Surge Arresters UltraSIL™ Housed VariSTAR® Surge Arresters 10 kA Class 2 – IEC 60099-4 for MV Systems to 30 kV Installation and Service Instructions Service Information IS235-39-1 GENERAL The Cooper Power Systems UltraSIL™ housed distribution class MOV arresters provide overvoltage protection to medium voltage electrical distribution systems. STAINLESS STEEL LINE TERMINAL METALLIC ELECTRODE ULTRASIL SILICONE RUBBER HOUSING CAUTION: This arrester should be installed only by personnel familiar with good safety practice and the handling of high voltage electrical equipment. These instructions are not intended to supersede or replace your company’s safety and operating procedures. The installation requirements of national and local codes must be observed. ! WARNING: Always handle surge arresters – packed or unpacked – carefully. Do not drop, jar, or handle an arrester roughly. Dropping, jarring, and rough handling may damage the arrester. Concealed internal damage and external damage can shorten the service life of the arrester significantly. Never install a damaged arrester. A damaged arrester may react violently, causing severe personal injury and property damage. METAL OXIDE VARISTOR (MOV) DISKS METALLIC ELECTRODE ! CAUTION: Do not install an arrester if the voltage rating (Ur), and COV (Uc) data are not exactly the same on the arrester nameplate and the carton label. Do not install the arrester if the COV (Uc) is less than the maximum line to earth system voltage. Erroneous installation may cause a violent fault on the system with the potential for personal injury and property damage. ! OPTIONAL EARTH LEAD DISCONNECTOR INSTALLATION ■ ■ Pres. Rel. 40 kA rms Cert. IEC60099-4 Cat. No. __________ Serial No. _________ Frequency Altitude 50-60 Hz 0-12000 ft. 0-3600 N VARISTAR® SURGE ARRESTER ULTRASIL™ TYPE UHS-ZNO IN = 10 kA CLASS 2 IEC 60099-4 P.R. = 40 kA sym ■ UltraSIL Arrester Auxillary Nameplate UltraSIL Nameplate Stamped in Stainless Steel Top Cap. CAUTION: Make all electrical connections – earth and line – so that no undue mechanical stress is applied to the surge arrester. Excessive mechanical stress will damage the arrester. ! STAINLESS STEEL EARTH TERMINAL OPTIONAL INSULATED MOUNTING BRACKET In the event that your company has not established safety and operating procedures for installing surge arresters to, or removing them from a circuit, we suggest the following: YYYY RATING, Ur ___ kV rms COV, Uc ___ kV rms Class 2 SOLID, BONDED HOUSING INTERFACE FIBERGLASS REINFORCED EPOXY AUXILIARY NAMEPLATE Figure 1. Cutaway illustration of an UltraSIL housed VariSTAR arrester. ■ Olean, NY USA VariSTAR Surge Arrester STAINLESS STEEL CAP WITH STAMPED PERMANENT PRODUCT INFORMATION ■ ■ Install all mounting hardware on the arrester. Torque the insulated mounting bracket hex nut to 27 Nm (if bracket is supplied). De-energize the electrical system. Select a mounting location as close as possible to the apparatus that the arrester is to protect. Make the line lead and earth lead as short and direct as possible. Connect the earth lead to the arrester earth terminal stud. Torque the hex nuts to 27 Nm, maximum. NOTE: Make the arrester earth connection as short and direct as possible to a solid, effective, permanent, low-resistance earth connection. If the arrester has an earth lead disconnector (isolator), the earth lead must be flexible to allow the disconnector to operate properly. Connect the line lead to the arrester line terminal stud. Torque the hex nut to 27 Nm, maximum. Energize the electrical system. These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide directions for meeting every contingency during installation, operation, or maintenance. When additional information is desired to satisfy a problem not covered sufficiently for the user’s purpose, please contact your Cooper Power Systems sales engineer. April 2003 • New Issue Printed in U.S.A. 1 UltraSIL™ Housed VariSTAR® Surge Arresters 10 kA Class 2 – IEC 60099-4 for MV Systems to 30 kV Installation and Service Instruction ARRESTER CANTILEVER STRENGTH IS 115 Nm FOR ALL RATINGS USING INSULATED MOUNTING BRACKET DIAMETER (ALL FIGURES): 106 mm MOUNTING HOLE FOR 1/2" OR 12 MM Ø HARDWARE MOUNTING HOLE FOR 1/2" OR 12 mm Ø HARDWARE ULTRASIL HOUSED ARRESTER – WITH OPTIONAL INSULATED MOUNTING BRACKET AND NO DISCONNECTOR ULTRASIL HOUSED ARRESTER – WITH OPTIONAL INSULATED MOUNTING BRACKET, AND DISCONNECTOR ARRESTER CANTILEVER STRENGTH IS 300 Nm (ALL RATINGS) MOUNTING HOLE FOR 1/2" OR 12 mm Ø HARDWARE ULTRASIL HOUSED ARRESTER WITH OPTIONAL CONDUCTIVE BRACKET AND WITHOUT DISCONNECTOR ULTRASIL HOUSED ARRESTER – WITH NEMA CROSS-ARM HANGER Figure 2. UltraSIL mounting options. ■ OPTIONAL INSULATED MOUNTING BRACKET Mark the temporary earth connection to make sure it is removed before the arrester is reinstalled. Disconnect the arrester earth lead(s) from the circuit. Energize the electrical system. HEX NUT* ■ LOCK WASHER ■ FLAT WASHER FIELD TESTING NEMA HANGER BRACKET (OR OTHER) All UltraSIL housed arresters have passed a complete series of production tests prior to shipment; therefore, no field testing prior to initial energization is necessary. Never, even briefly, apply any power frequency voltage in excess of COV (Uc) as stamped on the arrester top cap. There are currently no industry accepted methods for field testing of arresters. (1/2" OR 12 mm Ø) BOLT CAUTION: Before performing any test on an arrester, contact Cooper Power Systems. Test procedures may damage the arrester externally and/or internally, shortening its service life significantly. ! INSTALLATION OF ARRESTER TO NEMA HANGER BRACKET. Figure 3. Installation of arrester to NEMA hanger bracket. *Torque of hex nut to 27 Nm max. REMOVING AN ARRESTER FROM A CIRCUIT ■ ■ ■ De-energize the electrical system. Disconnect the arrester line lead(s). NOTE: A small amount of static charge may be retained in an arrester when it is removed from an energized circuit. Discharge the arrester by attaching the line terminal to a temporary ground. © 2003 Cooper Industries, Inc. VariSTAR® is a registered trademark of Cooper Industries, Inc. UltraSIL™ is a trademark of Cooper Industries, Inc. Rev. 0 2 WARNING: Always consider an arrester to be energized until both the line and the earth leads have been disconnected. ! Cooper Power Systems, Inc. reserves the right to make changes to its product specifications, performance data or characteristics, at any time, without prior notice, and without creating any obligations on its part. Accordingly, the use of the information contained herein creates no liability on the part of Cooper Power Systems, Inc. P.O. Box 1640 Waukesha, WI 53187 www.cooperpower.com MI 4/03