Product Manual

Table Of Contents

2 Introduction

2.1 Owner Manual

This manual covers models produced under the Cummins

Power Generation (CPG) brand names.

This manual provides information necessary for operation, installation, and service of RA series RA112L1

transfer switches. This manual also includes parts information.

This is an open transition transfer switch which does not include an integral automatic transfer switch

control. With an open transition switch, there is never a time when both sources are supplying power to

the load. The design prevents accidental connection of the generator set to the utility.

This manual includes information on the RA Series RA112L1 transfer switch installation.

RA Series transfer switches are designed to only be installed with the Cummins generator set models

shown below. Installing these switches with any other generator set models will void the warranty.

TABLE 1. CUMMINS GENERATOR SET MODELS USING RA SERIES TRANSFER SWITCHES

C10 D6 C25 D6 C40 D6

C13N6H* C25 N6 C40 N6

C15 D6 C30 D6 C40 N6H

C17N6H* C30 N6 C45 N6H

C20 D6 C30 N6H C50 N6H

C20 N6 C35 D6 C60 N6H

C20N6H* C36 N6

C22 N6 C36 N6H

* Requires TB4 Jumper.

Refer to the wiring diagrams at the end of this manual for specific information about switch configuration.

Use normal and necessary safety precautions before starting any service procedure. Identify all hazards

by referring to the Important Safety Instructions section of this manual and by observing all warnings and

cautions within the manual. Whenever you are troubleshooting, remember that the generator set, the

transfer switch, and the utility power source are all interdependent.