Brochures and Data Sheets

There’s no danger of the SerieS 300 ATS
transferring loads to a dead source because
the unique ASCO single-solenoid operator
derives power to operate from the source to
which the load is being transferred.
Easy-to-read flush-mounted control and
display
panel provides LED indicators
for switch position and source availability.
It also includes test and time-delay bypass
switches as standard features.
Standard engine exerciser for weekly
automatic testing of engine generator set
with or without load.
Adjustable time-delay feature prevents switch
from being activated due to momentary
utility power outages and generator dips.
Supplied with solid neutral termination.
Optional switched neutral pole available.
Accessory kits available.
Available for immediate delivery.
Now available for service entrance
applications. Contact ASCO for assistance.
UL Listed Withstand & Close-On Ratings
Maximum Reliability & Excellent Value
With a SerieS 300 Transfer Switch, you get a product backed by
ASCO Power Technologies, the industry leader responsible for virtually every
major technological advance in the Transfer Switch industry.
The ASCO
SerieS 300 was designed for one purpose–to automatically
transfer critical loads in the event of a power outage. Each and every
standard component was designed
by ASCO engineers for this purpose.
The rugged construction and proven performance of the ASCO
SerieS 300 assure the user of many years of complete reliability.
The
SerieS 300 is even designed to handle the extraordinary demands
placed on the switch when starting or restarting stalled motors and
switching high inrush loads.
ASCO’s
SerieS 300 modular, compact design makes it easy to install, inspect
and maintain. All parts are accessible from the front so switch contacts can
be easily inspected.
Features
The SerieS 300 is listed to UL 1008 standard for Transfer Switch
Equipment and CSA standard C22.2 for automatic transfer switches.
Meets NFPA 110 for Emergency and Standby Power Systems
and the National Electrical Code (NEC) Articles 700, 701 and 702.
30 through 3000 amps in a compact design.
Available to 600 VAC, single or three phase.
True double-throw operation: The single solenoid design is inherently
inter-locked and prevents contacts from stopping between sources
or from being in contact with both sources at the same time.
4
30 100,000 480v/60Hz 10,000
70 - 200 200,000 480v/60Hz 22,000
230 100,000 480v/60Hz 22,000
260, 400 200,000 480v/60Hz 42,000
600 200,000 600v/60Hz 42,000
600 200,000 480v/60Hz 50,000
600 200,000 240v/60Hz 65,000
800,1000,1200 200,000 600v/60Hz 65,000
1600, 2000 200,000 600v/60Hz 85,000
2600, 3000 200,000
600v/60Hz 100,000
Switch Ratings
Amps
Available Symmetrical Amperes RMS
When Used
With Current
Limiting Fuses
Maximum
Voltage
When Used
With Specific
Circuit Breakers
Notes: 1. Current – limiting fuse should be Class J type through 400 amps:
use Class L type above 400 - amp fuse rating
2. Refer to publication 1128 for specific manufacturer ’s breakers
series 300 Power Transfer Switches
Fig. 1: ASCO Power Transfer Switch rated
200 amperes shown in Type 3R enclosure