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Asco 300 Series User Manual

Asco 300 Series
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INSTALLATION (continued)
1 --- 2
Engine Starting Contacts
The engine control contact connections are located on the
transfer switch. Connect signal wires to appropriate term–
inals as specified in Table A, shown in Figure 1–2.
Table A. Engine start connections.
When normal source
fails
Terminals on transfer
switch
contact closes TB14 and TB15
contact opens TB14 and TB16
Transfer Switch
Figure 1-2. Engine starting contact label and location
for 260 and 400 amp. E–design transfer switches.
Controller Ground
A grounding wire must be connected to the controller’s
lower left mounting stud. Because t he controller is
mounted on the enclosure 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.
Harnesses
The transfer switch is connected to the left side of the
controller by a plug–in harness (two plugs).
Auxiliary Circuits
Connect auxiliary circuit wires to appropriate terminals on
transfer switch. Note the control features that are fur-
nished on this switch. Make the necessary auxiliary
connections by referring to Section 5, Control Features.
Connections to Controller for other Control Features (located on bottom of Controller):
for factory
use only
Remote Control Features Connections
(refer to the Wiring Diagram &
page 5–5 for DIP switch settings)
Each control contact must be suitable
for a 5 V DC low energy circuit.
Programmable
Engine Exerciser
connection,
if provided
(refer to
page 5–2)
Load Disconnect
Feature
Connections
(see Wiring Diagram
& refer to page 5–5
for DIP switch settings)
Figure 1-3. Input / output label on t he Controller showing possible connections to the lower terminal block.

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Asco 300 Series Specifications

General IconGeneral
TypeAutomatic Transfer Switch
Poles2, 3, 4
Enclosure TypeNEMA 1, 3R, 4, 4X, 12
Amperage Range30-4000 Amps
CertificationsUL 1008, CSA
OperationAutomatic
Transfer TypeOpen, Closed, Delayed
Control PanelMicroprocessor-based
StandardsIEEE

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