ASCO Logo Series 300

Series 300, Industrial Automatic & Manual Transfer Switches, Industrial Automatic & Manual Transfer Switches, Enclosed, Open with Open, Closed and Delayed Transitions
ASTR-300 (327)
30 to 3,000 Amp, Indoor, Outdoor, Explosion Proof, Stainless and Accessories, 100, 200, 230 & 400 Amp, Indoor & Outdoor, Light Duty,    >>>>Order online or call PowerPixie @ 707 542-2224 to take your order. GSA Pricing Available.
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  • Detailed Description

    ASCO Series 300 Transfer Switch Group - Automatic Transfer Switches - Enclosed & Open

    As the world leader in emergency and standby power transfer solutions, ASCO keeps your power on. ASCO Automatic Transfer Switches and Power Systems safeguard data and telecommunications networks, industrial processes and critical installations from health care facilities to financial transaction centers.

    Over the past 70 years, ASCO has pioneered every major product innovation in power transfer technology. ASCO is committed to providing a full range of quality-driven products, backed by 24-hour nationwide service support.

    ASCO Series 300 Enclosed- ASCO Series 300 automatic transfer switches are suitable for emergency and standby power system applications.

    ASCO Series 300 Open - ASCO Series 300 automatic transfer switches are suitable for emergency and standby power system applications. These units are identical to Series 300 enclosed but do not have front covers or doors. This Series is designed to be installed inside rack systems or other enclosures and will not meet electrical or UL codes if installed standing alone.

    Sizes 30 through 3000 amps in a compact design with 2, 3, & 4 pole configurations. Available 120 to 600 VAC. UL 1008 listed to 480 VAC for total system loads. True double-throw, inherently interlocked construction to absolutely prohibit connecting both sources together.Mechanically held, electrically operated utilizing a reliable, field-proven single solenoid operator. Contacts easily accessible for easy inspection and preventive maintenance. Meets National Electric Code requirements (U.S.). Rated for emergency and standby applications.

    • Standard models in stock, dropped shipped to your location. FREE SHIPPING with purchase of a generator at the same time.
    • Available in Type 1 and 3R enclosures 30 through 3000 amps. Type 1, 3R, 4 and 12 from 30 to 1600 amps, (some exceptions).
    • Available In "Non-Automatic or Manual " versions. See ASCO Transfer Switch Group - Automatic Transfer Switches - Enclosed - Series 386
    • Covers are hinged, heavy duty type with secured latching mechanism.
    • Conversion kits available from stock to allow field addition of Optional Accessories.
    • Qualified and listed to CSA C22.2 No. 178 and UL 1008 automatic transfer equipment standards.
    • For technical data, weights, dimensions, features, remote controls, monitoring, warranty and other information, See Additional Information below.
    ASCO Automatic Transfer Switch, "Standard" Features - Enclosed - Series 300
    Manual bypass of transfer to normal TD with Test switch Auto engine exerciser with load/no load switch
    Switch position lights, source availability lights, test switch and time delay bypass switch. ATS position indicating contacts, Normal, Emergency
    Motor load transfer controls (in-phase monitor) to keep motors operating during transfer. Provisions for remote transfer contact (peak shave/test), with automatic bypass (retransfer) if emergency fails, and normal is acceptable.
    Load disconnect contacts, with TD which operate before/after transfer Standard Engine Exerciser for weekly automatic testing of engine generator set with or without load.
    Pre-transfer & post-transfer load disconnect contacts for signaling motor starters, elevators, VFDs and other selected loads. Selectable control switches for voltage, frequency, time delay settings & additional control features.
    Voltage & Frequency Sensing Standard Control Contacts
    Adjustable three-phase, close differential voltage sensing on normal source. Switch position indicating contacts (rated 10 amps 250VAC, 32VDC). (1) for Normal position, (1) for Emergency position
    Normal source pickup voltage is adjustable to 95% of nominal; drop-out is adjustable from 70 to 90% of nominal.

    Gold plated engine start contacts (rated 5 amps 28VDC or 120VAC).

    Time Delays Remote Control Features
    Adjustable time delay to over ride momentary normal source outages to delay all transfer switch and engine-starting signals. Remote test switch.
    Transfer to emergency time delay. Adjustable from 0 to 5 minutes for controlled timing of load transfer to emergency. Remote time delay bypass switch.
    Retransfer to normal time delay. Adjustable to 30 minutes. Inhibit transfer to emergency.
    Five-minute unloaded running time delay for generator cool down. Extensive remote control capabilities.

    Four-second time delay to override momentary to ignore momentary voltage and frequency transients during initial GenSet loading.

    Remote contact for test or for peak shaving applications. Circuit will be automatically bypassed if emergency source fails.
    .

    ASCO Accessories For Series 300 Transfer Switches

    Number Accessory Name- Click For Details> Optional Accessories
    300-5308 A programmable engine exerciser that provides for weekly or biweekly operation, includes one form C contact for source availability of normal and emergency (contact rating 2 amps @ 30Vdc, 0.5 amp. @ 125 VAC resistive). The programmable engine exerciser incorporates a 7 day or 14 day time base with a digital readout display. Includes "with or without" load control switch for exerciser period.
    K601111
    (field install)
    Deluxe Engine Exerciser Kit (includes Acc 300-5308). Field installable kit.
    14AA/A4BA ATS position indicating contacts, (2) for Normal, (2) for Emergency
    601815 Local Site Converter (RS232 to RS485)
    72A Communications Interface Module
    601110 Communications Interface Module Kit (with Acc. 72A)
    5120 Telephone Interface Module
    VPI 32.15 PowerQuest VPi Software
    62W Transfer to emergency alarm horn & silence switch (City of Chicago)*
    44A Strip heater w/ thermostat, external 120 volt power source required. Strip Heater with thermostat for extremely cold areas to prevent condensation and freezing of this condensation. External 120 volt power source required.
    44G Strip heater w/ thermostat, wired to load terminals: 208-240, 360-380, 460-480, 550-600 volts. Contains wiring harnesses for all transfer switch sizes.
    K613127-001 Strip Heater Kit, (125 watt) 120 volt (Acc. 44A)
    K613127-002 Strip Heater. Kit (125 watt) 208- 600 volt (Acc. 44G)
    K609027 Cable Pull Box (1600-2000 amp)

  • The packages shown below are the most common combinations of options. Each package includes only the options listed. Also see Included Equipment above.
    If you want a Package deal but need additional options, select the options in the drop down windows above, then check the box "Option Only", Click the Product BUY button and then Click the "Package" BUY button next.
    You can also select all the options you want and just click the product BUY button and select your custom configuration.
    Automatic, 300 Series, 104 Amp, 2 Pole, Indoor, Nema 1   Our Price: $1,284.10 Qty:
    Automatic, 300 Series, 104 Amp, 2 Pole, Outdoor, Nema 3R   Our Price: $1,466.26 Qty:
    Automatic, 300 Series, 150 Amp, 2 Pole, Indoor, Nema 1   Our Price: $1,414.01 Qty:
    Automatic, 300 Series, 150 Amp, 2 Pole, Outdoor, Nema 3R   Our Price: $1,596.17 Qty:
    Automatic, 300 Series, 200 Amp, 2 Pole, Indoor, Nema 1   Our Price: $1,643.24 Qty:
    Automatic, 300 Series, 200 Amp, 2 Pole, Outdoor, Nema 3R   Our Price: $1,825.40 Qty:
    Automatic, 300 Series, 200 Amp, 3 Pole, Indoor, Nema 1   Our Price: $1,796.23 Qty:
    Automatic, 300 Series, 200 Amp, 3 Pole, Outdoor, Nema 3R   Our Price: $1,978.39 Qty:
    Automatic, 300 Series, 400 Amp, 2 Pole, Indoor, Nema 1   Our Price: $2,292.81 Qty:
    Automatic, 300 Series, 400 Amp, 2 Pole, Outdoor, Nema 3R   Our Price: $2,474.97 Qty:
    Automatic, 300 Series, 400 Amp, 3 Pole, Indoor, Nema 1   Our Price: $2,675.03 Qty:
    Automatic, 300 Series, 400 Amp, 3 Pole, Outdoor, Nema 3R   Our Price: $2,857.19 Qty:
  •  
    Purchase option only
    Transfer Switch Voltages @ 60 Hertz Details
    Transfer Switch Voltages @ 50 Hertz Details
    Switch Selector - AUTOMATIC or MANUAL Details
    Extended Warranties Details
    ASCO Auto Transfer Switch, Enclosed, 300 Series 3ATS / 3NTS Details
    ASCO 300 Series Enclosure Details
    ASCO Auto & Manual Transfer Sw, Svc Entrance, 300, 3AUS / 3NUS Details
    ASCO Auto & Manual, 300 Series, Service Entrance Enclosure Details
    ASCO 300 Series Service Entrance Enclosure Details
    ASCO Auto & Manual Trans Sw, Delayed Trans, Enclosed, 3ADTS / 3NDTS Details
    ASCO 300 Series, Delayed Transition Enclosure Details
    ASCO Auto & Manual Switch, Open, 300 Series, 3ATS-O / 3NTS-O Details
    ASCO Auto & Manual Trans Sw, Delayed Trans. Open, 3ADTS-O / 3NDTS-O Details
    ASCO Auto Transfer Switch, Load Center, 300 PTLC Series Details
    ASCO Transfer Switch Exerciser or Clock Details
    Heaters Details
    Auxiliary Contacts Details
    Wiring Components Details
    Communications Options Details
    Surge Suppressors Details
    Special Options Details
  • Standard Features
    Series 300, Industrial Automatic & Manual Transfer Switches, Industrial Automatic & Manual Transfer Switches, Enclosed, Open with Open, Closed and Delayed Transitions
    Close differential 3 phase under-voltage sensing of Source1 (normal) - factory standard setting 90% pickup, 80% dropout (adjustable); under-frequency sensing of Source 1 factory setting 95% pickup (adjustable).
    Contact transfer speed less than 100 milliseconds
    eTemperature rise test per UL 1008 conducted after overload and endurance tests in unventilated enclosure-exceeds UL requirements
    High close-in and withstand capability
    NEMA Type 1 enclosure is standard. Also available in NEMA 3R, 4, 4X & 12.
    Voltage and frequency sensing of the Source 2 (emergency) - factory standard setting 90% pickup voltage, 95% pickup frequency (adjustable).
    Indicating LEDs for source availability and switch position.
    Pushbuttons for test, exerciser set, timer bypass and program cancel.
    Special status annunciation of in-phase transfer and timer operation.
    Selectable 7, 14, 21 or 28 day (factory set 28 dsays) generator (source2) with or without load exerciser timer.
    Diagnostic LED indications in logical one-line configuration.
    Auxiliary contacts (1 each) cclosed in Source 1 (normal) and Source 2 (emergency positions.
    Close differential under-voltage sensing of the normal source.
    Voltage and frequency sensing of the emergency source.
    Test switch (fast test/load/no load) to simulate normal source failure - automatically bypassed should the emergency source fail .
    Double throw, interlocked operation .
    Electrically operated, mechanically held by a simple, over-center mechanism.
    Segmented silver tungsten alloy contacts with separate arcing contacts on 600 amps and above.
    Arc quenching grids, enclosed arc chambers and wide contact air gap for superior source-to-source isolation on all units.
    Control circuit disconnect plug and drive inhibit switch for safe maintenance.
    Components accessible for inspection and maintenance without removal of the switch or the power conductors.
    Mechanical indicator and contact chamber cover designed for inspection, safety and position designation.
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General Notes: Proudly made in the USA by Americans!