Surge Arrester
ZheXi Electric Power supplies lightning arresters for sale for overhead transmission and distribution lines, substations, transformers and utility power systems. Our range includes polymer-housed zinc oxide surge arresters for different system voltages, from medium-voltage distribution applications to high-voltage transmission projects.
Available products include 10kV, 11kV, 24kV, 33kV, 36kV, 51kV, 110kV and 220kV configurations. OEM/ODM specifications can also be evaluated according to system voltage, grounding method, installation environment and project requirements.
For project selection or tender quotation, send us your system voltage, required arrester rating, MCOV/Uc, nominal discharge current, application, quantity and applicable standard.
Modern power-system surge arresters commonly use zinc oxide metal-oxide varistors to limit overvoltages caused by lightning and switching events.
Under normal operating conditions, the arrester presents high resistance. When an overvoltage occurs, the metal-oxide elements conduct surge current toward earth and limit the voltage appearing across protected equipment.
Polymer-housed designs are particularly suitable for outdoor overhead-line and distribution applications where low weight, mechanical handling, pollution performance and weather resistance are important considerations.
ZheXi offers polymer-housed surge arresters for indoor and outdoor power-system applications, including overhead lines, transformers and substations.
Selecting a lightning arrester for an overhead line requires more than matching the nameplate system voltage.
The rated voltage of the arrester and its maximum continuous operating voltage should be selected according to the power system voltage and grounding arrangement.
An arrester with an unsuitable continuous operating voltage may experience unnecessary electrical stress or fail to provide the required protection level.
Nominal discharge current is an important parameter when comparing surge arresters.
Distribution and transmission projects may require different discharge-current and energy-duty capabilities depending on the application and project specification.
Residual voltage indicates the voltage appearing across the arrester terminals while it is discharging surge current.
It should be coordinated with the insulation withstand level of the transformer, cable termination, switchgear or other protected equipment.
For outdoor lines, buyers should consider pollution severity, UV exposure, temperature, altitude, humidity, salt fog and mechanical conditions.
Polymer-housed arresters are widely used in overhead distribution applications because of their lightweight construction and suitability for outdoor installation.
Projects in coastal, industrial or heavily polluted areas may require greater creepage distance or a housing design adapted to the environmental contamination level.
The protection performance of an arrester also depends on installation location and lead length.
For transformer and distribution-line protection, the arrester should be installed according to the system design and project protection-coordination requirements.
Polymer distribution surge arresters can be installed on pole-mounted distribution systems to protect feeders and connected equipment against lightning and switching overvoltages.
Surge arresters are commonly installed close to distribution or substation transformers to limit overvoltage stress on transformer insulation.
Metal oxide surge arresters can be used at transformer bays, incoming lines, cable terminations and other positions where insulation coordination requires overvoltage protection.
Higher-voltage surge arrester models can be selected for transmission and grid infrastructure projects according to system voltage, insulation level and project requirements.
Surge arresters may also be specified to protect cable terminations and other medium- or high-voltage equipment exposed to transient overvoltages.
ZheXi's metal-oxide surge arrester range is developed for power transmission and distribution applications and supports project requirements based on standards such as IEC 60099-4 and relevant customer specifications.
For tender projects, buyers can contact our engineering team to confirm the applicable model, technical datasheet, test documentation and project-specific requirements before ordering.
The metal-oxide surge arrester(MOSA)is the most advanced overvoltage protector in the word.Due to make the varistor of core com-ponent mainly adopt MOSA.Compared with the conventional silicone carbide arrester,this prescription of the product improves greatly the Voltage-Current(U-I)characteristic of the metal-oxide varistor and increased through-current capability at over-voltage so as to bring a radical-changes for the characteristic of the MOSA.Under the circumstance of normal operating voltage,the currentthrough the MOSA just on microampere degree.When suffered from overvoltage,the MOSA's excellent non-linear characteristic will make the current through the MOSA increase to several thousand ampere,While the MOSA will be under the circulating state and release overvoltage energy so as to protecting the power transmission equipments against the damage caused by the overvoltage.
a) Ambient air temperature within the range of-55℃ to +50℃。
b) Altitude not exceeding 2000m.
c) Frequency of the A.C.Powersupply not less than 48Hz and not exceeding 62Hz.
d) Power frequency voltage applied continuously between the terminals of the arrester not exceeding its continuous operating voltage.
e) Maximum wind speed not exceeding 35m/s.
f) Earthquake intensity not exceeding 7 degrees.
-Low residual voltage
-Long protection distance
-High energy input capacity
-Stable U-I characteristic even after multiple strokes
-Proof against ageing
-Explosion and shatter-resistant design
-Pollution resistantand UV-stable
-Housing resistant to rough handling
-Maintenance free
-Stable against shock and vibration
-High mechanical resistance
The technical performance of metal-oxide surge arrester is accord with IEC60099-4,IEEE(ANSI)C62.11 and Gb11032
ZheXi Electric Power specializes in the design, production and supply of equipment for overhead transmission and distribution systems.
Our surge arrester sourcing support focuses on engineering compatibility and project requirements rather than simply supplying a catalogue model.
● Polymer zinc oxide surge arrester product range
● Medium- and high-voltage options
● OEM/ODM project customization
● Technical selection support
● IEC-oriented testing and documentation support
● Type-test documentation available for applicable projects
● Support for international tender projects
● Surge arresters, insulators, fuse cutouts and line fittings available from one supplier
● Quality inspection and testing before shipment
● Export experience for international distribution and transmission projects
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Application
Our company's products are sold well in North America, Latin America, Southeast Asia, Africa, the Middle East, etc., and we have established long-term and stable cooperative relations with many international customers.
