204
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
11.2.
Incoming feeder, High H02
11.2.1.
Features
This application example describes an incoming feeder to a single busbar with
parallel incoming feeders including:
• Directional overcurrent protection
• Non-directional overcurrent protection
The network is either compensated earthed or isolated. The directional overcurrent
protection is used because of the parallel incoming feeders. There is no earth fault
protection included in this application example because residual voltage-based
protection can be located on the measurement cubicle of the busbar.
The three-phase current measurement is established with current transformers and
the residual voltage is measured with a set of voltage transformers in an open-delta
connection. Phase-to-phase voltage measurements are established with voltage
transformers.
Fig. 11.2.1.-1
H02 used for protection, measuring and supervision on an
incoming feeder in a single busbar system with parallel feeders.
The system earthing on the supplying network is compensated or
isolated.
REX 521 H02
Application Example 9
3I>
67
f
P
3U
3I
Q
E
pf
TCS
CBCM
0
I
MCS
3I~harm
000
R
3U~harm
CBFP */62
U
0
3I >
50/51
User
IncH02
Содержание REX 521
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