The three largest sizes are similar
in construction tot he Type 1401. The smaller capacitance units
are made up of two plates, with a grounded plate between them,
an aperture in the grounded plate determines the magnitude of
the direct capacitance. Di-electric losses are not detectable;
there is no solid dielectric in the direct-capacitance field.
All have shielded terminals, both of which are insulated from
the case.
Figure
1
Change (percent) in effective direct capacitance,
with frequency, produced by residual inductance.
Figure 2
Equivalent
circuit showing direct capacitance, Cd, and typical values of
residual inductance, L, and terminal capacitances, Ca and Cb. |
;)
