ABB Relion 670 series - Setting parameters; Scheme communication logic for residual overcurrent protection ECPSCH (85); Introduction

Table 433: ZCLCPLAL Output signals
Name Type Description
TRZE BOOLEAN Trip by zone extension
TRLL BOOLEAN Trip by loss of load
13.4.5 Setting parameters
Table 434: ZCLCPLAL Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IBase 1 - 99999 A 1 3000 Base setting for current values
LoadCurr 1 - 100 %IB 1 10 Load current before disturbance in % of IBase
LossOfLoad Disabled
Enabled
- - Disabled Enable/Disable operation of Loss of load.
ZoneExtension Disabled
Enabled
- - Disabled Enable/Disable operation of Zone extension
MinCurr 1 - 100 %IB 1 5 Lev taken as curr loss due to remote CB trip
in % of IBase
tLowCurr 0.000 - 60.000 s 0.001 0.200 Time delay on pick-up for MINCURR value
tLoadOn 0.000 - 60.000 s 0.001 0.000 Time delay on pick-up for load current release
tLoadOff 0.000 - 60.000 s 0.001 0.300 Time delay on drop off for load current release
13.5 Scheme communication logic for residual overcurrent
protection ECPSCH (85)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Scheme communication logic for
residual overcurrent protection
ECPSCH - 85
13.5.1 Introduction
To achieve fast fault clearance of ground faults on the part of the line not covered by
the instantaneous step of the residual overcurrent protection, the directional residual
overcurrent protection can be supported with a logic that uses communication channels.
In the directional scheme, information of the fault current direction must be transmitted
to the other line end. With directional comparison, a short operate time of the
1MRK505222-UUS C Section 13
Scheme communication
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