Blue Star Power Systems

Gaseous: 25-425 kWe
Diesel: 30-2500 kWe
Portables: 30-600kWe

> Learn more


Emergency Service Calls - Available 24/7 (read more)
  • Preventative Maintenance & Repairs
  • Load Bank Testing
  • Oil, Cooling, and Fuel Analysis
  • Control Upgrades
  • Complete System Monitoring Available
Need service? Fill out a Request Form


Houston, TX (Headquarters)
21855 E. Hammond Dr.
Porter, TX 77365 | Map
(281) 358-0980
(800) 370-3621
Send us a message
San Antonio, TX
7943 E. Evans Rd.
San Antonio, TX 78266 | Map
(210) 946-2474
(800) 370-3621
Send us a message
Home > Products > Transfer Switches > Asco > Series%20300%20Group%20G%20Power%20Transfer%20Switch

MODEL: Series 300 Group G Power Transfer Switch - ASCO Series 300 Group G Power Transfer Switch

CALL FOR A QUOTE: 1-800-370-3261

> Download PDF Specs Sheet for this Product
Model NumberSeriesApplicationsAmperagePolesVoltage
Series 300 Group G Power Transfer Switch300 GROUP GCommercial, Light, Industrial30 - 3,0002, 3 or 4115 - 600V


View These Series 300G Videos
300 G Intro |  300 G Normal Operation | 300 G OTTS Operation 
300 G Inphase Operation | 300 G DTTS Operation

The ASCO Series 300 was designed to automatically transfer critical loads in the event of a power outage. It is also designed to handle total system loads including motors and other high inrush and inductive loads. 
The ASCO Series 300's 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.
The ASCO Series 300 assure the user of many years of reliability through its rugged construction and proven performance.


  • The Series 300 is listed to UL 1008 standard for total system loads
    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.
  • Controller is RoHS compliant (Restriction of Hazardous Substances).
  • 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 being in contact with both sources at the same time.
  • Theres 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 navigate 128x64 graphical LCD display with keypad provides LED indicators for switch position, source availability, not in auto, and alert
  • Integrated multilingual user interface for configuration and monitoring.
  • Delayed transition operation is now available (Dual Operator Configuration).
  • Non-automatic operation can be selected using the key pad without opening enclosure door.
  • Relay expansion module with extra relays for accessory outputs (Optional).
  • Includes soft keys for test function and time delay bypass as standard features.
  • Historical event log (Optional).
  • Statistical ATS system monitoring information
  • Diagnostic Functions.
  • Password protection to prevent unauthorized tampering of settings.
  • 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.
  • Field modification accessory kits available.
  • Available for immediate delivery.

Call us toll free at 1-800-370-3621 or send us a message now. We’re here to help.

© Copyright 2017 Kentech Inc.

Houston, TX (Headquarters)
21855 E. Hammond Dr.
Porter, TX 77365 | Map
(281) 358-0980
(800) 370-3621
Send us a message
San Antonio, TX
7943 E. Evans Rd.
San Antonio, TX 78266 | Map
(210) 946-2474
(800) 370-3621
Send us a message