E-MON CLASS 3200 METER
62-0397—02 14
6.2 Main Power Board Connections (continued)
3. Wire Entry: One 3/4” conduit opening is located on the bottom of the
CL3200 enclosures. This opening is used for bringing in MAINS power and
for current sensor wiring. One 1/2” conduit opening on the top of the metal
enclosure CL3200 can be utilized as an interface for the low- voltage sig-
nals, pulse input, or RS-485 communications wiring to the unit. CL3200
meters are available in an MMU (Multiple Meter Unit) enclosure that holds
eight (8) meters (see MMU installation manual for additional details).This
enclosure comes without knockouts and allows the user to choose entry
points for the wiring.
Any unused openings must be sealed with a UL rated plugging device or hub
suitable for the rating of the enclosure - such as NEMA 1 or 4X.
4. Unit MAINS wiring:
The four positions on terminal block TB1, located at the bottom left corner
of the main power board, are clearly labeled Phase A, B, C, N (neutral). Earth
Ground MUST be connected to the PCB mounting screw in the lower right
corner.
A. Connect the NEUTRAL wire to the appropriate terminal block position.
Fig. 6. Terminal Block TB1, TB2, TB3, and TB4.
NOTE: For 3-wire delta-type applications, do NOT connect the NEUTRAL wire.
Remove the terminal block screw for this position.
B. Earth Ground
Connect the Earth Ground to the PCB mounting screw in lower right
corner.
C. External Switch Mechanism/In-Line Fuse Installation
To ensure a safe installation, the Class 320 meter requires an external
switch mechanism, such as a circuit breaker, be installed on the meter’s
MAINS input wiring. The switch mechanism must be installed in close
proximity to the meter and easily reachable for the operator. This device
must also be marked as the disconnecting device for the Class 320
meter. 1/10 Amp Slow Activation in line fuses (KLDR.100, UL listed, Lit-
telfuse rated 600V/100ma) must be installed for each conductor phase
at the MAINS input to the meter. The fuses must be labeled to indicate
voltage and current rating as well as element characteristics.The fuse
element must be slow activating type.
62-0397_C.fm Page 14 Wednesday, May 9, 2018 9:28 AM
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