Eaton Electrical RTC-50 Introduction, Preliminary Comments and Safety Precautions

Instructional Booklet

Page 2 Effective: June 2007

Instruction Manual for the Eaton RTC-50 Automatic Transfer Switch Controller

SECTION 1: INTRODUCTION

CAUTION

ALL POSSIBLE CONTINGENCIES THAT MAY ARISE DURING INSTAL- LATION, OPERATION, OR MAINTENANCE, AND ALL DETAILS AND VARIATIONS OF THIS EQUIPMENT DO NO PURPORT TO BE COV- ERED BY THESE INSTRUCTIONS. IF FURTHER INFORMATION IS DESIRED BY THE PURCHASER REGARDING A PARTICULAR INSTAL- LATION, OPERATION, OR MAINTENANCE OF PARTICULAR EQUIP- MENT, PLEASE CONTACT AN AUTHORIZED EATON ELECTRICAL SALES REPRESENTATIVE OR THE INSTALLING CONTRACTOR.

1.1 Preliminary Comments and Safety Precautions

This technical document is intended to cover all aspects associ- ated with the installation, application, operation, and maintenance of the Automatic Transfer Switch Controller (RTC-50). It is pro- vided as a guide for authorized and qualified personnel only in the selection and application of the RTC-50 controller. Please refer to the specific WARNING and CAUTION in Section 1.1.2 before pro- ceeding. If further information is required by the purchaser regard- ing a particular installation, application, or maintenance activity, please contact an authorized Eaton Electrical Sales Representative or the installing contractor.

1.1.1 Warranty and Liability Information

No warranties, expressed or implied, including warranties of fit- ness for a particular purpose of merchantability, or warranties aris- ing from course of dealing or usage of trade, are made regarding the information, recommendations and descriptions contained herein. In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information and descriptions con- tained herein.

1.1.2 Safety Precautions

All safety codes, safety standards, and/or regulations must be strictly observed in the installation, operation, and maintenance of this device.

WARNING

COMPLETELY READ AND UNDERSTAND THE MATERIAL PRESENTED IN THIS DOCUMENT BEFORE ATTEMPTING INSTALLATION, OPERA- TION, OR APPLICATION OF THE EQUIPMENT. IN ADDITION, ONLY QUALIFIED PERSONS SHOULD BE PERMITTED TO PERFORM ANY WORK ASSOCIATED WITH THIS EQUIPMENT. ANY WIRING INSTRUCTIONS PRESENTED IN THIS DOCUMENT MUST BE FOL- LOWED PRECISELY. FAILURE TO DO SO COULD CAUSE PERMA- NENT EQUIPMENT DAMAGE.

1.2 General Information

Automatic Transfer Switches (ATS) are used to protect critical electrical loads against loss of power. The load’s Utility power source is backed up by an alternate power source such as a Gen- erator. An ATS is connected to both the Utility and Generator power sources and supplies the load with power from one of the two sources. In the event that power is lost from Utility, the ATS transfers the load to the Generator power source. Once Utility power is restored, the load is automatically transferred back to the Utility power source.

An intelligence system initiates the transfer when the Utility power fails or falls below a preset voltage. An engine start is then initiated by the Generator and the ATS transfers to the Generator power source when sufficient Generator voltage is available. When the Utility power is restored, the ATS automatically trans- fers back to the Utility and the Generator will shut down after a time delay.

ATSs automatically perform the transfer function, and include three basic elements:

1.Main contacts to connect and disconnect the load to and from the power sources.

2.Solenoids to make the transfer of the main contacts from source to source.

3.Intelligence/supervisory circuits to constantly monitor the con- dition of the power sources and thus provide the intelligence necessary for the switch and related circuit operation.

This manual deals with the third basic element of the ATS, the required intelligence/supervisory circuits. The RTC-50 controller advances the application of intelligence, supervisory, and pro- gramming capabilities for ATS equipment.

WARNING

THE WARNINGS AND CAUTIONS INCLUDED AS PART OF THE PRO- CEDURAL STEPS IN THIS DOCUMENT ARE FOR PERSONNEL SAFETY AND PROTECTION OF EQUIPMENT FROM DAMAGE. AN EXAMPLE OF A TYPICAL WARNING LABEL HEADING IS SHOWN ABOVE TO FAMILIARIZE PERSONNEL WITH THE STYLE OF PRESENTATION. THIS WILL HELP TO INSURE THAT PERSONNEL ARE ALERT TO WARNINGS, WHICH APPEAR THROUGHOUT THE DOCUMENT. IN ADDITION, WARNINGS AND CAUTIONS ARE ALL UPPER CASE AND BOLDFACE.

1.3 Product Overview

The RTC-50 controller is a comprehensive, multi-function, micro- processor-based ATS controller. Designed to meet the needs of markets worldwide, the RTC-50 controller:

•Is a UL Listed Component

•Complies with UL 1008/ CSA 22.2-178

•Complies with UL 991 environmental tests

•Complies with IEC 61000-4-2, 61000-4-3, 61000-4-4, 61000- 4-5, 61000-4-6, and 61000-4-11

•Complies with CISPR 11, Class B

•Complies with FCC Part 15, Class B

•Meets European Standards Conformance (CE mark)

The RTC-50 controller provides an unmatched degree of pro- grammed flexibility to address the needs of any system. It oper- ates on 240 VAC, single-phase at 50 or 60 Hz. The RTC-50 controller monitors the condition of the line voltage of both the Utility and Generator power sources. The RTC-50 controller pro- vides the necessary intelligence to insure that the transfer switch operates properly through a series of programmed sensing and timing functions.

For more information visit: www.eaton.com IB00405004E-70-8664