ABB | SACE Emax 2
44 | © 2013
ABB |
1SDH001000R0002 - L7804
Ekip Dip protection release | 2 - Protections
Summary table of protections
ABB
ANSI
(5)
Threshold
(1)
Threshold tolerance
(3)
Time
(1)
Calculation
formula t
t
(2)
Example
calculation t
t
(2)
Tolerance t
t
(3)
L
49
I1 =
0.4…1 In
activation for If in the
range (1.05...1.2) x I1
t1 =
3…144 s
t
t
=
(9 t1) / (If / I1)
2
t
t
= 6.75 s with:
I1 = 0.4 In; t1 = 3
s; If = 0.8 In
± 10 % with If
≤
6 In
± 20 % with If > 6 In
S
(t = k)
50 TD
I2 =
0.6...10 In
± 7 % with I2
≤
6 In
± 10 % with I2 > 6 In
t2 =
0.1…0.8 s
t
t
= t2
-
The better of the
two values:
± 10 % or ± 40 ms
S
(t = k /
l
2
)
51
I2 =
0.6...10 In
± 7 % with I2
≤
6 In
± 10 % with I2 > 6 In
t2 =
0.1…0.8 s
t
t
=
(100 t2) / (If)
2
t
t
= 5 s con:
I2 = 1 In; t2 = 0.8
s; If = 4 In
± 15 % with If
≤
6 In
± 20 % with If > 6 In
I
50
I3 =
1.5...15 In
± 10 %
Not
adjustable
t
t
≤
30 ms
-
-
G
(t = k)
50N
TD
I4
(4)
=
0.1...1 In
± 7 %
t4 =
0.1…0.8 s
t
t
= t4
-
The better of the
two values:
± 10 % or ± 40 ms
G
(t = k /
l
2
)
51N
I4
(4)
=
0.1...1 In
± 7 %
t4 =
0.1…0.8 s
t
t
=
2 / (If / I4)
2
t
t
= 0.32 s with:
I4 = 0.8 In; t4 =
0.2 s; If = 2 In
± 15 %
Iinst
-
Defined by
ABB
-
Instantaneous -
-
-
(1)
See the serigraph for the available combinations.
(2)
The calculation of t
t
is valid for values of If that have exceeded the activation threshold of the protection.
(3)
Tolerances valid with release energized in service conditions or with the auxiliary; tripping time
≥
100 ms, temperature and currents within operating
limits. If the conditions are not guaranteed, the tolerances in the table shown below apply.
(4)
In the presence of an auxiliary power supply all the thresholds are active. If the auxiliary power supply is not present, the minimum threshold is
automatically limited to the higher value between 100 A and 0.3 In
(5)
ANSI / IEEE C37-2 encoding.
Key
• (t=k) - Fixed time curve.
•
(t=k/I
2
)
- Dynamic time curve.
•
t
t
- Tripping time.
•
If
- Primary fault current.
Tolerances in particular cases
If the conditions defined in point
(3)
of the above table are not guaranteed, the following tolerances apply:
Protection
Threshold Tolerance
Tolerance t
t
L
activation for If in the range (1.05...1.2) x I1
± 20 %
S
± 10 %
± 20 %
I
± 15 %
≤
60 ms
G
± 15 %
± 20 %
