ABB SACE Emax 2 Series - Page 19

ABB | SACE Emax 2
Ekip Touch protection trip unit | 8 - Hi-Touch protections17 | © 2018 ABB | 1SDH001316R0002 - ECN000086018 - Rev. C
Continued from the previous page
The following table summarises the additional functions combined with protections S2 and D:
ABB
ANSI
(4)
Threshold
Threshold
tolerance
(2)
Time
(3)
Calculation
formula t
t
(1)
Tolerance t
t
(2)
S2
(Startup)
-
I5
startup
= 0.6...10 In
step = 0.1 In
± 7 % with If ≤ 6 In
± 10 % with If > 6 In
t5
startup
= 0.1…30 s
step = 0.01 s
t
t
= t5
startup
The better of the two
values:
± 10 % or ± 40 ms
S2
(Sdz)
68 - -
t2
sdz
= 0.04…0.2 s
step = 0.01 s
- -
D
(Startup)
-
I7
startup
= 0.6...10 In
step = 0.1 In
± 10 %
t7
startup
= 0.1…30 s
step = 0.01 s
t
t
= t7
startup
The better of the two
values:
± 10 % or ± 40 ms
D
(SdZ)
68 - -
t7
SdZ
= 0.1…0.8 s
step = 0.01 s
- -
(1)
Calculation of t
t
is valid for values exceeding the tripping threshold of the protection.
(2)
Valid tolerances with steady-state energized trip unit or trip unit energized by auxiliary power supply, tripping time ≥ 100 ms, temperature and
currents within operating limits. If these conditions are not guaranteed, the tripping time tolerance of ± 10 % will become ± 20%.
(3)
For the startup functions, the specified time is the period during which the protection with the different threshold remains active, calculated from the
moment the startup threshold is exceeded.
(4)
ANSI / IEEE C37-2 encoding.
(5)
Valid tolerance for frequencies in the range: fn ± 2 %. For frequency outside the range a tolerance of ± 5 % applies.