GE B30 UR Series Instruction Manual page 34

2.1 INTRODUCTION
Table 2–1: ANSI DEVICE NUMBERS AND FUNCTIONS
DEVICE FUNCTION
NUMBER
27P Phase undervoltage
50BF Breaker failure
50G Ground instantaneous overcurrent
2
50N Neutral instantaneous overcurrent
50P Phase instantaneous overcurrent
50/74 CT trouble
50/87 Unrestrained bus differential
2-2
DEVICE
NUMBER
51G
51N
51P
59N
59X
87B
Figure 2–1: SINGLE LINE DIAGRAM
B30 Bus Differential System
2 PRODUCT DESCRIPTION
FUNCTION
Ground time overcurrent
Neutral time overcurrent
Phase time overcurrent
Neutral overvoltage
Auxiliary overvoltage
Restrained bus differential
GE Multilin