VAMP Ltd
Over-, under-, residual voltage and
frequency relay
Technical description
VAMP 135
VM135.EN008 VAMP 24h support phone : +358 (0)20 753 3264
19
Available links
The following channels can be linked to Disturbance Recorder:
•
U12, U23, U31, Uline
•
UL1, UL2, UL3
•
U
0
, U2/Un
•
f
•
DI, DO
Parameters of the Disturbance Recorder
Parameter
ParameterParameter
Parameter
Value/unit
Value/unitValue/unit
Value/unit
Mode Mode of the recording
Rate Sample rate
Time s Recording time
PreTrig % Pre-trigger time
MnlTrig Manual trig
Size Size of one recording
MAX time s Maximum time of recordings
Setting
values
MAX size Maximum size of recordings
Links Connected links
AddLink Add links
Recorder
links
ClrLnks Clear links
Status Status of the recorder
Time status
% Status of the pre-triggering
Recorded
values
ReadyRec Number of ready records
2.8. Self-supervision
The functions of the micro controller and the associated
circuitry as well as the program execution are supervised by
means of a separate watchdog circuit. Besides supervising the
relay the watchdog circuit attempts to restart the micro
controller in a fault situation. If the restarting fails the
watchdog issues a self-supervision alarm because of a
permanent relay fault.
When the watchdog circuit detects a permanent fault it always
blocks any control of the other output relays, except for the self-
supervision output relay.
Also the internal supply voltage is supervised. Should the
auxiliary supply of the relay disappear, an IF alarm is
automatically given. The IF relay contact is normally closed
type of contact. This means that the IF relay contact is closed,
when there is an internal fault or there is no auxiliary power
supply. If the relay is fully operational with the auxiliary power
supply, the IF contact is on the open position.
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