RHM International, LLC

Innovative High Reliability High Voltage Equipment for the Power Grid

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STB-L Series: Wall Bushing with CT

RHM is proposing a combined wall bushing and current transformer option for specific applications.  Very compact, it uses a toroidal type current transformer mounted around the bushing.

Performance

  • Rated voltage: 40.5 - 252kV
  • Rated transformation ratio: 100~2500/5A or 100~2500/1A
  • Rated frequency: 50Hz-60Hz
  • Rated output: 20-40VA
  • Metering accuracy class: 0.2S, 0.2, 0.5S and 0.5 class
    Accuracy limit factor 5,10, 15, 20, 30, 40
  • Protection accuracy class: 5P, 10P
  • Secondary windings: 1-6

Operational Conditions

  1. Environmental temparature: -50C / +45C
  2. Altitude: <1000m above sea level (when higher than 1000m, specific design available. Please contact us)
  3. Creepage distances: in the range 25 to 31 mm/kV

Typical dimensions – please contact us for custom designs:

Model
and
Specification
Highest Voltage for
Equipment
(kV)
Rated
Current
(A)
Dimensions(mm)Creepage
Distance
(mm)
LL1L2L3L4a1a2b1b2
STB - L - 40.5 / 63040.56301640350450350104540803003601015
STB - L - 40.5 / 200040.52000~25001740
3504503501095601203003601015
STB - L - 72.5 / 63072.563027706301000
630155040803504001925
STB - L - 72.5 /160072.5160028206301000
9601575501003504001925
STB - L - 126 / 63012663034709601100960185040803504003200
STB - L - 126 / 2000~25001262000362096011009601930601203504003200
STB-L-Wall-Bushing-with-CT-drawing-3a
 pic-004

More Information

To view our technical papers, click here.

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