VAMP 52 - 2. Protection functions; 2.1. Maximum number of protection stages in one application; 2.2. List of protection functions

2.1 Maximum number of protection
stages in one application
2 Protection functions Technical description
44
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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 Operation and Configuration instruction.
2.2. List of protection functions
IEEE/ANSI
code
IEC symbol Function name Note
50/51
3I>, 3I>>, 3I>>> Overcurrent protection
46R
I
2
/I
1
> Broken conductor protection
46 I
2
> Current unbalance protection Only VAMP 51/52
47 I
2
>>
Phase reversal / incorrect
phase sequence protection
48 I
st
> Stall protection
66
N> Frequent start protection
Only VAMP52
available when
application option is
in motor protection
mode.
49 T> Thermal overload protection
37 I< Undercurrent protection Only VAMP52
50N/51N
I
0
>, I
0
>>, I
0
>>>,
I
0
>>>>
Earth fault protection
67NT
I
0t
> Intermittent transient earth
fault protection
67N





Directional earth fault
protection
59N
U
0
>, U
0
>> zero sequence voltage
protection
Only VAMP52
available when
measurement option
is Uo
59
U>, U>>, U>>> Single-phase overvoltage
protection
27
U<, U<<, U<<< Single-phase undervoltage
protection
Only VAMP 52
available when
measurement option
is 1LL (line-to-line
voltage) or 1LN
(phase-to-neutral
voltage).
51F2 I
f2
> Second harmonic O/C stage
50BF
CBFP Circuit-breaker failure
protection
99 Prg1...8 Programmable stages Only VAMP51/52
50ARC/
50NARC
ArcI>, ArcI
01
> Optional arc fault protection
(with an external module)