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GE L30 User Manual

GE L30
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2-22 L30 Line Current Differential System GE Multilin
2.4 PILOT CHANNEL RELAYING 2 PRODUCT DESCRIPTION
2
• Performs all functions of a slave L30
• Receives current phasor information from all relays
• Performs the current differential algorithm
• Sends a current differential DTT signal to all L30 relays on the protected line
In the peer-to-peer mode, all L30 relays act as masters.
Figure 2–4: COMMUNICATIONS PATHS
2.4.2 CHANNEL MONITOR
The L30 has logic to detect that the communications channel is deteriorating or has failed completely. This can provide an
alarm indication and disable the current differential protection. Note that a failure of the communications from the master to
a slave does not prevent the master from performing the current differential algorithm; failure of the communications from a
slave to the master will prevent the master from performing the correct current differential logic. Channel propagation delay
is being continuously measured and adjusted according to changes in the communications path. Every relay on the protec-
tion system can assigned an unique ID to prevent advertent loopbacks at multiplexed channels.
IED-1
IED-1
IED-2
IED-2
IED-3
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
CHn
Rx
Rx
Optional redundant channel
Typical two-terminal application
Typical three-terminal application
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
831009A5.CDR

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GE L30 Specifications

General IconGeneral
BrandGE
ModelL30
CategoryRelays
LanguageEnglish

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