IB01602008E For more information visit: www.eaton.com
Instructional Booklet
Effective: March 2014 Page 29
ATC-300 Breaker Based Transfer Switch
Step 4: While holding the wire in place, pull the screwdriver out.
The wire will now be held securely in the terminal block.
Pull on the wire to insure that it is correctly inserted into
the clamp.
Figure 30.Wire Securely Installed in the Terminal Block.
Section 5: Operation
5.1 General
An ATS provides main contacts to connect and disconnect the
load to and from the Source 1 and Source 2 power sources (Sec-
tion 3.2.2). Each transfer mechanism provides the mechanical
motion required to open and close the mechanically interlocked
main contacts (Section 3.2.3).
Note that the transfer mechanisms for the two types of ATSs
described in this booklet (30-150 A and 225-1200 A) are different
for both the manual and automatic modes.
IF AN ATS WITH ANY TYPE OF ELECTRICAL OPERATING CAPABILI-
TIES IS TO BE OPERATED UTILIZING THE MANUAL OPERATING HAN-
DLE, IT IS STRONGLY RECOMMENDED THAT THE TRANSFER MOTOR
CIRCUIT FIRST BE ISOLATED. THIS IS ACCOMPLISHED BY UNPLUG-
GING THE (P3) PLUG MARKED MOTOR DISCONNECT (FIGURE 31).
ANY ATTEMPT TO USE THE MANUAL OPERATING HANDLE WITHOUT
FIRST ISOLATING THE MOTOR CIRCUIT CAUSES AN AUTOMATIC
TRANSFER.
Figure 31.Motor Disconnect P3 must be disconnected.
NOTICE
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