Summary Table Of Protections - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

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 =
51
(t = k / l ) 0.6...10 In
2
I3 =
I 50
1.5...15 In
G I4 =
(4)
50N TD
(t = k) 0.1...1 In
G I4 =
(4)
51N
(t = k / l ) 0.1...1 In
2
Defined by
Iinst -
ABB
(1)
See the serigraph for the available combinations.
(2)
t calculation is valid for If values that have exceeded the trip threshold of the protection. Use fault current and threshold values expressed in In to
t
calculate t , as shown in the example.
t
(3) Tolerances valid with trip unit energized in service conditions or with the auxiliary; tripping time ≥ 100 ms, temperature and currents within operating
limits. If these conditions are not guaranteed, the tolerances in the table shown below apply.
(4)
In the presence of auxiliary power supply, you can select all the thresholds. In self-supply mode the minimum threshold is limited to: 0.3 In (with In
= 100 A), 0.25 In (with In = 400 A) or 0.2 In (for all other sizes).
(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 Tolerance threshold
L Activation for If in the range (1.05...1.2) x I1
S
± 10 %
I ± 15 %
G ± 15 %
26 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Threshold
(1)
tolerance (3)
activation for If in the
range (1.05...1.2) x I1
± 7 % with If ≤ 6 In
± 10 % with If > 6 In
± 7 % with If ≤ 6 In
± 10 % with If > 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)
2
Not adjustable t ≤ 30 ms
t
t4 =
t = t4
0.1...0.8 s
t
t4 = t =
t
0.1...0.8 s 2 / (If / I4)
2
Instantaneous -
Calculation
example t (2)
t
t = 6.75 s with:
t
I1 = 0.4 In; t1 = 3 s; If
2
= 0.8 In
-
t = 5 s con:
t
I2 = 1 In; t2 = 0.8 s;
If = 4 In
-
-
t = 0.32 s with:
t
I4 = 0.8 In; t4 = 0.2 s;
If = 2 In
-
Tolerance t
t
± 20 %
± 20 %
≤ 60 ms
± 20 %
Ekip Dip protection trip unit | 2 - Protections
ABB | SACE Emax 2
Tolerance t
(3)
t
± 10 % with If ≤ 6 In
± 20 % with If > 6 In
The better of the two
values:
± 10 % or ± 40 ms
± 15 % with If ≤ 6 In
± 20 % with If > 6 In
-
The better of the two
values:
± 10 % or ± 40 ms
± 15 %
-