Series 300
We Keep Your Power On fi
Power Transfer Switches
Power Outage Protection
Where would you be without a constant flow of electrical power? We often take for granted that power will always be around when we need it. In reality, power failures are very common. And when the power goes out, your business suffers. Power failures are unpredictable. They can occur at any time and for any number of reasons— a bolt of lightning, a power surge, a blackout, an accident or even equipment failure. They come without warning and often at the most inconvenient times.
It s for this reason that many businesses and other entities have invested in emergency power backup systems. Typically, the system consists of an engine generator and an automatic transfer switch (ATS) which transfers the load from the utility to the generator.
An ATS with built-in control logic monitors your normal power supply and senses any interruptions. When the utility power fails, the ATS automatically starts the engine and transfers the load after the generator has reached proper voltage and frequency. This happens in a matter of seconds after the power failure occurs. When the utility power has been restored, the ATS will automatically switch the load back, and after a time delay, it will shut down the engine. With an Automatic Transfer Switch, you are protected 24 hours a day, seven days a week.
Series 300 Power Transfer Switches Typical Applications
Telecom
In the telecommunications industry, providing a high level of service and dependability is crucial. Lost power means an interruption in service for your customers and lost business for your company. For instance, with cell sites scattered across a wide geographical region and in many remote areas, the chances of an interruption in power are increased, making Automatic Transfer Switches a valuable resource at each location. To maintain dependable service, each cell site must be monitored 24 hours a day. This can be very difficult without some type of remote monitoring and testing capability. The Series 300 Transfer Switch, combined with ASCO s monitoring and control management system, is a cost-effective, packaged solution which can help meet both of these challenging objectives without a major investment at each cell site. With ASCO s connectivity solutions you can remotely monitor and control numerous sites from around the corner or around the world.
Commercial/Retail, Light Industrial
The retail industry is very competitive. An electrical power failure can have a dramatic impact on a retailer s bottom line. If power is interrupted during peak shopping times, the effect could be extremely damaging to present and future business. A power interruption will not only suspend shopping, it can also create safety problems, result in lost transaction data, lost account information and damage to data collection equipment. In addition, retailers who rely on controlled climates to protect valuable inventory could suffer even greater losses, especially if the power failure occurs at a time when no one is available to rectify the situation. To avoid any of these power
outage problems, simply install a backup generator with an ASCO Series 300 Transfer Switch and power outage concerns will be a thing of the past.
Municipal
The ASCO Series 300 Transfer Switch can be a critical component of a municipal government s emergency power backup system. Residents of townships, cities and counties rely on police, fire, ambulance/first aid and other critical public sector services. An interruption in power would affect the ability of emergency services to effectively respond to the needs of the community. When time is a critical factor, such as when responding to a fire alarm or an emergency call, an ASCO Series 300 Transfer Switch can be a lifesaver, switching power to the backup generator. While not all municipal services are a matter of life and death, they are always expected to be there.
Agriculture
Maintaining electrical power is vital to an agriculture operation. If the flow of power is interrupted, your operation could be at risk unless the backup generator is quickly activated. A prolonged power outage can affect numerous aspects of the operation, from housing and feeding livestock to processing and producing the end product. With an ASCO Series 300 Transfer Switch, power will automatically be transferred over to your backup generator, eliminating the need to manually switch from utility to generator. When power is restored, the ASCO Series 300 Transfer Switch will, after an adjustable time delay to allow for utility stabilization, automatically switch the load back to the utility service.
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Series 300 Power Transfer Switches
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
lThe Series 300 is listed to UL 1008 standard for Transfer Switch Equipment and CSA standard C22.2 for automatic transfer switches.
lMeets NFPA 110 for Emergency and Standby Power Systems and the National Electrical Code (NEC) Articles 700, 701 and 702.
l 30 through 3000 amps in a compact design. l Available to 600 VAC, single or three phase.
lTrue double-throw operation: The single solenoid design is inherently interlocked and prevents contacts from stopping between sources or from being in contact with both sources at the same time.
UL Listed Withstand & Close-On Ratings
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Available Symmetrical Amperes RMS |
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Switch Ratings |
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When Used |
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When Used |
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amps |
Maximum |
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With Specific |
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With Current |
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Voltage |
Circuit Breakers |
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Limiting Fuses |
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@ 480V/60Hz |
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30 - 200 |
200,000 |
480v/60Hz |
22,000 |
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230 |
100,000 |
480v/60Hz |
22,000 |
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260, 400 |
200,000 |
480v/60Hz |
42,000 |
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600,800,1000,1200 |
200,000 |
600v/60Hz |
65,000 |
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1600, 2000 |
200,000 |
600v/60Hz |
85,000 |
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2600, 3000 |
200,000 |
600v/60Hz |
100,000 |
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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 manufacture’s breakers
Fig. 1: ASCO Power Transfer Switch rated 200 amperes shown in Type 3R enclosure
lThere 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.
lEasy-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.
lStandard engine exerciser for weekly automatic testing of engine generator set with or without load.
lAdjustable time-delay feature prevents switch from being activated due to momentary utility power outages and generator dips.
lSupplied with solid neutral termination. Optional switched neutral pole available.
l Accessory kits available.
l Available for immediate delivery.
lNow available for service entrance applications. Contact ASCO for assistance.
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Designed to Fit Anywhere
The ASCO Series 300 product line represents the most compact design of automatic power transfer switches in the industry. With space in electrical closets being at a premium, the use of wall or floor-mounted ASCO Power Transfer Switches assures designers optimum utilization of space.
All transfer switches through 2000 amps are designed to be completely front accessible. This permits the enclosures to be installed flush to the wall and still allows installation of all power cabling and connections from the front of the switch. Cable entrance plates are also standard on the 1600 and 2000 amp units to install optional side-mounted pull boxes for additional cable bending space.
Fig. 2: ASCO Power Transfer Switch
rated 200 amperes
Fig. 4: ASCO Power Transfer Switch
rated 1000 amperes
Fig. 5: ASCO Power Transfer Switch rated 2000 amperes shown in Type 3R enclosure
Fig. 3: ASCO Power Transfer Switch
rated 400 amperes
Fig. 6: ASCO Power Transfer Switch
rated 3000 amperes
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Series 300 Microprocessor Controller
The ASCO Microprocessor Controller is used with all sizes of Power Transfer Switches. It represents the most reliable microprocessor controller in the industry and includes, as standard, all of the voltage, frequency, control, timing and connectivity functions required for most emergency and standby power applications.
Fig. 7: ASCO Series 300
Microprocessor Controller
Voltage & Frequency Sensing
lAdjustable three-phase, close-differential voltage sensing on normal source.
lNormal source pickup voltage is adjustable to 95% of nominal; drop-out is adjustable from 70% to 90% of nominal.
lFrequency sensing on emergency source. Pickup at 95% and dropout at 85% of nominal.
Time Delays
lAdjustable time delay to override momentary normal source outages to delay all transfer switch and enginestarting signals.
lTransfer to emergency time delay—Adjustable from 0 to 5 minutes for controlled timing of load transfer to emergency.
l Retransfer to normal time delay—Adjustable to 30 minutes.
lFive-minute unloaded running time delay for emergency engine generator cool down.
lFour-second time delay to ignore momentary voltage and frequency transients during initial genset loading.
Fig. 8: Door-Mounted Control & Display Panel
Control and Display Panel
lEasy-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.
Standard Selectable Features
lInphase monitor to transfer motor loads, without any intentional off time, to prevent inrush currents from exceeding normal starting levels.
l Engine exerciser to automatically test backup generator each week Includes control switch for testing with or without load.
lSelective load disconnect, double-throw contact to operate at an adjustable 0 to 20 second adjustable time delay prior to transfer and reset 0 to 20 seconds after transfer.
l 60 Hz or 50 Hz selectable switch.
l Three-phase/single-phase selectable switch.
Remote Control Features
Terminal provisions for connecting: l Remote test switch.
lRemote contact for test or for peak shaving applications. Circuit will be automatically bypassed if emergency source fails.
l Inhibit transfer to emergency.
l Remote time-delay bypass switch.
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