SME mining engineering handbook
Usually, the motor voltage is stepped down to 480 v ac for smaller horsepower drives, or 4, 160/2, 300 v ac for larger ... He does this by manually moving his hoist master switch (controller) which, through appropriate relay logic, will closeanbsp;...
| Title | : | SME mining engineering handbook |
| Author | : | Arthur B. Cummins, Ivan A. Given, Society of Mining Engineers of AIME. |
| Publisher | : | - 1973 |
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