Briggs & Stratton Automatic Transfer Switch User Manual
Installation & Operator’s Manual
100 Amp / 200 Amp NEMA 3R
Automatic Transfer Switch
with Service Disconnect
Part No. 200009GS Rev. B (03/19/2008)
Thank you for your purchase of this Briggs & Stratton Power Products Automatic Transfer Switch. This product is intended
for use with Briggs & Stratton Home Standby Generator sets and therefore may not function with generators produced by
other manufacturers. Seek a qualified electrical professional to determine applicability of this equipment to generators aside
from those manufactured by Briggs & Stratton. This is an optional home standby system which provides an alternate source
of electric power and to serve loads such as a gas furnace, refrigeration and communication systems that, when stopped
during any power outage, could cause discomfort, or the like. This product does not qualify for emergency standby as defined
by NFPA 70 (NEC).
This manual contains safety information to make you aware of the hazards and risks associated with transfer switches and
how to avoid them. Briggs & Stratton has made every effort to provide for a safe, streamlined and cost-effective installation.
Each installation is unique, it is impossible to know of and advise of all conceivable procedures and methods by which
installation might be achieved. We do not know all possible hazards and/or the results of each method or procedure. Save
these instructions for future reference.
This transfer switch requires installation before use. Refer to the Installation section of this manual for instructions on
installation procedures. Only licensed electrical contractors should install transfer switches. Installations must strictly
comply with all applicable federal, state and local codes, standards and regulations.
Where to Find Us
You never have to look far to find Briggs & Stratton support and service for your transfer switch. Consult your Yellow Pages.
There are over 30,000 Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also
contact Briggs & Stratton Customer Service by phone at (800) 743-4115, or on the Internet at BRIGGSandSTRATTON.COM.
Transfer Switch
Model Number
Revision
Serial Number
Date Purchased
Briggs & Stratton Power Products Group, LLC
900 North Parkway
Jefferson, WI 53549
Copyright © 2008 Briggs & Stratton Power Products Group, LLC.
All rights reserved. No part of this material may be reproduced or
transmitted in any form by any means without the express written
permission of Briggs & Stratton Power Products Group, LLC.
2 BRIGGSandSTRATTON.COM
Table of Contents
Important Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
For the Home Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Owner Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installer Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Equipment Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Power Wiring Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Supervisory Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Testing the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Transfer Switch Schematic and Wiring Diagram . . . . . . . . . . . . . . . . . . . . 11
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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3
Important Safety Instructions
This is the safety alert symbol. It is used to alert
you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid
possible injury or death.
The safety alert symbol ( ) is used with a signal word
(DANGER, CAUTION, WARNING), a pictorial and/or a safety
message to alert you to hazards. DANGER indicates a hazard
which, if not avoided, will result in death or serious injury.
WARNING indicates a hazard which, if not avoided, could
result in death or serious injury. CAUTION indicates a hazard
which, if not avoided, might result in minor or moderate
injury. NOTICE indicates a situation that could result in
equipment damage. Follow safety messages to avoid or
reduce the risk of injury or death.
The manufacturer cannot possibly anticipate every possible
circumstance that might involve a hazard. The warnings in
this manual, and the tags and decals affixed to the unit are,
therefore, not all-inclusive. If you use a procedure, work
method or operating technique that the manufacturer does
not specifically recommend, you must satisfy yourself that
it is safe for you and others. You must also make sure that
the procedure, work method or operating technique that you
choose does not render the transfer switch unsafe.
WARNING
Certain components in this product and related
accessories contain chemicals known to the State
of California to cause cancer, birth defects or other
reproductive harm. Wash hands after handling.
WARNING
Only qualified electricians should attempt installation of
this system, which must strictly comply with applicable
codes, standards and regulations.
WARNING
Low voltage wire cannot be installed in same
conduit as power voltage wiring.
Failure to follow above warning could cause personal
•
injury, damage and/or malfunction of equipment.
WARNING
Failure to properly ground transfer switch can
result in electrocution.
DO NOT touch bare wires or receptacles.
•
DO NOT use transfer switch with worn, frayed, bare or
•
otherwise damaged wiring.
DO NOT handle electrical cords while standing in water,
•
while barefoot, or while hands or feet are wet.
If you must work around a unit while it is operating,
•
stand on an insulated dry surface to reduce shock
hazard.
DO NOT allow unqualified persons or children to operate
•
or service transfer switch.
In case of an accident caused by electrical shock,
•
immediately shut down the source of electrical power
and contact local authorities. Avoid direct contact with
the victim.
WARNING
Transfer Switch contains hazardous voltage
that can cause personal injury or death.
Despite the safe design of the transfer switch, operating
•
this equipment imprudently, neglecting its maintenance
or being careless can cause possible injury or death.
NOTICE
Improper treatment of transfer switch can damage it and
shorten its life.
Use transfer switch only for intended uses.
•
If you have questions about intended use, ask dealer or
•
contact Briggs and Stratton Power Products.
DO NOT expose transfer switch to excessive moisture,
•
dust, dirt, or corrosive vapors.
Remain alert at all times while working on this
•
equipment. NEVER work on the equipment when you are
physically or mentally fatigued.
If connected devices overheat, turn them off and turn off
•
their circuit breaker/fuse.
4 BRIGGSandSTRATTON.COM
Introduction
Your Briggs & Stratton Transfer Switch is supplied with this
combined “Installation and Operator’s Manual”. This is an
important document and should be retained by the owner
after the installation has been completed.
Every effort has been expended to make sure that the
information in this manual is both accurate and current.
However, the manufacturer reserves the right to change,
alter or otherwise improve the system at any time without
prior notice.
For the Home Owner
To help you make informed choices and communicate
effectively with your installation contractor(s),
Read and understand the Owner Orientation Section
of this manual BEFORE contracting or starting your
transfer switch installation.
To arrange for proper installation, contact the store at which
you purchased your Briggs & Stratton Transfer Switch, your
dealer, or your utility power provider.
The Transfer Switch Warranty is VOID
unless the system is installed by a
licensed electrical professional.
Owner Orientation
The illustrations are for typical circumstances and are meant
to familiarize you with the installation options available with
your transfer switch.
Local codes, appearance, and distances are the factors that
must be considered when negotiating with an installation
professional. As the distance from the existing electrical
service increases, compensation in wiring materials must
be allowed for. This is necessary to comply with local codes
and overcome electrical voltage drops.
The factors mentioned above will have a direct effect on the
overall price of your transfer switch installation.
NOTE: Your installer must check local codes AND obtain
permits before installing the system.
• Read and follow the instructions given in this manual.
• Follow a regular schedule in caring for and using your
transfer switch, as specified in the manual.
Installer Responsibilities
• Read and observe the safety rules.
• Read and follow the instructions given in this manual.
• Check federal, state and local codes and authority
having jurisdiction, for questions on installation.
• Ensure generator is not overloaded with selected loads.
If you need more information about the transfer switch, call
(800) 743-4115, between 8:00 AM and 5:00 PM CT.
Equipment Description
The transfer switches are intended to transfer the entire
load of normal residential installations when used with the
supervisory contacts provided. The load is connected either
to utility power (normal) or home standby power (generator).
The transfer switch monitors utility and generator voltages
and will automatically connect to the appropriate source of
power.
These switches make it easy for a licensed electrician to
complete a home standby installation. The unit contains
utility service disconnect circuit breaker, generator
disconnect circuit breaker and automatic transfer switch
in one enclosure. Service conduit and conductors can be
wired directly from your meter to the transfer switch. A
separate disconnect and associated wiring are not required
when installed per applicable federal, state and local codes,
standards and regulations.
Major components of the transfer switch are a 2 pole utility
disconnect circuit breaker, a 2 pole generator disconnect
circuit breaker, a 2 pole double throw transfer switch, control
circuit board, fused utility terminals and interconnecting
wiring.
The transfer switch is solenoid-operated from utility or
generator inputs and contains suitable mechanical and
electrical interlock switches to eliminate the possibility of
connecting the utility service to the generator output. It
has ratings capable of switching full utility power into the
residence. In addition, a manual override lever is provided
for the transfer function.
The control circuit board has active circuits sensing utility
and generator voltages. It creates a signal for the generator
start-up, switch transfer, retransfer when utility is restored
and generator cool down periods. The control board also
contains red and green LED’s indicating the power sources
available and two relay operated contacts that provide
supervisory control of external loads.
5
Installation
Unpacking
Delivery Inspection
After removing the carton, carefully inspect the transfer
switch components for any damage that may have occurred
during shipment.
IMPORTANT: If loss or damage is noted at time of delivery,
have the person(s) making delivery note all damage on the
freight bill and affix his signature under the consignor’s
memo of loss or damage. If loss or damage is noted after
delivery, contact the carrier for claim procedures. Missing or
damaged parts are not warranted.
Shipment Contents
• Automatic Power Transfer Switch
• Installation and Operator’s Manual
Mounting Guidelines
The Automatic Transfer Switch is enclosed in a NEMA
Type 3R enclosure suitable for indoor/outdoor use.
Guidelines for mounting the Automatic Transfer Switch
include:
• Install the switch on a firm, sturdy supporting structure.
• The switch must be installed with minimum NEMA 3R
hardware for conduit connections.
• To prevent switch contact distortion, level and plumb the
enclosure. This can be done by placing washers between
the switch enclosure and the mounting surface.
• NEVER install the switch where any corrosive
substance might drip onto the enclosure.
• Protect the switch at all times against excessive moisture,
dust, dirt, lint, construction grit and corrosive vapors.
A typical installation of the Automatic Power Transfer Switch
is depicted. An alternative installation of the Automatic Power
Transfer Switch is also depicted. It is best if the transfer
switch is mounted near the utility meter, either inside or
outside. Discuss layout suggestions/changes with the owner
before beginning the system installation process.
Typical
Alternate
— — — — — — Control Wiring
Hot
Water
Heater
Branch Circuits
— — — — — — Control Wiring
Contactor
Contactor
Service and
Disconnect
Main
Distribution
Panel
Transfer
Switch w/
Generator
Main
Distribution
Panel
Watt -
Hourmeter
Generator
Air
Conditioner
Disconnect Switch
Watt -
Hourmeter
Branch Circuits
Hot
Water
Heater
Emergency Branch Circuits
Emergency
Load
Center
Disconnect Switch
Transfer
Switch
Generator
Air
Conditioner
6 BRIGGSandSTRATTON.COM
Power Wiring Interconnections
All wiring must be the proper size, properly supported and
protected by conduit.
Complete the following connections between the transfer
switch, main distribution panel, utility power and generator.
The 100 Amp transfer switch (Model 071022) is depicted
below and the 200 Amp transfer switch (Model 071023) is
depicted on the next page.
WARNING
Low voltage wire cannot be installed in same
conduit as power voltage wiring.
Failure to follow above warning could cause personal
•
injury, damage and/or malfunction of equipment.
1. Ensure utility power is turned OFF. Connect utility
Service conductors to line side of transfer switch
service disconnect circuit breaker.
2. Connect utility service Neutral conductor to the transfer
switch “NEUTRAL” terminal.
3. Connect main breaker panel feeder conductors
to transfer switch terminals marked “LOAD
CONNECTION”.
4. Connect main breaker panel Neutral conductor to
transfer switch “NEUTRAL” terminal.
5. Connect main breaker panel Ground conductor to the
transfer switch “GND” terminal.
NOTE: Assure grounding electrode conductor is connected
and bonded per applicable federal, state and local codes,
standards and regulations.
6. Connect generator feeder conductors from the
generator control panel to line side of transfer switch
“GENERATOR” breaker.
7. Connect Neutral conductor from the generator control
panel to the transfer switch “NEUTRAL” terminal.
8. Connect generator Ground conductor from the control
panel to the transfer switch “GND” terminal.
NOTE: Assure generator equipment grounding conductor
is connected per applicable federal, state and local codes,
standards and regulations.
Model 071022
Utility
Connection
Load
Connection
Ground
Terminal
To Utility Meter
Generator
Connection
Supervisory
Neutral
Terminal
Neutral
Bus
Contacts
Main Distribution Panel
Main
To Generator
Ground Bus
7
Model 071023
To Utility Meter
Utility
Connection
Load
Connection
Ground
Terminal
To Generator
Generator
Connection
Supervisory
Neutral
Terminal
Neutral
Bus
Contacts
Main Distribution Panel
Main
9. Connect generator “UTILITY 240 VAC” terminals to
transfer switch “UTILITY 240 VAC” terminals. Use
minimum #14 AWG conductors.
10. Tighten all wire connections/fasteners to proper torque.
See inside transfer switch enclosure for proper torque
values.
Supervisory Control Wiring
Terminal strip on control module in transfer switch has
four connections for customer use. There are two sets of
“Normally Closed” contacts available. They will be opened
when generator power is required. These can be used to lock
out large loads when powered by generator. Example: air
conditioner, hot water heater, etc..
Ground Bus
Air Conditioner Contactor
A
24 VAC
A
Contactor
B
B
1. Terminals on control module are for installer supplied
contactors to lock out large loads. Example: air
conditioner, electric hot water heater, etc.. Contacts are
connected in series with the contactor control circuit.
2. Tighten all wire connections/fasteners to proper torque.
See inside transfer switch enclosure for proper torque
values.
Neutral
120 VAC
8 BRIGGSandSTRATTON.COM
Controls
Other than a Manual Override lever, there are no operator
controls because this is an automatic transfer switch. The
manual override is to be used only by licensed professionals.
Operation
To select automatic transfer operation, do the following:
1. Set utility service disconnect circuit breaker in transfer
switch to “On” position.
2. Set generator disconnect circuit breaker in transfer
switch to “On” position.
3. Set generator’s main circuit breaker to its “On”
position.
4. Install 15 Amp fuse in control panel on generator.
5A. If generator is equipped with a system ON/OFF switch,
set switch to “ON” position.
B. If generator is equipped with a AUTO/OFF switch, set
switch to “AUTO” position.
The system will now be in automatic operation mode.
Testing the Automatic Transfer Switch
Turn the utility disconnect circuit breaker in the transfer
switch, to the “Off” position. The automatic sequence will
follow. To go back to utility power, turn the utility disconnect
circuit breaker to the “On” position.
Utility Fail
The Home Standby Generator system senses when utility
voltage is below 70 percent of nominal. Engine start
sequence is initiated after 6 second time delay.
Engine Warm-Up
Time delay to allow for engine warm-up before transfer is
fixed at 20 seconds or 50 seconds with movement of jumper
on control board.
Transfer
Transfer from utility to generator supply occurs after
generator voltage is above set levels. Minimum engine run
time is 5 minutes after transfer.
Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.
Retransfer
Retransfer from generator to utility supply is approximately
10 seconds after utility voltage supply is above pickup level
and minimum run time is completed.
Engine Cool Down
Engine will run for 60 seconds after retransfer.
Maintenance
The transfer switch is designed to be maintenance free under
normal usage. However, inspection and maintenance checks
should be made on a regular basis. Maintenance will consist
mainly of keeping the transfer switch clean.
Visual inspections should be done at least once a month.
Access to transfer switch must not be obstructed. Keep
3 feet (92 cm) clearance around transfer switch. Check for
an accumulation of dirt, moisture and/or corrosion on and
around the enclosure, loose parts/hardware, cracks and/or
discoloration to insulation, and damaged or discolored
components.
Exercise the transfer switch at least once every three months
as described in the previous section Testing the Automatic
Transfer Switch unless a power outage occurs and Home
Generator System has gone through automatic sequence.
Allow generator to run for at least 30 minutes.
Contact a licensed electrical professional to inspect and clean
the inside of your transfer switch at least once a year.
9
Troubleshooting
Problem Cause Correction
Automatic transfer switch does not
transfer to generator
Automatic transfer switch does not
transfer to utility
Generator is still running after switch
transfers to utility power
Generator or supervised loads (air
conditioner, etc.) are operating
improperly when generator is supplying
power
Generator is still running after utility
power is restored
1. Generator breaker open.
2. Generator voltage not acceptable.
3. Generator disconnect circuit breaker
open.
1. Utility disconnect circuit breaker
open.
2. Utility voltage not acceptable.
Engine cool down period. Engine should stop after 1 minute.
1. NC contacts not operating correctly.
2. Too much load on generator.
1. Minimum engine run time has not
elapsed.
2. Fuse(s) in transfer switch is
defective.
1. Reset generator circuit breaker.
2. Refer to generator manual.
3. Reset generator disconnect circuit
breaker.
1. Reset utility disconnect circuit
breaker.
2. Wait for utility voltage to return to
normal.
1. Check NC contacts for proper
operation and/or check control
wiring to external load.
2. Decrease load to generator.
1. Wait five minutes for transfer switch
to retransfer to utility power.
2. Check fuse(s) and replace if
necessary
10 BRIGGSandSTRATTON.COM
Transfer Switch Schematic and Wiring Diagram
11
BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC TRANSFER SWITCH OWNER WARRANTY POLICY
Effective November 1, 2005 replaces all undated Warranties and all Warranties dated before November 1, 2005
LIMITED WARRANTY
Briggs & Stratton Power Products Group, LLC will repair or replace, free of charge, any part(s) of the equipment that is defective in material or
workmanship or both. Transportation charges on product submitted for repair or replacement under this warranty must be borne by purchaser. This
warranty is effective for the time periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in
our dealer locator map at BRIGGSandSTRATTON.com.
THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW. ANY AND ALL IMPLIED WARRANTIES ARE
EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW. Some
states or countries do not allow limitations on how long an implied warranty lasts, and some states or countries do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and
you may also have other rights which vary from state to state or country to country.
WARRANTY PERIOD
Consumer Use
Commercial Use
The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the
table above. “Consumer use” means personal residential household use by a retail consumer. “Commercial use” means all other uses, including use for
commercial, income producing or rental purposes. Once equipment has experienced commercial use, it shall thereafter be considered as commercial use for
purposes of this warranty. Equipment used for prime power in place of utility are not applicable to this warranty.
NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASE
RECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THE MANUFACTURING
DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.
3 years
None
ABOUT YOUR WARRANTY
We welcome warranty repair and apologize to you for being inconvenienced. Any Authorized Service Dealer may perform warranty repairs. Most warranty
repairs are handled routinely, but sometimes requests for warranty service may not be appropriate. For example, warranty service would not apply if
equipment damage occurred because of misuse, lack of routine maintenance, shipping, handling, warehousing or improper installation. Similarly, the
warranty is void if the manufacturing date or the serial number on the equipment has been removed or the equipment has been altered or modified. During
the warranty period, the Authorized Service Dealer, at its option, will repair or replace any part that, upon examination, is found to be defective under normal
use and service. This warranty will not cover the following repairs and equipment:
• Normal Wear: Outdoor Power Equipment, like all mechanical devices, needs periodic parts and service to perform well. This warranty does not cover
repair when normal use has exhausted the life of a part or the equipment.
• Installation and Maintenance: This warranty does not apply to equipment or parts that have been subjected to improper or unauthorized installation
or alteration and modification, misuse, negligence, accident, overloading, improper maintenance, repair or storage so as, in our judgment, to adversely
affect its performance and reliability. This warranty also does not cover normal maintenance such as adjustments, cleaning and fuse replacement.
• Other Exclusions: This warranty excludes wear items or damage or malfunctions resulting from accidents, abuse, modifications, alterations, or
improper servicing. Accessory parts are excluded from the product warranty. This warranty excludes failures due to acts of God and other force
majeure events beyond the manufacturers control. Also excluded is used, reconditioned, and demonstration equipment. 198180E, Rev. C, 12/31/2006
BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC
JEFFERSON, WI, USA
12 BRIGGSandSTRATTON.COM
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