Generac Power Systems RXSW400A3CUL Owner's Manual
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Generac Power Systems RXSW400A3CUL Owner's Manual

Automatic transfer switch
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Owner's Manual
Automatic Transfer Switch
400 Amp, Service Entrance
MODEL NUMBER: RXSW400A3CUL
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
Register your Generac product at:
WWW.GENERAC.COM
http://www.generac.com/service-support/product-support-lookup
For
WARNING
(000209b)
1-888-GENERAC
(888-436-3722)

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Summary of Contents for Generac Power Systems RXSW400A3CUL

  • Page 1 Owner’s Manual Automatic Transfer Switch 400 Amp, Service Entrance MODEL NUMBER: RXSW400A3CUL SERIAL NUMBER: _________________________ DATE PURCHASED:________________________ WARNING Loss of life. This product is not intended to be used in a critical life support application. Failure to adhere to this warning could result in death or serious injury.
  • Page 2 WARNING CANCER AND REPRODUCTIVE HARM www.P65Warnings.ca.gov. (000393a) Automatic Transfer Switch Owner’s Manual...

  • Page 3: Table Of Contents

    Table of Contents Section 1: Introduction and Safety Generator Tests Under Load ......17 Checking Automatic Operation ......17 Introduction ............1 Read This Manual Thoroughly ........1 Installation Summary ........17 Safety Rules ............1 Shutting Generator Down While Under Load ..........17 Electrical Hazards ..........1 Shutting Generator Down To Perform General Hazards ..........2...
  • Page 4 This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...

  • Page 5: Section 1: Introduction And Safety

    Section 1: Introduction and Safety Introduction DANGER Thank you for purchasing a Generac Power Systems Inc. product. This unit has been designed to provide high Indicates a hazardous situation which, if not avoided, performance, efficient operation, and years of use when will result in death or serious injury.

  • Page 6: General Hazards

    Introduction and Safety DANGER CAUTION Electrical backfeed. Use only approved switchgear to Equipment damage. Perform functional tests in the isolate generator from the normal power source. exact order they are presented in the manual. Failure to do so will result in death, serious injury, Failure to do so could result in equipment damage.
  • Page 7 Introduction and Safety DANGER Electrocution. Only authorized personnel should access transfer switch interior. Transfer switch doors should be kept closed and locked. Failure to do so will result in death or serious injury. (000213) DANGER Automatic start-up. Disconnect utility power and render unit inoperable before working on unit.
  • Page 8 Introduction and Safety This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...

  • Page 9: Section 2: General Information

    General Information Section 2: General Information Unpacking This transfer switch is suitable for use on a circuit capable of 22,000 rms symmetrical amperes, 240 VAC Carefully unpack the transfer switch. Inspect closely for maximum. any damage that might have occurred during shipment. The purchaser must file with the carrier any claims for loss or damage incurred while in transit.

  • Page 10: Transfer Switch Data Decal

    General Information Transfer Switch Data Decal • NFPA 70E: Standard for Electrical Safety In The Workplace Figure 2-2. A data decal is permanently affixed to • UL/CUL 1008: Standard for Safety—Automatic the transfer switch enclosure. Use this transfer switch Transfer Switches only with the specific limits shown on the data decal and on other decals and labels that may be affixed to the NOTE: It is essential to use the latest version of any...

  • Page 11: Smart Management Module (Smm)

    General Information Application Considerations Table 2-1. Customer Wiring Connections Generator overload condition is determined by generator Terminal Numbering frequency. Loads are shed when frequency is less than Wire Numbers Decal 58 Hz for three seconds or less than 50 Hz for ½ second BLUE NO.
  • Page 12 General Information This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...

  • Page 13: Section 3: Installation

    Installation Section 3: Installation Introduction to Installation Install the transfer switch as close as possible to the elec- trical loads that are to be connected to it. Mount the This equipment has been wired and tested at the factory. switch vertically to a rigid supporting structure. To pre- Installing the switch includes the following procedures: vent switch distortion, level all mounting points.

  • Page 14: Connecting Power Source And Generator Power Supply

    Installation Connecting Power Source and NOTE: Neutral to ground jumper wire (C) is provided for use if required by local codes. Generator Power Supply 3. Connect generator to the generator terminals (E1 and E2) on the transfer mechanism. DANGER 4. Connect the generator neutral wire to the lower Electrocution.

  • Page 15: Connecting Start Circuit Wires

    Installation Connecting Start Circuit Wires Connecting SACM Figure 3-3. Control system interconnections consist Figure 3-3. The SACM can control an air conditioner of N1, N2, and T1, and leads 23, 0, and 194. The genera- (24 VAC) directly. tor control wiring is a Class 1 signaling circuit. Reference instruction manual of specific engine generator for wiring Control of Air Conditioner Load connection details.
  • Page 16 Installation Thermostat 1 Air Conditioner 1 Thermostat 2 Air Conditioner 2 Thermostat 3 Air Conditioner 3 Thermostat 4 Air Conditioner 4 0 DC GROUND 194 +12 VDC T1 (fused) 23 TRANSFER Battery Charge ® ® N1 (fused) Utility Sense N2 (fused) Utility Sense Ground + 12 VDC...

  • Page 17: Auxiliary Contacts

    Installation Auxiliary Contacts Fault Current Label Figure 3-5. A Fault Current Identification Label is CAUTION provided in the bag containing the unit Owner’s Manual and transfer switch manual operating handle. The 2017 Equipment damage. Exceeding rated voltage and NEC requires that the short-circuit current rating of the current will damage the auxiliary contacts.
  • Page 18 Installation This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...

  • Page 19: Section 4: Operation

    Operation Section 4: Operation Functional Tests and Adjustments Manual Operation DANGER CAUTION Electrocution. Do not manually transfer under load. Equipment damage. Perform functional tests in the Disconnect transfer switch from all power sources exact order they are presented in the manual. prior to manual transfer.

  • Page 20: Close To Normal Source Side

    Operation 3. See Figure 4-1. Note position of transfer mecha- NOTE: Use the Digital Multimeter (DMM) LowZ low input nism main contacts (C, D) by observing display impedance setting to collect accurate voltage measure- windows in “A” and “B” as follows: ments.

  • Page 21: Generator Tests Under Load

    Operation Generator Tests Under Load 5. Set transfer switch utility service disconnect circuit breaker to ON (CLOSED). 1. Set the generator main circuit breaker to OFF 6. Set generator main circuit breaker to ON. (OPEN). 7. Select AUTO on generator panel. The system is 2.

  • Page 22: Shutting Generator Down To Perform Maintenance

    Operation 2. Turn the generator MLCB (generator disconnect) 3. Press the TEST button on the SACM. to OFF (OPEN). 4. Verify that all of the connected loads to be “shed” 3. Run the generator for approximately one minute for become disabled. proper cooling.

  • Page 23: Section 5: Drawings And Diagrams

    Drawings and Diagrams Section 5: Drawings and Diagrams Installation Drawing No. 0K2438-A 400A Service Entrance Rated Automatic Transfer Switch Owner’s Manual...

  • Page 24: Interconnection Drawing

    Drawings and Diagrams Interconnection Drawing No. 10000041110 (Part 1 of 2)—Liquid-Cooled Generator GROUP G INTERCONNECTION DIAGRAM REVISION: A ID 400A CUL SACM DATE: 07/18/18 DRAWING #: 10000041110 Automatic Transfer Switch Owner’s Manual...

  • Page 25: No. 10000041110 (Part 2 Of 2)-Air-Cooled Generator

    Drawings and Diagrams No. 10000041110 (Part 2 of 2)—Air-Cooled Generator GROUP G INTERCONNECTION DIAGRAM REVISION: A ID 400A CUL SACM DATE: 07/18/18 DRAWING #: 10000041110 Automatic Transfer Switch Owner’s Manual...

  • Page 26: Schematic And Wiring Diagram

    Drawings and Diagrams Schematic and Wiring Diagram No. 10000041100 (Part 1 of 2)—Schematic Diagram SCHEMATIC DIAGRAM REVISION: A SERVICE ENTRANCE W/SMART AC MODULE DATE: 07/31/2018 DRAWING #: 10000041100 Automatic Transfer Switch Owner’s Manual...

  • Page 27: No. 10000041100 (Part 2 Of 2)-Wiring Diagram

    Drawings and Diagrams No. 10000041100 (Part 2 of 2)—Wiring Diagram WIRING DIAGRAM REVISION: A SERVICE ENTRANCE W/SMART AC MODULE DATE: 07/31/2018 DRAWING #: 10000041100 Automatic Transfer Switch Owner’s Manual...
  • Page 28 Drawings and Diagrams This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...
  • Page 29 Drawings and Diagrams This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...
  • Page 30 Drawings and Diagrams This page intentionally left blank. Automatic Transfer Switch Owner’s Manual...
  • Page 32 ©2018 Generac Power Systems, Inc. S45 W29290 Hwy. 59 All rights reserved Waukesha, WI 53189 Specifications are subject to change without notice. 1-888-GENERAC (1-888-436-3722) No reproduction allowed in any form without prior written www.generac.com consent from Generac Power Systems, Inc.

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