Y. F series porcelain clad arrestersummaryThe arrester is the basis for insulation coordination of various electrical equipment (transformer, reactor, capacitor, engine, motor, PT, CT, circuit breaker, contactor, etc.) in the power system.
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1) It is used to protect electrical equipment from high transient over-voltage and limit the freewheeling time and the freewheeling amplitude.
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use environment a. The altitude does not exceed 1000 meters; b. The surrounding air environment has no conductive dust and no corrosive, flammable and explosive gases, etc.; c. Wind pressure does not exceed 100Pa (equivalent to wind speed 34m/S); d. The earthquake intensity does not exceed magnitude 8; e. The annual temperature difference ratio is within ±40°C.
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This unit has been specifically designed to meet the needs of contractors where the necessiiy or the ability to have a Cable Drum Trailer is simply not practical.Available with either a fixed spindle (shown), i.e. drum loaded by external means, or supplied self sufficient in lifting and lowering as used on standard Cable Drum Trailers in our range.The unit comes with a range of options to suit most applications for both the Utility and Rail industries.Diesel, Petrol, Electric or PTO Drum Drive system for ease of cable payout, unit can be pendant controlled.
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Due to electromagnetic induction, the metal shielding layer (or metal sheath) of long line high-voltage single core power cables generates induced voltage, which leads to aging of insulation and reduction of insulation grade, resulting in reduced cable life. Once the induced voltage exceeds the sheath breakdown voltage, the outer sheath is broken down, forming a multi-point grounding fault of single core cables.
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Very popular MW cooled detector in the world market. Can work with C308, C330 or C363 stirling cooler.
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Most advanced stirling cooler in the world. Very powerful cooling ability.
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Very popular MW cooled detector in the world market. Can work with C308, C330 or C363 stirling cooler.
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Most advanced stirling cooler in the world. Very powerful cooling ability.
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•Note:1,(DEBI Equivalent background illumination, measured after up to 2 minutes stabilization in the dark with the operational voltage applied.2,Signal to noise ratio : measured in the circle(diameter:0.2), equivalent system frequency.3,On the area of 1mm² .illumination flux 0.05lm,lasting 60 seconds .4,Measured for 0.3ms both parallel and perpendicular to the axis separately with power supply applied, totally for 6 times.
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Using the existing image intensifier technology, the antimony cesium photocathode UV image intensifier is successfully developed, with UV transparent quartz glass as the input window and double proximity focusing image intensifier. Solar blind UV imaging detection module is an imaging detection product for solar blind UV band based on UV image intensifier manufacturing technology, combined with optical design technology and electronic signal processing technology. It is mainly composed of solar blind UV coupling module, solar blind UV optical module and signal processing module.
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SpecificationsRated voltage kVCustomized mechanical tensile load KNconnection markStructure height H (mm)Minimum arc distance h (mm)Minimum nominal creepage distance h (mm)Lightning full-wave impulse withstand voltage (peak kV not less thanThe operating impulse withstand voltage (peak value) kV is not less thanPower frequency wet withstand voltage 1minkv (effective value) kV is not less thanFXBW4-10/40104011W340±1519040095-60FXBW4-10/70107016W360±1519049095-60FXBW4-10/1001010016W400±1519049095-60FXBW4-20/40204016W450±15280600170-75FXBW4-20/70207016W470±15280750170-75FXBW4-20/1002010016W500±152
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HT series reflective infrared collimator is used for the assembly, correction and detection of infrared optical products and optical parts. It has long focal length, large aperture and high precision. It is a necessary general equipment for the production and testing of infrared optical instruments.
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All of the Cable Trailers described below are equipped with braking and road lighting systems to conform to the relevant European type approval specifications and are designed to travel fully laden at road speeds indicated on all European highways. Our full range of highway cable drum trailers and trailer mounted winches can now be used within all European countries without the need for additional individual country inspectionsand approval.For safe and easy drum handling, all SEB Cable Drum Trailers are fitted with hydraulic hand pump operated Iift/lower systems as standard.
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Composite insulators are composed of three parts: insulating core rod, silicone rod rubber sheath and connecting fittings at both ends. Insulating mandrel is the abbreviation of epoxy resin fiberglass lead rod, it is the skeleton of composite insulator, it plays multiple functions such as supporting umbrella cover, inner insulation, connecting hardware at both ends, and bearing mechanical load, etc.
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normal use conditionsAmbient air temperature: upper limit +40°C lower limit -25°CAltitude below 2000mRelative humidity: the daily average value is not greater than 95%, the monthly average value is not greater than 90%The surrounding air should be free from obvious pollution such as corrosive or flammable gas, water vapor, etc. No frequent violent vibration
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