ABB SACE Emax E2.2 Installation, Operation And Maintenance Instructions For The Installer And The User page 44

Summary table of protections
ABB ANSI (5) Threshold
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 %
42 | © 2019 ABB | 1SDH001000R0002 - ECN000109166 - Rev. D
Threshold
(1) Time
tolerance
(3)
activation for If in the
t1 =
range (1.05...1.2)
3...144 s
x I1
± 7 % with If ≤ 6 In
t2 =
± 10 % with If > 6 In 0.1...0.8 s
± 7 % with If ≤ 6 In
t2 =
± 10 % with If > 6 In 0.1...0.8 s
± 10 % Not adjustable t
t4 =
± 7 %
0.1...0.8 s
t4 =
± 7 %
0.1...0.8 s
- Instantaneous -
of the above table are not guaranteed, the following tolerances apply:
(3)
Calculation
(1)
formula t
(2)
t
t =
t
(9 t1) / (If / I1)
2
t = t2
t
t =
t
(100 t2) / (If)
2
≤ 30 ms
t
t = t4
t
t =
t
2 / (If / I4)
2
Tolerance t
t
± 20 %
± 20 %
≤ 60 ms
± 20 %
ABB | SACE Emax 2
Calculation
Tolerance t
example t
(2)
t
t = 6.75 s with:
± 10 % with If ≤ 6 In
t
I1 = 0.4 In; t1 = 3 s;
± 20 % with If > 6 In
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 s;
± 20 % with If > 6 In
If = 4 In
- -
The better of the
- two values:
± 10 % or ± 40 ms
t = 0.32 s with:
t
I4 = 0.8 In; t4 = 0.2 ± 15 %
s; If = 2 In
- -
Ekip Dip | 4 - Protections
(3)
t