2.6.12.1
Instrument Transformers
All transformers used for metering shall meet the requirements of ANSI
C12.11 and IEEE C57.13. Voltage transformers shall be protected with
removable primary and secondary fuses. Fuses shall be installed in each
ungrounded lead and located adjacent to the transformers in an easily
accessible place. If cable connections to current transformer primary are
required, terminals of an approved solderless type and proper size shall be
furnished. If current transformers are connected to buses, proper
connections shall be furnished, complete with bolts, nuts, washers and
other accessories.
2.6.12.2
Switchboard type ammeter shall be provided where indicated on the drawings.
Ammeter, range 0 to [_____] amperes, complete with selector switch having
off position and positions to read each phase current. Meters shall be
long scale 175 mm 6.8 inches), semiflush rectangular, indicating type
mounted at eye level.
2.6.12.3
Voltmeters
Switchboard type voltmeter shall be provided where indicated on the
drawings. Voltmeter, range 0 to 600 volts, complete with selector switch
having off position and positions to read each phase to phase voltage.
Meters shall be long scale 175 mm 6.8 inches, semiflush rectangular,
indicating type mounted at eye level.
2.6.12.4
Watthour Meters
Watthour meters shall conform to ANSI C12.1 and ANSI C12.10, except
numbered terminal wiring sequence and case size may be the manufacturer's
standard. Watthour meters shall be of the drawout switchboard type having
a 15-minute, cumulative form, demand register meeting ANSI C12.4 and
provided with not less than two and one-half stators. [Watthour demand
meters shall have factory installed electronic pulse initiators meeting the
requirements of ANSI C12.1.]
2.6.12.5
Switches
All metering switches shall be of the rotary switchboard type with handles
on the front and operating contact mechanisms on the rear of the panels.
Control switches shall be suitable for operation on 600-volt AC or 250-volt
DC circuits. All such switches shall be capable of satisfactorily
withstanding a life test of at least 10,000 operations with rated current
flowing in the switch contacts. Selector switches shall be
maintained-contact type with the required number of positions, and shall
have round notched, or knurled handles. Ammeter switches shall not open
the secondary circuits of current transformers at any time. Instrument
switches for potential selection shall have oval handles.
2.6.13
[Power-Factor-Correction Capacitors
**************************************************************************
NOTES: Power factor correction capacitors should
not be used on the load side of solid state
starters. Motor control center manufacturers do not
normally contact the motor manufacturers, so where
SECTION 16403A
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