. Development and electrical distribution of water power . 70. (Oil Chamber Lowered.) parts in three separate brick chambers. This switch is operatedelectrically by heavy magnets which may be partly seen, theirplungers connecting to the operating-chain links attached to themain lever arm. Ordinary knife switches are satisfactory up to 600 volts; andwhere the energy transmitted over each switch does not exceed , these may be used as main dynamo switches with low-ten-sion generators, the voltage being raised by step-up transformers. SWITCHING AND CONTROLLING APPARATUS J4
. Development and electrical distribution of water power . 70. (Oil Chamber Lowered.) parts in three separate brick chambers. This switch is operatedelectrically by heavy magnets which may be partly seen, theirplungers connecting to the operating-chain links attached to themain lever arm. Ordinary knife switches are satisfactory up to 600 volts; andwhere the energy transmitted over each switch does not exceed , these may be used as main dynamo switches with low-ten-sion generators, the voltage being raised by step-up transformers. SWITCHING AND CONTROLLING APPARATUS J43 These also are used for the exciter dynamos and the generatorfields. The exciter current is usually of low voltage, either 125 or 250volts, and the exciter switchboard is built on the same lines and
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