ABB RELION REX640 Technical Manual page 192

Basic functions
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
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
include sampling, processing and network delay.
Frequency adaptive measurements for a three-phase current can be activated with
the setting
Table 117: Frequency adaptivity setting for three-phase current measurement
Setting value
Disable
Enable
Backup frequency source
3.17.1.4 Signals
ILTCTR Input signals
Table 118: ILTCTR Input signals
Name
IL1
IL2
IL3
192
SMV Max Delay setting defines how long the receiver waits for the SMV
Frequency adaptivity . Three selections are provided.
All three phases must be always connected.
ILTCTR setting
Configuration > System > Frequency adaptivity is set to "Enable".
Type
SIGNAL
SIGNAL
SIGNAL
Description
Frequency adaptive measurements are disabled for this
ILTCTR. Measurements are fixed to nominal frequency de-
fined with Configuration > System > Rated frequency.
Frequency adaptive measurements are enabled. In this case,
the estimated network frequency is defined by another pre-
processing block.
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.
Frequency adaptivity is visible only if the system setting
Default
-
-
-
1MRS759142 F
SMV Max Delay values
Description
Analog input
Analog input
Analog input
REX640
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