ABB Relion 670 series - Setting parameters; Pole slip protection PSPPPAM (78); Introduction

Table 167: ZMRPSL Output signals
Name Type Description
TRIP BOOLEAN Trip through Power Swing Logic
PUZMURPS BOOLEAN Pickup of Underreaching zone controlled by PSL to be
used in configuration
BLKZMUR BOOLEAN Block trip of underreaching impedance zone
BLKZMOR BOOLEAN Block trip of overreaching distance protection zones
CS BOOLEAN Carrier send signal controlled by the power swing
6.12.5 Setting parameters
Table 168: ZMRPSL Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
tDZ 0.000 - 60.000 s 0.001 0.050 Permitted max oper time diff between higher
and lower zone
tDZMUR 0.000 - 60.000 s 0.001 0.200 Delay for oper of underreach zone with
detected diff in oper time
tCS 0.000 - 60.000 s 0.001 0.100 Conditional timer for sending the CS at power
swings
tTrip 0.000 - 60.000 s 0.001 0.100 Conditional timer for tripping at power swings
tBlkTr 0.000 - 60.000 s 0.001 0.300 Timer for blocking the overreaching zones trip
6.13 Pole slip protection PSPPPAM (78)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Pole slip protection PSPPPAM U
cos
78
6.13.1 Introduction
Sudden events in an electrical power system such as large changes in load, fault
occurrence or fault clearance, can cause power oscillations referred to as power swings.
In a non-recoverable situation, the power swings become so severe that the
synchronism is lost, a condition referred to as pole slipping. The main purpose of the
pole slip protection (PSPPPAM ,78) is to detect, evaluate, and take the required action
for pole slipping occurrences in the power system. The electrical system parts swinging
Section 6 1MRK505222-UUS C
Impedance protection
360
Technical reference manual