Toshiba GR200 Series Instruction Manual page 69
Centralized busbar protection ied
Hide thumbs
Also See for GR200 Series:
- Instruction manual (1770 pages) ,
- Instruction manual (22 pages) ,
- Instruction manual (1051 pages)
Table of Contents
Advertisement
Internal fault on the bus-bar and existence of a circuit-breaker-failure condition on
the bus-coupler CB (CBC)
Incident
Trip issuing and Operation
Step1
Fault occurrence in zone A of the bus-bar
Remote
end
Step2
Operation of Bus-bar protection:
Remote
end
Step3
Operation of CBC Re-trip:
Remote
end
Step4
Operation of CBF Zone-trip:
Remote
end
Note: CBC is connected to zone A and zone B of
the bus-bar.
Failure of CB
CB closed
CB open
CBF re-trip
CBF trip
Table 2.2-4 Operation example #2
Busbar
Busbar
Zone A
Zone B
CB11
CB12
CBC
Busbar
Busbar
Zone A
Zone B
CB11
CB12
CBC
Busbar
Busbar
Zone A
Zone B
CB11
CB12
CBC
Busbar
Busbar
Zone A
Zone B
CB11
CB12
CBC
- 55 -
Comment
A fault occurs in zone A.
CB21
CB22
All CBs connected to zone A
of the bus-bar are tripped.
However, the bus-coupler
CB (CBC) fails to trip.
CB21
CB22
A CBF Re-trip command is
issued to the target CB
(CBC)
protection. If tripping by the
CB21
target
successful using the CBF
CB22
Re-trip
operation of CBF protection
is complete.
If the target CB (CBC) fails
to trip at Step 3, a CBF
Zone-trip
issued to all adjacent CBs
CB21
connected to zone A and
zone B of the bus-bar
CB22
protection. Thus, the fault is
removed by tripping all
adjacent CBs connected to
the bus-bars zone A and
zone B.
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
6F2S1931 (0.20)
by
the
CBF
CB
(CBC)
is
command,
then
command
is
- Quick Links:
- Table of Contents
Hide quick links:
Advertisement
Chapters
Table of Contents
