GE 350 Communications Manual page 89

CHAPTER 4: SR3 IEC61850 GOOSE
NOTE:
350 FEEDER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
SR3 GOOSE implementation
Before we proceed we will review the SR3's IEC61850 implementation. The SR3 family of
relays can receive and transmit both digital and analog information. However, currently
only digital status information received via GOOSE can be used within the SR3 relays.
Transmission data block
Each SR3 relay has one GOOSE transmission data block consisting of up to 64 data items.
Once configured, this block is transmitted at power-up, on a pre-configured time basis
(ranging from 1 to 60 seconds) and within a window of 4 to 10 ms after a digital point
within the data block has changed state.
Reception data blocks
Each SR3 relay has eight GOOSE receive data blocks. Each receive data block consists of
up to 64 data items and is configured to receive the transmission from a specific device on
the network. Received digital status information from any of the eight receive data blocks
is mapped into the local SR3's 32 remote digital input locations such that this status can be
used by the local relay.
The total number of items that can be received is affected by the number of GOOSE
receives that have been configured, the type of data item, and by whether or not the
quality is to be received with the item.
The SR3 IEC61850 Device Configurator allows the user to build the GOOSE transmission by
dragging and dropping digital and analog values from the SR3 logical nodes directly into
the GOOSE transmission message. The SR3's IEC61850 logical nodes include five General
Generic Input/Output logical nodes referred to as GGIO X where "X" represents an index
(from 1 to 5 in the case of the SR3) used to differentiate between different GGIO logical
nodes.
SR3 GOOSE CONFIGURATION VIA THE IEC 61850 CONFIGURATOR
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