GE b30 User Manual

9-2 B30 Bus Differential System GE Multilin
9.1 OVERVIEW 9 APPLICATION OF SETTINGS
9
The following table shows the assumed short circuit contributions of the connected circuits and their DC time constants.
The basic CT data is presented in the table below. The magnetizing characteristics of the three different types of CTs used
in this example are shown in the following figure.
Figure 9–2: APPROXIMATE CT MAGNETIZING CHARACTERISTICS
Table 9–1: BASIC FAULT DATA OF THE CONNECTED CIRCUIT
CIRCUIT I
FAULT
(KA) T
DC
(MS)
C-1 0.00 N/A
C-2 0.00 N/A
C-3 6.00 5
C-4 5.00 30
C-5 3.00 40
Table 9–2: BASIC CT DATA
CT RATIO V
SAT
(V) R
CTSEC
(Ω)LEADS (M)
CT-1 600:5 144 0.34 210
CT-2 600:5 144 0.34 205
CT-3 1200:5 288 0.64 200
CT-4 1000:5 240 0.54 200
CT-5, CT-6 1000:5 240 0.54 180
CT-7, CT-8 1200:5 288 0.64 200
836732A4.CDR

GE b30 Specifications

General

Model	b30
Manufacturer	GE
Coil Voltage	N/A (Solid State Relay)
Coil Power	N/A (Solid State Relay)
Mechanical Life	N/A (Solid State Relay)
Electrical Life	N/A (Solid State Relay)