ABB REX 521 - Implementations; Incoming Feeder, High H05; Features

220
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
11.4.6. Implementations
The implementations for the seventh application example (see Section 10.3.
Outgoing feeder, Medium M02) are also applicable for this application example.
11.5. Incoming feeder, High H05
11.5.1. Features
This application example describes an incoming feeder to a single busbar including:
• Overcurrent protection
• Non-directional earth fault protection
• Overvoltage protection
• Undervoltage protection
This application example is an optional solution for the second application example
(Section 9.2. Incoming feeder, Basic B01), if overvoltage and undervoltage
protection is required or wider range of measurements is needed.
The network is resistance or solidly earthed. The three-phase current measurement
is established with current transformers. The neutral current is measured via a
current transformer located in the neutral earthing circuit on the LV side of the
power transformer. Phase-to-phase voltage measurements are established with
voltage transformers.
Fig. 11.5.1.-1 H05 is used for protection, measuring and supervision on an
incoming feeder in a single busbar system. The supplying network
is either solidly or resistance earthed
REX 521 H05
Application Example 12
3U< 27
3U>
59
3I > 50/51
UserIncH05
f
P
3U
3I
Q
E
pf
TCS
CBCM
0
I
MCS
3I~harm
000
R
3U~harm
CBFP
*/62
I >
0
50N/51N
I
0