1 CHAPTER OVERVIEW
This product provides biased, phase-segregated, numerical Current Differential protection.
This chapter intr
oduces the principles and theory behind Current Differential protection and describes how they
are implemented in this product. Guidance for applying this protection is also provided.
The current differential protection is enabled by default, but it can be disabled if you don’t want to use it. The
current differential protection needs digital communications links to exchange the values of current between the
terminals in the scheme.
This chapter contains the following sections:
Chapter Overview 97
Current Differential Protection Principle 98
Charging Current Compensation 104
Synchronisation of Current Signals 106
CT Saturation 109
CT Compensation 112
Current Differential Intertripping 113
Stub Bus Differential Protection 114
Application Notes 115
P54A/B/C/E Chapter 6 - Current Differential Protection
P54xMED-TM-EN-1 97
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