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W7 Adjustable Speed Drive Installation
and Operation Manual
Document Number: 57442-000
Date: June, 2005
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Introduction Congratulations on the purchase of the new W7 Adjustable Speed Drive (ASD). The W7 ASD is an 18-pulse PWM drive designed for use with 3-phase AC induction motors. This 18 pulse design includes an 18 pulse input diode bridge rectifier combined with and an integral phase shifting transformer. U.S. Patent 6396723. Japan Patent pending 2000-179543. The drive has been designed for applications that require low total harmonic distortion (THD) at the drive input terminals (6% typical) a
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About This Manual This manual was written by the Toshiba Technical Publications Group. This group is tasked with providing technical documentation for the W7 Adjustable Speed Drive. Every effort has been made to provide accurate and concise information to you, our customer. At Toshiba we’re continuously searching for better ways to meet the constantly changing needs of our customers. Email your comments, questions, or concerns about this publication to the Technical-Publications-Dept@TIC.TO
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Contacting Toshiba’s Customer Support Center Toshiba’s Customer Support Center can be contacted to obtain help in resolving any Adjustable Speed Drive system problem that you may experience or to provide application information. The center is open from 8 a.m. to 5 p.m. (CST), Monday through Friday. The Support Center’s toll free number is US (800) 231-1412/Fax (713) 466-8773 — Canada (800) 527-1204. You may also contact Toshiba by writing to: Toshiba International Corporation 13131 West Littl
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Table of Contents General Safety Information .................................................................................................... 1 Safety Alert Symbol .................................................................................................... 1 Signal Words ............................................................................................................... 1 Special Symbols ......................................................................................
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W7 ASD Control .............................................................................................................. 21 CNU1/1A and CNU2/2A Pinout ............................................................................... 22 CN3 Pinout ................................................................................................................ 22 CN7 Pinout ................................................................................................................ 22 I/O Cir
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General Safety Information DO NOT attempt to install, operate, maintain or dispose of this equipment until you have read and understood all of the product safety information and directions that are contained in this manual. Safety Alert Symbol The Safety Alert Symbol indicates that a potential personal injury hazard exists. The symbol is comprised of an equilateral triangle enclosing an exclamation mark. Signal Words Listed below are the signal words that are used throughout this manual follow
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Special Symbols To identify special hazards, other symbols may appear in conjunction with the DANGER, WARNING and CAUTION signal words. These symbols indicate areas that require special and/or strict adherence to the procedures to prevent serious injury to personnel or death. Electrical Hazard Symbol A symbol which indicates a hazard of injury from electrical shock or burn. It is comprised of an equilateral triangle enclosing a lightning bolt. Explosion Hazard Symbol A symbol which indicates
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Qualified Personnel Installation, operation, and maintenance shall be performed by Qualified Personnel Only. A Qualified Person is one that has the skills and knowledge relating to the construction, installation, operation, and maintenance of the electrical equipment and has received safety training on the hazards involved (Refer to the latest edition of NFPA 70E for additional safety requirements). Qualified Personnel shall: Have carefully read the entire operation manual. Be familiar wi
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The storage temperature range of the W7 ASD is 14 to 104° F (-10 to 40° C). Do not store the unit in places that are exposed to outside weather conditions (i.e., wind, rain, snow, etc.). Store in an upright position. Disposal Never dispose of electrical components via incineration. Contact your state environmental agency for details on disposal of electrical components and packaging in your area. 4 W7 ASD Installation and Operation Manual
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Installation Precautions Location and Ambient Requirements The Toshiba ASD is intended for permanent installations only. Installation should conform to the 2005 National Electrical Code — Article 110 (Requirements For Electrical Installations), all regulations of the Occupational Safety and Health Administration, and any other applicable national, regional, or industry codes and standards. Select a mounting location that is easily accessible, has adequate personnel working space, and ad
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Conductor Requirements and Grounding WARNING Use separate metal conduits for routing the input power, output power, and control circuits and each shall have its own ground cable. A separate ground cable should be run inside the conduit with the input power, output power, and and control circuits. DO NOT connect control terminal strip return marked CC to earth ground. Always ground the unit to prevent electrical shock and to help reduce electrical noise. It is the responsibility of th
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Protection Ensure that primary protection exists for the input wiring to the equipment. This protection must be able to interrupt the available fault current from the power line. The equipment may or may not be equipped with an input disconnect (option). All cable entry openings must be sealed to reduce the risk of entry by vermin and to allow for maximum cooling efficiency. Follow all warnings and precautions and do not exceed equipment ratings. If using multiple motors provide separ
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System Integration Precautions The following precautions are provided as general guidelines for the setup of the ASD within the system. The Toshiba ASD is a general-purpose product. It is a system component only and the system design should take this into consideration. Please contact your Toshiba sales representative for application-specific information or for training support. The Toshiba ASD is part of a larger system and the safe operation of the ASD will depend on observing certain
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System Setup Requirements When using the ASD as an integral part of a larger system, it is the responsibility of the ASD installer or maintenance personnel to ensure that there is a fail-safe in place, i.e., an arrangement designed to switch the system to a safe condition if there is a fault or failure. System safety features should be employed and designed into the integrated system in a manner such that system operation, even in the event of system failure, will not cause harm or result
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Operational and Maintenance Precautions WARNING Turn off, lockout, and tagout the main power, the control power, and instrumentation connections before inspecting or servicing the drive, or opening the door of the enclosure. Turn off, lockout, and tagout the main power, the control power, and instrumentation connections before proceeding to disconnect or connect the power wiring to the equipment. The capacitors of the ASD maintain a residual charge for a period of time after turning the
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Motor Characteristics Listed below are some variable speed AC motor control concepts with which the user of the W7 Adjustable Speed Drive should become familiar. Pulse Width Modulation Operation The W7 ASD uses a sinusoidal Pulse Width Modulation (PWM) control system. The output current waveform generated by the ASD approaches that of a perfect sine wave; however, the output waveform is slightly distorted. For this reason, the motor may produce more heat, noise, and vibration when operated b
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resistor. The braking resistor must be suitably matched to the load. Dynamic braking is also effective in reducing the DC bus voltage during a momentary over-voltage condition. CAUTION If under extreme conditions the dynamic braking system or a component of this system were to fail, the dynamic braking resistor may experience an extended over-current condition. The DBR circuit was designed to dissipate excessive amounts of heat and if the extended over-current condition were allowed to excee
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Installation and Connections The W7 Adjustable Speed Drive may be set up initially by performing a few simple configuration settings. To operate properly, the ASD must be securely mounted and connected to a power source (3- phase AC input at the L1/R, L2/S, and L3/T terminals). The control terminals of the ASD may be used by connecting the terminals of the Control Terminal Strip to the proper sensors or signal input sources (see the section titled I/O and Control on pg. 17). The output termin
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The ASD is designed to operate NEMA B motors. Consult with your sales representative before using the ASD for special applications such as with an explosion-proof motor or applications with a piston load. Do Not apply commercial power to the output terminals T1/U, T2/V, or T3/W. Disconnect the ASD from the motor before megging or applying a bypass voltage to the motor. Interface problems may occur when an ASD is used in conjunction with some types of process controllers. Signal isolation may
