Quantcast Figure 3-7.--Schematic and wiring diagram of ABT-1A2.
 

Click here to make tpub.com your Home Page

Page Title: Figure 3-7.--Schematic and wiring diagram of ABT-1A2.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

also has a manual switch for selecting the
capable of transferring the load between two
normal or emergency power sources and a test
sources of power available to the ABT. The two
switch.
sources are identified as normal (ship's service)
For purposes of explanation, the 3-phase
and alternate (ship's service) or normal (ship's
model  will  be  discussed.  The  ABT-1A2  is
service) and emer-gency (service).
designed to transfer automatically from normal
Three-way transfers indicate that the
to emergency supply upon a decrease in voltage
ABT is capable of transferring the load between
to within the 81- to 69-volt range across any two
three sources of power available to the ABT.
of its three phases in a 120-volt system. Upon
These three sources of power are identified as
restoration of the voltage to the range of 98 to
normal, alternate, and emergency. Either the
109 volts, the unit is adjusted to retransfer to
normal or alternate source may be selected as
the normal source of supply. An intentional time
the preferred source.
delay of 0.3 to 0.5 seconds is included in the
One of the more common ABTs used with IC
circuitry for both transfer and retransfer. This
switchboards is the ABT-1A2. This model operates on
allows for surges in line voltage and short
120-volt, 60-Hz, single- or 3-phase systems.
duration losses of power.
The ABT-1A2 (fig. 3-6) has a control
Automatic operation (refer to fig. 3-7) is
disconnect switch that allows the ABT to be
accomplished when the normal supply voltage drops
operated in the manual or automatic mode. It
Figure 3-7.--Schematic and wiring diagram of ABT-1A2.

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q Port Richey, FL 34668

Phone For Parts Inquiries: (727) 493-0744
Google +