Class 8839 58M Enclosed AC Drives
Specifications
1.04 WARRANTY
a.An
1.05 QUALITY ASSURANCE
a.The manufacturer of the AC Drive shall be a certified ISO 9001 facility.
b.The AC Drive and all associated optional equipment shall be UL LISTED according to UL508C Power Conversion Equipment. A UL label shall be attached inside each enclosure as verification.
c.The AC Drive shall be designed constructed and tested in accordance with NEMA, NEC, VDE, IEC standards.
d.Every power converter shall be tested with an actual ac induction motor, 100% load and temperature cycled within an environmental chamber at 104 °F. Documentation shall be furnished to verify successful completion at the request of the engineer.
e.All Drive door mounted pilot devices shall be tested to verify successful operation. Documentation shall be furnished upon written request of the engineer.
f.The AC Drive shall undergo QA test procedures and be submitted to a
PART 2 PRODUCT
2.01 MANUFACTURERS
a.The AC Drive shall be provided by Square D/ Groupe Schneider, Class 8839 58M Enclosed, Class 8839 Type CPDM “PowerGard™” or prior approved equal. Substitutions must be submitted in writing three (3) weeks prior to original bid date with supporting documentation demonstrating that the alternative manufacturer meets all aspects of the specifications herein.
b.Alternate control techniques other than pulse width modulated (PWM) are not acceptable.
2.02 GENERAL DESCRIPTION
Note to Specifier: For AC Drives rated up to
100 hp, the most practical harmonic mitigation technique can be line reactors, isolation transformers or harmonic suppressors dependent upon the type of power quality concerns. For AC Drives rated 125 hp and above,
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a.The AC Drive shall convert the input AC mains power to an adjustable frequency and voltage as defined below.
1.For AC Drives rated up to 100 hp, the AC Drive manufacturer shall use a
2.For AC Drives rated 125 hp and above, the AC Drive manufacturer shall supply an 18- Pulse topology using a multiple bridge rectifier design with integral reactor and phase shifting transformer. The
b.The output power section shall change fixed DC voltage to adjustable frequency AC voltage. This section shall use insulated gate bipolar transistors (IGBT) or intelligent power modules (IPM) as required by the current rating of the motor.
2.03 CONSTRUCTION
a.AC Drives rated 25 hp VT at 460 Vac and less shall be supplied in wall mounted enclosures unless compartmentalized, floor mounted enclosures are required for Barriered Bypass construction. (See Emergency Full Speed Requirements.) AC Drives rated 30 hp VT at 460 Vac and above shall be supplied in floor mounted enclosures.
b.Seismic ratings and certifications shall be provided for all floor mounted enclosures. The seismic ratings shall meet IBC 2000, NFPA 5000, ASCE
c.The AC Drive shall be mounted in a [Type 1, Type 12] enclosures with an external operated disconnect device. For AC Drives greater than 75 hp (CT) or 100 hp (VT), NEMA Type 12 or Type 1G ventilated enclosures with gaskets and filters are acceptable.
©
09/2003
