HV Connectors
Reentrant connectors allow standard coaxial cable to be used as high voltage charging lines, transmission lines between a pulsed power source and load, or Pulse Forming Lines (PFL's). These connectors consist of a two-component plug assembly and mating jack. The maximum continuous or pulsed operating conditions are determined by the cable itself. Please consult the cable manufacturer for detailed specifications and recommendations. The outer insulation and braided shield are stripped leaving a length of center conductor that passes completely through the connector. The prepared end of the cable is inserted through the threaded component of the plug and the sleeve is then bonded to a short length of exposed braid using electrically conductive Ag-epoxy. Therefore the shield of the cable must always be at ground potential. Instructions for cable preparation and all parts required for installation are provided with each connector.
The HN-58 connector is designed for panel mounting (0.060-0.188 inch thickness) [1.5-4.8 mm thickness] and power supply applications. The hv terminal within the insulating tube consists of a Staubli socket. A companion pin plug is included with the kit thereby insuring secure contact with the center conductor of the user's coaxial cable. A 60-cm length of hv wire then connects to the user's circuit. These connectors are designed for use in standard atmospheric conditions.
HN-68 and HN-70 connectors are designed for capacitor charging or low-current pulse transmission lines. HN-78, -88, -89, and -98 connectors are designed for larger-diameter coaxial cables and are therefore capable of higher voltage and higher pulse current operation. The center conductor is attached to the user's apparatus using Staubli plug-socket sets. Our connectors are solid brass with Miralloy plating. Staubli components are silver plated. The plug and jack both employ O-ring seals so these connectors may be used with pressurized systems (e.g., Marx generators) or experimental chambers at slight vacuum. Note that some coaxial cables require additional preparation for complete sealing. These connectors are not rated for high vacuum and baking.
IMPORTANT NOTE: HN-series connectors ARE NOT impedance preserving!
Additional technical information and an installation guide may be obtained by clicking on the
model number in the following table.
| Model | Typical Applications |
Cable Types |
Max. DC Voltage, kV |
Max. Pulsed Voltage, kV |
Maximum Pressure, kPa (psig) |
Dielectric Compatibility |
|---|---|---|---|---|---|---|
| HN-58 | HV power supplies Capacitor charging |
RG-8/U RG-213/U |
60 60 |
40 40 |
N/A | Air or SF6 |
| HN-68 | Capacitor charging Low-current pulse lines |
RG-217/U | 70 | 120 | 410 (60) | Air, SF6 or Oil |
| HN-70 | Capacitor charging Low-current pulse lines |
DS-2196 DS-2121 |
125 150 |
100 120 |
410 (60) | Air, SF6 or Oil |
| HN-78 | mini-Marx generators (e.g., 60 ns, 10 kA) |
RG-218/U | 100 | 400 | 410 (60) | Air, SF6 or Oil |
| HN-88 | Large charge-transfer pulse lines (to 80 kA) |
DS-2248 | 100 | 120 | 410 (60) | Air, SF6 or Oil |
| HN-89 | mini-Marx generators (e.g., 60 ns, 10 kA) |
DS-2134 | 200 | 400 | 410 (60) | Air, SF6 or Oil |
| HN-98 | midi-Marx generators (e.g., 60 ns, 25 kA) |
RG-220/U | 200 | 1000 | 410 (60) | Air, SF6 or Oil |
Model HN-58 connector assembly
Reentrant cable example: Model HN-78 components
Reentrant cable example: RG-218/U cable assembly with HN-78 connector
The drawing below show installation of the HN-series jack onto the user's equipment. Here,
- A = thickness of the user's apparatus (HV terminal)
- B = distance between the grounded bulkhead and HV apparatus
- C = thickness of the grounded bulkhead
- D = reentrant length, i.e. the length of the exposed cable insulator and plug
Reentrant HN-jack installation with dimensions
Pricing for standard connectors may be obtained from the links given on our Sales page. Specifications are subject to change without notice. Inquiries for additional product information are welcome!
Last revision: Tue, 22 Nov 2022 08:16:00 +0000