From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Data table for transformer testing, showing tapping positions, total turns, and equivalent voltage.
| Identifier | ExFiles\Box 32\4\ Scan054 | |
| Date | 27th September 1924 | |
| 27.9.24. RE TESTING TRANSFORMER. Condition No. Position of tappings (Expressed in No. of turns). Total No. of turns. Equivalent nominal Voltage. 50. 90,15. 105 84 51. 90,15,15. 120 96 52. 40,90. 130 104 53. 40,90,15. 145 116 54. 90,15,15,15,15. 150 120 55. 10,20,40,90. 160 128 56. 2,5,10,20,40,90 167 133.6 57. 1,2,5,10,20,40,90. 168 134.4 58. 5,10,20,40,90,15. 180 144 59. 2,5,10,20,40,90,15. 182 145.6 60. 1,2,5,10,20,40,90,15. 183 146.4 61. 2,1,2,5,10,20,40,90,15. 185 148 62. 10,20,40,90,15,15. 190 152 63. 90,15,15,15,15,45. 195 156 64. 2,5,10,20,40,90,15,15. 197 157.6 65. 1,2,5,10,20,40,90,15,15. 198 158.4 66. 2,1,2,5,10,20,40,90,15,15. 200 160 67. 10,20,40,90,15,15,15. 205 164 68. 90,15,15,15,15,45,15. 210 168 69. 2,5,10,20,40,90,15,15,15. 212 169.6 70. 1,2,5,10,20,40,90,15,15,15. 213 170.4 71. 2,1,2,5,10,20,40,90,15,15,15. 215 172 72. 10,20,40,90,15,15,15,15. 220 176 73. 5,10,20,40,90,15,15,15,15. 225 180 74. 2,5,10,20,40,90,15,15,15,15. 227 181.6 75. 1,2,5,10,20,40,90,15,15,15,15. 228 182.4 76. 2,1,2,5,10,20,40,90,15,15,15,15. 230 184 77. 40,90,15,15,15,15,45. 235 188 Contd. | ||