Tx Trip Duration Monitoring; Rx Output Command Duration; Rx Output Command Prolongation; Rx Trip Duration Monitoring - ABB ETL600 Instruction Manual

ETL600
3.6.8.6.4.

Tx Trip Duration Monitoring

The duration of each single command injected at the relay interface
inputs is separately and continuously monitored.
Alarm is given and the guard signal is transmitted instead of the
tripping signal should the command duration exceed a predefined
value (5 seconds per default, programmable via HMI600 in the range
of 1 to 60 seconds). Also the boost criterion is set inactive and the
interrupted speech and data channels are re-connected again.
Note:
3.6.8.6.5.

Rx Output Command Duration

Via the HMI600 the user can choose between "Rx Output Duration"
and "Rx Output Prolongation". The setting is then applicable for all
commands in common. It decides whether the commands shall be
signaled for a fixed (limited) duration only at the outputs or whether the
commands are actuated as long at the outputs as they are received
(with a certain prolongation, if required; refer to section 3.6.8.6.6). The
latter is the default setting.
If this feature is enabled, the Rx output command duration can be set
in the range of 30 to 1000 ms (step 1 ms; default 100 ms) individually
for each command. This means that the command signal at the
corresponding G4AI output will have a constant duration, independent
of the length of the received tripping signal.
3.6.8.6.6.

Rx Output Command Prolongation

A Rx output command prolongation ensures steady commands at the
G4AI outputs even in the event of discontinuations of the tripping
signal being received at the RF input.
If this feature is enabled, a Rx output command prolongation can be
programmed for each command separately in the range of 0 ms to 3
seconds. The default setting depends on the chosen application of the
command (blocking: 0 ms, permissive tripping: 10 ms, direct tripping:
100 ms).
The receiver of the NSD600 compensates the command duration
without prolongation for almost equal pulse width as the transmitted
command at the remote station.
3.6.8.6.7.

Rx Trip Duration Monitoring

Monitoring is programmable ON/OFF for each Rx command, i.e. a
limitation of the command duration at the receiver site can also be
enabled (default setting = OFF).
The duration of each single command received and relayed to the
relay interface output(s) is separately and continuously monitored (if
the Rx trip duration alarm is enabled for this command).
Structure and Function
1KHW001489-EN
If commands of long duration are to be transferred,
certain rules regarding the setting of the pick-up
times for the link and user alarms have to be
observed (please refer to Chapter 5 for details).
November 2005
ABB Switzerland Ltd
3-79