Settings Of The Differential Protection - Siemens Siprotec 7UM62 Manual

2.12.2.3 Settings of the Differential Protection

Addr. Setting Title
2001 DIFF. PROT.
2005 INC.CHAR.START
2006 INRUSH 2.HARM.
2007 RESTR. n.HARM.
2021 I-DIFF>
2026A T I-DIFF>
2031 I-DIFF>>
2036A T I-DIFF>>
2041A SLOPE 1
2042A BASE POINT 1
2043A SLOPE 2
2044A BASE POINT 2
2051A I-REST. STARTUP
2052A START-FACTOR
2053 T START MAX
2056A I-ADD ON STAB.
2057A T ADD ON-STAB.
2061 2. HARMONIC
CROSSB. 2. HARM 2..1000 Cycle; 0; ∞
2062A
2071 n. HARMONIC
2072A CROSSB. n.HARM
7UM62 Manual
C53000-G1176-C149-3
for each differential protection level and each phase. The dropout delay is linked to the
minimum trip command duration that is valid for all protection functions.
All setting times are additional time delays which do not include the operating times
(measuring time, drop-out time) of the protective function.
Setting Options
OFF
ON
Block relay for trip com-
mands
OFF
ON
OFF
ON
OFF
3. Harmonic
5. Harmonic
0.05..2.00 I/InO
0.00..60.00 sec; ∞
0.5..12.0 I/InO; ∞
0.00..60.00 sec; ∞
0.10..0.50
0.00..2.00 I/InO
0.25..0.95
0.00..10.00 I/InO
0.00..2.00 I/InO
1.0..2.0
0.0..180.0 sec
2.00..15.00 I/InO
2..250 Cycle; ∞
10..80 %
10..80 %
2..1000 Cycle; 0; ∞
Differential Protection (ANSI 87G/87M/87T)
Default Setting
OFF Differential Protection
OFF Increase of Trip Char. During
Start
ON Inrush with 2. Harmonic Res-
traint
OFF n-th Harmonic Restraint
0.20 I/InO Pickup Value of Differential Curr.
0.00 sec T I-DIFF> Time Delay
7.5 I/InO Pickup Value of High Set Trip
0.00 sec T I-DIFF>> Time Delay
0.25 Slope 1 of Tripping Characteri-
stic
0.00 I/InO Base Point for Slope 1 of Cha-
rac.
0.50 Slope 2 of Tripping Characteri-
stic
2.50 I/InO Base Point for Slope 2 of Cha-
rac.
0.10 I/InO I-RESTRAINT for Start Detec-
tion
1.0 Factor for Increasing of Char. at
Start
5.0 sec Maximum Permissible Starting
Time
4.00 I/InO Pickup for Add-on Stabilization
15 Cycle Duration of Add-on Stabilization
15 % 2nd Harmonic Content in I-DIFF
3 Cycle Time for Cross-blocking 2nd
Harm.
30 % n-th Harmonic Content in I-DIFF
0 Cycle Time for Cross-blocking n-th
Harm.
Comments
95