Lightning ArresterThe lightning arrester is the basis for
insulation coordination of various electrical equipment (such as
transformer, reactor, capacitor, generator, motor, PT, CT, circuit
breaker, contactor, etc.) in the power system. The internal and
external insulation indexes (short-time power frequency withstand
voltage, lightning impulse withstand voltage, operation impulse
withstand voltage, etc.) of all electrical equipment in the power
system are determined by the protection performance of the
lightning arrester.Purpose And Executive StandardThis product is
used in power generation, transmission, transformation, and
distribution systems of AC 220kV and below, and is used to limit
the amplitude of lightning and internal switching overvoltage of
the system to the specified level. It is the basic equipment for
insulation coordination of the entire system. At the same time,
this product cannot be used to limit resonance overvoltage, and
other methods are required for system harmonic elimination.The
model of this product is prepared in accordance with JB/T 8459-2006
Preparation Method of Arrester Product Model and gapless products
shall comply with GB 11032-2000 AC Gapless Metal Oxide Arrester;The
products with gaps shall comply with the standard of Metal Oxide
Surge Arresters with Series Gaps (J B/T 9672-2005). Important
parameters and configuration methods not clearly defined in the
above standards shall be corrected according to the requirements of
DL/T 620-1997 Overvoltage Protection and Insulation Coordination
for AC Electrical Installations.The normal use conditions of
conventional products are as followsAmbient temperature: no higher
than+40 ºC, no lower than - 40 ºC; Altitude: no more than 3000
m;Power frequency: 50 ± 2Hz; 60±2Hz; Maximum wind speed:
35m/s;Cleaning-free conditions: areas with medium pollution and
below;For gapless products, the power frequency voltage applied for
a long time shall not exceed the continuous operation voltage of
the arrester; For products with gaps, the short-time power
frequency voltage rise at the installation point shall not exceed
the rated voltage of the arrester.If the arrester is used for a
long time under the following abnormal conditions, it shall be
specially made, and it shall be stated when ordering:The
temperature or altitude exceeds the standard (such as plateau,
tropical zone, cold zone, fully enclosed cabinet, close to an
electric furnace, etc.); The use environment has serious moisture
or corrosive gas impurities (such as water, salt fields, chemical
plants, etc.); Strong ultraviolet radiation (such as plateau,
drought area with strong sunshine, etc.);Extremely polluted areas
(such as mine working face, construction site working face,
etcModel And MeaningOutline And Installation DImensionPhotos of
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