SECTION 1 INSTALLATION
1--1
The ASCO Series 200 automatictransfer switching
equipment (ATSE)consists of a transfer switching device,
monitoring and transfer control device (controller), and
membrane controls (for door mounting). The ATSEis
factory tested. Installation requiresmounting the devices
into an appropriate sizeenclosure and connection of
power conductors,engine start signal wires, and auxiliary
circuits.

Mounting

The Outline and Mounting Diagram furnished with the
ATSEshows all mounting detailsand instructions.
NOTICE

Protect the automatic transfer switching

equipment from construction grit and metal chips

to prevent malfunction or shortened life of the

transfer switching device.

Mountthe transfer switch vertically in the back of the
enclosureas shown on the Outline and Mounting
Diagramprovided. Level all mounting points of the
rigid supporting structure by using flat washers behind
the holesto avoid forced distortion of the transfer
switch.
Mount the membrane controls and the controlleron the
inside of the enclosure door as shownon the Out line
and Mounting Diagram provided. The membrane
controls mustbe a ccessiblet hrougha cutout inthe
door. Connectthe membrane controls to the right side
of the controllerwith the ribbon cable provided. Then
connect the transfer switching device harness plugs to
the left side of the controller. SeeFigures 1–1 and 1–2.
Anadd-on rail is provided for some optional accesso-
ries. Ifprovided, mounted it below the controller. Then
make the connections shown on the Wiring Diagram.

Grounding

Grounding (earthing) is accomplished by mounting the
automatictransfer switching equipment in a metal
enclosure. Connect the control panel grounding wire
(lower left side) to equipment (enclosure or clean earth)
ground. Thiswire can be connected to the controller’s
lower left mounting stud. Because the controller is
mounted on a door, a conductive strap must be used
between the enclosure and the door. This connection
provides proper grounding which does not rely upon the
door hinges. SeeFigure 1–3.
membrane
controls
ribbon
cable
controller
gasket
cut out in
enclosure
door
enclosure
door
controller
must be within a
steel enclosure
Figure 1-1. Membranecontrols and controller mount-
ing on inside of enclosure door. Refer to
Outline& Mounting Diagram for mounting hardware.
Figure 1-2. Membranecontrols with gasket
suitable for IP65 enclosure.
ribbon cable
to membrane
controls
ground
wire
mounting
stud
2 plugs for
transfer
switching
device
harness
connections
for control
features &
options
Figure 1-3. Controllergrounding (clean earth)
wire and other connections.
NOTICE

The controller must be grounded for proper

operation.