Micom P634 - Page 748

Parameter Address
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SFMON: Iref, d inval. rang
091 016
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The reference current determined by the P634 for differential protection is not
within the permissible range.
Device reaction: Protection is blocked.
“Warning” output relay: Updating
“Blocked/faulty” output relay: –
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SFMON: Matching fail. end a
091 000
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SFMON: Matching fail. end b
091 001
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SFMON: Matching fail. end c
091 002
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SFMON: Matching fail. end d
091 017
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The calculated amplitude matching factor of the differential protection function
is above the permissible range.
Device reaction: Protection is blocked.
“Warning” output relay: Updating
“Blocked/faulty” output relay: –
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SFMON: Ratio mtch.fact.inv.
091 004
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The ratio of the amplitude matching factors for differential protection is not
within the permissible range.
Device reaction: Protection is blocked.
“Warning” output relay: Updating
“Blocked/faulty” output relay: –
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SFMON: 2nd match.fact. inv.
091 006
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The second highest amplitude matching factor for differential protection is
smaller than permitted.
Device reaction: Protection is blocked.
“Warning” output relay: Updating
“Blocked/faulty” output relay: –
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SFMON: Inv.range Iref REF_1
091 105
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SFMON: Inv.range Iref REF_2
091 115
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SFMON: Inv.range Iref REF_3
091 125
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The reference current determined by the P634 for ground differential protection
is not within the permissible range.
Device reaction: Protection is blocked.
“Warning” output relay: Updating
“Blocked/faulty” output relay: –
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SFMON: Match.f. kam,N REF_1
091 101
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SFMON: Match.f. kam,Y REF_1
091 102
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SFMON: Match.f. kam,N REF_2
091 111
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SFMON: Match.f. kam,Y REF_2
091 112
P634 11 Troubleshooting
11-14 P634/EN M/R-42-A // P634‑311‑653