ABB Relion 630 Series, Applications Manual

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Also a separate start and operate signal from both instances is connected to the
disturbance recorder.
The residual overvoltage function is blocked on detection of fuse failure.
3.2.6.8 Three-phase overvoltage protection PHPTOV
The three-phase overvoltage protection function is used for phase-to-phase or phase-
to-earth overvoltage protection with DT or IDMT characteristics.
The configuration includes two instances of phase overvoltage function blocks. A set
of three phase voltages, U3P is connected to the inputs.
A common operate and start signal from the both phase overvoltage protection
functions are connected to an OR-gate to form a combined phase overvoltage operate
and start signal which provides a LED indication on the LHMI. Also a separate start
and operate signal from the both instances is connected to the disturbance recorder.
3.2.6.9 Three-phase undervoltage protection PHPTUV
The three-phase undervoltage protection function is used for phase-to-phase or phase-
to-earth overvoltage protection with DT or IDMT characteristics.
The configuration includes two instances of undervoltage function blocks. The set of
three phase voltages, U3P is connected to the inputs. The undervoltage function is
blocked by the fuse failure function.
A common operate and start signal from the both phase undervoltage protection
functions is connected to an OR-gate to form a combined phase undervoltage operate
and start signal, which provides a LED indication on the LHMI. Also a separate start
and operate signal from the both instances is connected to the disturbance recorder.
Section 3
1MRS757582 C
REG630 variants
36 REG630
Application Manual