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Live Tank Circuit Breaker EDT with integrated current transformers 36 – 72.5 kV

Compact multifunctional module energized in less than 8 hours at site

The EDT SK is a combined apparatus including an ED type SF6 live tank circuit breaker, with a central compartment per pole, including an integrated current transformer. By eliminating high voltage connection between the circuit breaker and the instrument transformers, energy losses and thereby overall life-cycle costs are reduced.

The circuit breakers are available for single or three pole operation. Each set of current transformers has two primary ratios and up to three secondary windings.

Applications

  • Switching of power transformers and high voltage lines
  • Switching of capacitor banks, reactors and filters
  • Revenue metering
  • Mobile substations

Why ABB?

  • Compact design with integrated current transformers
  • Factory assembled poles that facilitate easy installation at site in less than 8 hours
  • No extra testing needed at site as the unit is tested at the factory
  • Increased reliability and availability
  • Global service organization, local everywhere 

 Brief performance data

EDT SK 1-1  72.5 kV
Rated voltage kV 36 - 72
Frequency Hz 50 - 60
Rated current A up to 1600
Rated Breaking current kA 25 - 31.5
Primary current A

100/200 to 800/1600

Secondary current  A  1 - 5
Protection  VA   10 - 30 , 5P20
Measurement  VA  10 - 30, Class 0.2s, 0.2 and 0.5

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