ABB SACE Tmax XT7 Operation And Maintenance Manual page 92

Note on protections
90 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
(1)
use trip and threshold current values expressed in In for calculating 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
(7)
time to be considered valid after Motor start-up
(8)
time to be considered valid with protection in alarm status after Motor start-up; if the alarm appears during
Motor start-up, the trip unit calculates and uses the lowest value between tu and the half of Motor start-up
(9)
maximum trip time
(10) with If ≥ 18 kA, t ≤ 3 ms;
t
with If < 18 kA and If ≥ I31 * 3, t
with If < 18 kA and If < I31 * 3, 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
L Activation within range: (1.05 to 1.2) x I1
S ± 10 %
I / 2I ± 15 %
G ± 15 %
Gext ± 15 %
MDGF ± 15 %
UF / UF2 /
± 2 %
OF / OF2
RV ± 10 %
Other --
≤ 7 ms (If three-phase) or t ≤ 9 ms (If single-phase);
t t
≤ 15 ms.
t
Trip time tolerance
± 20 %
± 20 %
≤ 60 ms
± 20 % (60 ms with t4 = instantaneous)
± 20 %
± 20 %
± 20 %
± 20 %; in the case of single-phase self-supply:
the highest between ± 20 % and 30 ms
± 20 %
ABB | SACE Tmax XT
(example: If = 0.8 In, I1= 0.6 In)
t
Protections | 17 - Performance table