1 CHAPTER OVERVIEW
The primary purpose of this product is not overcurrent protection. It does however provide a range of current
pr
otection functions to be used as backup protection. This chapter assumes you are familiar with overcurrent
protection principles and does not provide detailed information here. If you require further information about
general overcurrent protection principles, please refer either to General Electric's NPAG publication, earlier
incarnations of this technical manual, or one of our technical manuals from our P40 Agile Modular distribution
range of products such as the P14x.
This chapter contains the following sections:
Chapter Overview 195
Phase Fault Overcurrent Protection 196
Negative Sequence Overcurrent Protection 199
Earth Fault Protection 202
Sensitive Earth Fault Protection 207
High Impedance REF 212
Thermal Overload Protection 214
Broken Conductor Protection 219
P54A/B/C/E Chapter 9 - Current Protection Functions
P54xMED-TM-EN-1 195
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