VAMP Ltd
Feeder and motor manager
Technical description
VAMP 257
VM257.EN002
VAMP 24h support phone : +358 (0)20 753 3264
145
5.3.9.
Synchrocheck function
Sync mode
Off; ASync; Sync;
Voltage check mode
DD;DL;LD;DD/DL;DD/LD;DL/LD;DD/DL/LD
CB closing time
0.04 – 0.6 s
U
dead
limit setting
10 – 120 % U
n
U
live
limit setting
10 – 120 % U
n
Frequency difference
0.01 – 1.00 Hz
Voltage difference
1 – 60 % U
n
Phase angle difference
2 – 90 deg
Request timeout
0.1 – 600.0 s
Frequency measuring range
46.0 - 70.0 Hz
Reset ratio (U)
0.97
Inaccuracy:
- voltage
±3 % U
n
- frequency
±20 mHz
- phase angle
±2 deg
- operating time
±1% or ±30 ms
5.3.10.
Circuit-breaker failure protection
Circuit-breaker failure protection CBFP (50BF)
Relay to be supervised
T1, T2, T3, T4, T5, T6, T7 and T8
Definite time function
- Operating time
0.1** – 10.0 s (step 0.1 s)
Inaccuracy
- Operating time
±100 ms
**) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
5.3.11.
Arc fault protection stages (option)
The operation of the arc protection depends on the setting value of the
ArcI>, ArcI
0
> and ArcI
02
> current limits. The arc current limits cannot be
set, unless the manager is provided with the optional arc protection card.
Arc protection stage ArcI> (50AR), option
Setting range
0.5 - 10.0 x I
n
Arc sensor connection
S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
Operating time
~15 ms
Arc protection stage ArcI
0
> (50AR), option
Setting range
0.05 – 1.00 x I
0n
Arc sensor connection
S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
Operating time
~15 ms
Arc protection stage ArcI
02
> (50AR), option
Setting range
0.05 – 1.00 x I
02n
Arc sensor connection
S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
Operating time
~15 ms
