GE B90 - 9 Theory of operation; 9.1 Introduction

B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 9-1
B90 Low Impedance Bus Differential System
Chapter 9: Theory of operation
Theory of operation
This chapter outlines advanced information on operation.
9.1 Introduction
9.1.1 Bus differential protection
The figure shows that input currents defining (through the dynamic bus replica) the bus differential zone are received by
the B90 from current transformers (CTs) associated with the power system.