
Rev.10
27/212
4.
PROTECTION FUNCTIONS
4.1.
Function 27. Definite-time phase undervoltage
There are two independent phase undervoltage functions.
This protection function is adjusted using four parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
27_1
27_2
Definite-time phase undervoltage
Permission
-
-
Yes/No
-
No
Pickup
3,0
555,0
0,1
V
10,0
Operating time
0,02
300,0
0,01
s
1,40
Reset time
0,02
300,00
0,01
s
0,20
The operating time is completely independent of the measured phase voltage, such that
should the phase voltage goes down the set value during the same amount of time or
more than the set one, the protection function acts (trips) and there it is not restored until
the measured value of the phase voltage exceeds the voltage set point during adjusting
reset time.
The function pick up occurs at 100% of the adjusted input and the dropout at 105%. The
reset type is temporized and reset time is adjusted with reset time parameter.
The accuracy of the operating time is the adjusted time ±30ms or ± 0.5% (greater of both).
4.2.
Function 27V1. Definite-time positive sequence undervoltage
This protection function is adjusted using four parameters:
Function
Description
Minimum
Maximum
Step
Unit
Default
27V1
Definite-time positive sequence undervoltage
Permission
-
-
Yes/No
-
No
Pickup
3,0
555,0
0,1
V
10,0
Operating time
0,02
300,0
0,01
s
1,40
Reset time
0,02
300,00
0,01
s
0,20
The operating time is completely independent of the measured positive sequence voltage,
such that should the positive sequence voltage goes down the set value during the same
amount of time or more than the set one, the protection function acts (trips) and there it is
not restored until the measured value of the positive sequence voltage exceeds the
voltage set point during adjusting reset time.
The function pick up occurs at 100% of the adjusted input and the dropout at 105%. The
reset type is temporized and reset time is adjusted with reset time parameter.
The accuracy of the operating time is the adjusted time ±30ms or ± 0.5% (greater of both).
Содержание SIL-V
Страница 7: ...www fanox com Rev 10 7 212 2 DIMENSIONS AND CONNECTION DIAGRAMS 2 1 Equipment front view...
Страница 8: ...www fanox com Rev 10 8 212 2 2 Equipment dimensions...
Страница 9: ...www fanox com Rev 10 9 212 2 3 Cut out pattern...
Страница 11: ...www fanox com Rev 10 11 212 3 VT configuration phase neutral...
Страница 12: ...www fanox com Rev 10 12 212 3 VT configuration phase neutral residual voltage SILVxxxx0xxxxx...
Страница 13: ...www fanox com Rev 10 13 212 3 VT configuration phase neutral busbar voltage SILVxxxx2xxxxx...
Страница 14: ...www fanox com Rev 10 14 212 3VT configuration phase phase residual voltage...
Страница 15: ...www fanox com Rev 10 15 212 2VT configuration phase phase residual voltage...
Страница 17: ...www fanox com Rev 10 17 212 2 5 Terminals...
Страница 25: ...www fanox com Rev 10 25 212 3 3 Functional Diagram...
Страница 192: ...www fanox com Rev 10 192 212...
Страница 210: ...www fanox com Rev 10 210 212 12 9 Comments Person in charge of commissioning Date Maintenance performed on the by...
Страница 211: ...www fanox com Rev 10 211 212 NOTES...
Страница 212: ...www fanox com Rev 10 212 212...