ABB FI830F 3BDH000032R1 serial field bus module
• Wide CT ratio correction range: accuratecorrection through digital setting
• No interposing current transformers
needed for the protection of two-winding
power transformers: numerical vector
group matching on HV and LV side
• Four heavy-duty output relays for circuit
breaker tripping and five output relays for
signalling
• Five programmable external control inputs
intended for alarm and trip signals from gas
relays, oil temperature sensors and other
sensors of transformer auxiliary devices
• Integrated circuit-breaker failure protection
with adjustable operate time
• Differential relay and earth-fault relay mod ules provided with integrated disturbance
recorder functions for analog and digital
signals: signals to be used for triggering
selectable
• Sensitive phase current and phase angle
displays facilitate checking of energizing
circuit connections and vector group
matchings
• High immunity to electrical and electromag netic interference allows the relay to be
used in severe environments
• High availability and system reliability due
to continuous supervision of hardware and
software
• Powerful software supports relay parame terization and reading of measured and
recorded values and event data
• Member of the SPACOM product family
and ABB’s Distribution Automation system
• CE marking according to the EC directivefor EMC

is designed for protecting two-winding power
transformers and generator-transformer units
against winding short-circuit, interturn fault,
earth fault and short circuit, and generators
and motors against interwinding faults and
pole short circuit. In addition, the relay can be
used for the protection of three-winding
power transformers, provided 75% of the
short circuit power to the power transformer
is supplied from the same direction, and for
the protection of compensating chokes and
short cable lines.
No interposing transformers are needed for
the protection of two-winding power trans formers, as the relay allows the vector group
matching, the elimination of the zero sequence component of the phase currents
and the CT ratio corrections to be carried out
numerically