Differential Protection (ANSI 87G/87M/87T)
95
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.
2.12.2.3 Settings of the Differential Protection
Addr.
Setting Title
Setting Options
Default Setting
Comments
2001
DIFF. PROT.
OFF
ON
Block relay for trip com-
mands
OFF
Differential Protection
2005
INC.CHAR.START
OFF
ON
OFF
Increase of Trip Char. During
Start
2006
INRUSH 2.HARM.
OFF
ON
ON
Inrush with 2. Harmonic Res-
traint
2007
RESTR. n.HARM.
OFF
3. Harmonic
5. Harmonic
OFF
n-th Harmonic Restraint
2021
I-DIFF>
0.05..2.00 I/InO
0.20 I/InO
Pickup Value of Differential Curr.
2026A
T I-DIFF>
0.00..60.00 sec;
∞
0.00 sec
T I-DIFF> Time Delay
2031
I-DIFF>>
0.5..12.0 I/InO;
∞
7.5 I/InO
Pickup Value of High Set Trip
2036A
T I-DIFF>>
0.00..60.00 sec;
∞
0.00 sec
T I-DIFF>> Time Delay
2041A
SLOPE 1
0.10..0.50
0.25
Slope 1 of Tripping Characteri-
stic
2042A
BASE POINT 1
0.00..2.00 I/InO
0.00 I/InO
Base Point for Slope 1 of Cha-
rac.
2043A
SLOPE 2
0.25..0.95
0.50
Slope 2 of Tripping Characteri-
stic
2044A
BASE POINT 2
0.00..10.00 I/InO
2.50 I/InO
Base Point for Slope 2 of Cha-
rac.
2051A
I-REST. STARTUP
0.00..2.00 I/InO
0.10 I/InO
I-RESTRAINT for Start Detec-
tion
2052A
START-FACTOR
1.0..2.0
1.0
Factor for Increasing of Char. at
Start
2053
T START MAX
0.0..180.0 sec
5.0 sec
Maximum Permissible Starting
Time
2056A
I-ADD ON STAB.
2.00..15.00 I/InO
4.00 I/InO
Pickup for Add-on Stabilization
2057A
T ADD ON-STAB.
2..250 Cycle;
∞
15 Cycle
Duration of Add-on Stabilization
2061
2. HARMONIC
10..80 %
15 %
2nd Harmonic Content in I-DIFF
2062A
CROSSB. 2. HARM
2..1000 Cycle; 0;
∞
3 Cycle
Time for Cross-blocking 2nd
Harm.
2071
n. HARMONIC
10..80 %
30 %
n-th Harmonic Content in I-DIFF
2072A
CROSSB. n.HARM
2..1000 Cycle; 0;
∞
0 Cycle
Time for Cross-blocking n-th
Harm.