Service Entrance Transfer Switch, ATS | ASCO 300 Group G | Emerson

​ASCO Series 300 Group G Service Entrance

Emerson Network Power > CHINA > Products > By Type > Power Switching and Controls > Power Transfer Switches > ASCO Series 300 Group G Service Entrance Power Transfer Switch
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.​

Suitable for use as service entrance equipment. Listed to UL 891 (standard for switchboards) for 600 - 3000 amps, sizes and UL 1008 (standard for panel-boards) for 70 - 400 amps.

  •  Automatic Transfer Switch is listed to UL 1008 for total system loads.
  • Sizes available from 70 - 3000 amps, 600 VAC, 50 or 60 Hz, single or three phase.
  • Silver plated copper ground and neutral bus with solderless screw type terminals.
  • Ground fault trip protection provided on sizes 1000 amps and above.
  • Available with solid or switched neutral

 Products 400 amperes or less, utilize a single enclosure including a service (utility source) disconnect circuit breaker, as well as the power transfer switch, grounding and bonding provisions.

Products 600 amperes and above, utilize a multi-section switchboard construction including a service equipment section containing the service (utility source) disconnect circuit breaker, grounding, and bonding provisions. A second section contains the power transfer switch.


    Field Conversion Kits for Series 300 Transfer Switches

    Kit No. Description
    935147 Feature Bundle Includes Engine Exerciser/Event Log/RS 485/Common Alarm Output Contact (Acc. 11BE) Dongle
    935148 REX Module with Source Availability Contacts (Acc. 18RX)
    935149 UPS to allow controller to run for 3 minutes minimum without AC Power
    935150  1 / 3 Phase load current sensing card only (Acc. 23GA/GB)
    K613127-001 Strip Heater (125 watt) 120 volt (Acc.44A)
    K613127-002 Strip Heater (125 watt) 208 - 480 volt (Acc.44G)
    948551 Quad - Ethernet Module (Acc. 72EE)
    K60927 Cable Pull Box (1600 - 2000 amp)


    Misson-Critical Care
    Our comprehensive service portfolio extends beyond routine maintenance to include solution upgrades and technology training that ensure you get the most from your emergency power systems.

    1 800 800 ASCO (2726)