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Summary of Contents for Asco 425
- Page 1 Surge Protective Devices Installation & Operation Manual Model 425...
- Page 2 Installation, Operation and Maintenance Manual IO-70060 RevC 12-17...
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Page 3: Table Of Contents
ASCO SURGE PROTECTIVE DEVICE INSTALLATION, OPERATION AND MAINTENANCE MANUAL TABLE OF CONTENTS INTRODUCTION Industry Nomenclature Changes Figure 1: NEC® Article 285 & UL 1449-4 Parts List INSTALLATION Figure 2: Leads Short & Straight Figure 3: Typical Panel Installation Figure 4: Flush Mount Diagram Figure 5: Dimensions &... -
Page 4: Introduction
In the late 2000’s, there were significant nomenclature changes associated with a revision to UL 1449 and 2008 NEC® Article 285. Model 425 complies with the latest regulatory actions and is UL 1449 & CSA 22.2 No. 269, Listed as such (VZCA.E321351). There is an emphasis on installation location, identified as Types 1, 2 and 3, outlined below. -
Page 5: Parts List
The Model 425 are available as Type 1 or Type 2 SPDs per UL 1449 and CSA 22.2 No. 269. (Construction is identical for Type 1 and Type 2 Model 425s.) Type 1 SPDs are evaluated more rigorously by UL 1449 for NEC®... -
Page 6: Installation
Never Hi-Pot test Any SPD (will prematurely fail SPD). • Do not install Model 425 through the bottom of a NEMA 3R panel. (Accumulating water could drip into the SPD, prematurely failing the SPD a sealed pipe nipple installed in the SPD rising above the water line may be a solution). -
Page 7: Figure 3: Typical Panel Installation
▪ Locate SPD close to intended breaker ▪ Keep Leads Short as Possible ▪ Avoid Sharp Bends BREAKER ▪ Rotate Model 425 such that LED indicator is most visible ▪ Outdoor installation requires appropriate weather sealing at nipple (gasket, sealing conduit, etc.) -
Page 8: Voltage Rating & Application
Before installing SPD, verify by nameplate voltage or model number that it has the same voltage rating as the power distribution system. See attached Data Sheet or call ASCO Tech Support at (800) 237-4567 as appropriate. The SPD’s specifier or user should be familiar with the configuration and arrangement of the power distribution system. -
Page 9: Spds On Ungrounded Systems
SPDs on Ungrounded Systems Caution – Ungrounded systems are inherently unstable and can produce excessively high line-to-ground voltages during certain fault conditions. During these fault conditions, any electrical equipment including an SPD, may be subjected to voltages which exceed their designed ratings. This information is being provided to the user so that an informed decision can be made before installing any electrical equipment on an ungrounded power system. -
Page 10: Normal Operation
NORMAL OPERATION Green LED Indicator Each phase has an LED indicator, which illuminates when the SPD is energized and operating correctly. SPDs equipped with Neutral-Ground protection include a N-G LED at one end of the translucent white label window. SPDs without N-G protection such as those for Delta power systems do not include this feature. - Page 11 Installation, Operation and Maintenance Manual IO-70060 RevC 12-17...
- Page 12 14550 58th Street North While every precaution has been taken to ensure accuracy and completeness in this literature, ASCO assumes no responsibility, and disclaims all liability for Clearwater, Florida 33760 damages resulting from use of this information or for any errors or omissions.
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