NCR 7455 manual Appendix a Transient Protection, AC Power Line Transient Protection

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Appendix A: Transient Protection

AC Power Line Transient Protection

In the process of power distribution, transient electrical energy (including, but not limited to, lightning strikes, intermittent short circuits, and switching transients) can be introduced onto power lines. Such transient energy can be very damaging to electronic hardware, and can also cause data corruption. Under these circumstances, NCR recommends the use of AC power transient suppressors. Such protection devices are intended to guard against power line transients that can result in hardware damage and various system or program errors.

Improvement of any deficiencies in power quality is a customer responsibility. Malfunction and/or component failure as a result of power quality problems is not covered by the NCR Maintenance Agreement. NCR accepts no liability for any such occurrence or for its consequences.

When power transient suppression is required, the suppressors used should meet the following minimum requirements:

Dissipate energy to match the appropriate application categories as defined by IEEE Standard 587.

Be of the voltage limiting (clipping), or tracking filter type. The suppressor must not clamp the voltage to zero, and must self- recover after the passage of the transient. The suppressor may be of the hybrid type construction that makes use of various technologies in order to meet speed and dissipation requirements.

Upon failure, exhibit a positive indication of its failure such as a blown fuse or tripped breaker.

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Contents Site Preparation Page Audience Safety WarningsPreface Environmental Consciousness About this BookPeripheral Usage Iii References Table of Contents Cable Routing Considerations AC Power Line Transient Protection Revision Record Voluntary Control Council for Interference Vcci Federal Communications Commission FCCCanadian Department of Communications Declaration of Conformity Introduction Site PreparationInterpreting the Model Number Peripherals AC Power and Communications WiringRelated Site Preparation Data Mail Mail Order How to OrderCustomer Responsibilities LAN Communications AC Store Wiring RequirementsParallel System Configuration DiagramPhysical Considerations Operating and Service Clearance Requirements NCR 7455 with Integrated Customer Display and Pcmcia Component Dimensions7453-K005 Cash Drawer NCR 7455 with Integrated Post Customer DisplayNCR 2113 Cash Drawer NCR 2189 Cash DrawerNCR 7194 Thermal Receipt Printer NCR 7162 Receipt PrinterNCR 7158 Thermal Receipt/Impact Printer NCR 7166 Thermal Receipt/Impact PrinterNCR 7196 Thermal Receipt Printer NCR 7455 4x20 Remote Post Customer Display NCR 5972 2x20 Remote Post Customer Display NCR 5973 International Remote Post Customer Display NCR 5972 Remote Table-Top Customer Display NCR 2336-K008 USB RS-232 Port Server NCR 2336-K007 External CD-ROM DriveComponent Weights Ventilation Clearance Maximum Input Power Specifications Power RequirementsCable Routing Considerations Thermal Test Points Considerations for Enclosed InstallationsService Access System Cables Cable Type Cable Name NCR Part No Corp. ID No USB, 1- or 4-Meter Cable IllustrationsDual Cash Drawer, Y-cable Ethernet, 10/100 Base-T7162/7166/7196 Printer Interface Cables RS-232NCR 5972 Remote Customer Display and Adapter Cables SMK External Parallel CableAutomatic Change Dispenser Serial Cable Power, ACHumidity TemperatureEnvironmental Requirements Barometric PressureSite Preparation Appendix a Transient Protection AC Power Line Transient ProtectionData Line Transient Protection Index Ii Index Page B005-0000-1286 April Printed on recycled paper