ABB TPU 4x.xx Indoor Supporting Current Transformers,
Parameters Units
Highest voltage for equipment 3.6 – 12 kV,
Power frequency test voltage, 1 min. 10 – 42 kV,
Lighting impulse test voltage 40 – 95 kV,
Rated primary current 10 – 3 200 A,
Rated short-time thermal current 2 – 100 kA/ 1s,
Reconnectable (primary till 2×600 A) primary or,
secondary.
The TPU 4x.xx transformers are cast in epoxy
furthermore resin and designed for insulation voltages up to,
12 kV. The 3.6 kV and 7.2 kV versions have the,
furthermore same dimensions as the 12 kV. For certain types,
of panels there is a need for extra long creepage,
distance on the transformers. For this purpose,
also you can order current transformers with „ribs on,
the top”. The transformers are manufacture in,
conformity with dimensions stated hereunder.
also The TPU 4x.xx transformers are designe as single-turn or multi-turn versions,
with one transformer ratio or with double ratio having the possibility to be reconnectable on the primary or on
also the secondary side. The number of secondary,
windings (from 1 to 6 – max. 12 secondary terminals – 2 rows),
moreover depends on the combination of the
technical parameters (such as the accuracy class,
burden, short-circuit current, overcurrent factor…) and the transformer dimensions size.
