Emerson ASCO 4000 Brochures and Data Sheets

Healthcare Facilities

Web Hosting, Internet Data Centers

Commercial Buildings / Industrial Buildings

Telecom Central Offices

Process Manufacturing / Wafer Fabrication Plants /

Distributed Power / Load Management

As we become more dependent on the quality and reliability of electrical power, interruption or complete loss of power can create serious and even crippling financial losses, or impose dangers to life and safety.

ASCO Power Technologies (ASCO) provides the solutions to handle the transfer of critical loads to emergency sources reliably and with state of the art products. Using ASCO products can mean the difference between a minor inconvenience and a major catastrophe. You’ll find ASCO Power Transfer Switches wherever there is a critical load to be protected.

When flexibility in power switching is a must, ASCO offers a variety of product solutions to meet virtually every application requirement, including distributed generation applications. That’s why the 4000 SERIES is available in open, delayed, closed and closed soft load configurations. Additionally, switched or overlapping neutral options provide for reliable operation of ground fault protection systems and reduction of voltage transients from unbalanced load switching.

ASCO 4000 SERIES Power Transfer Switches

Critical Loads Demand ASCO

Protecting:

• Conventional two-position transfer configuration, plus closed and delayed transition modes of operation. All configurations available with either automatic or non-automatic control.

• UL listed to 1008 Transfer Switch Equipment & CSA certified to CSA 22.2 No.178-1978 Automatic Transfer Switches.

• Qualified to IEC 60947-6-1, CE marked (optional). (Limited to certain accessories.)

• Rated up to 600 VAC, 30 through 4000 amperes.

• Reliable and field proven solenoid operating mechanism.

• High withstand and close-on ratings including short time withstand current rating for optimum flexibility in circuit breaker coordination (800-4000 amperes).

• Solid, switched neutral configurations available.

ASCO Power Transfer Switches are the standard of the industry. High speed transfer of loads between alternate sources of power, regardless of ampacity size, is achieved by a reliable, field proven solenoid operating mechanism. When combined with a programmable microprocessor controller with keypad and LCD display, they offer the most advanced method of transferring all types of loads, such as motors, electronic drives, UPS’s and microprocessor based systems. 4000 S

ERIES Power

Transfer Switches are available open or enclosed, in ampacity sizes from 30 through 4000 amperes with a limited selection of optional accessories.

• Front replaceable main and arcing contacts (800-4000 amperes).

• Programmable microprocessor controller with keypad and LCD display.

• Industrial grade user interface with integrated controls and indicating lights.

• Convenient one line diagram with switch position and source acceptability LED indicators.

• Standard ground conductor connections.

• Four auxiliary contacts, two contacts closed when switch is in normal position and two contacts closed when switch is in emergency position.*

• Local/remote communications capability for interfacing with ASCO

POWERQUEST

communication products.

4000 SERIES

4000 SERIES Power Transfer Switches Product Features

Fig. 1:

Three Pole 4000 S

ERIES Automatic Transfer Switch

rated 800 amperes

Only two contacts standard on 150-400A 4ACTS and 4NCTS

The Recognized Leader in Power Transfer Switch Technology Offers the Most Advanced Transfer Switches in the World.

Delayed-Transition Transfer Switching

Fig. 3:

Four pole, Delayed-Transition

Transfer Switch rated 400 amperes

in Type 1 enclosure.

ASCO Delayed-Transition Transfer Switches are designed to provide transfer of loads between power sources with a timed load disconnect position for an adjustable time period. Applications include older style variable frequency drives, rectifier banks, and load management applications.

• Available 150 through 4000 amperes.

• Utilizes reliable, field proven solenoid operating mechanisms.

• Mechanical interlocks to prevent direct connection of both sources.

• Indicator light (LED Type) for load disconnect position.

• Adjustable time delay for load disconnect position.

Closed-Transition Transfer Switching

ASCO Automatic Closed-Transition Transfer Switches feature main contacts that overlap, permitting the transfer of electrical loads without power interruption. The switch transfers in a make-before-break mode if both sources are within acceptable parameters. Control logic continuously monitors source conditions and automatically determines whether the load transfer should be open (conventional non-overlap mode) or Closed-Transition. Available 150 through 4000 amperes.

Closed-Transition Transfer within 5 electrical degrees is achieved passively, without control of engine generator set. Therefore, no additional control wire runs are required between the ATS and engine generator set governor. Plus, protective relaying may not be required under normal operation since the contact overlap time is less than 100 milliseconds (consult your local utility on protective relay requirements).

Failure to synchronize indication, extended parallel time protection, and transfer switch lock out are standard features.

Fig. 2:

Four pole, Closed-Transition Transfer Switch

rated 1000 amperes in Type 1 enclosure.

4000 S

ERIES POWER

SWITCHING SOLUTIONS

Non-Automatic Transfer Switching

ASCO Non-Automatic Transfer Switches are electrically operated units which are operated with manual control switches mounted locally or at remote locations.

• Sizes from 30 through 4000 amperes.

• Microprocessor based controller provides for addition of optional accessories.

• Controller prevents inadvertent operation under low voltage conditions.

• Low control circuit operating currents allow for long line runs between remotely mounted manual control switches and the transfer switch.

• Source acceptability lights inform operator if sources are available to accept load.

• Standard inphase monitor can be activated for transferring motor loads.

Fig. 4:

Three pole Non-Automatic,

electrically operated 200 ampere switch

shown in Type 1 enclosure.

4000 SERIES POWER SWITCHING SOLUTIONS

Withstand and Close-On Ratings for all 4000 SERIES Products

The 4000 SERIES microprocessor controller is used with all sizes of Power Transfer Switches from 30 through 4000 amperes. It represents the most advanced digital controller in the industry and includes, as standard, all of the voltage, frequency, control, timing and diagnostic functions required for most emergency and standby power applications.

Because of severe voltage transients frequently encountered with industrial distribution systems, the microprocessor logic board is separated and isolated from the power board as shown below. This improves electrical noise immunity performance and helps assure compliance with the rigorous transient suppression standards highlighted below.

Fig. 6:

Microprocessor Power and Logic PC Boards.

Fig. 5:

4000 S

ERIES

Microprocessor Controller.

4000 SERIES Microprocessor Controller

Emission Standard - Group 1, Class A EN 55011:1991 Generic Immunity Standard, from which: EN 50082-2:1995

Electrostatic Discharge (ESD) Immunity EN 61000-4-2:1995 Radiated Electromagnetic Field Immunity ENV 50140:1993 Electrical Fast Transient (EFT) Immunity EN 61000-4-4:1995 Surge Transient Immunity EN 61000-4-5:1995 Conducted Radio-Frequency Field Immunity EN 61000-4-6:1996 Voltage Dips, Interruptions and Variations Immunity EN 61000-4-11:1994

4000 SERIES MICROPROCESSOR CONTROLLER

Voltage and Frequency Sensing

• 3-Phase under and over voltage settings on normal and emergency sources.

• Under and over frequency settings on normal and emergency.

• True RMS Voltage Sensing with +/- 1% accuracy; Frequency Sensing Accuracy is +/- 0.2%.

• Selectable settings: single or three phase voltage sensing on normal and emergency; 50 or 60Hz.

• Phase sequence sensing for phase sensitive loads.

• Voltage unbalance detection between phases.

Status and Control Features

• Output contact (N/O or N/C) for engine-start signals.

• Selection between “commit/no-commit” on transfer to emergency after engine start and normal restores before transfer.

• Terminals for remote test or customer contact for peak shaving applications

• Advanced inphase algorithm which automatically measures the frequency difference between the two sources and initiates transfer at appropriate phase angles to minimize disturbances when transferring motor loads.

• Output signals for remote indication of normal and emergency source acceptability.

• Statistical ATS/System monitoring data screens which provide:

• Total number of ATS transfers.

• Number of ATS transfers caused by power source failure.

• Total number of days ATS has been in operation.

• Total number of hours that the normal and emergency sources have been available.

Time Delays

• Engine start time delay - delays engine starting signal to override momentary normal source outages - adjustable 0 to 6 seconds.

• Transfer to emergency time delay - adjustable 0 to 60 minutes.

• Emergency source stabilization time delay to ignore momentary transients during initial generator set loading - adjustable 0 to 6 seconds.

• Retransfer to normal time delay with two settings:

• Power failure mode - 0 to 60 minutes.

• Test mode - 0 to 10 hours.

• Unloaded running time delay for engine cooldown adjustable 0 to 60 minutes.

• Fully programmable engine exerciser with seven independent routines to exercise the engine generator, with or without loads, on a daily, weekly, bi-weekly or monthly basis.

• Contains all alarm signals, logic and time delays for use with closed transition switches.

• Insynch time delay - 0 to 3 seconds.

• Failure to synchronize - 1 to 5 minutes.

• Extended parallel time - 0.1 to 1.0 seconds.

• Transfer switch locked out.

• Delayed transition load disconnect time delay adjustable 0 to 5 minutes. (Delayed Transition Switches only.)

4000 SERIES

MICROPROCESSOR CONTROLLER

Features

• Digital microprocessor.

•

Touch pad programming of features and settings without the need for meters, or variable power supplies.

• Sixteen (16) selectable operating voltages available in a single controller.

• On-board diagnostics provide control panel and ATS status information to analyze system performance.

• Displays and counts down active timing functions.

• Selectable multi-language display (English, German, Portuguese, Spanish, or French. For others contact ASCO).

• Password protection to prevent unauthorized tampering of settings.

• Remote monitoring and control with ASCO POWERQUEST

communications.

products. Specify optional accessory 72A or 72E.

• Load shed option for bus optimization applications. Specify optional accessory 30B.

• Lamp Test - Provides a convenient way to verify

functionality of all LED’s on the user interface.

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