POWER SYSTEMS, INC. DynaVar - grupo dielec

1 Section 30- . POWER SYSTEMS, INC. 30. DynaVar . Station Class and Intermediate Surge Arresters NOTE: Because Hubbell has a policy of continuous product improvement, we reserve the right to change design and specifications without notice.. Copyright 2006 Hubbell/Ohio Brass OHIO BRASS AIKEN, SC JULY 2006. Printed in USA RGS 10M.. 30- . Table of Contents POWER SYSTEMS, INC. Page Introduction General Arrester With the introduction of the station class Type PVN, Arrester Ohio Brass has expanded its line of polymer - housed Pressure arresters for distribution, substation and transmission Temporary Overvoltage applications. PVN arresters are suitable for applications polymer housed up through 230 kV. The PVI arresters are suitable for ESP Weathershed applications up through 138 kV. These designs combine the advantages of a polymer housing and metal-oxide varistor valve blocks, and of- Seismic fer the benefits of a one piece arrester construction for Key to the Catalog all voltage ratings.

2 Stacking of individual arrester units PVI polymer housed Intermediate is not required with polymer housings. Protective Dimensions and Also available are porcelain and silicone station (Type PVI VN, SVN and VL) arresters. PVI All DynaVar Intermediate and Station Class Surge Mounting Arresters in this catalog comply with ANSI/IEEE PVI-LP polymer housed Intermediate Class Standard In addition, they are tested to IEC 99-4. Dimensions and Protective The Type PVN Station Class Arresters described in this PVIA Intermediate Class Surge publication are protected by patent numbers 4,656,555; Dimensions and 4,899,248; 4,905,118; 5,043,838; 5,138,517; 5,159,159 Protective and others pending. PVN polymer housed Station The Type PVI Intermediate Class Arresters described Protective in this publication are protected by patent numbers Mounting 4,656,555; 4,899,248; 4,905,118 and others pending. Dimensions and Grading PVN Packaging (PVI/PVN)..15. Warranty - Material Hubbell POWER Systems, Inc.

3 Warrants all products sold by it to be merchantable (as such PVN term is defined in the Uniform Commercial Code) and to be free from defects in material and Base Mounting workmanship. Buyer must notify the Company promptly of any claim under this warranty. The Crossarm Buyer's exclusive remedy for breach of this warranty shall be the repair or replacement, factory, at the Company's option, of any product defective under the warranty which is returned Discharge Counters (PVI/PVN)..15. to the Company within one year from the date of shipment. NO OTHER WARRANTY, WHETHER Insulating Subbases (PVI/PVN)..15. EXPRESS OR ARISING BY OPERATION OF LAW, COURSE OF DEALING, USAGE OF TRADE OR OTHERWISE IMPLIED, SHALL EXIST IN CONNECTION WITH THE COMPANY'S. PRODUCTS OR ANY SALE OR USE THEREOF. The Company shall in no event be liable for PVNA polymer housed Station Class any loss of profits or any consequential or special damages incurred by Buyer. The Company's Surge warranty shall run only to the first Buyer of a product from the Company, from the Company's Dimensions and distributor, or from an original equipment manufacturer reselling the Company's product, and is non-assignable and non-transferable and shall be of no force and effect if asserted by any per- Protective son other than such first Buyer.

4 This warranty applies only to the use of the product as intended VL and VN Porcelain housed Station Class by Seller and does not cover any misapplication or misuse of said product. Warranty - Application Hubbell POWER Systems, Inc. does not warrant the accuracy of and results from product or Application system performance recommendations resulting from any engineering analysis or study. This applies regardless of whether a charge is made for the recommendation, or if it is provided free Description and of charge. Protective Responsibility for selection of the proper product or application rests solely with the purchaser. In the event of errors or inaccuracies determined to be caused by Hubbell POWER Systems, Inc., its Dimensions and liability will be limited to the re-performance of any such analysis or study. SVN polymer housed Catalog Ordering Protective Dimensions and Discharge Insulating Arrester Routine & Design JULY 2006 OHIO BRASS AIKEN, SC.

5 30- . POWER SYSTEMS, INC. General Arrester Information NORMALLY RECOMMENDED STATION DynaVar Pressure Relief MCOV FOR VARIOUS system VOLTAGES Pressure Relief Capability-Symmetrical rms kA. Arrester ANSI Standard Ohio Brass Arrester MCOV (kV). Type Minimum Demonstrated Values system Temporarily Ungrounded, VLA* 10. None L-L Voltage Impedance Grounded or VL* 65. Grounded 40-65. kV Ungrounded Circuits VN* 93. Neutral 40-65. Nominal Maximum Circuits (1) (2) SVN* 40-65 63. PVN** 40-65 80. PVNA** 40-65 40. PVI** 60. PVI-LP** PVIA** 12 * Rating for initial venting only. ** polymer arresters will survive multiple venting operations. All DynaVar station-intermediate arresters exceed pressure 22 relief requirements of ANSI 24 22. 23 22 Energy Capability 22 24 Kilojoules per kV of MCOV. 22 29 36 Max. Energy Discharge 46 29 39 48 Type Capability kJ/kV - MCOV. 69 42 57 70 PVNA, PVI, PVI-LP (1). 115 121 70 98 115. PVIA (4). 138 145 84 115 131. 161 169 98 140 152 PVN (2).

6 230 242 140 209 220 VL/VLA (2). 345 362 209 VN (3). 400 420 245 SVN (3). (1) For currents .65kA or less (1) For normal duty. Line-to-ground fault up to 30 minutes. (2) For currents or less (2) For severe duty. Line-to-ground fault up to 2,000 hours. (3) For currents kA or less (4) For currents .4 or less Arrester Application Switching surge capability of DynaVar arresters is expressed The DynaVar arrester is described by its maximum continu- in terms of dissipated energy. ous line-to-ground operating voltage (MCOV). The arrester's These capabilities assume a two shot energy discharge takes most important application criterion is the maximum voltage place within one minute. which can be continuously applied. The indicated current levels are not an arrester limitation, but For effectively grounded neutral systems, any DynaVar ar- are related to the indicated energy capability. rester with MCOV equal to maximum line-to-neutral kV is the Calculations based on the conservative assumption that the normal application.

7 For example, a 138 kV system usually entire line length is charged to maximum surge voltage are has a maximum line-to-line continuous voltage of 145 kV rms. easily made, and the values obtained seldom exceed the 145 kV divided by 3 gives 84 kV line-to-ground voltage. The considerable energy capability of the DynaVar arrester. appropriate DynaVar arrester for this application is the Dyna- Var 84, with MCOV of 84 kV. Temporary Overvoltage Capability For ungrounded or impedance grounded systems, the gap- DynaVar arresters are gapless and consist of a column of metal- less DynaVar arrester's temporary overvoltage capability is oxide blocks connected between line and ground. The blocks used. For applications where a ground fault is expected to be can withstand a significant POWER frequency overvoltage for a removed within 30 minutes, the minimum MCOV is maximum limited time, depending on the magnitude of any immediately system line-to-line voltage divided by For extended preceding surge duty.

8 This duty can be the result of switching operation under ground fault conditions up to 2,000 hours but surges on higher voltage lines, or from other sources. The energy not to exceed five percent of service life, the minimum MCOV discharge capability is found in the above table. is maximum system line-to-line voltage divided by All of the TOV curves are available in the Design Test Reports DynaVar arresters are designed to be used where average which are listed on page 30-29. The Design Test Reports are ambient temperature does not exceed 40 C (104 F) and the available on our web site com or daily maximum temperature does not exceed 60 C (140 F). by calling an Ohio Brass representative. The temporary over- voltage capability can be determined from this curve. The prior duty curve of this table is based upon absorption of rated energy immediately preceding application of the overvoltage. OHIO BRASS AIKEN, SC JULY 2006.. 30- . POWER SYSTEMS, INC.

9 polymer housed Arresters (Type PVI and PVN). Description Benefits The Type PVI & PVN arresters contain the same high-qual- The PVI and PVN arresters have many additional benefits ity metal-oxide varistors used in other Ohio Brass DynaVar that are included with the polymer housing. arresters which have operated successfully since 1981. A PVI or PVN arrester unit are less than half the weight They have all the MOV advantages such as high temporary of an equivalent porcelain- housed arrester. This makes overvoltage capability, contamination resistance, improved transportation, handling and installation much easier. surge-duty capability and excellent protective characteristics. All voltage ratings are of single unit design. Field assembly In the unlikely event of arrester failure, violent fragmenta- of stacked units is not required. tion of porcelain is eliminated. Instead, the higher available With a reduced diameter of energized line terminal and fault currents may cause splits or tears in the polymer rubber grading rings, the PVI and PVN arresters reduce space housing while the internal fiberglass wrap restrains the valve requirements.

10 Elements. The polymer housing makes the PVI and PVN arresters Weight is greatly reduced compared to conventional porce- much safer than porcelain arresters. lain- housed designs. Installation is simplified because with the reduced weight, a patented, single housing design can be Single-unit, high voltage design provides improved con- utilized for all arrester voltage ratings. tamination performance over multi-unit designs. The small diameter line end terminal hardware permits closer Closer spacing Smaller line end casting and smaller phase-to-phase and phase-to-ground spacings useful in mod- grading rings allow closer phase-to-phase spacing. ern compact substation designs and on mobile transformer Increased creepage Standard units may fulfill high applications. creep requirements. Minimal Internal Atmosphere Will not breathe or leak, eliminates moisture ingress, a cause of arrester failure. ESP Weathershed Material SEISMIC PERFORMANCE: All PVI up to 84kV MCOV, and The arrester housing is made of ESP silicone alloy weather- all PVN up to 115 kV MCOV meet IEEE 693 as of 1997 High shed material that has been successful in field operations for Performance Level.