Generac Power Systems RTG24SHA1, RTG42SHA1 Owner's Manual
Owner’s Manual
For
Automatic Transfer Switch
with Integrated Load Center
100–200 Amp, Service Entrance
Model Number
RTG24SHA1 (100A)
RTG42SHA1 (200A)
MODEL NUMBER: _________________________
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
Register your Generac product at:
WWW.GENERAC.COM
888-436-3722
Para español , visita:
http://www.generac.com/service‐support/product‐support‐lookup
SAVE THIS MANUAL FOR FUTURE REFERENCE
(000005)
WARNING
California Proposition 65. This product contains or
emits chemicals known to the state of California to
cause cancer, birth defects, and other reproductive
harm.
(000004)
WARNING
California Proposition 65. Engine exhaust and some
of its constituents are known to the state of California
to cause cancer, birth defects, and other reproductive
harm.
ii Automatic Transfer Switch Owner’s Manual
Table of Contents
Section 1: Introduction and Safety
Introduction ......................................................... 1
Safety Rules ........................................................ 1
Safety Symbols and Meanings .......................... 1
Electrical Hazards ............................................... 2
General Hazards .................................................. 3
Section 2: General Information
Introduction ......................................................... 5
Unpacking ............................................................ 5
Equipment Description ....................................... 5
Transfer Switch Mechanism ....................................... 5
Load Center Circuit Breakers ..................................... 6
Service Disconnect Breaker and Terminal Ratings .... 6
Transfer Switch Data Decal ................................ 6
Transfer Switch Enclosure ................................. 6
Safe Use of Transfer Switch .............................. 6
Load Management Options ................................ 6
Smart A/C Module (SACM) ......................................... 7
Smart Management Module (SMM)
(Sold Separately) ............................................... 7
Application Considerations ......................................... 7
Section 3: Installation
Introduction to Installation ................................. 9
Mounting .............................................................. 9
Install Breakers ................................................... 9
Installing Branch Circuit Conductors ............. 10
Connecting Power Source and Generator Power
Supply .......................................................... 10
Connecting Start Circuit Wires ........................ 11
Connecting Smart A/C Module (SACM) .......... 11
Control of Air Conditioner Load ................................ 11
Auxiliary Contact .............................................. 12
Section 4: Operation
Functional Tests and Adjustments .................. 13
Manual Operation ..............................................13
Close to Utility Source Side .......................................13
Close to Generator Source Side ................................14
Return to Utility Source Side .....................................14
Voltage Checks ..................................................14
Utility Voltage Checks ................................................14
Generator Voltage Checks ........................................14
Generator Tests Under Load ............................14
Checking Automatic Operation ........................15
Installation Summary ........................................15
Shutting Generator Down While Under Load ..15
Testing The Smart A/C Module ........................15
Testing The Smart Management Module ......... 16
Section 5: Drawings and Diagrams
Installation Drawings ........................................17
Installation Drawing No. 10000005900 (100A) ..........17
Installation Drawing No. 10000005900 (200A) ..........18
Interconnection Drawings ................................19
Interconnection Drawing 10000005901—
Air-Cooled 100A Generator (page 1 of 2) ........19
Interconnection Drawing 10000005901—
Air-Cooled 100A Generator (page 2 of 2) ........20
Interconnection Drawing 10000005901—
Air-Cooled 200A Generator (page 1 of 2) ........21
Interconnection Drawing 10000005901—
Air-Cooled 200A Generator (page 2 of 2) ........22
Interconnection Drawing 10000005855—
Liquid-Cooled 100A Generator (page 1 of 2) ...23
Interconnection Drawing 10000005855—
Liquid-Cooled 100A Generator (page 2 of 2) ...24
Interconnection Drawing 10000005855—
Liquid-Cooled 200A Generator (page 1 of 2) ...25
Interconnection Drawing 10000005855—
Liquid-Cooled 200A Generator (page 2 of 2) ...26
Automatic Transfer Switch Owner’s Manual iii
Table of Contents
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iv Automatic Transfer Switch Owner’s Manual
Section 1: Introduction and Safety
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Introduction and Safety
Introduction
Thank you for purchasing a Generac Power Systems Inc.
product. This unit has been designed to provide high
performance, efficient operation, and years of use when
maintained properly.
Read this manual thoroughly and understand all of the
instructions, cautions, and warnings before using this
equipment. If any section of the manual is not
understood, contact your nearest authorized dealer, or
contact Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or www.generac.com with any
questions or concerns.
The owner is responsible for proper maintenance and
safe use of the equipment. Before operating or servicing
this transfer switch:
• Study all warnings in this manual and on the
product carefully.
• Become familiar with this manual and the unit
before use.
• Refer to the installation sections of the manual for
instructions on final assembly procedures. Follow
the instructions completely.
Save these instructions for future reference. ALWAYS
supply this manual to any individual that will use this
equipment.
Safety Rules
The manufacturer cannot anticipate every possible
circumstance that might involve a hazard. The warnings
in this manual, and on tags and decals affixed to the unit
are, therefore, not all inclusive. If using a procedure, work
method or operating technique that the manufacturer
does not specifically recommend, verify that it is safe for
others. Also make sure the procedure, work method or
operating technique utilized does not render the
equipment unsafe.
Safety Symbols and Meanings
Throughout this publication, and on tags and decals
affixed to the transfer switch, DANGER, WARNING,
CAUTION and NOTE blocks are used to alert personnel
to special instructions about a particular operation that
may be hazardous if performed incorrectly or carelessly.
Observe them carefully. Their definitions are as follows:
The information in this manual is accurate based on
products produced at the time of publication. The
manufacturer reserves the right to make technical
updates, corrections, and product revisions at any time
without notice.
Automatic Transfer Switch Owner’s Manual 1
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
Introduction and Safety
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000195)
DANGER
Electrocution, equipment and property damage.
Handle transfer switches carefully when installing.
Never install a damaged transfer switch. Doing so
could result in death or serious injury, equipment
and property damage.
(000123)
DANGER
Electrocution. Turn utility supply OFF before
working on utility connections of the transfer
switch. Failure to do so will result in
death or serious injury.
(000157)
DANGER
Electrocution. Do not disable or modify the
connection box door safety switch. Doing so
will result in death or serious injury.
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
(000119)
Equipment malfunction. Installing a dirty or damaged
transfer switch will cause equipment malfunction and
will result in death or serious injury.
DANGER
(000155)
WARNING
Only a trained and licensed electrician should perform
wiring and connections to unit. Failure to follow proper
installation requirements could result in death, serious
injury, and damage to equipment or property.
(000120)
CAUTION
Equipment damage. Verify all conductors are
tightened to the factory specified torque value.
Failure to do so could result in damage
to the switch base.
(000121)
CAUTION
Equipment damage. Perform functional tests in the
exact order they are presented in the manual.
Failure to do so could result in equipment damage.
(000134a)
CAUTION
Equipment damage. Exceeding rated voltage
and current will damage the auxiliary contacts.
Verify that voltage and current are within specification
before energizing this equipment.
Electrical Hazards
2 Automatic Transfer Switch Owner’s Manual
General Hazards
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000123)
DANGER
Electrocution. Turn utility supply OFF before
working on utility connections of the transfer
switch. Failure to do so will result in
death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000213)
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.
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
Introduction and Safety
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000145)
WARNING
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.
(000209a)
WARNING
This unit is not intended for use as a prime power
source. It is intended for use as an intermediate power
supply in the event of temporary power outage only.
See individual unit specifications for required
maintenance and run times pertaining to use.
(000247)
WARNING
Sudden start-up. Always set the safety disconnect
switch to MANUAL before working on equipment.
Failure to do so could result in death or serious injury.
(000194)
• Competent, qualified personnel should install,
operate and service this equipment. Adhere strictly
to local, state and national electrical and building
codes. When using this equipment, comply with
regulations established by the National Electrical
Code (NEC), CSA Standard; C22.1 Canadian
Electric Code, the Occupational Safety and Health
Administration (OSHA), or the local agency for
workplace health and safety.
• If working on this equipment while standing on
metal or concrete, place insulative mats over a dry
wood platform. Work on this equipment only while
standing on such insulative mats.
• Never work on this equipment while physically or
mentally fatigued.
• Any voltage measurements should be performed
with a meter that meets UL3111 safety standards,
and meets or exceeds overvoltage class CAT III.
Automatic Transfer Switch Owner’s Manual 3
Introduction and Safety
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4 Automatic Transfer Switch Owner’s Manual
Section 2: General Information
000219
A
B
C
D
E
General Information
Introduction
Thank you for purchasing a Generac transfer switch. This
manual has been prepared especially for the purpose of
familiarizing personnel with the design, application,
installation, operation and servicing of the applicable
equipment. Read this manual carefully and comply with
all instructions. This will help to prevent accidents or
damage to equipment that might otherwise be caused by
carelessness, incorrect application, or improper
procedures.
Unpacking
Carefully unpack the transfer switch. Inspect closely for
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.
Check that all packing material is completely removed
from the switch prior to installation.
Equipment Description
The automatic transfer switch is used for transferring
electrical load from a UTILITY (NORMAL) power source
to a GENERATOR (STANDBY) power source. Such a
transfer of electrical loads occurs automatically when the
UTILITY power source has failed or is substantially
reduced and the GENERATOR source voltage and
frequency have reached an acceptable level. The
transfer switch prevents electrical feedback between two
different power sources (such as the UTILITY and
GENERATOR sources) and, for that reason, codes
require it in all standby electric system installations.
The transfer switch consists of a transfer mechanism,
utility service disconnect circuit breaker, a control relay,
fuses, terminal strip, and fuse holder for connection of
sensing wires.
This transfer switch is suitable for use as service
equipment.
This UL listed transfer switch is for use in optional
standby systems only (NEC article 702).
A 100A rated switch is suitable for use on utilty services
capable of delivering not more than 10,000 RMS
symmetrical amperes, 240 VAC maximum. A 200A rated
switch is suitable for use on a utility service capable of
delivering not more than 22,000 RMS symmetrical
amperes, 240 VAC maximum when utilized with Siemens
and Murray branch circuit breakers, and suitable for use
on utility services capable of 10,000 RMS symmetrical
amperes, 240 VAC maximum when utilized with Eaton
and Square D Homeline branch circuit breakers.
Figure 2-1. Typical Single-Phase ATS Transfer
Mechanism
A Utility Closing Coil
B Generator Closing Coil
C Utility Lugs (N1 & N2)
D Generator Lugs (E1 & E2)
E Load Lugs (T1 & T2)
Transfer Switch Mechanism
See Figure 2-1. These switches are used with a singlephase system, when the single-phase NEUTRAL line is
to be connected to a neutral lug and is not to be
switched.
This transfer switch is suitable for control of motors, electric
discharge lamps, tungsten filament and electric heating
equipment where the sum of motor full load ampere ratings
and the ampere ratings of other loads do not exceed the
ampere rating of the switch and the tungsten load does not
exceed 30 percent of the switch rating.
Automatic Transfer Switch Owner’s Manual 5
General Information
Load Center Circuit Breakers
This switch is listed for use with the following one inch
breakers:
Manufacturer SCCR Amperage Rating
Siemens
Murray
Eaton
Square D Homeline
tandem breakers up to 50 amps
22 kA (200A)
10 kA (100A)
10 kA (100A and 200A)
including GFCI, AFCI and
NOTE: For branch circuits and feeders over 50 amps,
only listed Siemens or Murray circuit breakers shall be
used.
Service Disconnect Breaker and Terminal Ratings
Breaker Specification
Description Siemens MBK-100A Type EQ8681
Voltage / Amp
Rating
Frequency 60 Hertz
100 Amp Utility Service and
Disconnect Breakers
Utility
Connection
Generator / Load
Connection
Neutral / Ground
Bars
Ground
Conductors Only
Control Wiring 11 in-lbs. (1.2 Nm)
200 Amp Utility Service and
Disconnect Breakers
Utility
Connection
Generator / Load
Connection
Neutral #4 - 2/0 40–50 in-lbs.
Ground (2) or (3) 14 AWG 20 in-lbs. (2.3 Nm)
Control Wiring 11 in-lbs. (1.2 Nm)
#1 - 300MCM(Cu/Al) 250 in-lbs.
#6 - 250MCM (Cu/Al) 275 in-lbs.
or MBK-200A Type EQ8695
2-pole, Single Phase
120/240 VAC, 100A or 200A
(80% Continuous Current Rated)
Tightening Torque
#4 - #3/0 AWG
(Cu/Al)
#14 - 1/0 (Cu/Al) 50 in-lbs. (5.6 Nm)
10-14 Cu/10-12 Al 20 in-lbs. (2.3 Nm)
8 AWG 25 in-lbs. (2.8 Nm)
6-4 AWG 35 in-lbs. (4.0 Nm)
(2) or (3) 14 AWG 20 in-lbs. (2.3 Nm)
(2) 12-10 AWG 20 in-lbs. (2.3 Nm)
(2) 12-10 AWG 20 in-lbs. (2.3 Nm)
55 in-lbs. (6.2 Nm)
Tightening Torque
(28.2 Nm)
(31.0 Nm)
(4.5–5.6 Nm)
Transfer Switch Data Decal
A data decal is permanently affixed to the transfer switch
enclosure. Use this transfer switch only with the specific
limits shown on the data decal and on other decals and
labels that may be affixed to the switch. This will prevent
damage to equipment and property.
When requesting information or ordering parts for this
equipment, make sure to include all information from the
data decal.
For future reference, record the Model and Serial
numbers in the space provided on the front cover of this
manual
Transfer Switch Enclosure
The standard switch enclosure is a National Electrical
Manufacturer’s Association (NEMA) and UL Type 1,
intended for indoor installation only.
Safe Use of Transfer Switch
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
Before installing, operating or servicing this equipment,
read the Safety Rules carefully. Comply strictly with all
Safety Rules to prevent accidents and/or damage to the
equipment. The manufacturer recommends that a copy
of the Safety Rules be posted near the transfer switch.
Also, be sure to read all instructions and information
found on tags, labels and decals affixed to the
equipment.
Three publications that outline the safe use of transfer
switches are the following:
• NFPA 70; National Electrical Code
• UL 1008; STANDARD FOR SAFETY-AUTOMATIC
TRANSFER SWITCHES
• UL 67; Panelboards Marking and Application Guide
NOTE: It is essential to use the latest version of any
standard to ensure correct and current information.
(000100a)
Load Management Options
Load management systems are designed to work
together to prevent a generator from being overloaded by
large appliance loads. A Smart A/C Module (SACM) is
standard in these switches. An optional Smart
Management Module (SMM) is also available.
6 Automatic Transfer Switch Owner’s Manual
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