Summary Table Of Protections - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Summary table of protections

ABB ANSI Threshold
(5)
I1 =
L 49
0.4...1 In
S I2 =
50 TD
(t = k) 0.6...10 In
S
I2 =
(t = k / 51
0.6...10 In
l )
2
I3 =
I 50
1.5...15 In
G 50N I4 =
(4)
(t = k) TD 0.1...1 In
G
I4 =
(4)
(t = k / 51N
0.1...1 In
l )
2
Defined by
Iinst
-
ABB
(1)
See the serigraph for the available combinations.
(2)
The calculation of t is valid for values of If that have exceeded the activation threshold of the protection.
t
(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 ) - Dynamic time curve.
2
• t - Tripping time.
t
• If - Primary fault current.
Tolerances in particular cases
If the conditions defined in point
Protection Threshold Tolerance
L activation for If in the range (1.05...1.2) x I1
S ± 10 %
I ± 15 %
G ± 15 %
44 | © 2013 ABB | 1SDH001000R0002 - L7804
Threshold tolerance
(1)
(3)
activation for If in the
range (1.05...1.2) x I1
± 7 % with I2 ≤ 6 In
± 10 % with I2 > 6 In
± 7 % with I2 ≤ 6 In
± 10 % with I2 > 6 In
± 10 %
± 7 %
± 7 %
-
of the above table are not guaranteed, the following tolerances apply:
(3)
Calculation
Time
(1)
formula t
(2)
t
t1 = t =
t
3...144 s (9 t1) / (If / I1)
t2 =
t = t2
0.1...0.8 s
t
t2 = t =
t
0.1...0.8 s (100 t2) / (If)
Not
≤ 30 ms
t
adjustable
t
t4 =
t = t4
0.1...0.8 s
t
t4 = t =
t
0.1...0.8 s 2 / (If / I4)
2
Instantaneous -
Tolerance t
± 20 %
± 20 %
≤ 60 ms
± 20 %
Example
Tolerance t
calculation t
(2)
t
t = 6.75 s with:
± 10 % with If ≤ 6 In
t
I1 = 0.4 In; t1 = 3
± 20 % with If > 6 In
2
s; If = 0.8 In
The better of the
- two values:
± 10 % or ± 40 ms
t = 5 s con:
± 15 % with If ≤ 6 In
t
I2 = 1 In; t2 = 0.8
± 20 % with If > 6 In
2
s; If = 4 In
- -
The better of the
- two values:
± 10 % or ± 40 ms
t = 0.32 s with:
t
I4 = 0.8 In; t4 = ± 15 %
0.2 s; If = 2 In
- -
t
Ekip Dip protection release | 2 - Protections
ABB | SACE Emax 2
(3)
t