138 kv lightning arresters pdf

Mar 30, 2011 lighting and voltage surge lightning can create voltage surges in several of the following ways. Class surge arrester incorporates the industry recognized superior silicone rubber. Figure 6 8 kv transmission line 1 figure 7 8 kv transmission line 2 figure 8 69 kv transmission line nb power developed work methods to install many of the lightning arresters safely under energized conditions. Pdf theoretical and analytical investigation of lightning over. Application studies of line arresters in partially shielded.

Type moa rated voltage kvrms mcov kvrms current impulse residual voltage 2ms rectangular current impulse withstand acrest 410. Type polimhm surge arresters maximum system voltage 2. I o is peak lightning current h a is average height of line y is the distance from line of lightning stroke most typical of lightning fashovers on a distribution line much less energy than a direct strike. Surge and lightning arresters eaton s mission is to improve the quality of life and the environment through the use of power management technologies and services.

Abb surge arresters are the primary protection against atmospheric and switching over voltages. Computational analysis with the aid of alternative transient programelectromagnetic transient program atpemtp simulations was performed on a section of the affected lines to. A lightning arrester is essentially a collection of billions of microscopic junctions of metal oxide grains that turn on and off in microseconds to form a current path from the top terminal to the ground terminal of the arrester. Two outages resulted when a 69 kv arrester failed under lightning conditions. Abb has more than 100 years of experience in designing and manufacturing surge arresters and protection devices. Vx arresters apply for system voltages 500 kv and above and utilize. Highvoltage surge arresters digital asset management.

On three phase systems, the line to ground voltage is equal to the phase. This table documents how well the arrester clamps lightning and switching surges, which is the fundamental purpose of arresters. The scope of this document is to provide technical requirements for the supply of hv surge arresters for system from 12 kv to 245 kv in the enel group distribution companies, listed below. Shreem as a company grown from capacitor manufacturing and turnkey jobs in project started no of divisions to fulfill its projects division. The first devices are of the socalled cathode drop type. The hollow core type arrester is built with extrahigh, energyrated. Intermediate and station class surge arresters ieee iec eaton.

Table i surge arrester data rated voltage system voltage line arresters station arresters 8 kv 120 kv 108 kv 230 kv 210 kv 192 kv the design probability for each flash to the shield wires. Maximum system voltage up to 362 kv comply with ieee c62. Medium 20mmkv um heavy 25 mmkv um very heavy 31 mmkv um application classification. Mediumvoltage surge arresters surge arresters are used for protection of electrical equipment from all kind of overvoltages caused by lightening or switching operations. The appropriate dynavar arrester for this application is the dynavar 84, with dutycycle rating of 108 kv. The application on 8 kv systems has been more successful than in lower. The zip arresters consistently withstand the following minumum design tests. Arresters can also be installed on all phases to provide even greater protection. Lamco offers a complete range of surge arresters uhv, ehv, mhv and lhv ac dc solutions upto 1200kv. Arresters can be installed on the top phase only on single pole construction allowing the top phase to shield the outside phases from lightning. Jul 25, 2014 amtrak converter station recorded video of a 8 kv lightning arrestor blowing off the steal. Back flashover faults resulting from lightning strokes hitting the shield wires or towers are one of the major causes of power interruptions on the doublecircuit 698 kv overhead transmission lines in jamaica.

Tab 8 surge arresters distribution system engineering course siemens unit 10. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power more safely, more efficiently and more reliably. Pdv100 arresters are tested to meet or exceed the requirements of iec 600994, 200405 edition 2. Lightning protection and surge arrester application on nb. Vn and vs arresters cover the range of system voltages from 69 kv thru 400 kv and utilize 75nm diameter valve elements. Lightning overvoltage has been identified as the major problem of overhead transmission lines tripping in malaysia due to high incidence of keraunic activities. The model predicts a 55% reduction in the double circuit. The station arresters are built to exacting specifications and tested to ieee or iec requirements for years of reliable service. Table i surge arrester data rated voltage system voltage line arresters station arresters 8 kv 120 kv 108 kv 230 kv 210 kv 192 kv the design probability for each flash to. Arresters with lower or higher rated voltages may be available on request for special applications. The lightning performance of transmission lines is very important for electric utilities around the world, since lightning is a major cause of outages of overhead lines. The remainder of the arresters were installed during a short outage. Illustration of 10 kv ultrasil polymerhoused varistar stationclass arrester.

Transmission line lightning performance mitigation shield. These surge arresters cover the system voltages up to 362kv as summarized in fig. Type pexlim surge arresters 72362 kv protection of high voltage system assets. The appropriate dynavar arrester for this application is the dynavar 84, with mcov of 84 kv. For ungrounded or impedance grounded systems, the gap. This decision is based on whether or not the system is grounded and the method of system grounding. Based on the studies conducted by the national utility. It can strike the overhead power line which enters your house, or a main power line that is blocks away from your home. Lightning strikes near line and induces a voltage on it v max 38.

Pdf brazilian production development of class 2 polymeric surge. Application of line surge arresters in power distribution and. The range comprises of ac and dc solutions up to 1,100kv and arresters for special applications like railways, dcvoltage limiting devices and many other purposes. Xps station class siliconehoused arresters metal oxide surge arrester xps 2 performance data maximum system voltages vm 2. Single column polymeric surge arresters ieee energy single column polymeric surge arresters ieee paa pba pca maximum system voltage umax kv 145 242 420 system voltage unom kv 8 230 400 lightning impulse classifying current. The arrester designs are tested in accordance with the latest industry standards for metal oxide arresters. Three phase surge arrester az04d for 145 kv gis, elk04 c english pdf leaflet texlim product note english pdf leaflet surge arrester zno block testing english pdf leaflet high voltage surge arresters product line card english pdf leaflet banner mediumvoltage surge arresters english pdf rollup. Ultrasil polymerhoused varistar stationclass surge arresters. Thirtyfive sic surge arresters of nominal voltages 88 kv, 8 kv, 230 kv, 345 kv and 440 kv, from five manufacturers, were considered. With prior duty equal to the thermal energy rating of 8 kjkv ur. Pdf one of the main problems in high voltage networks is over voltages due to lightning. Housed varistar type us, uh and ux stationclass surge arresters. Ii design criteria for electrical facilities connected to the.

Surge arresters are the most effective and most costly improvement the least costly improvement is to add a second down lead. The overvoltage capability of dynavar can be taken. An analysis of reducing back flashover faults with surge. Discharge voltage table in every arrester datasheet, you will find a most important table about the discharge voltage of the arrester in question. Lightning arrester or surge arrestors manufacturers in india. The appropriate dynavar arrester for this application is the dynavar 84, with dutycycle rating. An analysis of reducing back flashover faults with surge arresters on 69 8 kv double circuit transmission lines due to direct lightning strikes on the shield wires authors. The evaluation of the surge arresters was conducted at the ieeusp high voltage laboratory. The principal characteristics of each type of surge arrester are summarized in table 1. A 196 175 8 100 50 66 kv sm 72,5140325 50 60 48 10 31,5 ka 0,2s clase a 222 198 156 100 50 45 kv sl 52.

Arresters for 8 kv and 230 kv applications are also available. Surge arrester data rated voltage system voltage line arresters station arresters 8 kv 120 kv 108 kv 230 kv 210 kv 192 kv the design probability for each flash to the shield wires is then 0. Vl and vla arresters are applied on systems below 69 kv and lise 60mm diameter valve elements. The lightning arrestors are used for protection of incoming and outgoing line and also of the power transformers from lightning surge as well as from power frequency over voltage. Abb offers a complete range of surge arresters for high and medium voltage applications.

Pdf energy discharge capability of surge arrester for. The simulation was done once when the lightning strikes a transmission line and a substation with no lightning arresters in use and once more with their use. Experience at nb power with surge arresters on transmission lines. Toshiba s directly molded polymer surge arresters, which are the gapless zno element type, comply with ieee standard c62. Illustration of 10 kv ultrasil polymerhoused varistar uxl high strength. In transmission systems up to 8 kv, in brazil, lightning is especially damaging, even in regions with both average lightning density and soil resistivity, since most tripouts are caused by backflashover. The overvoltage energy absorption capability of our zinc oxide surge arrester is as follows. Transmission line substation gis hvdc railroad, generator, motor, reactor, capacitor and svc protection ieeeiec lightning arresters ieeeiec lightning arresters. Te connectivity hv surge arresters are designed and manufactured to the current. High voltage surge arresters station class product overview. The application and selection of lightning arresters. Lighting and voltage surge lightning can create voltage surges in several of the following ways.

Lightning performance of transmission line with and. The program atpdraw alternative transient program was used to simulate the problem and was applied on a part of a power network. Contents definition of surge arresters 02 siemens surge arresters for any requirement 04 always the best solution 05 history timeline 06 movs. Ii design criteria for electrical facilities connected to. Amtrak converter station recorded video of a 8 kv lightning arrestor blowing off the steal.

Mitigating lightning outages on 8 kv transmission lines. Lightning and surge arresters siemens et b1 2005 overview combination arresters are surge arresters that meet the basic requirement of requirement category i and ii, i. Application guide dynavar metaloxide surge arrester. High overvoltage energy absorption capability the zinc oxide arresters can absorb all kinds of energy of lightning and switching surge. The corresponding design charge values were found in fig. Improving lightning performance of the lines is crucial to avoid physical damage to the system equipment, which may result in service interruptions to the electricity consumers. Our permanent research and development and the concerted knowhow in our factories give our surge. When arresters are applied to protect systems from lightning or switching surges, they are installed between the phase and earth. Diagnostic of silicon carbide surge arresters of substation. Application studies of line arresters in partially. Available as singleunit arresters rated up to 300 kv or twinunit arrestors for up to 550 kv, minimizing the. Capability against multiple lightning is greatly improved.

For example, a 8 kv system usually has a maximum linetoline continuous voltage of 145 kv rms. Intermediate and station class surge arresters ieee iec. Lightning arrester or surge arrestors manufacturers in. For this application, the mcov of the installed arrester must be equal or higher to the continuous voltage between the phase and earth. Eaton s cooper power series arresters range from intermediate through stationclass arresters up to 396 kv. These failures were attributed to a high magnitude. The ge tranquell line of surge arrester products provide excellent protective characteristics.