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Class 8998 Motor Control Centers
General Information and MCC Package Features
212
09/2003
© 2000–2003 Schneider Electric All Rights Reserved
GENERAL INFORMATION
The Altivar
®
58 TRX AC Drive in Motor Control Centers (MCCs) offers an economical, general purpose
drive in a high density, space saving package. Units are available in NEMA Type 1, Type 1 with gaskets,
and Type 12 (for drives less than 125 hp) MCC enclosures in the following ranges:
MCC PACKAGE FEATURES
As standard, basic MCC Altivar 58 TRX AC Drive units include:
• Altivar 58 TRX AC drive.
• Operator keypad display mounted on the front of the unit.
• Disconnect (circuit breaker or fused switch).
• Class J power fuses (for drives less than 125 hp).
• Cooling fans.
• UL 845 Listed for 100,000 amperes short circuit current rating at 480 Vac.
• Control station plate with space for five 22 mm operators.
• Three-phase line reactor for drives above 25 hp variable torque (VT) @ 480 V, or above 20 hp
constant torque (CT) or variable torque low noise (VTLN) @ 480 V, or above 10 hp @ 208/240 V.
Most MCC Altivar 58 TRX AC Drive units are plug-on style saddles which can be factory/field-installed
in Model 6 MCCs or field-installed in Model 5 MCCs. There are no placement limitations for
mounting any Altivar 58 TRX AC Drive in Square D MCC sections. Drive units are designed with
standard features of Model 6 MCC units, such as:
• White interiors for greater visibility in maintenance.
• Cast metal disconnect handle for ruggedness.
• Twin-handle cam racking mechanism in plug-on units for easy installation/removal.
• Vertical and horizontal wireways are left undisturbed by the drive unit.
Integral to each MCC AC Drive unit is a thermal management system designed to maintain the drive
and other electrical devices at recommended temperatures. The thermal management system included
in NEMA/EEMAC Type 1 or 1A (Gasketed) MCC Altivar 58 TRX AC Drive units consists of fans and
louvered doors which force outside air across the Altivar 58 TRX AC Drive component for cooling
purposes (see the figure on the next page).
The thermal management system included in NEMA/EEMAC Type 12 MCC Altivar 58 TRX AC Drive
units consists of a closed duct system to separate outside air from electrical components. Inlet and
outlet ducts allow airflow across the metal heatsink fins of the Altivar 58 TRX AC Drive component as
shown in the figure on the next page.
This totally enclosed duct cooled (TEDC) concept achieves the oiltight/dusttight rating required for
NEMA/EEMAC Type 12 and removes heat without contaminating the drive electronics or other MCC
units with outside air. The thermal management systems are self-powered and include protection to
shutdown the drive in case of fan or duct blockage.
Motor Ratings
Variable Torque
Applications
Constant Torque
Applications
Variable Torque, Low
Noise Applications
460 Vac, 3 Phase, 60 Hz 0.5 to 500 hp (up to 590 A) 0.5 to 400 hp (up to 115 A) 0.5 to 75 hp (up to 96 A)
230 Vac, 3 Phase, 60 Hz 1 to 50 hp (up to 143 A) 1 to 40 hp (up to 116 A) 1 to 40 hp (up to 116 A)
200 Vac, 3 Phase, 60 Hz 1 to 50 hp (up to 143 A) 1 to 40 hp (up to 116 A) 1 to 40 hp (up to 116 A)
8998 ATV58 MCC Panel Section.tif
8998 ATV58 MCC Panel.tif