Internal Teleprotection Equipment; Loop Test; Local Test Mode; Event Recorder And Command Counters - ABB ETL600 Instruction Manual

ETL600
•
Check that the external connections are correct as per plant
drawings.
9.4.1.

Internal teleprotection equipment

9.4.1.1.

Loop test

When in operation, the unit can be tested with the aid of the loop test.
The signal used for this test has the same parameters (security and
dependability) as the command configured for the application with the
highest requirements regarding security.
It can be initiated manually at any time by choosing the Equipment
menu, pointing to Commissioning and maintenance and clicking
NSD600 send looptest .
It can also be executed automatically every 1, 3, 6, 12 or 24 hours by
correspondingly configuring the NSD600 in its TPE tab.
9.4.1.2.

Local test mode

The NSD600 can be set to a local operating mode for checking the
relay interfaces, e.g. for measuring command prolongation. In this
operating mode, which is indicated by a warning message in the status
display and the warning LED on the P4LT module, the command input
signal is looped by the processor back to the command output of the
local teleprotection interface.
9.4.1.3.

Event Recorder and Command Counters

The integrated event recorder and the counters for each command
support investigations in case of faults or abnormal conditions in the
high voltage network. The event recorder can be synchronized to an
external GPS receiver for accurate time stamping in all the different
locations where ETL600 equipment is used. Therefore it is possible to
directly compare and analyze the logs of several ETL600/NSD600
devices in a network where a failure occurred. The display of events is
possible in text and graphical views on the HMI600.
Refer to section 3.7 for a detailed description of the event recorder.
9.5.

Frequently asked questions

Question: The 'Connect' operation is not successful. What can I do to
correct this problem?
Answer:
communication path, starting at the PC and ending at the equipment.
The section 'Communication to the ETL600' in chapter 4 gives the
relevant information. If the communication path is made up of several
sections as in case of connection via modem, intranet/internet,
dedicated data channel and/or via EOC, proceed in steps, checking
the path sections in sequence starting at the side of the PC.
Troubleshooting
1KHW001489-EN
Check all hardware
November 2005
ABB Switzerland Ltd
and its settings forming the
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