The WARNING output in the receiver is activated if the synchronization accuracy of
the sender or the receiver is worse than 4 μs. The output remains on for 10 seconds
after the synchronization accuracy returns within limits.
The ALARM in the receiver is activated if the synchronization accuracy of the sender
or the receiver is not within tolerances. The output is held on for 10 seconds after
the synchronization accuracy returns within limits. If the effect on protection is
negligible, the WARNING or ALARM output is not activated.
The
SMV Max Delay
setting defines how long the receiver waits for the SMV
frames before activating the ALARM output. This setting can be accessed via
Configuration> System. Waiting for the SMV frames delays the local measurements
of the receiver to keep them correctly time aligned. The
SMV Max Delay
values
include sampling, processing and network delay.
Frequency adaptive measurements for a three-phase current can be activated with
the setting
Frequency adaptivity
. Three selections are provided.
Table 117: Frequency adaptivity setting for three-phase current measurement
Setting value Description
Disable Frequency adaptive measurements are disabled for this
ILTCTR. Measurements are fixed to nominal frequency de-
fined with Configuration> System> Rated frequency.
Enable Frequency adaptive measurements are enabled. In this case,
the estimated network frequency is defined by another pre-
processing block.
Backup frequency source Frequency adaptive measurements are enabled. If the main
frequency source cannot determine the network frequency,
the currents of the preprocessing block determine the net-
work frequency.
All three phases must be always connected.
ILTCTR setting
Frequency adaptivity
is visible only if the system setting
Configuration> System> Frequency adaptivity is set to "Enable".
3.17.1.4 Signals
ILTCTR Input signals
Table 118: ILTCTR Input signals
Name
Type Default Description
IL1 SIGNAL - Analog input
IL2 SIGNAL - Analog input
IL3 SIGNAL - Analog input
Basic functions 1MRS759142 F
192 REX640
Technical Manual
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