3300 ACM Installation and Operation Manual Power Measurement Ltd.
Installation 2-1
2. INSTALLATION
Enclosure Considerations
The enclosure that the 3300 ACM is mounted in (typically a
switchgear cabinet) should protect the device from atmo-
spheric contaminants such as oil, moisture, dust, and
corrosive vapours, or other harmful airborne substances.
The mounting enclosure should be positioned such that the
doors may be opened fully for easy access to the wiring to the
3300 ACM display module, base module, and all related
components to allow for convenient troubleshooting. When
choosing the enclosure size, allow for extra space for all
wiring, intermediate terminal strips, shorting blocks, or any
other required components.
3300 ACM MOUNTING
Appendix A provides the mounting dimensions for the
display and base modules of the 3300 ACM.
The display module of the 3300 ACM can be panel mounted
for easy access and viewing. This module is typically
mounted on the switchgear cabinet door. The panel into
which the display module is to be mounted requires four holes
and one cutout to allow for connection of the display cable. The
layout of the display module mounting studs and cable
connector have been designed such that the module will fit an
existing ANSI C39.1 panel cutout.
ENVIRONMENTAL CONDITION ACCEPTABLE RANGE
Operating Temperature 0
o
C (32
o
F) to 50
o
C (122
o
F)
Storage Temperature -30
o
C (-22
o
F) to +70
o
C (158
o
F)
Relative Humidity 5 to 95% non-condensing
Figure 2.1.1 Environmental Guidelines for Installation
DANGER
During normal operation of this
device, hazardous voltages are
present which can cause severe injury
or death. These voltages are present
on the terminal strips of the device
and throughout the connected
potential transformer (PT), current
transformer (CT), and control power
circuits. Installation and servicing
should be performed only by quali-
fied, properly trained personnel.
CAUTION
The 3300 ACM offers a range of hardware
options that affect phase voltage, phase
current, and power supply input ratings.
The label of the 3300 ACM base module
lists all equipped options. Appendices C
and D define all options and their associ-
ated ratings. This chapter provides de-
tailed installation instructions applicable to
each hardware option.
2.1 LOCATION & MOUNTING
Environmental Conditions
The primary concern in installing the 3300 ACM should be
the environment. The 3300 ACM should be mounted in a
dry, dirt free location away from heat sources and very high
electric fields. To operate properly and effectively, environ-
mental conditions for both the 3300 ACM display and base
modules should fall within the guidelines listed in Figure
2.1.1.
The 3300 ACM base module should be separated from other
equipment and plant walls to allow for convection cooling,
which draws a vertical column of air upward over the device.
This cooling air must not exceed +70
o
C (158
o
F) at any point
immediately below the base module.
Courtesy of NationalSwitchgear.com
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