Schneider Electric 58 TRX manual General Information and MCC Package Features, 212

Class 8998 Motor Control Centers

General Information and MCC Package Features

8998 ATV58 MCC Panel.tif

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:

Motor Ratings	Variable Torque	Constant Torque	Variable Torque, Low
	Applications	Applications	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

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.

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09/2003