Federal Register, Volume 75, Number 226, November 24, 2010, Pages 71519-72652 Page: 71,581
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Federal Register/Vol. 75, No. 226/Wednesday, November 24, 2010/Proposed Rules
2004 12 and C78.81-2010. The
fluorescent lamp should be seasoned for
at least twelve hours and be tested to be
electrically stable and meet reference
lamp conditions as defined in ANSI
C82.13-2005.13 The ballast can be
placed on the test bench and the fixture
should be electrically connected to the
ballast case and to earth ground. The
ballast wire lengths would be as
specified in the manufacturer's catalog
and not bundled or coiled to minimize
capacitive and inductive effects. If the
wire lengths supplied by the
manufacturer are of insufficient length
to reach both ends of lamp, additional
wire may be added. The minimal
additional wire length necessary would
be added, and the additional wire
would be the same wire gauge as the
wire supplied with the ballast. If no
wiring is provided with the ballast, DOE
proposes 18 American wire gauge
(AWG) or thicker wire should be used.
The wires would be separated from each
other and ground to prevent parasitic
capacitance for all wires used in the
apparatus, including those wires from
the ballast to the lamps and from the
lamps to the measuring devices. The test
fixture would be wired with 18 AWG
solid conductor wire. All wires in the
fixture would be kept loose and not
bundled or taped to the fixture metal,
representing common wiring setups in
practice. The ballast under test may be
connected to the fixture through a
terminal strip mounted on the side of
the fixture or may be directly connected.
The ballast would be wired to the lamps
in the fixture according to the
manufacturer's wiring instructions.
As previously proposed in the NOPR,
instrumentation for current, voltage, and
power measurements would be selected
in accordance with ANSI C78.375-
1997 14 Section 9, which specifies that
instruments should be "of the true RMS
type, essentially free from wave form
errors, and suitable for the frequency of
operation." DOE would further specify
instrument performance within the
guidelines of the ANSI C78.375-1997
and ANSI C82.2-2002. Specifically,
lamp arc current would be measured
using a galvanically isolated current
probe/monitor with frequency response
between 40 Hertz (Hz) and 20 MHz. In
addition, lamp arc voltage and input
voltage would be measured directly by
a power analyzer with a maximum 100
picofarad (pF) capacitance to ground
in = Current through the current transducer
Vout = Voltage out of the transducer
Rin = Power analyzer impedance
Rs = Current transducer output impedance
The test setup would be different
depending on the ballast starting
method. As discussed in section III.C.2
12 "American National Standards for Lamp
Ballast-Line Frequency Fluorescent Lamp Ballast,"
approved November 19, 2004.
and depicted in Figure III.2, rapid- and
programmed-start ballast test setups
would include two 1000 ohm resistors
placed in parallel with both sets of lamp
pins. This voltage divider provides a
midpoint from which to measure the
13 "American National Standard for Lamp
Ballasts-Definitions-for Fluorescent Lamps and
Ballasts," approved July 23, 2002.
and with frequency response between
40 Hz and 1 MHz. Coaxial cables would
not be used due to the excessive
capacitance associated with this wiring.
The input current may be measured
either with the internal shunt of a power
analyzer or with an external current
transducer specifically calibrated with
the power analyzer.
For the lamp arc current
measurement, the galvanically isolated
current probe must be calibrated with
the power analyzer. Furthermore, the
current transducer ratio must be set in
the analyzer to match the transducer to
the analyzer. The output from non-
invasive current transducers is usually a
low voltage signal, so the actual current
to voltage ratio to the power analyzer
must consider the losses in addition to
the transducer ratio. Therefore, the full
current to voltage ratio (transducer ratio)
includes the voltage divider effect
between the transducer and the power
analyzer input. Assuming both the
power analyzer and non-invasive
current transducer are properly
calibrated, the actual current to voltage
ratio to use to fully correct the
measurement is as described in equation
lamp arc voltage, minimizing the impact
of cathode heating. Instant-start ballasts
would not employ a voltage divider, but
would require a jumper wire or an
adapter to connect to lamps with two
pins per electrode.
4,American National Standard for Fluorescent
Lamps-Guide for Electrical Measurements,"
approved September 25, 1997.
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United States. Office of the Federal Register. Federal Register, Volume 75, Number 226, November 24, 2010, Pages 71519-72652, periodical, November 24, 2010; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc52807/m1/71/: accessed June 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.