable heads 73B, 72A in a W phase and a V phase by cables 93, 91, and the cable head 72B in the V phase and the cable head 73A in the W phase are connected by the cable 92. The cable head 73C in the W phase is used when grounding neutral points by the cable 90, etc. |
