Page 36 - ACB-E1.2-E2.2-E4.2-E6.2

ABB | SACE Emax 2
ABB | SA CE Ema x 2
5 - Frequency protections

List
The Frequency protections, available by default for Ekip Hi-Touch, Ekip G Touch, Ekip G-Hi Touch models and configurable in the remaining
models as additional SW package, are:
Name Type of protection Threshold Time Additional functions (2)
UF Minimum frequency Trip enable, Block
OF Maximum frequency Trip enable, Block
UF2 (1) Minimum frequency Trip enable, Block
OF2 (1) Maximum frequency Trip enable, Block

Further details about the protections are given in document 1SDH001330R1002.

(1) protections UF2 and OF2 are not available by default with Ekip G Touch. However, they can be integrated by requesting the relative SW
package
(2) Block configuration available via Ekip Connect

Summary table
Calculation
Tolerance
ABB ANSI (5) Threshold (7)(8) Time formula t Tolerance t (4)
threshold (3) t
t
The best of the two values: ± 10 % (min = 30 ms) or ±
f12 = 0,9...1 fn t12 = 0,06...300 s
UF (6) 81L ± 1 % (7) t = t12 40 ms (for set time < 5 s) / ± 100 ms (for set time ≥ 5
Step = 0,001 fn Step = 0,01 s t
s)
f13 = 1...1,1 fn t13 = 0,06...300 s The best of the two values: ± 10% or ± 40 ms (for set
OF (6) 81H ± 1 % (7) t = t13
Step = 0,001 fn Step = 0,01 s t time < 5 s) / ± 100 ms (for set time ≥ 5 s)
The best of the two values: ± 10 % (min = 30 ms) or ±
f17 = 0,9...1 fn t17 = 0,06...300 s
UF2 (6) 81L ± 1 % (7) t = t17 40 ms (for set time < 5 s) / ± 100 ms (for set time ≥ 5
Step = 0,001 fn Step = 0,01 s t
s)
f18 = 1...1,1 fn t18 = 0,06...300 s The best of the two values: ± 10% or ± 40 ms (for set
OF2 (6) 81H ± 1 % (7) t = t18
Step = 0,001 fn Step = 0,01 s t time < 5 s) / ± 100 ms (for set time ≥ 5 s)
(3) calculation of t is valid for values which have exceeded the trip threshold of the protection
t
(4) 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 is ± 20% if the conditions are not guaranteed
(5) ANSI / IEEE C37-2 codification
(6) the protection excludes itself if the maximum value of the line-to-line voltage is less than 32 V with hysteresis at 36 V
(7) tolerance valid for frequencies within range: fn ± 2%; a ± 5% tolerance is available for off range frequencies

34 | © 2022 ABB | 1SDH001316R1002 - ECN000232533 Protections