Schneider Electric ALTIVAR 58 TRX - Manual (Page 229)

Class 8998 Motor Control Centers
Sample Specifications
229
09/2003 © 2000–2003 Schneider Electric All Rights Reserved
2.14 Optional Isolation/Bypass Contactors
a. The AC drive controller unit shall include a UL Listed option [NEMA rated isolation and bypass
contactors packaged as a separate MCC unit with steel barriers segregating the AC inverter from
the bypass starter] [IEC rated isolation and bypass contactors integrated with the AC inverter as one
MCC unit to reduce space] complete with thermal overload relay, disconnect interlocked with the
door, control circuit transformer, motor flux decay timer, and an AFC/OFF/BYPASS switch. The
operator shall have full control of the bypass starter by operation of the door-mounted selector
switch.
2.15 Harmonic Analysis
NOTE: The amount of harmonic distortion at the point of common coupling (PCC) is due to the
distribution system characteristics (impedance of the source) and the power source size relative to the
AC drive load. The harmonic current magnitude and voltage distortion values can be predicted through
computer modeling. If the resulting calculations determine that the harmonic distortion will be above the
IEEE-519 specification of 5%, a line reactor can be supplied to lower the harmonic levels. The line
reactor is mounted at the AC drive input to reduce the current harmonics that are fed back into the
supply.
a. A harmonic analysis shall be performed and priced as a separate line item by the AC drive controller
unit manufacturer based upon system documentation consisting of, but not limited to, one-line
diagrams and specific distribution transformer information consisting of kVA, %Z, and X/R data. The
data shall consist of but not be limited to total harmonic voltage distortion and total rms current.
b. The line reactor, if required, shall be provided as a separate, ventilated [NEMA Type 1 Gasketed]
[NEMA Type 1] MCC unit completely factory wired and tested with the AC drive controller unit.
PART 3: EXECUTION
3.01 Inspection
a. Verify that the location is ready to receive work and the dimensions are as indicated.
b. Do not install the AC drive controller unit until the building environment can be maintained within the
service conditions required by the manufacturer.
3.02 Protection
a. Before and during the installation, the AC drive controller unit shall be protected from site
contaminants.
3.03 Installation
a. Installation shall be in compliance with the manufacturer’s instructions, drawings, and
recommendations.
b. The AC drive controller unit manufacturer shall provide a factory-certified technical representative to
supervise the contractor’s installation, testing, and start-up of the AC drive controller unit(s)
furnished under this specification for a maximum total of [_____] days.
3.04 Training
a. An on-site training course of [_____] training days shall be provided by a representative of the AC
drive controller unit manufacturer to plant and/or maintenance personnel, and quoted as a separate
line item.