background image

IB01602016E

For more information visit: www.eaton.com

Instructional Booklet

Effective: March 2014

Page

 

3

O & M Manual for the RLC1

Automatic Transfer Switch

1.2  General Information

ATSs are used to protect critical electrical loads against loss of 

power.  The load’s utility power source is backed up by a genera-

tor power source.  An ATS is connected to both the utility and 

generator power sources and supplies the load with power from 

one of these two sources.  In the event that power is lost from the 

utility power source, the ATS transfers the load to the generator 

power source.  Once the utility power is restored, the load is auto-

matically transferred back to the utility power source (Figure 2).

Figure 2.  Typical Load Transfer Switch (Contactor) Schematic.

An intelligence system initiates the transfer when the utility power 

source fails or falls below a preset voltage.  An engine start is 

then initiated and the ATS transfers to the generator power source 

when sufficient generator voltage is available.  When the utility 

power source is restored, the ATS automatically transfers back 

and the generator will shut down after a time delay.  In the event 

the utility  power source fails and the generator power source 

does not appear, the ATS remains connected to the utility power 

source until the generator power source does appear.  Conversely, 

if connected to the generator power source and the generator  

power source fails while the utility power source is still unavail-

able, the ATS remains connected to the generator power source.

ATSs automatically perform the transfer function, and include 

three basic elements.

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

the source of power.

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.

1.2.1  Design Configuration

The Eaton Residential ATS is a rugged, compact design that uti-

lizes contactors to transfer essential loads from one power source 

to another (see Figure 3).  The Residential ATS contains suitable 

mechanical and electrical interlock switches to eliminate the possi-

bility of connecting the utility service to the generator output.  In 

addition, a manual override lever is provided for the transfer func-

tion

Figure 3.  RLC1 ATS (100 A).

1.2.2  Optional Service Entrance Feature

The ATS can be ordered in either a standard or service entrance 

(SE) configuration.  When ordered as an SE, integral overcurrent 

protection is built into the switch.  Therefore, the ATS can be 

installed at the point of service entrance without the need for an 

upstream disconnect device. Also the switch comes with a gener-

ator breaker on the generator (source-2) side of the contactor (see 

Figure 5). The generator breaker can be switched OFF to prevent 

the transfer of power from the generator source to the load, if the 

service entrance breaker is switched OFF manually. (not an over-

load condition)

Utility

Generator

Load

  

WARNING

DO NOT MANUALLY TRANSFER THE SWITCH WHILE UNDER LOAD.

Summary of Contents for RLC1

Page 1: ...r the RLC1 Automatic Transfer Switch Instructional Booklet Description Page 1 Introduction 2 2 Receiving Handling and Storage 6 3 Equipment Description 6 4 Installation and Wiring 9 5 Functional Testi...

Page 2: ...r claims against the purchaser or user by its cus tomers resulting from the use of the information and descriptions contained herein 1 1 2 Safety Precautions All safety codes standards and or regulati...

Page 3: ...avail able the ATS remains connected to the generator power source ATSs automatically perform the transfer function and include three basic elements 1 Main contacts to connect and disconnect the load...

Page 4: ...rrent rating of this equipment is 100A and applicable at 240 Vac 60 Hz The ATS equipment is enclosed in a NEMA 3R enclosure and listed for UL applications 1 4 Environmental and Operational Conditions...

Page 5: ...t age underfrequency overfrequency if applicable setpoint ranges for the nominal voltage and frequency setting for a time exceeding 0 5 seconds after the Time Delay Emergency Fail TDEF time delay expi...

Page 6: ...mpact at all times and do not double stack Once the equipment is at the installation site and ready to be installed the packaging material can be removed Refer to Section 4 of this manual for specific...

Page 7: ...Starting TDES This feature provides a time delay of the signal to initiate the engine generator start cycle in order to override momentary power outages or voltage fluctuations of Utility Fixed at 3 S...

Page 8: ...to transfer the load circuit to the Generator power supply All Feature 26 monitoring and protection functions are Fail safe operations 26P All Phase Undervoltage Protection Adjustable Undervoltage Dro...

Page 9: ...are listed for application by UL In addition Eaton ATSs are listed in File E38116 by Underwriters Laboratories Inc under Standard UL 1008 This standard covers the requirements for ATSs intended for us...

Page 10: ...hoose a location that offers a flat rigid mounting surface capa ble of supporting the weight of the enclosed ATS equipment see Figure 8 100 A and 200 A Standard Figure 9 100 A SE Figure 10 200 A SE Pr...

Page 11: ...it www eaton com Instructional Booklet Effective March 2014 Page 11 O M Manual for the RLC1 Automatic Transfer Switch Figure 9 Dimensions and Plan View of SE RLC1 ATS in 100 A Figure 10 Dimensions and...

Page 12: ...ATSs Carefully strip the insulation from the power cables to avoid nick ing or ringing of the conductor strands Prepare the stripped con ductor termination end by cleaning it with a wire brush If alu...

Page 13: ...re 15 the ATS 1 and the generator 2 are connected to the power supply The ATS 1 and emergency distribution panel 3 receive utility power from a dedicated breaker in the utility service panel 4 The ATS...

Page 14: ...nother typical installation for loads can be considered see Figure 17 Refer to Figure 18 for a loads connection dia gram Figure 17 Typical Installation of a Residential or Light Commercial ATS The swi...

Page 15: ...Phase A Utility Phase C Phase B Phase A Generator Phase C Phase B Phase A Generator Utility Utility Generator Control Power Generator K1 Com K1 NO DC_Output Generator Closed K2 Com K2 NO Earth Ground...

Page 16: ...ove terminal block wiring Step 1 Figure 20 shows two tension clamp terminal blocks There is a large one and small one but the operation is the same for both A small tool such as a blade screwdriver wi...

Page 17: ...tral voltages across the generator line terminals to ensure that the generator emergency voltage is correct If necessary make adjustments to the voltage regulator on the generator according to the man...

Page 18: ...or move the lever down to go to generator 7 Once the manual operation is complete and automatic opera tion is desired connect the sources of power 8 Check for 120 Vac at the plug across the Utility Ut...

Page 19: ...ust or foreign matter is present a more frequent maintenance schedule should be followed It is suggested that visual inspections of the equipment be made on a regular basis not just during regularly s...

Page 20: ...the con ductor surfaces due to arcing Inspect the secondary control connections for damage and control wiring for insulation integrity c Inspect the contactor for dust dirt soot grease moisture or co...

Page 21: ...For more information visit www eaton com Instructional Booklet Effective March 2014 Page 21 O M Manual for the RLC1 Automatic Transfer Switch 7 3 Maintenance Log DATE ACTION Example 01 01 04 Inspected...

Page 22: ...rts Table 4 lists the part numbers to use when ordering replacement components To order replacement components contact an authorized Eaton sales repre sentative Figure 25 Field Replaceable Components...

Page 23: ...GROUND CABLE CONNECTIONS NEUTRAL JUMPER NEUTRAL CABLE CONNECTIONS COMPONENT PART NUMBER ATS MODEL Contactor 8160A99G51 100 A Contactor 8160A99G52 200 A ATC 100 Controller ATC 100 100 200 A Harness RL...

Page 24: ...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...

Reviews: