Zone Interconnection (Load Transfer) Bzitggio, Bzisggio; Introduction - ABB Relion 670 Series Technical Reference Manual

Section 5
Differential protection
Table 80: BUSPTRC_B1 Group settings (basic)
Name
CTConnection
ZoneSel
ZoneSwitching
CheckZoneSel
tTripPulse
tZeroCurrent
tInvertCurrent
Table 81: BUSPTRC_B1 Non group settings (basic)
Name
BAY01
5.1.10
5.1.10.1
144
Values (Range) Unit
Conn Inverted -
NotConnected
Connected
FixedToZA -
FixedToZB
FixedToZA&-ZB
CtrlIncludes
CtrlExcludes
ForceOut -
ForceIn
Conditionally
NotConnected -
Connected
0.000 - 60.000 s
0.000 - 60.000 s
0.000 - 60.000 s
Values (Range) Unit
0 - 13 -

Zone interconnection (Load transfer) BZITGGIO, BZISGGIO

Introduction

When this feature is activated the two integrated differential protection zones are
merged into one common, overall differential zone. This feature is required in
double busbar stations when in any of the feeder bays both busbar disconnectors
are closed at the same time (that is, load transfer). As explained in above section
Bay each CT input will then behave in the pre-set way in order to ensure proper
current balancing during this special condition. This feature can be started
automatically (when Zone Selection logic determines that both busbar
disconnectors in one feeder bay are closed at the same time) or externally via
dedicated binary signal. If this feature is active for longer time than the pre-set vale
the alarm signal is given.
Step Default
- Connected
- CtrlIncludes
- ForceIn
- NotConnected
0.001 0.200
0.001 0.200
0.001 0.200
Step Default
1 BayName01
1MRK 505 208-UEN B
Description
Hardware CT input connection to the bay
function block
How bay/CT is controlled toward the
zones
Bay/CT status during zone switching
Bay/CT status for the check zone
Bay trip pulse duration if zone trips in
SelfReset mode
Time delay to force current to zero via
binary signal
Time delay to invert current via binary
signal
Description
User defined name for bay
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