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Transcript 
1. COMPUTER TO RELAY CONNECTION
Connect the SE-330 to the network using a
standard Ethernet patch cable. Use of a crossover
cable to connect the SE-330 directly to the computer
running IP-Config is not recommended. A typical
router will assign an IP address to all connected
computers that are using DHCP. The SE-330 does
not support the use of DHCP.
If the SE-330 is being set-up for first time, it is
recommended to only have one SE-330 connected to
the network to prevent communication errors.
SE-330
(PREVIOUS REVISION)
COMPUTER
LITTELFUSE STARTCO
NEUTRAL-GROUNDING-RESISTOR
MONITOR
GROUND
FAULT
SE-330
RESISTOR
FAULT
DIAGNOSTIC
TRIP
TRIP
CALIBRATED
ROUTER
RELAY K1
8
6
10
15
20
40
60
4
80
2
100
GF TRIP LEVEL
(% CT RATING)
0.5 0.7 1.0
0.4
2.0
0.3
3.0
0.2
5.0
0.1
10.0
POWER
170
130
100
200
340
800
1200
60
1700
20
2000
VN TRIP LEVEL
(S5
CAL
GF TRIP TIME (s)
20 K Ω
VN x 1
100 K Ω )
)
VN x 5
1.8 2.0 2.2
1.6
2.4
1.4
2.6
1.2
2.8
1.0
3.0
PULSE PERIOD (s) )
RESET
FIGURE 1. Computer to Relay Connection.
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