3 PRODUCT SCOPE
Unlike a conventional IED, a device with an IEC61850-9-2 interface, or Sampled Value (SV) device accepts current
and voltage measurement inputs, which have already been digitized in accordance with the IEC 61850-9-2LE
standard.
The P446SV is such a device. It accepts sampled analogue values from merging units. It does not accept analogue
values directly and therefore does not have any current or voltage transformers. This provides a number of
advantages over conventional devices, which are discussed throughout this technical manual.
The P446SV has been designed for distance protection of overhead line and underground cable applications,
where the network is solidly grounded. It is used for dual circuit breaker applications, such as breaker-and-a-half,
or ring bus topologies, where two circuit breakers feed each line. As well as distance protection, this device can
also be used for 4-shot phase-segregated Autoreclose protection and a range of standard current, voltage, power
and frequency backup protection applications.
3.1
PRODUCT VERSIONS
This product belongs to the P40L family. Although this technical manual is specific to this product, it is useful to
know where the product fits into the family and to describe the evolution path of the entire product family. The
following diagram attempts to do this:
Chapter 1 - Introduction P446SV
6 P446SV-TM-EN-1
To Next Page
Loading...
Need help?
General