Generac Power Systems 004635-3 User manual

Automatic Transfer Switch
Owner’s Manual
ATS “HS” Type
Models: 004635-3
(200 Amp, 250 Volts)
and 004678-2
(100 Amp, 250 Volts)
This manual should remain with the unit.

Generac Power Systems, Inc., hereafter referred to as
the “manufacturer”, cannot anticipate every possible
circumstance that might involve a hazard. The warn-
ings 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 the
manufacturer does not specifically recommend,
ensure that it is safe for others. Also make sure the
procedure, work method or operating technique cho-
sen does not render the transfer switch unsafe.
Throughout this publication, and on tags and
decals affixed to the generator, DANGER, WARNING,
CAUTION and NOTE blocks are used to alert per-
sonnel to special instructions about a particular
operation that may be hazardous if performed incor-
rectly or carelessly. Observe them carefully. Their def-
initions are as follows:
After this heading, read instructions that, if not
strictly complied with, will result in personal
injury, including death, or property damage.
After this heading, read instructions that, if not
strictly complied with, may result in personal injury
or property damage.
After this heading, read instructions that, if not
strictly complied with, could result in damage to
equipment and/or property.
NOTE:
After this heading, read explanatory statements
that require special emphasis.
These safety warnings cannot eliminate the hazards
that they indicate. Common sense and strict compli-
ance with the special instructions while performing the
service are essential to preventing accidents.
Four commonly used safety symbols accompany the
DANGER, WARNING and CAUTION blocks. The type
of information each indicates follows:
This symbol points out important safety informa-
tion that, if not followed, could endanger personal
safety and/or property.
This symbol points out potential explosion hazard.
This symbol points out potential fire hazard.
This symbol points out potential electrical shock
hazard.
GENERAL HAZARDS
• Any AC generator that is used for backup power if
a NORMAL (UTILITY) power source failure occurs,
must be isolated from the NORMAL (UTILITY)
power source by means of an approved transfer
switch. Failure to properly isolate the NORMAL
and STANDBY power sources from each other may
result in injury or death to electric utility workers,
due to backfeed of electrical energy.
• Improper or unauthorized installation, operation,
service or repair of the equipment is extremely
dangerous and may result in death, serious per-
sonal injury, or damage to equipment and/or per-
sonal property.
• Extremely high and dangerous power voltages are
present inside an installed transfer switch. Any
contact with high voltage terminals, contacts or
wires will result in extremely hazardous, and pos-
sibly LETHAL, electric shock. DO NOT WORK ON
THE TRANSFER SWITCH UNTIL ALL POWER
VOLTAGE SUPPLIES TO THE SWITCH HAVE
BEEN POSITIVELY TURNED OFF.
• Competent, qualified personnel should install,
operate and service this equipment. Adhere strict-
ly to local, state and national electrical and build-
ing codes. When using this equipment, comply
with regulations the National Electrical Code
(NEC), CSA Standard; C22.1 Canadian Electric
Code and Occupational Safety and Health
Administration (OSHA) have established.
• Never handle any kind of electrical device while
standing in water, while barefoot, or while hands
or feet are wet. DANGEROUS ELECTRICAL
SHOCK MAY RESULT.
!
!
!
DANGER
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS! Read the following information carefully before attempting to
install, operate or service this equipment. Also read the instructions and information on tags,
decals, and labels that may be affixed to the transfer switch. Replace any decal or label that
is no longer legible.
DANGER! Connection of a generator to an electrical system normally supplied by an electric
utility shall be by means of suitable transfer equipment so as to isolate the electric system
from utility distribution system when the generator is operating (Article 701 Legally Required
Standby Systems or Article 702 Optional Standby Systems, as applicable). Failure to isolate
electric system by these means may result in damage to generator and may result in injury
or death to utility workers due to backfeed of electrical energy.
!
!
!
!

Table of Contents
1
Safety Rules..........................................Inside Front Cover
Section 1 — General Information ..................................2
1.1 Introduction ............................................................2
1.2 Equipment Description ............................................2
1.3 Transfer Switch Data Decal......................................2
1.4 Transfer Switch Enclosure ......................................2
1.5 Safe Use Of Transfer Switch ....................................2
Section 2 — Installation ....................................................3
2.1 Introduction to Installation ......................................3
2.2 Unpacking ................................................................3
2.3 Mounting ..................................................................3
2.4 Connecting Power Source and Load Lines................3
2.4.1 2-Pole Mechanism ..........................................3
2.5 Connecting Start Circuit Wires ................................4
Section 3 — Operation ......................................................4
3.1 Functional Tests & Adjustments ..............................4
3.2 Manual Operation ....................................................4
3.2.1 Close to Normal Source Side ........................4
3.2.2 Close to Emergency Source Side....................5
3.2.3 Return to Normal Source Side ......................5
3.3 Voltage Checks..........................................................5
3.4 Generator Tests Under Load ....................................6
Section 4 – Notes................................................................7
Section 5 – Installation Diagram..................................10
Section 6 – Electrical Data ............................................11
Section 7 – Exploded Views & Parts Lists ..................14
Section 8 – Warranty/Service........................Back Cover
• Remove all jewelry (such as rings, watches,
bracelets, etc.) before working on this equipment.
• If work must be done 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.
• Keep the transfer switch enclosure door closed and
bolted at all times. Only qualified personnel
should be permitted access to the switch interior.
• In case of an accident caused by electric shock,
immediately shut down the source of electrical
power. If this is not possible, attempt to free the
victim from the live conductor but AVOID DIRECT
CONTACT WITH THE VICTIM. Use a nonconduct-
ing implement, such as a dry rope or board, to free
the victim from the live conductor. If the victim is
unconscious, apply first aid and get immediate
medical help.
• When an automatic transfer switch is installed for
a standby generator set, the generator engine may
crank and start at any time without warning. To
avoid possible injury that might be caused by such
sudden start-ups, the system’s automatic start cir-
cuit must be disabled before working on or around
the generator or transfer switch. Then place a “DO
NOT OPERATE” tag on the transfer switch and on
the generator. Remove the Negative (Neg) or (–) bat-
tery cable.
For authorized service,
reference the dealer locator
number found inside the
generator owner’s manual.

2
Section 1 — General Information
ATS “HS” Type Transfer Switch
1.1 INTRODUCTION
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 the 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 appli-
cation, or improper procedures.
Every effort has been expended to make sure that the
contents of this manual are both accurate and cur-
rent. The manufacturer, however, reserves the right
to change, alter or otherwise improve the product at
any time without prior notice.
1.2 EQUIPMENT DESCRIPTION
The automatic transfer switch is used for transfer-
ring electrical load from a UTILITY (NORMAL) power
source to a EMERGENCY ( STANDBY) power source.
Such a transfer of electrical loads occurs automati-
cally when the UTILITY power source has failed or is
substantially reduced and the EMERGENCY 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 EMERGENCY sources) and, for that
reason, codes require it in all standby electric system
installations.
The transfer switch consists of a transfer mecha-
nism, a relay control, and a terminal strip for con-
nection of sensing wires.
This switch is suitable for control of motors, electric
discharge lamps, tungsten filament and electric heat-
ing equipment and the tungsten load does the switch
rating.
The transfer switch is for use in optional standby sys-
tems only.
The transfer switch is suitable for use on a circuit
capable of 10,000 rms symmetrical amperes, 240
VAC when protected by a circuit breaker without an
adjustable short time response or by fuses.
1.3 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.
Record the Model and Serial numbers in the space pro-
vided below for future reference.
1.4 TRANSFER SWITCH ENCLOSURE
The standard switch enclosure is a National
Electrical Manufacturer’s Association (NEMA) 3R
type. NEMA 3R type enclosures primarily provide a
degree of protection against falling rain and sleet and
is not damaged by the formation of ice on the
enclosure.
1.5 SAFE USE OF TRANSFER SWITCH
Before installing, operating or servicing this equip-
ment, read the SAFETY RULES (inside front cover)
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 are posted near the transfer switch.
Also, be sure to read all instructions and information
found on tags, labels and decals affixed to the equip-
ment.
Two 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
MODEL #
SERIAL #

3
2.1 INTRODUCTION TO INSTALLATION
This equipment has been wired and tested at the fac-
tory. Installing the switch includes the following pro-
cedures:
• Mounting the enclosure.
• Connecting power source and load leads.
• Connecting the generator start circuit.
• Connecting any auxiliary contact (if needed)
• Testing functions.
2.2 UNPACKING
Carefully unpack the transfer switch. Inspect closely
for any damage that might have occurred during ship-
ment. 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.
2.3 MOUNTING
Mounting dimensions for the transfer switch enclo-
sure are in this manual. Enclosures are typically
wall-mounted. See “Installation Diagram”, Section 5.
Handle transfer switches carefully when
installing. Do not drop the switch. Protect the
switch against impact at all times, and against
construction grit and metal chips. Never
install a transfer switch that has been dam-
aged.
Install the transfer switch as close as possible to the
electrical loads that are to be connected to it. Mount
the switch vertically to a rigid supporting structure.
To prevent switch distortion, level all mounting
points. If necessary, use washers behind mounting
holes to level the unit.
2.4 CONNECTING POWER SOURCE
AND LOAD LINES
Make sure to turn OFF both the UTILITY
(NORMAL) and EMERGENCY (STANDBY)
power supplies before trying to connect
power source and load lines to the transfer
switch. Supply voltages are extremely high
and dangerous. Contact with such high volt-
age power supply lines will result in an
extremely hazardous, possibly lethal, electri-
cal shock.
Wiring diagrams and electrical schematics are pro-
vided in this manual. Power source and load connec-
tions are made at a transfer mechanism, inside the
switch enclosure.
2.4.1 2-POLE MECHANISM
These switches (Figure 2.1) are used with a single-
phase system, when the single-phase NEUTRAL line
is to be connected to a Neutral Lug and is not to be
switched.
Figure 2.1 — Typical 2-Pole Transfer Mechanism
(200 Amp Shown)
Solderless, screw-type terminal lugs are standard.
Conductor sizes must be adequate to handle the max-
imum current to which they will be subjected to,
based on the 75°C column of tables, charts, etc. used
to size conductors. The installation must comply fully
with all applicable codes, standards and regulations.
Before connecting wiring cables to terminals, remove
any surface oxides from the cable ends with a wire
brush. All power cables should enter the switch next
to transfer mechanism terminals. If ALUMINUM con-
ductors are used, apply corrosion inhibitor to con-
ductors. Tighten terminal lugs to the torque values as
noted on the decal located on the inside of the door.
After tightening terminal lugs, carefully wipe away
any excess corrosion inhibitor.
All power cables should enter the switch next to the
transfer mechanism terminals.
Use a torque wrench to tighten the conduc-
tors, being sure not to over tighten, or dam-
age to the switch base could occur. If not
tightened enough, a loose connection would
result, causing excess heat which could dam-
age the switch base.
!
UTILITY
CLOSING
COIL
GENERATOR
CLOSING
COIL
UTILITY LUGS
GENERATOR
LUGS (E1 & E2)
LOAD LUGS (T1 & T2)

DANGER
!
Section 2 — Installation
GTS “HS” Type Transfer Switch
Switch Wire Conductor Tightening
Rating Range Torque
100A #14-1/0 AWG 50 in-lbs.
200A #6-250 MCM 275 in-lbs.

4
Section 3 — Operation
ATS “HS” Type Transfer Switch
Connect power source load conductors to clearly
marked transfer mechanism terminal lugs as follows
1. Connect UTILITY (NORMAL) power source cables
to switch terminals N1, N2.
2. Connect EMERGENCY (STANDBY) source power
cables to transfer switch terminals E1, E2.
3. Connect customer LOAD leads to switch termi-
nals T1, T2.
Conductors must be properly supported, of approved
insulative qualities, protected by approved conduit,
and of the correct wire gauge size in accordance with
applicable codes.
Be sure to maintain proper electrical clearance
between live metal parts and grounded metal. Allow
at least 1/2 inch for 100-400 amp circuits.
2.5 CONNECTING START CIRCUIT
WIRES
Control system interconnections (Section 6) consist
of UTILITY 1 (N1) and UTILITY 2 (N2), LOAD 1 (T1)
and LOAD 2 (T2), and leads 23 and 194 when used
in conjunction with some water-cooled generators.
Recommended wire gauge sizes for this wiring
depends on the length of the wire, as recommended
below:
NOTE:
If there are no matching terminal connections for
LOAD 1 (T1) and LOAD 2 (T2) in the generator
control panel, do not connect these wires. Failure
of the control board will occur if connected.
3.1 FUNCTIONAL TESTS AND
ADJUSTMENTS
Following transfer switch installation and inter-
connection, inspect the entire installation careful-
ly. A competent, qualified electrician should
inspect it. The installation should comply strictly
with all applicable codes, standards, and regula-
tions. When absolutely certain the installation is
proper and correct, complete a functional test of
the system.
Perform functional tests in the exact order
presented in this manual, or damage could be
done to the switch.
IMPORTANT: Before proceeding with functional
tests, read and make sure all instructions and infor-
mation in this section are understood. Also read the
information and instructions of labels and decals
affixed to the switch. Note any options or accessories
that might be installed and review their operation.
3.2 MANUAL OPERATION
Do NOT manually transfer under load.
Disconnect transfer switch from all power
sources by approved means, such as a main
circuit breaker(s).
A manual HANDLE is shipped with the transfer
switch. Manual operation must be checked BEFORE
the transfer switch is operated electrically. To check
manual operation, proceed as follows:
1. Turn the generator’s AUTO-OFF-MANUAL switch
to OFF.
2. Turn OFF both UTILITY and EMERGENCY
power supplies to the transfer switch, with what-
ever means provided (such as the main line cir-
cuit breakers).
3. Note position of transfer mechanism main con-
tacts by observing the moveable contact carrier
arm.
• Manual operation handle towards the top of
switch mechanism - LOAD terminals (T1, T2) are
connected to UTILITY terminals (N1, N2).
• Manual operation handle towards the bottom of
switch mechanism - LOAD terminals (T1, T2) are
connected to EMERGENCY terminals (E1, E2).
Do not use excessive force when operating
the transfer switch manually or damage could
be done to the manual handle.
3.2.1 CLOSE TO NORMAL SOURCE SIDE
Before proceeding, verify the position of the switch by
observing the position of manual operation handle in
Figure 3.1. If the handle is UP, the contacts are closed
in the NORMAL position, no further action is
required. If the handle is DOWN, proceed with Step
1.
Step 1: With the handle inserted into the actuating
shaft, move handle UP. Be sure to hold on to
the handle as it will move quickly after the
center of travel.
◆
!
!
DANGER
!
MAXIMUM WIRE LENGTH RECOMMENDED WIRE
SIZE
460 feet (140m) No. 18 AWG.
461 to 730 feet (223m) No. 16 AWG.
731 to 1,160 feet (354m) No. 14 AWG.
1,161 to 1,850 feet (565m) No. 12 AWG.

5
3.2.2 CLOSE TO EMERGENCY SOURCE SIDE
Before proceeding, verify the position of the switch by
observing the position of the manual operation han-
dle in Figure 3.1. If the handle is DOWN, the contacts
are closed in the EMERGENCY (STANDBY) position.
No further action is required. If the handle is UP, pro-
ceed with Step 1.
Step 1: With the handle inserted into the actuating
shaft, move the handle DOWN. Be sure to
hold on to the handle as it will move quickly
after the center of travel.
3.2.3 RETURN TO NORMAL SOURCE SIDE
Manually actuate switch to return manual operating
handle to the UP position.
3.3 VOLTAGE CHECKS
1. Turn ON the UTILITY power supply to the trans-
fer switch with whatever means provided (such as
the UTILITY main line circuit breaker).
PROCEED WITH CAUTION. THE TRANSFER
SWITCH IS NOW ELECTRICALLY HOT. CONTACT
WITH LIVE TERMINALS RESULTS IN EXTREMELY
HAZARDOUS AND POSSIBLY FATAL ELECTRI-
CAL SHOCK.
2. With an accurate AC voltmeter, check for correct
voltage.
Single-phase utility supply:
Measure across ATS terminal lugs N1 and N2.
Also check N1 to NEUTRAL and N2 to NEUTRAL.
3. When certain that UTILITY supply voltage is cor-
rect and compatible with transfer switch ratings,
turn OFF the UTILITY supply to the transfer
switch.
4. On the generator panel, set the AUTO-OFF-
MANUAL switch to MANUAL position. The gener-
ator should crank and start.
5. Let the generator stabilize and warm up at no-
load for at least five minutes.
6. Set the generator's main circuit breaker (CB1) to
its ON or CLOSED position.
DANGER
◆
◆
Section 3 — Operation
ATS “HS” Type Transfer Switch
Attach handle to actuating shaft.
Move handle
UP for the
NORMAL
(UTILITY)
position.
Move handle
DOWN for the
EMERGENCY
(STANDBY)
position.
NOTE: Return handle to
storage position in enclosure
when finished with manual transfer.
Figure 3.1 — Actuating Transfer Switch

6
PROCEED WITH CAUTION. GENERATOR OUT-
PUT VOLTAGE IS NOW BEING DELIVERED TO
TRANSFER SWITCH TERMINALS. CONTACT
WITH LIVE TERMINALS RESULTS IN EXTREMELY
DANGEROUS AND POSSIBLY FATAL ELECTRI-
CAL SHOCK.
7. With an accurate AC voltmeter and frequency
meter, check the no-load, voltage and frequency.
Single-phase generator supply:
Measure across ATS terminal lugs E1 to E2. Also
check E1 to NEUTRAL and E2 to NEUTRAL.
a. Frequency ......................................60-62 Hertz
b. Terminals E1 to E2 ........................240-246 VAC
c. Terminals E1 to NEUTRAL ............120-123 VAC
d. Terminals E2 to NEUTRAL ............120-123 VAC
8. Set the generator’s main circuit breaker (CB1) to
its OFF or OPEN position.
9. Set the AUTO/OFF/MANUAL switch to the OFF
position to shut down the generator.
NOTE:
Do NOT proceed until generator AC output voltage
and frequency are correct and within stated limits.
If the no-load voltage is correct but no-load fre-
quency is incorrect, the engine governed speed
probably requires adjustment. If no-load frequen-
cy is correct but voltage is not, the voltage regula-
tor may require adjustment.
3.4 GENERATOR TESTS UNDER LOAD
1. Set the generator's main circuit breaker to its
OFF or OPEN position.
2. Manually actuate the transfer switch main con-
tacts to their EMERGENCY (STANDBY) position.
Refer to Manual Operation (Section 3.2).
3. To start the generator, set the AUTO-OFF-
MANUAL switch to MANUAL. When engine starts,
let it stabilize for a few minutes.
4. Turn the generator's main circuit breaker to its
ON or CLOSED position. The generator now pow-
ers all LOAD circuits. Check generator operation
under load as follows:
• Turn ON electrical loads to the full rated
wattage/amperage capacity of the generator.
DO NOT OVERLOAD.
• With maximum rated load applied, check
voltage and frequency across transfer switch
terminals E1 and E2. Voltage should be
greater than 230 volts and frequency should
be greater than 59 Hertz.
• Let the generator run under rated load for at
least 30 minutes. With unit running, listen for
unusual noises, vibration, overheating, etc.,
that might indicate a problem.
5. When checkout under load is complete, set main
circuit breaker of the generator to its OFF or
OPEN position.
6. Let the generator run at no-load for several
minutes. Then, shut down by setting the AUTO-
OFF-MANUAL switch to its OFF position.
7. Move the switch's main contacts back to their
UTILITY position. For example, load connected to
UTILITY power supply. Refer to Manual
Operation (Section 3.2). Handle and operating
lever of transfer switch should be in UP position.
8. Turn on the UTILITY power supply to transfer
switch, using whatever means provided (such as
a UTILITY main line circuit breaker). The UTILI-
TY power source now powers the loads.
9. Set the generator's AUTO-OFF-MANUAL switch to
its AUTO position. The system is now set for fully
automatic operation.
DANGER
Section 3 — Operation
ATS “HS” Type Transfer Switch

7
Section 4 — Notes
ATS “HS” Type Transfer Switch

8
Section 4 — Notes
ATS “HS” Type Transfer Switch

9
Section 4 — Notes
ATS “HS” Type Transfer Switch

Section 5 — Installation Diagram
ATS “HS” Type Transfer Switch
Drawing No. 0E7081
3
77mm
[
14.84"
]
5
08.5mm
[
20.02"
]
KN
OC
K
OU
T
SU
ITABLE F
OR
1
"
,
1-1/2" AND 2" CONDUIT SIZE
3
PLA
C
E
S
1
79.5mm
[
7.07"
]
4
20mm
[
16.54"
]
4
5mm
[
1.77"
]
4
1.5mm
[
1.63"
]
2
94mm
[
11.57"
]
Ø
6
.3mm
[
Ø
0
.25"
]
10

11
-
OPEN SWITCH TO TEST -
2
A
@
2
50
Vac MIN.
S
WITCH TYPE
,
SPST
E
LECTRICAL RATINGS
,
NO
TE
:
I
F THERE ARE NO MATCHING TERMINAL CONNECTIONS FOR LOAD 1
(
T1
)
AND
L
OAD 2
(
T2
)
IN THE GENERATOR CONTROL PANEL DO NOT CONNECT THESE
W
IRES
,
FAILURE OF THE CONTROL BOARD WILL OCCUR IF CONNECTED.
U
TILITY 1
(
N1
)
U
TILITY 2
(
N2
)
L
OAD 2 (T2)
23
19
4
C
B1
N
E
U
TRAL
CO
NNE
C
TI
O
N
N1 N2
T1 T2
2
T
E1 E2
2
E
N
E
U
TRAL
LUG
T
RAN
S
FER
S
WIT
CH
U
TILITY
SU
PPLY WIT
H
S
ERVI
C
E DI
SCO
NNE
C
T
LO
AD
CUS
T
O
MER
194
23
LO
AD 2
UTILITY
2
UTILITY
1
AC
G
ENERAT
O
R
CO
NTR
O
L PANEL
NO
TE:
PO
WER LEAD
S
AND
T
RAN
S
FER
S
WIT
C
H
L
EAD
S
M
US
T B
E
RU
N IN TW
O
D
IFFERENT
CO
ND
U
IT
S
.
L
OAD 1
(
T1
)
22
LO
AD 1
R
EM
O
TE TE
S
T
S
WITCH
(
OPTIONAL
)
11
44
33
Section 6 — Electrical Data
ATS “HS” Type Transfer Switch
Transfer Switch Interconnections - Drawing No. 074106-B

12
Section 6 — Electrical Data
ATS “HS” Type Transfer Switch
Electrical Schematic - Drawing No. 0E6093-B

13
Section 6 — Electrical Data
ATS “HS” Type Transfer Switch
Electrical Schematic - Drawing No. 0E6093-B

14
6
9
8
16
3
7
21
7
3
23
15
24
4
36
2
194
25
28
N
E
U
TRAL
29
17
18
13
14
11
13
40
26
19
10
20
22
3
2
3
1
35
5
30
39
33
3
4
12
1
3
2
4
30A,600V
30A,
600V
073591
-
T
073591T
30A,600V
30A,
600V
073591
-
T
073591T
30A,600V
30A,
600V
073591
-
T
073591T
30A,600V
30A,
600V
073591
-
T
073591T
E
N
C
L
OSU
RE
(
GROUND LUG ASSEMBLY
)
(
POWER TERMINAL LUG ASSEMBLY
)
N
OTE: TOR
Q
UE ITEM #3 TO 24-30 IN.LBS
DETAIL B
-
B
A
A
B
B
0
A
95
17
W
AUKE
S
HA
,
WI.
O
R AL
U
MIN
U
M WIRE
O
F AT LEA
S
T 7
5
°
C
RATIN
G
R
ATIN
G
S
WIT
C
H
G
ENERAC POWER SYSTEMS
,
INC.
1
2
0/
24
0
CS3-8X16T
CS38X16T
8X16T
***
(
C2 & VR2
)
S
TANDBY
0C
22
3
7fv
*****
****
*****
*****
**
Section 7 — Exploded Views and Parts List
ATS “HS” Type Transfer Switch
100A Transfer Switch Assembly – Drawing No. 0E8403$-F

15
ITEM PART NO. QTY. DESCRIPTION
1 0C2237 1 TR SW-HSB 100A 2P 250V
2 077033 6 LUG SLDLSS 1/0-#14X9/16 AL/CU
3 036932 6 SCREW PPHM #10-32 X 1/4
4 022152 6 WASHER LOCK #10
5 074908 4 SCREW HHTT M5-0.8 X 10 BP
6 045771 1 NUT HEX M8-1.25 G8 YEL CHR
7 062684 1 LUG SLDLSS 2/0-#12 X 11/32 CU
8 0C3168 1 WASHER LOCK SPECIAL 5/16
9 022129 1 WASHER LOCK M8-5/16
10 073590A 4 FUSE 5A X BUSS
11 073591 4 FUSE HOLDER
12 090388 2 SCREW HHTT M6-1.0 X 12 ZINC
13 0A1495 6 SCREW HHTT M4-0.7 X 10 BP
14 063617 1 RELAY PNL 12VDC DPDT 10A@240VA
15 0C2454 2 SCREW TH-FRM M6-1 X 16 N WA Z/JS
16 0A1661 2 RIVET POP .156 X .675 AL
17 0C4449 1 ASSY NEUTRAL BLOCK 100A
18 0E6057 1 WELDMENT XFER SW BOX HSB
19 0E6056 1 COVER TRANSFER SWITCH BOX HSB
20**** 0F0668 1 DECAL TRANSFER SWITCH
21 0A2595 1 DECAL TERMINAL STRIP
22 0E8443 1 DECAL SWITCH RATING
23*** 095282 1 DECAL-LIVE CIRCUIT
24 067210A 1 DECAL GROUND LUG
25 0A9457 1 DECAL NEUTRAL
26 0A9517 1 DECAL MANUAL 5A FUSE
27* 077036D 1 DECAL TEST SEQUENCE 3R
28 081221 1 DECAL-UL LIST HSB
29 064101 4 NUT HEX FL WHIZ 3/8-16
30 0E6055 1 SUBPLT TRANSFER SWITCH HSB
31***** 063378 4 HOLDER CABLE TIE
32***** 028739 4 TIE WRAP UL 3.9" X .10" NATL
33 0E6193 1 BRACKET, ARM EXTENDER
34** 0E6155 0 ARM EXTENDER PIN
35 0E6303 1 WIRE A
36 0E6303A 1 WIRE B
37 0E6303C 1 WIRE E1
38 0E6094 1 WIRE HARNESS 100/200A 2P HS (NOT SHOWN)
39 064526 2 SCREW HWHS #6-25 X 3/8 ZNC
40 0F2088 1 DECAL TRANSFER SWITCH DATA 100
* CENTER DECAL ON INSIDE OF THE COVER (ITEM #19)
** SUPPLIED WITH TRANSFER SWITCH ITEM #1.
*** PLACE DECAL ON OUTSIDE OF COVER, LOWER RIGHT CORNER.
**** NOT SHOWN ON THIS ASSEMBLY, CENTER DECAL ON FRONT OF COVER, 7" FROM TOP OF ENCLOSURE.
***** SUPPLIED WITH HARNESS (P/N 0E6094).
Section 7 — Exploded Views and Parts List
ATS “HS” Type Transfer Switch
100A Transfer Switch Assembly – Drawing No. 0E8403$-F

N
E
UT
30
8
6
9
20
19
7
15
22
3
1
13
21
16
11
10
PT/NO A2595
5
5
LO
AD 2
LO
AD 1
UTILITY
2
UTILITY
1
194
23
4
1
29
4
2
A
C
A
A
A
26
23
28
14
13
18
A
27
40
35
33
24
A
12
17
38
3
4
36
3
A
5
25
2
1
4
05
7
3
2
9
-
S
E
N
C
L
OSU
RE
(
GROUND LUG ASSEMBLY
)
DETAIL A
-
A
3
T
O
72
±
1
IN-LB
S
N
OTE: TOR
Q
UE ITEM
CS
C
CS3-8X16T
8X16
CS3-8X16T
C
8X16
22097S
WS34X14S
0
A
95
17
S
Y
S
TEM V
O
LTA
G
E
1
2
0/
24
0
S
ERIAL N
U
MBER
***
*****
63378T
63378
-
T
****
*****
*****
**
16
Section 7 — Exploded Views and Parts List
ATS “HS” Type Transfer Switch
200A Transfer Switch Assembly – Drawing No. 0E5782$-J

17
Section 7 — Exploded Views and Parts List
ATS “HS” Type Transfer Switch
200A Transfer Switch Assembly – Drawing No. 0E5782$-J
ITEM PART NO. QTY. DESCRIPTION
1 0D9618 1 TR SW-HSB 200A 2P 250V
2 0E3375 6 LUG SLDLSS 250-#6 AL/CU
3 0F1252 6 SCREW BHSC 1/4-20 X 3/8
4 022097 6 WASHER LOCK M6-1/4
5 066849 5 SCREW HHTT M5-0.8 X 16 BP
6 045771 1 NUT HEX M8-1.25 G8 YEL CHR
7 057329 1 LUG SLDLSS 350-#6 X 13/32 AL/CU
8 027482 1 WASHER SHAKEPROOF EXT 5/16 STL
9 022129 1 WASHER LOCK M8-5/16
10 073590A 4 FUSE 5A X BUSS
11***** 073591 4 FUSE HOLDER
12 090388 2 SCREW HHTT M6-1.0 X 12 ZINC
13 0A1495 6 SCREW HHTT M4-0.7 X 10 BP
14***** 063617 1 RELAY PNL 12VDC DPDT 10A@240VA
15 0C2454 2 SCREW TH-FRM M6-1 X 16 N WA Z/JS
16 0A1661 2 RIVET POP .156 X .675 AL
17 0C4449A 1 ASS'Y-NTRL BL150-200A
18 0E6057 1 WELDMENT XFER SW BOX HSB
19 0E6056 1 COVER TRANSFER SWITCH BOX HSB
20**** 0F0668 1 DECAL TRANSFER SWITCH
21 0A2595 1 DECAL TERMINAL STRIP
22*** 095282 1 DECAL-LIVE CIRCUIT
23 0E8443 1 DECAL SWITCH RATING
24 064101 4 NUT LOCK FL 3/8-16
25 0E6055 1 SUBPLT TRANSFER SWITCH HSB
26***** 063378 5 HOLDER CABLE TIE
27***** 028739 5 TIE WRAP UL 3.9" X .10" NATL
28 0F2516 1 DECAL TRANSFER SWITCH DATA 200
29 067210A 1 DECAL GROUND LUG
30 0A9457 1 DECAL NEUTRAL
31 0A9517 1 DECAL MANUAL 5A FUSE
32 * 0E6190 1 DECAL TEST SEQUENCE 2P TS 3R
33 081221 1 DECAL-UL LIST HSB
34 0E6193 1 BRACKET ARM EXTENDER
35 064526 2 SCREW HWHS #6-25 X 3/8 ZNC
36 ** 0E6155 1 ARM EXTENDER PIN
37 0E6094 1 HARN 100/200A 2P HS
38 ** 0E6033 2 90 DEGREE DN SPADE CONNECTOR
40 0E6303 1 WIRE A
41 0E6303A 1 WIRE B
42 0E6303B 1 WIRE-E1
* CENTER DECAL ON INSIDE OF THE COVER (ITEM #19)
** SUPPLIED WITH TRANSFER SWITCH ITEM #1.
*** PLACE DECAL ON OUTSIDE OF COVER, LOWER RIGHT CORNER.
**** NOT SHOWN ON THIS ASSEMBLY, CENTER DECAL ON FRONT OF COVER, 7" FROM TOP OF ENCLOSURE.
***** SUPPLIED WITH HARNESS (P/N 0E6094)

Part No. 0E6347 Revision H (02/09/05) Printed in U.S.A.
Section 8 — Warranty
ATS “HS” Type Transfer Switch
GENERAC POWER SYSTEMS, INC. WARRANTY/SERVICE
Generac Power Systems, Inc. will warrant from the date of purchase that our transfer
switch will be free from defects in material and workmanship for the items and periods set
forth in the warranty statement found in the owners manual of the Generac Power Systems
Inc. generator that this transfer switch will be utilized with.
Any equipment that the purchaser/owner claims to be defective must be examined by the
nearest Generac Authorized Warranty Service Dealer which may be found by visiting our
website at www.generac.com or by calling the dealer locator number at 1-800-333-1322.
Select the prompt that describes the brand name of the generator.
THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
SPECIFICALLY, GENERAC MAKES NO OTHER WARRANTIES AS TO THE
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Some states do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you.
GENERAC’S ONLY LIABILITY SHALL BE THE REPAIR OR REPLACEMENT OF PART(S)
AS STATED ABOVE. IN NO EVENT SHALL GENERAC POWER SYSTEMS, INC. BE
LIABLE FOR ANY INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF SUCH
DAMAGES ARE A DIRECT RESULT OF GENERAC’S NEGLIGENCE.
Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitations may not apply to you.
This warranty gives you specific legal rights. You also may have other rights that vary from
state to state.
GENERAC®POWER SYSTEMS, INC.
P.O. BOX 297 • WHITEWATER, WI 53190