Bus Coupler In A Solidly Grounded Network - ABB REC650 Applications Manual

1MRK 511 286-UUS A
Function
Directional over-power protection GOPPDOP
(32)
Negative sequence based overcurrent
protection DNSPTOC (46)
Two step undervoltage protection UV2PTUV
(27)
Two step overvoltage protection OV2PTOV
(59)
Two step residual overvoltage protection
ROV2PTOV (59N)
Under frequency protection SAPTUF (81)
(instance 1)
Under frequency protection SAPTUF (81)
(instance 2)
Over frequency protection SAPTOF (81)
(instance 1)
Over frequency protection SAPTOF (81)
(instance 2)
Rate-of-change of frequency protection
SAPFRC (81) (instance 1)
Rate-of-change of frequency protection
SAPFRC (81) (instance 2)
Current circuit supervision CCSRDIF (87)
Fuse failure supervision SDDRFUF
Breaker close/trip circuit monitoring
TCSSCBR
Synchrocheck, energizing check, and
synchronizing SESRSYN (25)
Autorecloser SMBRREC (79)
2.3.4
Application manual
Application 1
Application dependent
Application dependent
Application dependent
Application dependent
Disabled
Application dependent
Application dependent
Application dependent
Application dependent
Application dependent
Application dependent
Enabled
Enabled
Enabled
Application dependent
Enabled

Bus coupler in a solidly grounded network

Normally the following fault scenarios require back-up protection functions:
• Short circuits on one of the busbar sections and short circuits on outgoing lines. For
these faults the four step phase overcurrent protection should be used. The four step
phase overcurrent protection has the possibility of directional function as well as
different time delay characteristics. It is important to base the setting on fault
calculations considering different operational states as well as time delay
coordination with other protections in the system.
• Phase-to-ground faults one of the busbar sections and phase-to-ground faults on
outgoing lines. For these faults the four step residual overcurrent protection should be
used. The four step residual overcurrent protection has the possibility of directional
Application
Application 2
Application dependent
Application dependent
Application dependent
Application dependent
Enabled
Application dependent
Application dependent
Application dependent
Application dependent
Application dependent
Application dependent
Enabled
Enabled
Enabled
Application dependent
Enabled
Section 2
35