1. OVERVIEWSurge arresters are the foundation for insulating
various electrical equipment (transformers, reactors, capacitors,
generators, motors, PTs, CTs, circuit breakers, contactors, and all
other medium and high voltage electrical equipment) in power
systems. The protective performance of surge arresters determines
the insulation indicators (such as short-time power frequency
withstand voltage, lightning impulse withstand voltage, and
operating impulse withstand voltage) of all electrical equipment in
the power system. Metal oxide surge arresters (referred to as MOA)
are the most advanced products among conventional surge arresters.
The core working component is made of multi-metal oxide powder,
mainly zinc oxide, which is sintered to have excellent nonlinear
volt-ampere characteristics, fast response to steep waves, and high
current carrying capacity.2. PURPOSE AND USAGEMOA products are used
in AC power generation, transmission, transformation, and
distribution systems with voltages up to 220kv. They are used to
limit the amplitude of lightning and internally generated
overvoltages to the specified level, serving as essential equipment
for the insulation coordination of the entire system. However, this
product cannot be used to limit resonance overvoltages, as other
methods are required for system detuning. MOA products is
designed to protect the insulation of AC power transmission and
transformation equipment from lightning overvoltage and operational
overvoltage damage. Applicable to transformers, transmission lines,
distribution panels, switchgear, power measurement boxes, vacuum
switches, shunt compensation capacitors, rotating motors and
semiconductor devices, etc. Overvoltage protection.3. GENERAL
WORKING CONDITIONSAmbient temperature: not higher than +40ºC, not
lower than -40ºC;Altitude: not exceeding 2000m; Power frequency:
50±2Hz; 60±2Hz;Seismic intensity: 7 degrees and below;Maximum wind
speed: 35m/s;Maintenance-free conditions: moderate pollution and
below;Gapless products operate continuously at a power frequency
voltage not exceeding the continuous operating voltage of
MOA;Products with gaps are installed at a point where the power
frequency voltage does not exceed the rated voltage of MOA.4.
INSTALLATION METHODBefore installation, verify that the model of
the MOA product matches the intended usage location and clean the
surface of the product. For MOA products with a rated voltage below
25KV, they should be vertically fixed on the outer casing or
dedicated bracket of the protected equipment. Use a multi-strand
flexible wire with a cross-sectional area of not less than 10mm² to
connect the terminal of the MOA to the phase line (busbar). Connect
the terminal of the MOA to the ground wire (grounding resistance
should not exceed 10Ω). For MOA products with a rated voltage of
42kV and below, use a multi-strand flexible wire with a
cross-sectional area of not less than 16mm² for connection. First,
fix the base on the pedestal, then vertically install the surge
arrester unit in sequence, and connect the wiring as mentioned
above. If a counter needs to be installed, it should be connected
in series with the low voltage of the MOA. If a disconnector needs
to be installed, it should be connected in series with the MOA. For
line-type surge arresters, they are of the suspension type, and the
installation should avoid the surge arrester bearing the line
tension. Other precautions should be negotiated between the
supplier and the buyer.
5. LEAD TIME:The
delivery time is usually determined by the type and quantity of the
product, typically ranging from 15 to 20 days.6. WHY CHOOSE US?1),
Innovation StrengthFenarro has a professional research and
development team consisting of over 30 technical engineers. The
production design incorporates advanced international technology
and is equipped with updated equipment systems. It follows the
highest international standards for experiments and has invested
over 30 million US dollars in research and development expenses.2),
Quality ControlFenarro has over 40 professional testing equipment,
5 production lines, and 2 measurement centers, with strict quality
control processes in place to ensure that our products meet
international certification requirements.3), Quantity and
ProductivityFenarro has six workshops and nearly 230 well-trained
employees, with the help of modern automated production lines, our
annual production capacity is 150,000 sets of equipment.4), Our
ServiceI). By promptly addressing customer inquiries and concerns,
we provide a quick response during the pre-sales period to secure
the orders and achieve success in the B2B realm.II). Our service is
synonymous with excellence throughout the production process. We
pride ourselves on our meticulous attention to detail, our team of
experienced professionals, effective communication, and unwavering
commitment to timeliness.III). Our team of expert
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