Capacitor Blocking Units - SPECIALTY TRANSFORMERS WEBSITE

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Capacitor Blocking Units (CBU’s) are used to prevent loss of high frequency power line communication signals through grounded capacitor banks.


PRODUCT ATTRIBUTES

  • Rated for Currents of 15,30,60, 85 amps designed for 125 kV BIL

  • Special millihenries available

  • Mounting Pole or cross-arm Construction

  • Distribution-style tank fitted with a standard NEMA hanger and chime ring cover construction

   
APPLICATIONS

  • A high impedance inductor that prevents distribution line carrier signals from being shunted to ground through grounded distribution capacitors.

  • Provides low impedance to ground at 50 or 60 hertz power frequency, but a high impedance to ground to the carrier signal.

  • Designed to withstand the switching duty imposed by switched capacitor banks and fault currents that may be associated with capacitor failures.

  • A single CBU is needed for each phase of a single bushing, ground capacitor bank.

  • The three-phase bank composed of two bushing capacitors may be blocked with a single CBU placed in the common or neutral of the capacitor bank.   


 
 
 
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