VAMP 265 - 2. Protection Functions

2.1 Maximum number of protection
stages in one application
2 Protection functions
Technical description
46
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VM265.EN011
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 of the type of the stages. For more
information, please see the configuration instructions in
chapter 2.4 in the first part of this manual.
2.2. List of protection functions
IEEE/
ANSI code
IEC symbol
Function name
50/51
3I>, 3I>>, 3I‟>,
3I‟>>
Overcurrent protection
87
∆I>, ∆I>>
Differential overcurrent protection
46
I
2
>, I‟
2
>
Current unbalance protection
49
T>
Thermal overload protection
50N/51N
I
0
>,
I
0
>>,
I
0
>>>,
I
0
>>>>
Earth fault protection
50BF
CBFP
Circuit-breaker failure protection
99
Prg1...8
Programmable stages
50ARC
50NARC
ArcI>, ArcI‟>
ArcI
01
>, ArcI
02
>
Optional arc fault protection