ABB SACE Tmax XT7 Operation And Maintenance Manual page 91

ROCOF Protection
Motor protections
Additional protections
89 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
Protection
Trip time t
[ANSI code]
ROCOF [81R] t = t28
t
Protection
Trip time t
[ANSI code]
R JAM [51LR] t = tj
t
R STALL [51LR] t = ts
t
UC [37] t = tuc
t
U t = tu
(8)
t
Protection
Trip time t
[ANSI code]
t = t41
t
(with curve t = k)
Gext
[50GTD / 51G]
(with curve t = k / I
Rc
t = tdn
[64 50N TD 87N]
t
t = t41
t
(with curve t = k)
MDGF
(with curve t = k / I
Startup
Protection
Trip time t
[ANSI code]
Gext StartUp t = t41 startup
t
MDGF StartUp t = t41 startup
t
Trip threshold
Trip time tolerance
tolerance
(3)
t
± 10 % the best between ± 20% and 200 ms
(6)
Trip threshold
Trip time tolerance
tolerance
(3)
t
± 10 % with If ≤ 6 In: ± 7 % / with If > 6 In: ± 10 %
± 10 % ± 10 %
± 15 % ± 20 %
± 15 % ± 20 %
Trip threshold
(1)
tolerance
(3)
t
± 7 %
)
2
-20 % ÷ 0
± 7 %
)
2
Trip threshold
Trip time tolerance
(1)
tolerance
(3)
t
± 7 % the best between: ± 10 % and ± 40 ms
± 7 % the best between: ± 10 % and ± 40 ms
ABB | SACE Tmax XT
Trip time tolerance
The best between ± 10% and 40 ms
± 15 %
140 ms @ 0,06 s
(9)
950 ms @ 0,8 s
(9)
The best between ± 10% and 40 ms
± 15 %
Protections | 17 - Performance table