VAMP 135
Over-, under-, residual voltage and
frequency relay
Technical description
VAMP Ltd
34
VAMP 24h support phone : +358 (0)20 753 3264
VM135.EN008
5.3.4.
Overfrequency protection
Overfrequency and underfrequency protection stages f><
and f>><<(81)
Overfrequency measuring range
46.0 – 70.0 Hz
Definite time function:
-operating time
0.10* - 300.0 s (step 0.02 s)
Starting time
<100 ms
Resetting time
<100 ms
Resetting ratio
0.998
Accuracy:
- starting
±20 mHz
- operating time
±1% or ±30 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.
5.3.5.
Underfrequency protection
Underfrequency stage f< and f<< (81L)
Underfrequency measuring range
40.0 – 64.0 Hz
Definite time function:
-operating time
0.10* - 300.0 s (step 0.02 s)
Undervoltage blocking
2 - 100 %
Starting time
<60 ms
Resetting time
<60 ms
Resetting ratio
0.97
Accuracy:
- starting
±20 mHz
- operating time
±1% or ±30 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.
5.4.
Disturbance Recorder (DR)
The operation of Disturbance recorder depends on the following settings.
The recording time and number of records depend on the time setting and
number of selected channels.
Disturbance recorder (DR)
Mode of recording:
Saturated / Overflow
Sample rate:
- waveform recording
- trend curve recording
16/cycle, 8/cycle
10, 20, 200 ms
1, 5, 10, 15, 30 s
1 min
Recording time (one record)
0.1 s – 12 000 min
(must be shorter than MAX time)
Pre trigger rate
0 – 100%
Number of selected channels
0 – 12
