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User Manual LineTroll R400D
Transient (temporary) faults
If the fault is cleared by the automatic re-
closing cycle and the line returns back to
normal service, a single green LED will
flash for a configurable time (2 hours
–
48
hours). During this period the indicator is
ready to detect new faults. If the new fault
is a permanent fault, the indicator will start
indicating the permanent fault.
4.3 Automatic reclosing
An automatic reclosing will not activate a non-flashing indicator.
If the indicator is indicating a previous fault, the operation due to a reclosing depends on
whether the reclosing is successful or not.
Non-successful reclosing
Closing a breaker onto a fault leads to
another trip almost instantly. When the
indicator already indicates a fault, it needs
to see an energized line for more than a
configurable time before it resets the
indication. The time can be set from 5
second to 30 seconds).
t
t
LINE
< 30 s
I
Successful reclosing
The voltage reset feature must be switched ON if the indicator shall reset upon re-energizing
of the feeder. The reset time is configurable. (5 to 30 sec)
4.4 Fused lines
When the circuit breaker trip criteria are switched ON, a three-phase disconnection of the line
is required before the indicator starts indicating the fault.
If only one or two of the three phases are disconnected by the fuses due to a fault, the
indicator will be reset from the remaining not-disconnected phase and no indication will start.
When the circuit breaker trip criteria are switched OFF, the indicator function will depend on
another setting; voltage reset.
If the voltage reset is ON, the indicator will be reset after 5-30sec and the message sent to
the control center will be Transient Fault. The local indication will be with the green LED
flashing for a configurable time.
If the voltage reset is OFF, the indicator will start a permanent fault indication and will be
reset only by the timer, manually or command sent from the control center. The indicator will
report the fault as a permanent fault to the control center.
Fast Auto
Reclosing
Fault
15/30 sec
SMS with ’Transient
Fault’
Transient Fault
