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CC14B

Coupling Capacitors

The Power Diagnostix line of coupling devices includes quadrupoles, current transformers, and coupling capacitors to adapt Power Diagnostix PD detectors to different measurement tasks. The coupling device in a PD measuring circuit provides the means of sensing the partial discharge pulse and sending it as a voltage signal to a preamplifier for conditioning.

CC50 & CC100

Coupling Capacitors

The Power Diagnostix line of coupling devices includes quadrupoles, current transformers, and coupling capacitors to adapt Power Diagnostix PD detectors to different measurement tasks. The coupling device in a PD measuring circuit provides the means of sensing the partial discharge pulse and sending it as a voltage signal to a preamplifier for conditioning.

Coupling Capacitors

Standard coupling capacitors

Analyzing the discharge activity requires the permanent installation of coupling devices. Preferably, such coupling devices are capacitive couplers terminated by a power separation filter.

Power Diagnostix standard coupling capacitors are mounted on sturdy cast aluminum enclosures and can be used for on-line and off-line measurements on rotating machines as well as for a variety of smaller test setups. A wider range of coupling capacitors and capacitor assemblies complete with quadrupoles and preamplifiers is available on request. The table to the right lists some standard models of coupling capacitors provided by Power Diagnostix, along with their built-in circuits, if present.

Coupler Termination Boxes

A coupler termination box is necessary for providing the protective ground for the coupler's BNC signal cable.

Type Channel Spark
gap
IN OUT
CTB1A 3x 350 V BNC BNC
CTB1C 3x 350 V TNC BNC
CTB2A 4x 350 V BNC BNC
CTB2C 4x 350 V TNC BNC

ATEX Couplers

EX logo

For areas exposed to explosion hazards Power Diagnostix offers the CC15A /Ex, a special coupling capacitor for Ex environments to prevent igniting of explosive atmospheres. The coupler can be used in hazardous areas in zone 2 for fixed mounted coupling of high frequency partial discharge signals with low energy.

The equipment is tested and approved for explosion hazard areas according to:

  • Directive 2014/34/EU
  • DIN/EN 60079-0
  • DIN/EN 60079-15