Generac Power Systems 004877, Owner'S Manual, Page: 7 / 44

General Information
Integrated Load Center Owner’s Manual 3
Section 2: General Information
Unpacking
Carefully unpack the ILC. Closely inspect for any
shipping damage. The purchaser must file with the
carrier any claims for loss or damage incurred while in
transit.
Verify all packing material is completely removed from
the ILC prior to installation.
Attach an appropriate lifting device to the lifting eyes on
top of the enclosure. The ILC transfer switch weighs
about 350 lbs.
Equipment Description
The TTS (ILC) transfer switch is available in two
enclosure types: NEMA 1 for indoor applications (model
004877), and NEMA 3R for outdoor applications (model
004892).
Service Disconnect
This unit is equipped with a 200A circuit breaker for each
source of supply: utility and generator. This circuit
breaker can serve as the service disconnect for each.
Transient Voltage Surge Suppression
The Transient Voltage Surge Suppression (TVSS) is
provided to protect the load from electrical surges or
transient voltage spikes. This device is physically located
next to the service disconnect circuit breakers and
electrically connected to the load side of the service
disconnect. A TVSS module is always supplied to protect
the utility supply; the generator supply TVSS protection is
provided in some models. A 30A circuit breaker is
provided to disconnect the TVSS from the live ILC for
maintenance or replacement.
The TVSS is made up of multiple solid state Metal Oxide
Varistors (MOV) connected in parallel for each mode of
protection. These devices are equipped with integrated
short circuit and individual component level fusing. They
are self-resetting and fully automatic.
Modes of Protection
The TVSS provides protection on all modes:
• Single Phase (6): L-L, L-N, L-N, L-G, L-G and N-G.
Ratings
• Surge Capacity:100 kA per mode.
• Suppression Level (typical):
L-N = 330 V
L-G = 400 V
N-G = 400V
L-L = 700 V
Certification
The TVSS is UL recognized to the requirements of UL
1449 3rd edition.
TVSS Disconnect
Each TVSS is provided with a disconnect. The
disconnect is a 30A circuit breaker, 2-pole for single
phase. This is to allow replacement of the TVSS module
without interruption of the electrical supply to the load.
NOTE: Turn on the TVSS disconnect circuit breaker
when the procedure is complete. If the circuit breaker is
not turned on, the TVSS module will not provide any
surge protection for the customer load.
Status Indicators
Each TVSS module has comprehensive, solid state,
continual visual status monitoring of each protection
mode present. There are two LEDs provided, located on
the cover of the module. The green LED (left side) is
used to indicate that the TVSS module is energized and
in working order. The red LED (right side) will turn on in
the event the suppressor capability is exceeded or if
there is an internal safety component activating.
When the power is first applied, the unit does a brief
internal diagnostic test. During this test, the red LED will
illuminate briefly, turn off, and then the green LED will
illuminate.
For the power source to be available, the associated
service disconnect circuit breaker must be on, the
associated TVSS disconnect circuit breaker must be on,
and the associated source must be present.
WARNING
Personal injury. Excessive weight. Use only
appropriate lifting eyes and lifting equipment to
lift unit. Improper lifting techniques could result in
equipment damage, death or serious injury.
(000224)
(000225a)
WARNING
Electric shock. Only a licensed electrician
should work on an energized ATS-ILC. Work
performed by non-qualified persons could result
in death, serious injury, or equipment damage.