GE Multilin F650 Digital Bay Controller 5-25
5 SETPOINTS 5.4 PROTECTION ELEMENTS
5
Additional under/overvoltage (can be connected to the open delta for measured zero sequence, or to the busbar)
3 x AUXILIARY OV (59X)
3 x AUXILIARY UV (27X)
Negative sequence overvoltage:
3 x NEGATIVE SEQUENCE OV (47P)
POWER
3 x FORWARD POWER (32FP)
3 x DIRECTIONAL POWER (32)
Besides, F650 units incorporate also the following control units:
1 x setpoint GROUP
3 x OVERFREQUENCY (81O)
3 x UNDERFREQUENCY (81U)
1 x SYNCHROCHECK(25)
1 x AUTORECLOSE (79)
1 x BREAKER FAILURE (50BF)
1 x FUSE FAILURE (VTFF)
3 x BROKEN CONDUCTOR
1 x BREAKER setpointS
F650 units incorporate a flexible grouping capability for protection units. This means that protection units can be used in
either one of the following modes:
a) SINGLE SETPOINT GROUP
In this operation mode, all protection units can be activated and operate simultaneously. This provides the use of up to 87
independent protection units that can be adapted to any application requiring a high number of protection units in a
single relay.
In order to simplify the use of F650 units, this is the default mode.
b) THREE SETPOINT GROUPS
In this mode, protection units are grouped in three independent tables with 29 protection units each, so that only one of
them will be active at a given time. A logic signal, e.g. a digital input, will select which table is active at each time, providing
adaptive protection to each network condition.
Protection element grouping involves only Protection elements together with broken conductor detection and active and
directional power, which are usually considered as control elements. The rest of control elements such as recloser, fuse
failure, breaker failure, synchronism, and breaker setpoints are not involved in the tabled groups concept.
The distribution of protection units in tabled groups is described in Table 5–26:
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