ABB RER620, Техническое руководство

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Section 5
1MAC309294-MB F
Control functions
284 RER620
Technical Manual
for a selected time period is implemented through automatic reclosing, during which most
of the faults can be cleared.
In case of a permanent fault, the automatic reclosing is followed by final tripping. A
permanent fault must be located and cleared before the fault location can be re-energized.
In a distribution network, bulk of the load is single phase / independent. It is therefore not
necessary to de-energize all three phases for a single phase fault. The single phase
auto-reclose function SDARREC can be used for auto-reclosing together with any circuit
breaker that has the characteristics required for single phase auto-reclosing. For
multi-phase asymmetrical faults, the trip should occur on the tripped as well as the picked
up phases.
The function provides five programmable auto-reclose shots which can perform one to
five successive auto-reclosings of desired type and duration, for instance one high-speed
and one delayed auto-reclosing.
The SDARREC allows single phase operations, where the number of poles operating
together can be one, two or three, depending on fault conditions. Once a fault occurs, the
"Active Phase Detection" function determines which phases are to be active for the next
reclose shot.
The autorecloser function used by the SDARREC receives equivalent “TRIP”,
“PoleStatus”, etc. signals that are formed by integrating individual phase signals from the
active phases. It performs its logic and generates equivalent OPEN / RECLOSE /
LOCKOUT etc. signals. Subsequent logic then routes these signals to the appropriate,
“active” phase outputs.
5.2.3.1 Single phase tripping
The single phase tripping function is controlled by the settings SinglePhaseMode and Shot
Mode 1...5. The SinglePhaseMode setting can have three values, OPUP, OOAP and
APAT.
The value OPUP stands for “Only Picked Up Phases”. With this value, the SDARREC will
trip the tripped and picked up phases. Unfaulted phase(s) will stay closed.
The value OOAP stands for “One Or All Phases”. With this value, the SDARREC will trip
the tripped and picked up phases as in the OPUP mode. Additionally, it will also look at
whether only one phase is going to be left closed as a result of the OPUP logic. If so, it will
trip the remaining phase as well.
The value APAT stands for “All Poles All the Time”, and effectively disables the single
phase mode. All the poles are operated always.
In addition, the Shot Mode settings can override the SinglePhaseMode setting for each
specific reclose shot, and on a per autorecloser input basis. These settings values can be
either 0 or 1. When the value is 0, the SinglePhaseMode setting determines the number of
phases opening. When the value is 1, all three poles will open, regardless of the
SinglePhaseMode setting.