VAMP 59 - 2 Protection Functions; Maximum Number of Protection Stages in One Application; List of Protection Functions

2.1 Maximum number of
protection stages in one
application
2 Protection functions
Technical description
44
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VM59.EN001
2. Protection functions
Each protection stage can independently be enabled or disabled
according to the requirements of the intended application.
2.1. Maximum number of protection
stages in one application
The device limits the maximum number of enabled stages to
about 30, depending on the type of the stages. For more
information, please see the configuration instructions in
chapter 2.4 of the Operation and Configuration instruction.
2.2. List of protection functions
IEEE/ANSI
code
IEC symbol
Function name
87L
LdI>,
LdI>>
Line differential protection
87L
f2
Second harmonic blocking
87L
f5
Fifth harmonic blocking
50/51
3I>, 3I>>,
3I>>>
Overcurrent protection
50N/51N
I
0
>, I
0
>>,
I
0
>>>,
I
0
>>>>
Earth fault protection
49
T>
Thermal overload protection
50BF
CBFP
Circuit-breaker failure protection
46
I
2
>
Current unbalance protection
59N
U
0
>, U
0
>>
Zero sequence voltage protection
67N,
50N/51N





Directional or non directional.
earth-fault, low-set stage,
sensitive, definite or inverse time
79
AR
Auto-reclosing
99
Prg1…8
Programmable stages
51F2
I
f2
>
Second harmonic O/C stage
51F5
I
f5
>
Fifth harmonic O/C stage
50ARC/
50NARC
ArcI>,
ArcI
01
>
Optional arc fault protection (with
an external module)