Figure 288: Hsr Application In The Substation; Figure 289: Ied Attached To Redundant Ethernet Star Or Ring Circuit; Rapid Spanning Tree Protocol - GE MiCOM P40 Agile Technical Manual

Single breaker current differential (with distance)

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DS Agile gateways

Figure 288: HSR application in the substation

RSTP is a standard used to quickly reconnect a network fault by finding an alternative path. It stops network loops

whilst enabling redundancy. It can be used in star or ring connections as shown in the following figure.

Star connection with redundant ports

managed by RSTP blocking function .

The RSTP implementation in this product is compatible with any devices that use RSTP.

RSTP can recover network faults quickly, but the fault recovery time depends on the number of devices on the

network and the network topology. A typical figure for the fault recovery time is 300ms. Therefore, RSTP cannot

achieve the "bumpless" redundancy that some other protocols can.

Refer to IEEE 802.1D 2004 standard for detailed information about the opration of the protocol.

P54x1i-TM-EN-1

T1000 switch

Ring connection managed by RST P

blocking function on upper switches

and IEDs interconnected directly .

Chapter 22 - Communications

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