Local Acceleration Logic Zclcpsch; Identification; Application - ABB RELION 650 Series Applications Manual

Section 13
Scheme communication
Current reversal logic
OperCurrRev to On to activate the function.
Set
tDelayRev timer at the maximum reset time for the communication equipment that gives
Set
the carrier receive (CRLx) signal plus 30ms. A minimum setting of
60ms .
typical
tDelayRev setting increases security against unwanted tripping, but delay the fault
A long
clearing in case of a fault developing from one line to involve the other one. The probability of
this type of fault is small. Therefore set
Set the pickup delay
20ms .
Weak-end infeed logic
OperationWEI to Echo , to activate the weak-end infeed function with only echo function.
Set
OperationWEI to Echo&Trip to obtain echo with trip.
Set
Set tPickUpWEI to 10 ms, a short delay is recommended to avoid that spurious carrier received
signals will activate WEI and cause unwanted communications.
Set the voltage criterion
voltage
above the voltage that occurs for fault on the protected line. The phase-to-phase elements
must be verified to not operate for phase to earth faults.
13.4

Local acceleration logic ZCLCPSCH

13.4.1

Identification

Function description
Local acceleration logic
13.4.2

Application

The local acceleration logic (ZCLCPSCH) is used in those applications where conventional
teleprotection scheme is not available (no communication channel), but the user still require
fast clearance for faults on the whole line.
This logic enables fast fault clearing during certain conditions, but naturally, it can not fully
replace a teleprotection scheme.
The logic can be controlled either by the autorecloser (zone extension) or by the loss-of-load
current (loss-of-load acceleration).
262
tPickUpRev to <80% of the breaker operate time, but with a minimum of
UPP< and UPE< for the weak-end trip to 70 % of the system base
UBase . The setting should be below the minimum operate voltage of the system but
When single phase tripping is required a detailed study of the voltages at
phase-to-phase respectively phase-to-earth faults, at different fault locations,
is normally required.
tDelayRev with a good margin.
IEC 61850 IEC 60617
identification identification
ZCLCPSCH -
1MRK 505 363-UEN A
40ms is recommended,
SEMOD52894-1 v4
ANSI/IEEE C37.2
device number
-
Application manual
M14860-1 v4
M13821-3 v3