Inductive Combined Transformer EJAF high-voltage,
Combined instrument transformers of type EJAF are used in high-voltage switchgear from 123 – 420 kV.
They convert high voltages and currents into standardized,
equivalent values for meters, measuring and protection devices.
Features
The German transmission system operators have announced,
that they want to use gas-insulated measuring transducers,
with a global warming potential of <1 for outdoor installations in the future.
Only non-fluorinated gases can meet these requirements.
Pfiffner has opted to develop high-voltage measuring transducers,
with synthetic air (80% N2 and 20% O2), known as ecosAIR.
The basic concept is the same as for SF6.
The similar design of the components to the proven SF6 instrument transformers guarantees,
that Pfiffner’s decades of experience will be transferred to future generations.
