Installation, Operation and Maintenance Manual
IO-70063 RevD 03-18
4
INTRODUCTION
Thank you for choosing an ASCO Surge Protective Device (SPD). This is a high quality, high energy surge
suppressor designed to protect sensitive equipment from damaging transient overvoltages.
Proper installation is important to maximize performance. Please follow steps outlined herein.
This entire Operation & Maintenance Manual should be read prior to beginning installation. These
instructions are not intended to replace national or local codes. Follow all applicable electrical codes to
ensure compliance. Installation of this SPD should only be performed by qualified electrical personnel.
ASCO SPDs are extensively tested in accordance with industry standards such as ANSI/IEEE C62.41.1,
C62.41.2, C62.45, C62.62, C62.72, UL 1449, UL 1283, IEC 61643, etc.
This SPD is a single-port parallel-connected device intended for service entrance, panelboard or
downstream installation for IEEE Category C, B or A applications.
Major Industry Nomenclature Changes Effective 2008-2009
Be aware that UL 1449 Fourth Edition and 2008 NEC® Article 285 generated substantial changes.
•
The term TVSS changed to SPD
•
Types 1, 2, 3 & 4 SPDs are created
•
UL 1449 clamping voltage performance testing changed from 500A to 3,000A
•
UL 1449 added new I nominal testing (I
n
), which consists of more rigorous duty-cycle testing
This SPD complies with the latest regulatory actions and is UL Listed as such.
For further information, please review latest editions of NEC® Art. 285, UL 1449 or contact ASCO Tech
Support at (800) 237-4567.
FIGURE1: NEC® ARTICLE 285 & UL 1449-4
SPD Types: Types 1, 2, & 3
Based on Location within electrical distribution system
(also coincides with ANSI/IEEE C62.41.2 - 2002 Categories C, B & A)