Handbook of Industrial Electricity
This device keeps the current practically constant regardless of the number of units connected in the loop. Most street-lighting systems are equipped with time switches which automatically turn the lights on and off according to the changing ... Alternating-current three-phase three-wire multiple lighting system. or they may be connected to a bank of transformers in a polyphase system as shown in Fig. 20.
| Title | : | Handbook of Industrial Electricity |
| Author | : | Max Kushlan |
| Publisher | : | - 1931 |
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