Intended Use Of Nsd600 - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
emphasis can always be placed on dependability or security or speed,
depending on the application. A blocking protection scheme, for
instance, needs a short transmission time and a high dependability,
while a permissive tripping scheme needs a short transmission time
with good security and a high dependability; direct transfer tripping
schemes, by contrast, require very high dependability and security,
achieved at the expense of a longer transmission time.
The above mentioned protection schemes are explained in section
3.6.5.
Up to two individual NSD600 TPE systems – each transmitting four
independent protection commands - can be operated in the ETL600
PLC equipment. They are suitable for handling the tripping signals in
blocking, permissive and direct transfer tripping schemes. Four
commands enable parallel circuit lines to be protected with permissive
tripping of the line protection and direct transfer tripping of a
compensator or the breaker back-up protection for example.
By using micro-processor techniques and digital signal processing, the
NSD600 is able to ideally fulfill the high performance demands when
transmitting tripping signals via PLC.
The full version of the teleprotection equipment NSD600 comprises at
least one additional module, the teleprotection interface type G4AI,
which is directly inserted into the power line carrier equipment type
ETL600.
Besides some specific jumper settings (i.e. the command tripping
voltage of the G4AI inputs), all parameters are configurable by means
of the windows based user interface HMI600 for the ETL600 system.
For the same reason commissioning, testing and maintenance also
becomes easy.
The use of the NSD600 in conjunction with ETL600 and HMI600 is
documented and explained in this chapter.
3.6.2.

Intended use of NSD600

The teleprotection equipment type NSD600 is designed as an optional
service to be used exclusively together with PLC equipment type
ETL600.
The NSD600 fully complies with the Product Standard IEC 60834-1 for
teleprotection equipment of power systems. It further meets or
exceeds the requirements according the European EMC Directive
89/336/EEC and the Low Voltage Directive 73/23/EEC.
Two individual NSD600 systems can be configured. They are always
assigned to the first two APLC channels, if available, or - in case of a
mixed mode dual channel ETL600 – one NSD600 is assigned to the
APLC and one NSD600 to the DPLC channel. If only data
communication is used at all, one NSD600 can also be assigned to
this DPLC channel.
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1KHW001489-EN
November 2005
ETL600
Structure and Function