Startco Engineering Ltd.
Page 3
SE-325 Neutral-Grounding-Resistor Monitor
Rev. 9
Pub. SE-325-M, May 6, 2008.
3. I
NSTALLATION
3.1 SE-325
SE-325 outline and mounting details are shown in
Fig. 2. Typical connections are shown in Fig. 1. Connect
supply voltage to L1 and L2. For a 120-Vac supply,
connect supply neutral to L2. For a direct-current supply,
connect supply negative to L2. Connect chassis-bonding
terminal
to ground.
Connect contact terminals A and B as required.
Face-plate LED's are driven in series with remote-
indication LED's. When remote-indication LED’s are not
used, terminals GI, +, and RI must be connected for the
face-plate LED’s to operate. These jumpers are installed
at the factory.
Install the upper terminal-block cover to prevent
inadvertent contact with line terminals.
N
R
G
ER-600VC
SENSING RESISTOR
20 K
600 VAC MAX
W
STARTCO
E N G I N E E R I N G L T D .
MADE IN SASKATOON, CANADA
600 V
4160 V
SUPPLY
NEUTRAL
GROUNDING
RESISTOR
CT200
GROUND-FAULT CT
UV
120 VAC
L
N
LOAD
RESISTOR-FAULT
INDICATOR
GROUND-FAULT
INDICATOR
RESET SWITCH
REMOTE INDICATION AND RESET
RED
RED
F 1
R E S E T
P O W E R
G R O U N D
F A U L T
GF TRIP
TIME (s)
R E S I STO R
F A U L T
RES TRIP
LEVEL (VAC)
CT1 CT2 A
B
R I
G I
S W
L 1
R
L 2
G
STARTCO
E N G I N E E R I N G L T D .
NGR MONITOR
SE-325
MODE R E S
G F
2 0
4 0 0
2 0 0
0 . 1
2 . 0
1 . 0
4.0 A
2.0 A
0.5 A
S H
U V 2 0 K
R I
G I
S W
R
G
STARTCO
E N G I N E E R I N G L T D .
NGR MONITOR
SE-325
ER
R
S
1
R
S
2
C
G
I
G
R
I
+
S
W
K1
K2
SW
CI/GI
+
GI/RI
TB1
RESISTOR-FAULT
INDICATOR
GROUND-FAULT
INDICATOR
RESET SWITCH
RED
RED
RK-13 CONNECTION WITH REMOTE INDICATION AND RESET
ALTERNATE
RESET CIRCUIT
24-120 Vac/Vdc
RK-13 CONNECTION WITHOUT REMOTE INDICATION OR RESET
K1
K2
RI
+
GI
SW
R I
G I
S W
R
G
STARTCO
E N G I N E E R I N G L T D .
NGR MONITOR
SE-325
RI
GI
SW
ER
R
S
1
R
S
2
C
G
I
G
R
I
+
S
W
K1
K2
SW
CI/GI
+
GI/RI
TB1
K1
K2
R I
G I
S W
R
G
STARTCO
E N G I N E E R I N G L T D .
NGR MONITOR
SE-325
ER
NOTES:
1. ALTERNATE SENSING-RESISTOR TERMINAL-N CONNECTION,
THE NEUTRAL CONNECTION IS NOT MONITORED.
2. K1 CLOSES ON GROUND-FAULT TRIP.
3. K2 CLOSES ON RESISTOR-FAULT TRIP.
4. VOLTAGE BETWEEN ER TERMINALS R AND G
LIMITED TO 100 V BY INTERNAL CLAMP.
CAUTION: DO NOT USE K1 OR K2 IN A TRIP CIRCUIT.
NOTE 1
NOTES 2 & 3
NOTE 4
FIGURE 1. Typical Application.