ABB REF615 ANSI 5.0 FP1 Product Manual page 32

32 R E F 6 1 5 A N S I 5 . 0 F P 1 F E E D E R P R OT E C T I O N A N D C O N T R O L
—
The choice between the HSR and PRP redundancy
Figure 16. High availabil-
ity seamless redun-
protocols depends on the required functionality,
dancy (HSR) solution
cost and complexity. The self-healing Ethernet ring
solution enables a cost-efficient communication
ring controlled by a managed switch with standard
Rapid Spanning Tree Protocol (RSTP) support. The
managed switch controls the consistency of the
loop, routes the data and corrects the data flow in
case of a communication switch-over. The relays in
COM600
Redundancy
Box
IEC 61850 HSR
REF615 REF620
the ring topology act as unmanaged switches for-
warding unrelated data traffic. The Ethernet ring
solution supports the connection of up to 30 615
series relays. If more than 30 relays are to be con-
nected, it is recommended to split the network into
several rings. The self-healing Ethernet ring solu-
tion avoids single point of failure concerns and im-
proves the reliability of the communication.
SCADA
Redundancy
Box
RET620 REM620
Devices not supporting HSR
Ethernet switch
Redundancy
Box
REF615