Rocof Protections; Adaptive Protections - ABB SACE Emax 2 Manual

Continued from the previous page
Summary table of additional functions in conjunction with protections D and UP:
ABB ANSI Threshold
(7)
UP (Startup)
(10)
I7startup Fw/Bw = 0,6...10 In
D (Startup)
step = 0,1 In
D (SdZ) 68 -
(10)
UP protection startup should be considered as the temporary deactivation time of the protection, from the point in which the startup threshold is
exceeded

7 - ROCOF protections

Description
The ROCOF Protection package includes the protection of the same name and is available by default for Ekip G Hi-Touch; it can be configured in
the remaining models as additional SW package
ROCOF Protection protects against rapid frequency variations and has the following additional functions: Trip Enable, Trip Direction and Block.
Further details about the protections are given in document 1SDH001330R1002.
Summary table
ABB ANSI Threshold
(3)
f28 = 0,4...10 Hz / s
ROCOF 81R
(4)
step = 0,2 Hz / s
(1)
calculation of t is valid for values which have exceeded the trip threshold of the protection
t
(2) tolerance values valid with Trip unit supplied at full rate or by auxiliary power supply, trip time ≥ 100 ms, temperature and current values within
operating limits; the tolerance value becomes ± 20% if the conditions are not guaranteed
(3)
ANSI / IEEE C37-2 codification
(4)
not active for voltage values < 30 V
(5)
± 20% for threshold 0.4 Hz / s

8 - Adaptive protections

Description
The Adaptive Protection package includes the Double Set protection and is available by default for Ekip G Hi-Touch; it can be configured in the
remaining models as additional SW package
The Double Set function enables two different protection configurations to be made, one as an alternative to the other, by means of a set change
with programmable events.
Parameters
The function can be activated and the Set of the main protections configured in the Settings - Double Set menu; the event that determines Set
change (from main to secondary) can be programmed in the Advanced - Functions menu.
36 | © 2019 ABB | 1SDH001316R1002 - ECN000086501 - Rev. A
Tolerance
Time
threshold
t23startup= 0,1...30 s, step
= 0,01 s
t7startup = 0,1...30 s step =
± 10 %
0,01 s
t7SdZ Fw/Bw = 0,1...0,8 s
-
step = 0,01 s
Tolerance
Time
threshold
± 10 % t28 = 0,06...300 s step = 0,01 s
(5)
ABB | SACE Emax 2
Calculation
Tolerance t
formula t
(5)
t
The better of the two
tt = t7startup values: ± 10 % or ± 40
ms
Calculation
Tolerance t
formula t
(1)
t
The best of the two
t = t28
values: ± 20% or 200 ms
t
Protections | 8 - Adaptive protections
(6)
t
(2)
t