Page 96 - Sace Emax 2 Manual for design engineers

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Additional protections Protection Trip threshold
[ANSI code] Trip time t t (1) tolerance (3) Trip time tolerance
t = t41 ( with curve t = k ) The best between ± 10% and 40 ms
t
Gext
[50GTD / 51G] ± 7 % ± 15 %

2
(with curve t = k / I )
Rc 140 ms @ 0,06 s (9)
[64 50N TD 87N] t = tdn -20 % ÷ 0 950 ms @ 0,8 s (9)
t
t = k The best between ± 10% and 40 ms
MDGF ± 7 %
t = k / l 2 ± 15 %

Startup
Protection Trip time t (1) Trip threshold Trip time tolerance
[ANSI code] t tolerance (3)
Gext StartUp t = t41 startup ± 7 % the best between: ± 10 % and ± 40 ms
t

Note on protections (1) use trip and threshold current values expressed in In for calculating t (example: If = 0.8 In, I1= 0.6 In)
t
(2) with t4 = instantaneous, the maximum tolerance is 50 ms
(3) Tolerance values valid with Trip unit at steady state or on with auxiliary power supply, trip time ≥ 100 ms,
temperature and signals within operating limits; the tolerances in the table after the notes are applicable if the
conditions are not guaranteed
(4) the trip unit considers a 3% hysteresis for clearing from the alarm condition
(5) tolerance valid for frequencies within range: fn ± 2 %. A ± 5% tolerance is applicable for off range
frequencies
(6) ± 20% for threshold 0.4 Hz / s
(9) maximum trip time
(10) with If ≥ 18 kA, t ≤ 3 ms;
t
with 18 kA > If ≥ I31 * 3, t ≤ 7 ms (If three-phase) or t ≤ 9 ms (If single-phase);
t t
with If < 18 kA and If < I31 * 3, t ≤ 15 ms.
t
(operating parameters guaranteed with Vaux auxiliary power supply)
(11) tolerance valid with threshold U14 > 10%; with U14 ≤ 10% (and >6%), the tolerance is 10%; with U14 <
5%, the tolerance is 15%
Performance guaranteed in all operating conditions
Protection Trip threshold tolerance Trip time tolerance
L Activation within range: (1.05 to 1.2) x I1 ± 20 %
S ± 10 % ± 20 %
I / 2I ± 15 % ≤ 60 ms
G ± 15 % ± 20 % (60 ms with t4 = instantaneous)
Gext ± 15 % ± 20 %
MDGF ± 15 % ± 20 %
UF / UF2 / ± 2 % ± 20 %
OF / OF2
± 20 %; in the case of single-phase self-supply:
RV ± 10 %
the highest between ± 20 % and 30 ms
Other -- ± 20 %

94 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Protections | 11 - Performance table