b.
AC voltmeters: Transformer rated, 150-volt input, 60 Hz.[
Provide
external dropping resistors.]
c.
AC wattmeters: Transformer rated for 120-volt input, 60 Hz,
three-phase, four-wire, with scale range coordinated to the ratios of
the associated current transformers and potential transformers.[
Provide external dropping resistors.]
d.
Frequency meters: Rated for 120-volt input, 60 Hz nominal frequency,
[_____] to [_____] Hz scale range.
e.
Synchroscope: Transformer rated at 120-volt input, 60 Hz, with
slow-fast scale.
f.
Power-factor meters: Transformer rated 5-ampere, [120][208]-volt
input, [_____] scale range for use on [three][four]-wire, three-phase
circuits. The accuracy shall be plus or minus 0.01.
g.
DC ammeters: [Self-contained][Shunt-rated], [0 to [_____]
ampere][[_____] to 0 to [_____] ampere] scale range.
h.
DC voltmeters: Self-contained, [0 to [_____] volt][[_____] to 0 volt]
scale range. Furnish resistors, if required, with the voltmeter.
2.2.6.3
Instrument Control Switches
Provide rotary cam-operated type with positive means of indicating contact
positions. Switches shall have silver-to-silver contacts enclosed in a
protective cover which can be removed to inspect the contacts.
2.2.6.4
Electronic Watthour Meter
**************************************************************************
NOTE: On standard projects, use of the electronic
meter versus the optional electro-mechanical meter
is recommended due to decreasing availability of
electro-mechanical meters.
**************************************************************************
Provide a switchboard style electronic programmable watthour meter,
semi-drawout, semi-flush mounted, [in the outgoing section][as indicated].
Meter shall either be programmed at the factory or shall be programmed in
the field. When field programming is performed, turn field programming
device over to the Contracting Officer at completion of project. Meter
shall be coordinated to system requirements.
**************************************************************************
NOTE: When Section 15910, "Direct Digital Control
Systems" is used, coordinate meter requirements.
Determine the appropriate class and form
designations.
**************************************************************************
a.
Design: Provide meter designed for use on a 3-phase, 4-wire, [___/___]
volt system with 3 current transformers. Include necessary KYZ pulse
initiation hardware for Energy Monitoring and Control System (EMCS)[ as
specified in Section 15910N DIRECT DIGITAL CONTROL SYSTEMS].
b.
Coordination:
Provide meter coordinated with ratios of current
SECTION 16361N
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