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SENTRON 3/6 Bus Plug with Optional SEM3™ Package 3
5.1 ENERGY MANAGEMENT SYSTEM
You can use SEM3™ meters as standalone devices, but their
extensive capabilities are fully realized when integrated with
WinPM.net software as part of an enterprise energy
management (EEM) system.
EEM systems give energy consumers the tools to meet all the
challenges and opportunities of the new energy environment.
EEM systems use real-time information to directly address a
broad range of requirements throughout the power delivery
chain and across an entire enterprise. These systems offer an
integrated solution to managing distributed generation, energy
purchasing, energy cost control, operations and efficiency.
Applications that include SEM3™ typically require additional
equipment. Display & analysis software tools are almost always
used to manage, interpret and distribute the data measured by a
meter. There are usually a variety of tools used, and often these
tools are connected using different communications standards
and protocols.
Reference Energy Management Software link, Section 2.0.
5.2 The SEM3™ meters
The SEM3™ meters provide all common active, reactive and
apparent energy parameters: kWh, kVARh and kVAh,
respectively.
Energy registers can be logged automatically on a programmed
schedule by a supervisory system such as WinPM.Net. Reference
Energy Management Software link Section 2.0.
All energy parameters represent the total for all three phases.
Energy readings are true RMS. Beyond this value, readings roll
over to zero (0).
SEM3™ meter modules provide real-time values, including true
RMS per phase and total for:
• Voltage and current
• Active power (kW) and reactive power (kVAR)
• Apparent power (kVA)
• Power factor and frequency
6.0 BUS PLUG INSTALLATION AND REMOVAL
Refer to the Storage, Installation and Maintenance
Instructions for SENTRON Busway Systems (Section 11.7) for
installation and removal procedure of the SENTRON 3/6 Bus
Plug. If possible, de-energize the busway when installing this
product. Ensure all breakers are in the
OFF position when
installing and removing bus plugs.
Metered bus plugs are designed for connection to a controller
bus plug to create a metering network. Each controller is
designed to manage data from a maximum of 45 meter
modules. It is recommended to position metered bus plugs near
the network controller bus plug to limit the length of control
wiring and the number of connection points in each network.
Bus plugs should be installed on the busway prior to connecting
network control wiring. Limits on control wiring length are
noted in Section 6.3.
TIP: It is suggested to determine the network layout and
meter module address plan PRIOR to installing bus plugs
on the busway. A meter module configuration label (Figure
1) is provided on the cover of each bus plug for recording
network and addressing information. Additionally, a
plexiglass view port covers all meter modules allowing for
the user to view meter module phasing and rack addressing.
This view port also allows racks to be re-addressed without
opening the front cover of the bus plug. See Section 7.3 for
meter addressing.
TIP: Depending upon amperage, voltage and length
requirements, the drop cords from the bus plugs may be
difficult to maneuver. During installation of plugs it is
suggested to keep any wire management devices in place
from shipment. Only remove this wire management
device when the plug is installed on the busway and the
receptacle is required to be plugged into a downstream
load. Additional measures may be required to compensate
for added weight of the plugs due to these cords.
For busway maintenance procedures please see section 12
of the
Storage, Installation and Maintenance Instructions for
SENTRON Busway Systems
manual.
6.1 INSTALLATION CONDITIONS
Ambient temperature may range from 32°F to 104°F (0°C to
40°C) due to the use of thermal trip breakers in many
applications.
Mains supply allow voltage fluctuations of 10% less than
nominal low range and 10% more than nominal high range.
SEM3™ is Measurement Category IV (CAT IV). CAT IV may be
used for utility level measurements on primary over-current
devices. Energy is limited by circuit breakers to less than 110
kVA, with the current not exceeding 11 kA.
Installation and maintenance of the SEM3™ metering system
should only be performed by qualified, competent personnel
that have appropriate training and experience with high voltage
and current devices.
DANGER: Do not use digital output devices for primary
protection functions. These include applications where the
devices perform energy limiting functions or provide
protection of people from injury. Do not use the SEM3™ in
situations where failure of the devices can cause injury
or death, or cause sufficient energy to be released such
that the equipment is a fire hazard. The meter can be used
for energy management functions.