Make the Move to the Highest TOV Rated Elbow Arrester in the
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Make the Move to the Highest TOV Rated Elbow Arrester in the Industry Cooper Power Systems 33 kV and 36 kV M.O.V.E.™ arresters with superior temporary overvoltage characteristics (TOV) provide protection from lightning and other surges on underground collector systems. Protect your investment with the next generation of underground surge arresters. Reduce costly outages, damaged equipment, and added operating costs The significant investment associated with underground cable and equipment installation, and the high costs associated with replacement, demand the best protection from the effects of temporary overvoltages available. Nowhere is this more critical than in renewable energy collector systems where high voltage swings and temporary overvoltages (TOV) are very common. These overvoltages risk damage to the feeder cable, transformer, and turbines, resulting in potentially expensive outages. Unlike conventional underground distribution systems which are typically four-wire, multi-grounded systems, today’s renewable energy collector systems are typically 34.5 kV ungrounded, or poorly grounded delta systems. Highest TOV Ratings in the Industry ■■ 36 kV — highest TOV characteristics in the industry, higher than any previous offering ■■ Overvoltages on ungrounded collector system cable can be greater than 173% of normal distribution systems ■■ Broad offering of ratings — choose the specific elbow arrester required for each application ■■ Faults on these poorly grounded systems can cause over voltages exceeding the phase-to-phase voltage of 34.5 kV ■■ Greater protection capability of cable and equipment ■■ ■■ It is critical that the underground elbow surge arrester survives these TOV events in order to continuously provide maximum protection to the system Arrester that will survive higher overvoltages – reducing downtime ■■ Increased system reliability by protecting the entire string of transformers ■■ Designers of collector systems must be concerned with the ability of the specified elbow arresters to withstand voltages exceeding the normal line-to-ground voltages ■■ Longer product life and dependability due to higher TOV capability The next generation of 35 kV class M.O.V.E. (Metal Oxide Varistor Elbow) arresters are now offered at higher voltage ratings with enhanced TOV characteristics. The new ratings are designed to meet collector systems demand for overvoltage protection schemes. Cooper Power Systems superior disk technology and construction incorporated into these new arresters provide the highest TOV characteristics available in the industry. No other underground arrester can compare. TOV Performance M.O.V.E. Arrester Family 55.00 50.00 36 kV M .O.V.E 33 kV M .O.V.E TOV (kV) 45.00 40.00 30 kV M .O.V.E 27 kV M .O.V.E 35.00 30.00 Nearest Competor 36 kV MOV 25.00 M.O.V.E. Arresters www.cooperpower.com DirectConnect M.O.V.E. Arresters 0.1 1 10 100 Time (Seconds) 1000 10000 33 kV and 36 kV M.O.V.E™ Elbow Arrester DirectConnect M.O.V.E. Arrester Typical wind farm construction designs require three elbow arresters at the end of each string of wind turbines. This means the elbow arresters are placed on an open point within transformer equipment. Traditional means of installation require a bushing extender, loadbreak reducing tap plug, and an elbow arrester in order to install on the 600A 35 kV bushings. This can pose several issues: ■■ Clutter inside the cabinet due to multiple components ■■ Small enclosures may not be able to fit the resulting stacking height ■■ Potential for cross threading during installation of the loadbreak reducting tap plug and bushing extender ■■ Labor intensive installation method ■■ Expense of purchasing three components for every open point Cooper Power Systems offers a simple solution to open point installations with the DirectConnect M.O.V.E. arrester — able to be installed directly on the 600A 35 kV bushing. Simply thread the adapter into a standard 600A bushing and install the DirectConnect M.O.V.E. elbow arrester into that bushing — the probe inside the arrester latches into the adapter. DirectConnect M.O.V.E. Arrester Threaded Standard Adapter 600A Bushing No need to worry about clutter in the cabinet or fitting your cable accessories in small enclosures with the DirectConnect M.O.V.E. arrester. Not only does this design save you material costs, but it also reduces overall labor expenses. The DirectConnect M.O.V.E. arrester is the answer: ■■ Reduce costs • Replace three components with one DirectConnect M.O.V.E. Arrester Bushing extender Loadbreak reducing tap plug Elbow arrester • Reduce stocking requirements • Cut installation time by 80% to achieve overall labor savings ■■ Reduce stacking height by 50% • Fit into smaller enclosures • Reduce pulling force due to elimination of cantilever effect ■■ Retrofit easily into existing installations 23.54 Traditional Installation 10.76 DirectConnect Protect What You Connect 1. Durability MOV disks are rigidly bonded into a single assembly with highly conductive silver loaded epoxy. Bonded disk stack guarantees there will be no air pockets, moisture, or pinched rubber between the MOV disks during installation to compromise the current path and overheat the assembly. Proprietary in-house block construction provides best-in-class performance. 2. Reliability Disk stack glass collared surface is buffed smooth for improved reliability. 3 Glass is a stronger dielectric, and resists water absorption better than other block designs. Cooper Power Systems MOV stacks are buffed smooth for corona-free performance. 3. Flexibility 1 Flexible welded tin-plated copper leads join brass probe and retainer to the disk stack. 2 The welded connection gives the most reliable current path at the most critical terminal of the disk stack. The flexible joint assures the connection will not be damaged during installation or operation. 4. Performance Aluminum spring shunt helps achieve optimum discharge voltage characteristics for longer cable life. 5 4 The shunt drastically shortens the ground lead length of the arrester by allowing current to bypass the full length of the spring. Consequently, less voltage is impressed on the cable insulation during a surge. 5. Submersibility EPDM rubber housing, deadfront construction. Cooper Power Systems mixes and blends its EPDM rubber and insulation formula in-house to exceed IEEE Std 386™-2006 standard. We offer more than 40 years of experience molding and designing underground EPDM separable connectors. Open Point Overvoltage Protection with M.O.V.E. Arresters M.O.V.E. Arrester Cooper Power Systems has a proven track record in manufacturing and designing underground arresters Flexibility of Installation Design Tests ■■ 200 A large interface loadbreak bushings ■■ 600 A deadbreak bushing adapters ■■ BT-Tap and T-OP II separable connectors ■■ Easily retrofittable on BOL-T separable connectors ■■ Also available in 600 A DirectConnect elbow arrester package • IEEE Std 386™ - 2006 standard, Separable Insulated Connector Systems • IEEE Std C62.11™ - 2005 standard, Metal Oxide Surge Arresters for AC Power Circuits M.O.V.E Arrester Production Tests IEEE Std 386™-2006 standard testing • Partial Discharge Extinction Voltage Level DirectConnect version, standard arrester connected to a T-Body, and standard arrester connected to bushing extender • AC 60 Hz 1 Minute Withstand Tested according to Cooper Power Systems requirements: • 100% Physical Inspection • Periodic Dissection • Varistor Disks Ensure the Benefits Of M.O.V.E.™ Arresters for Your System Specify the following: ■■ Total compliance to IEEE Std 386™ -2006 standard ■■ Total compliance to IEEE Std C62.11™-2005 standard, including full certification to the deadfront arrester failure mode safety test ■■ Glass collared MOV disks with smooth outer surface ■■ MOV disks bonded with conductive silver loaded epoxy ■■ Highly conductive shunts for all springs ■■ Welded flexible leads to connect probe retainer to the disk stack • Watts Loss at MCOV x 1.25 • Voltage at 1mA • 100% Partial Discharge at MCOV x 1.05 • Periodic X-ray Analysis Performance Test Characteristics: • Duty Cycle 35 kV M.O.V.E. Arrester Ratings Duty Cycle (kV) MCOV Rating (kV) 35 kV Class Interface 1A Large Interface –– Voltage at 1 Vref –– Batch Life Test Standard M.O.V.E. Catalog Number DirectConnect Catalog Number 18 15.3 3238020C18M — 21 17.0 3238020C21M — 24 19.5 3238020C24M — 27 22.0 3238020C27M DCEA635M27 30 24.4 3238020C30M DCEA635M30 NEW 33 27.0 3238020C33M DCEA635M33 NEW 36 29.0 3238020C36M DCEA635M36 –– 22 current surges of 5 kA crest 8/20 µs waveshape • High-Current, Short-Duration Discharge –– 2 current surges of 40 kA crest 4/10 µs waveshape • Low-Current, Long-Duration Discharge –– 20 current surges of 75 A crest 2000 µs rectangular wave duration Cooper Power Systems 2300 Badger Drive Waukesha, WI 53188 P: 877.CPS.INFO One Cooper | www.cooperpower.com | Online B235-11029 • 0911 Cooper Power Systems and DirectConnect are valuable trademarks of Cooper Industries in the U.S. and other countries. You are not permitted to use the Cooper Trademarks without he prior written consent of Cooper Industries. IEEE Std 386™ and IEEE Std C62.11™ standards are trademarks of the Institute of Electrical and Electronics Engineers, Inc., (IEEE). This publication/product is not endorsed or approved by the IEEE. ©2011 Cooper Industries. All Rights Reserved
