Overfrequency Protection Daptof - ABB RELION 630 Series Applications Manual

1MRS757582 C
3.2.6.10
REG630
Application Manual
FUSE_FAILURE
FUSE_FAILURE
GUID-76AA70CF-0312-4163-96D9-2883C9CDAB00 V1 EN
Figure 13: Generator voltage protection

Overfrequency protection DAPTOF

Overfrequency protection function is used for protecting a network component from
possible damage caused by overfrequency conditions. Two instances of
overfrequency functions are used with DT characteristic. The set of three phase
voltages, U3P, is connected to the inputs.
A common operate and start signal from the both overfrequency protection functions
is connected to an OR-gate to form a combined overfrequency operate and start signal,
which provides a LED indication on the LHMI. Also a separate start signal from the
both instances is connected to the disturbance recorder. However, the operate signal
from both stages is connected to the OR-gate to form a combined overfrequency
operate signal, and connected to the disturbance recorder.
UNDER VOLTAGE PROTECTION
PHPTUV(1)
3U<
27
3U START
BLOCK OPERATE
PHPTUV(2)
3U<
27
3U START
BLOCK OPERATE
OVER VOLTAGE PROTECTION
PHPTOV(1)
3U>
59
3U START
BLOCK OPERATE
PHPTOV(2)
3U>
59
3U START
BLOCK OPERATE
Section 3
REG630 variants
COMMON
OR
OPERATE
COMMON
OR
OPERATE
37