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 MIL-HDBK-419A
EQUIPMENT
ENTRANCE
(DC TO 3 MHZ)
DEMARC J-BOX AT FACILITY
ENTRANCE
EXTERNAL
TWINAXIAL
LINE
Figure 1-45. Transient Suppression for Twinaxial Lines (DC To 3 MHz)
Functional characteristics. For effective transient suppression, the suppression components must
d.
These characteristics are defined in
have certain minimum operating or functional characteristics.
paragraphs 1.3.3.7.8d(l) and (2) for high-and low-energy transient suppressors, respectively.
(1)
High-energy transient suppression characteristics.
(a) Reverse standoff voltage. Reverse standoff voltage for spark gap type suppressors
should be between 200 and 300 percent of the nominal operating line voltage. For MOV, ZNR, and SAS type
suppressors, the reverse standoff voltage should be 175 25 percent of the nominal line voltage.
(b) Leakage current.
Leakage current to ground should not exceed 100 microamperes at
reverse standoff voltage.
(c) Turn-on voltage.
Turn-on voltage should not exceed 125 percent of reverse standoff
voltage.
1-96
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