International Library of Technology · Scranton, International Textbook Co. · leaf 432
Mare themain series coils and S, S the compensating coils that con-stitute the shunt to M, M and take an increasing amount ofcurrent from M, M as these series coils become heated.The result is, that although the pull of 5, 5 decreases as the 64 ELECTRIC LIGHTING. 18 lamp warms up, the balance… … Fig. 36. thus decreasing its resistance, when the lamp becomes hot.Fig. 36 shows the connections of the Gilbert enclosed-arclamp for constant-current circuits. This is a differentiallamp using a thermostat to cut out part of the shunt coil ELECTRIC LIGHTING. 65 when the lamp becomes hot. The…
Electrical engineering
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