ABB REL 551 2.3 Series Installation And Comissioning Manual page 80

Line differential protection terminal
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74
Preparing for test
IL1
IL2
IL3
NI
UL1
UL2
UL3
UN
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The user must verify that the connection and that the analog signals are measured cor-
rectly.
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The phasor menu is located in the local-HMI under:
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Consider set ratio factors for CT's and VT's.

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The frequency and active power are located in the local-HMI un-
der:
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IL1
IL2
IL3
IN (I4,I5)
UL1
UL2
UL3
UN
UN (U4,U5)
TRIP L1
TRIP L2
TRIP L3
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&KDSWHU 
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