E-Mon Class 3200 Installation Instructions Manual page 13

6.2 Main Power Board Connections (continued)
Wire Entry:
3.
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 signals, 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. This enclosure
comes without knockouts and allows the user to choose entry points for the wir-
ing.
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.
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 3200 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 prox-
imity to the meter and easily reachable for the operator. This device must
also be marked as the disconnecting device for the Class 3200 meter. 1/10
Amp Slow Activation in line fuses (KLDR.100, UL listed, Littelfuse 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.
One 3/4" conduit opening is located on the bottom of the CL3200
Fig. 5. Terminal Block TB1, TB2, TB3, and TB4.
13
CLASS 3200 METER
.
62-0390-02