ABB RED650 Applications Manual

The tPickUpWEI is the on-time delay to activate the weak-end infeed function. Set
tPickUpWEI to 10 ms, a short delay is recommended to avoid that spurious carrier
received signals will activate WEI and cause unwanted carrier send (ECHO)
signals.
When single phase tripping is required, a detailed study of the
voltages during phase-to-phase and phase-to-earth faults should be
done, at different fault locations.
13.3 Local acceleration logic ZCLCPSCH
SEMOD52894-1 v4
13.3.1 Identification
M14860-1 v4
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Local acceleration logic ZCLCPSCH - -
13.3.2 Application
M13821-3 v4
The local acceleration logic (ZCLCPSCH) is used in applications where a
conventional teleprotection scheme is not available (no communication channel),
but where the user still requires fast clearance for faults on the whole line.
The logic can be controlled either by the autorecloser (zone extension) or by the
loss-of-load current (loss-of-load acceleration).
The loss-of-load acceleration gives selected overreach zone permission to operate
instantaneously after checking the loss-of-load condition. It can not operate for
three-phase faults.
13.3.3 Setting guidelines
M13854-4 v4
The parameters for the local acceleration logic functions are set via the local HMI
or PCM600.
Set ZoneExtension to On when the first trip from selected overreaching zone shall
be instantaneous and the definitive trip after autoreclosure a normal time-delayed
trip.
Set LossOfLoad to On when the acceleration shall be controlled by loss-of-load in
healthy phase(s).
Section 13 1MRK 505 393-UEN B
Scheme communication
288 Line differential protection RED650 2.2 IEC
Application manual

ABB RED650 Specifications

General

Brand	ABB
Model	RED650
Category	Protection Device
Language	English