Question

Deta-Way transforner's namwplates are shown below:

LOW VOLTAGE CONNECTIONS RAISE CONNECTS O TO R2 CONNECTS O TO R1 AMPS MAX VOLTS 9375 POS VOLTS AMPS| POS KVA P1 TO IP4 TO 55 C 14399 375.9216-RN 14317 378.06 15.R 14235 380.2414.RM 14154 382.4413-R 14072 384.6612.R 3990 386.9111-RL 13908 989.18 10-R 13826591.49 9-R 13744 993.82 &R M 12926 2845 3-L 2681 12599 12517 6 7-L 8-L 9-L 1243 413.5 396.18 7-R 13581 998 566.R 12108 12026 00.985.R 13417 403.42 4.R 13335 405.90 3RG 13172 410.94 1-R 13090 413.52N NOTE: ON POSITION N AND ALL EVEN POSITIONS SWITCHES P1.P2.P3,P4 0 0 ARE CLOSED ON ALL ODD POSITIONS SWITCHES P2,P3 ARE CLOSED HIGH VOLTAGE CONNECTION SELF-o FORCED 7500/8400KVA CONTINUOUS 9375/10500 KVA CONTINUOUS 55/65 C RISE BY RESISTANCE HIGH VOLTAGE 67000 LOW VOLTAGE 1 30991/7560 PERCENT IMPEDAN SERIAL NO. P0DIO INES ON 1,8 AND 15 AMPS DIAL POSITION 65/80 C VOLTS 9375 1 4-5 11-12 18-19 2 3-5 11-13 17-19 3 3--6 10-13 0350 AT 7500 KVA 17-20 ST. LOUJS, MO. U.S.A

The de-energized tap is set at position "2" and the load tap changer is at "5-R". If the line-t0-line voltage applied to the high-voltage bushings is 71.5 KV, find the no-load voltage (line-to-line) across the low-voltage bushings.

Answer 1