Lighting Panel Meter (Funded by U.S. Department of Energy)
Results:
We successfully developed a working prototype of the lighting panel meter integrated building equipment communications system (IBECS)
network component.
A final objective was to demonstrate the benefits of installing inexpensive IBECS-ready submeters at the branch circuit level for
monitoring, verification, and building code compliance. We designed and fabricated several prototypes of a current monitoring device
that outputs its data to IBECS. The units are designed for low-cost, networked measurements of alternating current (AC) in branch or
switch-leg electrical distribution circuits. The units each consist of a split-core current transformer permanently tethered to a
small measurement module, which directly connects to an IBECS network. Each unit is parasitically powered from the network and from
the circuit being tested.
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IBECS Current Monitor showing split-core transformer opened for illustrative purposes. The monitor is installed by placing in
the transformer the conductor that carries the current to be measured; the cover is then snapped shut. The black cable is standard
Telco cable (four- conductor, RJ-11 terminator) and plugs into the IBECS network.
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The preliminary specifications for this component are: |
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Current Transformer Size: |
1.1" x 1.1" x 1.6" |
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Measurement Module Size: |
1.3" x 1.6" 0.8" |
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Tether Cable Length: |
5" |
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Estimated Mfg. Cost: |
$20 |
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Current Measurement Frequency: |
50/60 Hz |
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Maximum Continuous Current: |
75 Amps AC |
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Current Transformer Dielectric: |
1,000 volts max. |
Downloads and Links:
- Report with technical details of sensor and performance at demonstration site
(1.16 MB, 11 pp)
Contact:
Francis Rubinstein, Lawrence Berkeley National Laboratory (LBNL), (510) 486-4096
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