3 PRODUCT SCOPE
The P54A, P54B, P54C and P54E IEDs provide high-speed, multi-ended differential protection (without the need of
GPS synchr
onisation) for electrical feeders having between 2 and 6 terminals, for both overhead line and cable
applications. They also include 4-shot phase-segregated Autoreclose protection for single circuit breaker
applications.
The algorithms of these devices work differently from their standard counterparts. The device samples at double
the speed and does not use Fourier transformation to calculate phasors. It uses sampled values directly, which
enables subcycle tripping.
The P54C and P54E provide more I/O and are housed in a larger cases than the P54A and P54B. The differences
between the model variants are summarised in the table below:
Feature/Variant P54A P54B P54C P54E
Number of CT Inputs 4 5 5 5 5 5 5
Number of VT inputs 4 4 4 4 4 4
Opto-coupled digital inputs 8 8 16 16 24 24 32
Standard relay output contacts 8 8 16 8 16 32 32
High speed high break output contacts 4 8
Key functions for each product are described below:
● P54A compact (40TE), economical line differ
ential protection without VT inputs, offering non-directional
backup protection.
● P54B compact (40TE), economical line differential protection with directionalised back-up protection and
inbuilt reclosing and check synchronism.
● P54C transmission-class 1/3-pole tripping line differential protection with backup protection and inbuilt
reclosing and check synchronism (built from today’s P543 hardware).
● P54E transmission-class 1/3-pole tripping line differential protection with back-up protection and inbuilt
reclosing and check synchronism with a large number of binary I/O for traditional hardwired schemes (built
from P545 hardware).
Multi-ended line differential relays are not compatible with the conventional line differential MiCOM Agile relays.
3.1 ORDERING OPTIONS
All current models and variants for this product are defined in an interactive spreadsheet called the CORTEC. This is
av
ailable on the company website.
Alternatively, you can obtain it via the Contact Centre at the following URL:
www.gegridsolutions.com/contact
A copy of the CORTEC is also supplied as a static table in the Appendices of this document. However, it should only
be used for guidance as it provides a snapshot of the interactive data taken at the time of publication.
Chapter 1 - Introduction P54A/B/C/E
6 P54xMED-TM-EN-1
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