TM 5-815-1/AFR 19-6
b. High voltage transformer. The standard iron core
rectifiers is used for lower rated current sets, typically
transformer is the only instrument generally used to
500 miliamperes (mA).
d. Voltage and amperage controls. Controls are
step-up the input voltage. The only care that need be
taken is that the transformer is of superior quality and
needed to insure that the precipitator is supplied with
able to put out the quantity of voltage required by the
the maximum amount of voltage or power input, and
precipitator. Transformers are designed to withstand
to control the effects of sparking. The most modern
high ambient temperatures and electrical variations
method of accomplishing these aims is through the use
induced by sparking. For high temperature operation,
of silicon controlled rectifiers (SCR). Other modern
the most common transformer cooling method is liquid
control devices are saturable reactors and thyristors
immersion.
(four element, solid state devices). Voltage control can
c. High voltage rectifier. Silicon rectifiers are the
also be accomplished by tapped series dropping
latest advance in rectifying circuitry. They are solid
resistors, series rheostats, tapped transformer prim-
state devices which have a few of the disadvantages of
aries, and variable inductances.
e. Auxiliary control equipment. As with any control
the other types of rectifiers. An assembly of silicon
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