Class 8839 58M Enclosed AC Drives
Specifications
d.There shall be no restriction on space requirements between floor mounted enclosures
e.A mechanical interlock shall prevent personnel from opening the AC Drive door when the disconnect is in the “ON” position. It shall be possible for authorized personnel to defeat this interlock. Provisions shall be provided for locking all disconnects in the off position with up to three padlocks. Provisions shall also be made for accepting a padlock on the circuit breaker disconnect, preventing movement of the disconnect to the “ON” position when the door is open.
f.Provisions shall be made for both top and bottom conduit entry. Conduit knockouts shall be provided for wall mounted enclosures. Removable conduit entry plates shall be provided for floor mounted enclosures.
g.All fans within an enclosed AC Drive including the AC Drive heatsink fans shall be front accessible and removable without removal of the AC Drive power converter to facilitate maintenance and or fan replacement.
h.Control wiring shall have permanent wire markings printed on the wire insulation. Both ends of the control wiring shall contain wire markings per the as built control elementary diagram. Red control wiring shall be used for 115Vac control circuits and blue control wiring shall be used for 24V control circuits.
i.All AC Drive enclosure shall be painted ANSI 49 Gray. The enclosure interior shall include a white mounting surface for control and power component mounting for improved visibility.
2.04 MOTOR DATA
a.The AC Drive shall be sized to operate the following AC motor:
Motor Horsepower [1,2,3,5,7.5,10,15,20,25,30,40,50,60,75,100, 125,150,200,250,300,350,400,450,500] Motor full load ampere [specify rating coordinated to NEC Table
Motor RPM [3600/3000,1800/1500, 1200/1000,900/750,720/600,600/500] at 60 Hz
Motor voltage [208,230,460] Motor service factor [1.0,1.15,1.25]
2.05 APPLICATION DATA
a.The AC Drive shall be sized to operate a [Variable Torque, Constant Torque] load.
b.The speed range shall be from a minimum speed of 0.5 Hz to a maximum speed of 400 Hz.
2.06 ENVIRONMENTAL RATINGS
a.The AC Drive shall be of construction that allows operation in a pollution Degree 3 environment. The AC Drive shall meet IEC
b.The AC Drive shall be designed to operate in an ambient temperature from 0 to + 40 °C (+32 to 104 °F).
c.The storage temperature range shall be
d.The maximum relative humidity shall be 95% at 40 °C (104 °F),
e.The AC Drive shall be rated to operate at altitudes less than or equal to 3,300 ft
(1000 m). For altitudes above 3,300 ft,
f.The AC Drive shall meet the IEC
2.07 RATINGS
a.The AC Drive shall be designed to operate from an input voltage of 460 ± 10% Vac or 208
b.The AC Drive shall operate from an input voltage frequency range of 60 Hz ± 2%.
c.The displacement power factor shall not be less than .95 lagging under any speed or load condition.
d.The efficiency of the AC Drive at 100% speed and load shall not be less than 96%.
e.The [constant, variable] torque rated AC Drive overcurrent capacity shall be [150%, 110%] for one minute.
f.The output carrier frequency of the AC Drive shall be randomly modulated and selectable at 2, 4, or 10 kHz depending on Drive rating for low noise operation. No AC Drive with an operable carrier frequency above 10 kHz shall be allowed.
g.The output frequency shall be from 0.1 to 400 Hz for AC Drives up to 75 hp. For horsepower ratings above 75 hp, the maximum output frequency will be 200 Hz.
09/2003
177
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