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A properly rated and installed double throw manual power
isolation transfer switch must be used with a standby genera-
tor. The transfer switch isolates the load from the power line
and allows you to safely operate your loads without endanger-
ing the power line repair crew. See page 4.
The load, connected to the normal terminals of the transfer
switch, is energized by the normal power line when the switch
is in the normal position. The generator, connected to the
emergency terminals of the switch, furnishes power when the
switch is in the emergency mode position.
There are two ways to install a manual transfer switch. The
first shown on the left side of page 4 is to install the switch
between the watt-hour meter and the normal distribution panel.
As with any system you must install an entrance rated breaker
before the manual transfer switch. The manual transfer switch
must in all cases be equal to or greater than the rating of the
entrance rated breaker.
The second way to install the system is to purchase and install
an emergency distribution panel and move the circuits you
wish to back up to the new distribution panel. In this case the
manual transfer switch only has to be sized to the amperage of
the circuit breaker in the main distribution panel that is feeding
it. See the right hand drawing on page 4
Before deciding which system to install, first determine which
loads you can safely run on your PTO generator and the cost
of buying a large manual transfer switch versus the cost of a
smaller switch and the additional distribution panel.
The final item that you are going to have to assembly/wire is
the plug that will be used to connect the generator to the
manual transfer switch. You should have found this load plug
in a small box when you unpacked the PTO generator. If you
need additional plugs for multiple sites you can order additional
plugs from your Winco dealer, the part number is “300137”.
WARNING: Personal Injury
DISCONNECT POWER BEFORE WIRING
IMPORTANT: Use copper wire only. Do not use tinned
conductors. Sizing cable - see NEC 400-5.
CORD SIZE: #4/4 conductor cord SO, 1.25 inch dia. max.
Figure 2
To assemble and wire the load disconnect plug, proceed as
follows:
1.
Strip outer jacket 2-3/4”.
2.
Cut and strip leads to lengths specified for the
particular plug.
3.
Disassemble cable clamp and top cover.
4.
Remove one blade at a time, insert the stripped end
of the appropriate colored wire designated above,
and tighten the set screw.
5.
Fit blades through slots in bottom cover and push
down until home. Please note: Make sure blades
are in correct slots and oriented in accordance with
the diagram above or you will not be able to close
the top cover fully.
6.
Place top plastic cover over assembly and partially
tighten the bakelite assembly screw. Realign
blades straight (so they fit into the top bakelite
housing properly) and tighten the assembly screw.
7.
Assemble cable clamp over the outer jacket of the
wire and tighten the two clamp screws.
Special Note: For small size round (less than 3/4”) and flat
cables, the wire clamp may be inverted.
WARNING: Failure to wire as instructed may cause
personal injury or damage to device or equipment. To be
installed or checked by an electrician or qualified person
only.
PRE-START CHECKS
WARNING: Personal Injury
When working on or around these generators, do not wear
loose fitting clothing or any articles that may get caught in
moving parts.
1. Visually inspect the generator. Check for:
a
Correct mounting
b. Physical damage
c. Debris in cooling vents and screens (could
cause generator to overheat).
IMPORTANT: The manufacturer recommends that, if the gen-
erator has been stored for any length of time, before using it,
the operator remove the control box cover and cooling fan
screen, then inspect the generator for rodent nests or other ob-
jects that could cause generator binding and/or overheating.
See “Cleaning” portion of Maintenance section.
2. Check gear case oil level. (See
Figure 4.) Case should be filled
with oil to plug marked “OIL
LEVEL.” Fill or remove oil as
required.
NOTE: EITHER TOO LITTLE OR
TOO MUCH OIL CAN HARM THE
EQUIPMENT.
See “Lubrication” portion of
Maintenance for oil specifications.
