Date Code 20151102
SEL Application Guide 2015-33
Application Guide
Volume VIII AG2015-33
Basic Feeder Protection Using SEL-849
Factory Logic
Anthony Rahiminejad
I
NTRODUCTION
The SEL-849 Motor Management Relay offers advanced low-voltage motor protection in a
compact and economical design, but it can also be used to provide basic feeder protection for a
variety of applications.
This application guide demonstrates how to configure the SEL-849 to provide overcurrent
protection for a feeder protection application.
F
ACTORY
D
EFAULT
L
OGIC
C
ONNECTION
Figure 1 shows the connection diagram for factory default I/O assignments for feeder protection
using the SEL-849.
52
A
B
C
SEL-849
Select
Control
Mode
Remote
Close
Open
52A
B9
IN06
B8
COM
0506
B7
IN05
B6
IN04
B5
COM
0304
B4
IN03
B3
IN02
B2
COM
0102
B1
IN01
E4
E1
OUT01
OUT02
E2
E3
E5
52B
52A
A2
A3
–/N
+/H
IA
IB
IC
Source
Load
Feeder
Settings:
APP := FEEDER
CURR_IN := NORMAL
FACTLOG := Y
OUT01 = (TRIP OR STOP) (Hidden)
OUT02 = STR_CLO (Hidden)
OUT03 = (50PAF OR 50GAF) AND TOL1 (available for user)
OUT04 = HALARM OR SALARM (available for user)
TC
CC
Figure 1 Connection Diagram for Factory Default I/O Assignments for Feeder Application
C
ONFIGURE THE
SEL-849
FOR
B
ASIC
F
EEDER
P
ROTECTION
The example settings used in this section are for a 1,200 A feeder supplying a 480 V switchboard.
Perform the following steps to configure the SEL-849.
Step 1
Connect the computer to PORT2A or PORT2B of the relay using an Ethernet cable. Check the
LED for connectivity status.
