Emerson AT Series - User Manual

Installation, Operation and Maintenance Manual
XXXXXX Rev. 1
July 2016
AT Series with Spur Quarter-Turn Gear Boxes

Summary

Section 1: Preface

1.1 Purpose

Explains the purpose of the manual and the AT Series gearbox.

Section 2: About the AT Series

2.1 Introduction

Describes the AT Series gear operators and their application.

2.2 The AT Series Operator

Details the AT Series operator, showing a general view.

Section 3: Storage and Preinstallation

3.1 Before Installation

Provides guidelines for checking and storing the gearbox before installation.

Section 4: Installation

4.1 Mounting Types

Details the two methods of gearbox installation: Direct Mounting and Bracket Mounting.

Section 5: AT Series Gearbox Operation

5.1 Manual Use

Explains how to operate the gearbox using the hand wheel.

5.2 Stopper Setting

Describes how to set the mechanical stoppers to limit the gearbox stroke.

Section 6: Lubrication

6.1 Application

Details the type of grease used and its change intervals.

Section 7: Disassembly and Reassembly

7.1 Removal of Cover

Instructions for removing the gearbox cover and re-applying sealant.

7.2 Disassembly of Spur Gear Reduction Unit

Steps for disassembling the spur gear reduction unit.

7.3 Dismantling of Worm Line Assembly

Steps for dismantling the worm line assembly.

7.4 Removal of Worm Wheel

Instructions for removing the worm wheel.

7.5 Reassembly of AT Series Gearbox

General steps for reassembling the gearbox.

Section 8: Document Revision

Appendix A: List of Figures

Emerson AT Series Specifications

General

Amperage	30A to 4000A
Output Voltage	Same as input voltage
Type	Automatic Transfer Switch
Poles	2, 3, or 4
Voltage	120V to 600V
Standards	UL 1008, CSA C22.2, IEC 60947-6-1
Operation	Automatic
Efficiency	>98%
Cooling Method	Natural Convection
Dimensions	Varies with amperage
Weight	Varies with amperage