3370 High Voltage Standard Gas Capacitors0 pages

NK SERIES, 3370
Standard Capacitors

The SF6 insulated standard capacitor is used
together with a C and tan delta measuring bridge (e.g.
2840). As a comparison standard for exact
measurements of the capacitance and tan of HV
equipment like cables, transformers, bushings,
capacitors, etc. The capacitor is provided with a top
electrode which allows partial discharge free
interconnections to the other elements of the HV
circuit. The SF6 insulated standard capacitor is
designed for indoor service and is mobile designed.
The standard capacitors of the series NK or 3370 are
used for:

SPECIAL FEATURES
For very high voltages a grad with discrete capacitor
elements achieves a linear field distribution. These results
in higher voltage withstand capability even at humidity
levels up to 95 % without condensation. High temperature
and voltage coefficient stability is granted.

Exact measurements of the capacitance and tan
delta
Exact measurements of AC voltages (AC divider) in
the industrial frequency range (with add. internal
electrode or add. secondary part).
The capacitor is built as steel pressure vessel, with
bushing for voltages up to 30 kV included. Above this
voltage the measuring capacitance Cs is formed by the
metallic pressure tank and the corresponding internal
concentric electrode.
The electrodes are insulated from each other with SF6
gas. All capacitors are fitted with a pressure indicator
and filling valve. Surge arrestors protect the measuring
output from transients.

Standard capacitor 100 kV

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