Order Code - GE 745 Instruction Manual

CHAPTER 2: OVERVIEW
Symbol Winding 2 protection elements
250/46 Negative sequence instantaneous overcurrent
251/46 Negative sequence time overcurrent
250P1 Phase instantaneous overcurrent 1
250P2 Phase instantaneous overcurrent 2
250N1 Neutral (3I ) instantaneous overcurrent 1
0
250N2 Neutral (3I ) instantaneous overcurrent 2
0
250G1 Ground instantaneous overcurrent 1
250G2 Ground instantaneous overcurrent 2
251P Phase time overcurrent
251N Neutral (3I ) time overcurrent
0
251G Ground time overcurrent
287TG Ground differential (restricted ground fault)
2THD Total harmonic distortion level
2AD Current demand
2.1.3 Order Codes
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
The order codes for the 745 Transformer Protection System are shown below.
Symbol Winding 3 protection elements
350/46 Negative sequence instantaneous overcurrent
351/46 Negative sequence time overcurrent
350P1 Phase instantaneous overcurrent 1
350P2 Phase instantaneous overcurrent 2
350N1 Neutral (3I ) instantaneous overcurrent 1
0
350N2 Neutral (3I ) instantaneous overcurrent 2
0
351P Phase time overcurrent
351N Neutral (3I ) time overcurrent
0
351G Ground time overcurrent
387TG Ground differential (restricted ground fault)
3THD Total harmonic distortion level
3AD Current demand
FIGURE 2–1: Single line diagram
INTRODUCTION
2–3