Description
ASCO 300SE Series Automatic Transfer Switch
Service Entrance Rated
The ASCO Service Entrance Power Transfer Switch combines automatic power switching with the necessary disconnecting, grounding, and bonding required for use as service entrance equipment. The power transfer switch meets all National Electrical Code requirements for service entrance use. Transfer switches generally are installed at facilities that have a single utility feed and a single emergency power source.
ASCO Series 300SE products use two types of construction.
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.
Product Features:
- 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.
- 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.
- Meets NFPA 110 for Emergency and Standby Power Systems and the National Electrical Code (NEC) Articles 700, 701 and 702.
- 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 solderless screw type terminals
- Ground fault trip protection provided on sizes 1000 amps and above
- 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.
- There’s no danger of the SeriesSE 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.
Standard Selectable Features
- In-phase monitor to transfer motor loads, without any intentional off time to prevent motor inrush currents from exceeding normal starting levels.
- Engine exerciser to automatically test backup generator each week. Includes control switch for testing with or without load.
- Selective load disconnect, double-throw contact to operate at an adjustable 0 to 20 second time delay prior to transfer and reset 0 to 20 seconds after
- 60 Hz or 50 Hz selector switch.
- Three-phase/single-phase selector switch.
Voltage & Frequency Sensing
- Adjustable three-phase, close differential voltage sensing on normal source.
- Normal source pickup voltage is adjustable to 95% of nominal; drop-out is adjustable from 70 to 90% of nominal.
- Frequency sensing on emergency source. Pickup at 95% and dropout at 85% of nominal.
Time Delays:
- Adjustable time delay to override momentary normal source outages to delay all transfer switch and engine-starting signals.
- Transfer to emergency time delay. Adjustable from 0 to 5 minutes for controlled timing of load transfer to emergency.
- Re-transfer to normal time delay. Adjustable to 30 minutes.
- Five-minute unloaded running time delay for emergency engine generator cool down.
- Four-second time delay to override momentary to ignore momentary voltage and frequency transients during initial gen-set loading.
Type 1 Indoor Enclosure:
- Listed to UL 50 standard for electrical equipment enclosures.
- Fabricated from 14 gauge steel.
- Finish - textured RAL 7035 light gray polyester powder coating
- Doors secured with captive fasteners.
- Conduit knockouts on bottom, and both sides.
Type 3R Outdoor Secure Enclosure:
- Door over door secure construction.
- Listed to UL 50 standard for electrical equipment enclosures.
- Fabricated from heavy gauge aluminum alloy suited to the size and ampere rating of the switch.
- Highly corrosion resistant
- Finish - textured RAL 7035 light gray polyester powder coating.
- Doors secured with captive fasteners.
- Gasketed enclosure minimizes ingress of water and dust.
- Internal dead front panel for user safety when accessing controls.
- Conduit knockouts on bottom, and both sides.
Poles:
- 70 -1,000 Amp 1-PH - 2 Pole
- 70 -1,000 Amp 3-PH - 3 Pole
- 70 -1,000 Amp 3-PH - 4 Pole
Actual Dimensions (Inches) (W x H x D):
- 70 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 100 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 150 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 200 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 225 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 250 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 400 Amp in NEMA 1 Enclosure - 36.5 x 48.5 x 13.25
- 600 Amp in NEMA 1 Enclosure - 38 x 91 x 28
- 800 Amp in NEMA 1 Enclosure - 38 x 91 x 28
- 1000 Amp in NEMA 1 Enclosure - 38 x 91 x 48
- 70 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 100 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 150 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 200 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 225 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 250 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 400 Amp in NEMA 3R Enclosure - 36 x 48 x 16
- 600 Amp in NEMA 3R Enclosure - 41 x 95.5 x 34
- 800 Amp in NEMA 3R Enclosure - 41 x 95.5 x 34
- 1000 Amp in NEMA 3R Enclosure - 41 x 95.5 x 62
Shipping Dimensions (Inches) (W x H x D):
- 70 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 100 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 150 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 200 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 225 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 250 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 400 Amp in NEMA 1 Enclosure - 43 x 55 x 20
- 600 Amp in NEMA 1 Enclosure - 45 x 98 x 35
- 800 Amp in NEMA 1 Enclosure - 45 x 98 x 35
- 1000 Amp in NEMA 1 Enclosure - 45 x 98 x 55
- 70 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 100 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 150 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 200 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 225 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 250 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 400 Amp in NEMA 3R Enclosure - 43 x 55 x 23
- 600 Amp in NEMA 3R Enclosure - 45 x 98 x 35
- 800 Amp in NEMA 3R Enclosure - 45 x 103 x 40
- 1000 Amp in NEMA 3R Enclosure - 45 x 103 x 69
Shipping Weight (Pounds):
- 70 Amp in NEMA 1 Enclosure - 408 Lbs
- 100 Amp in NEMA 1 Enclosure - 408 Lbs
- 150 Amp in NEMA 1 Enclosure - 408 Lbs
- 200 Amp in NEMA 1 Enclosure - 408 Lbs
- 225 Amp in NEMA 1 Enclosure - 416 Lbs
- 250 Amp in NEMA 1 Enclosure - 416 Lbs
- 400 Amp in NEMA 1 Enclosure - 408 Lbs
- 600 Amp in NEMA 1 Enclosure - 870 Lbs
- 800 Amp in NEMA 1 Enclosure - 1470 Lbs
- 1000 Amp in NEMA 1 Enclosure - 1470 Lbs
- 70 Amp in NEMA 3R Enclosure - 520 Lbs
- 100 Amp in NEMA 3R Enclosure - 520 Lbs
- 150 Amp in NEMA 3R Enclosure - 520 Lbs
- 200 Amp in NEMA 3R Enclosure - 520 Lbs
- 225 Amp in NEMA 3R Enclosure - 485 Lbs
- 250 Amp in NEMA 3R Enclosure - 554 Lbs
- 400 Amp in NEMA 3R Enclosure - 520 Lbs
- 600 Amp in NEMA 3R Enclosure - 1180 Lbs
- 800 Amp in NEMA 3R Enclosure - 1540 Lbs
- 1000 Amp in NEMA 3R Enclosure - 1540 Lbs
Optional Accessories
Accessory 11BG - 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.
Accessory 44A - Strip Heater with thermostat for extremely cold areas to prevent condensation and freezing of this condensation. External 120 volt power source required.
Accessory 44G - Strip Heater with thermostat, wired to load terminals: 208-240, 360-380, 460-480, 550-600 volts. Contains wiring harnesses for all transfer switch sizes.
