Page 6
SE-330
Neutral-Grounding-Resistor
Monitor
Rev.
9-A-112913
2.9 A
NALOG
O
UTPUT
An isolated 4–20-mA output indicates NGR current
with full-scale output corresponding to the CT rating. An
internal 24-Vdc supply allows the analog output to be
connected as a self-powered output. Power from an
external supply is required for loop-powered operation.
See Fig. 2.
+24V
+
-
0V
+24V
+
-
0V
18
19
20
21
18
19
20
21
LOOP
SUPPLY
+
-
SELF-POWERED
LOOP POWERED
FIGURE 2. Analog-Output Connections.
3. I
NSTALLATION
3.1 SE-330
Outline and panel-cutout dimensions for the SE-330 are
shown in Fig. 4. To panel mount the SE-330, insert it
through the panel cutout and secure it with four 8-32
locknuts and flat washers (included).
If an optional SE-IP65CVR-G Hinged Cover is used,
follow the included installation instructions. See Figs 6
and 7.
All connections to the SE-330 are made with plug-in,
wire-clamping terminal blocks. Each plug-in terminal
block can be secured to the monitor by two captive screws
for reliable connections.
Outline dimensions and mounting details for surface
mounting the SE-330 are shown in Fig. 5. Fasten the
surface-mount adapter to the mounting surface and make
connections to the adapter terminal blocks. Follow Fig. 5
instructions to mount or remove the SE-330.
Ground terminal 7 (G) and connect terminal 6 (R) to
the sensing-resistor R terminal.
Use terminal 1 (L1) as the line terminal on ac systems,
or the positive terminal on dc systems. Use terminal 2
(L2/N) as the neutral terminal on ac systems or the
negative terminal on dc systems. Connect terminal 3 ( )
to ground. Connect terminal 4 (SPG) to terminal 5
(SPGA). Remove the terminal-4-to-5 connection for
dielectric-strength testing.
N
OTE:
When the terminal-4-to-5 connection is removed,
protective circuits inside the SE-330 are disconnected to
allow dielectric strength testing of a control panel without
having to disconnect wiring to the SE-330. Ensure that
the terminal-4-to-5 connection is replaced after testing.
