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Maximum Number of
Protection Stages
in one application
Protection Functions
Protection Functions
Each protection stage can independently be enabled or disabled
according to the requirements of the intended application.
The device limits the maximum number of enabled stages to about
30, depending of the type of the stages. For more information,
please see the configuration instructions under "Configuration and
Parameter Settings" on page 2-21 in Chapter 2.
Table 3.1 – List of Protection Functions
IEEE/ANSI
IEC Symbol
Code
50/51
3I>, 3I>>, 3I>>>
67
I
>, I
>>, I
>>>,
dir
dir
dir
I
>>>>
dir
46R
I
/I
>
2
1
46
I
>
2
47
I
>>
2
48
I
>
st
66
N>
37
I<
67N
I
>, I
>>
0 ϕ
0 ϕ
50N/51N
I
>, I
>>, I
>>>,
0
0
0
I
>>>>
0
67NT
I
0T
59N
U
>, U
>>
0
0
49
T>
59
U>, U>>, U>>>
27
U<, U<<, U<<<
32
P<, P<<
81H/81L
f><, f>><<
81L
f<, f<<
81R
df/dt
25
∆f, ∆U, ∆φ
50BF
CBFP
99
Prg1...8
50ARC/
ArcI>, ArcI
>,
01
ArcI
>
50NARC
02
Function Name
Overcurrent protection
Directional overcurrent protection
Broken line protection
Current unbalance protection
Phase reversal / incorrect phase sequence
protection
Stall protection
Frequent start protection
Undercurrent protection
Directional earth fault protection
Earth fault protection
Intermittent transient earth fault protection
Capacitor bank unbalance protection
Zero sequence voltage protection
Thermal overload protection
Overvoltage protection
Undervoltage protection
Reverse and underpower protection
Overfrequency and underfrequency
protection
Underfrequency protection
Rate of change of frequency (ROCOF)
protection
Synchrocheck
Circuit-breaker failure protection
Programmable stages
Optional arc fault protection
3
Chapter
Page
3-6
3-10
3-15
3-16
3-19
3-19
3-21
3-23
3-23
3-30
3-35
3-40
3-44
3-46
3-50
3-53
3-56
3-57
3-57
3-59
3-63
3-70
3-71
3-74
857-UM001A-EN-P – July 2009
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