1. OVERVIEW Surge 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 USAGE MOA 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 CONDITIONS Ambient 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 METHOD Before 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 Strength Fenarro 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 Control Fenarro 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 Productivity Fenarro 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 Service I). 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 experts is dedicated to solving any issues that may arise after your purchase. We pride ourselves on our prompt and effective communication, ensuring that you are always kept in the loop and informed of any updates or progress. IV). The essence of our warranty program lies in its ability to instil confidence in our customers. By providing a long period quality warranty, we aim to eliminate any doubts that may arise during the decision-making process.
7. FAQ Q: Are you a factory or a trading company? A: We are a factory.
Q: How to place an order? A: Inquire with us → Customize with your design or sample → Inform us of your usage scenario → Receive our product design recommendation → Negotiate details → Confirm sample → Sign contract/deposit → Mass production → Goods ready for shipment → Delivery → Further cooperation.
Q: How about sample orders? A: We provide samples for reference, please contact us for details. Once we charge you for the sample fee, please rest assured that the fee will be refunded when you place a formal order.
Q: What shipping methods are available? A: We offer various shipping methods such as express, sea, air, and land transportation. If you need to specify other shipping methods, please contact us.
Q: How long does it take for delivery and shipment? A: Delivery time depends on the type and quantity of products you order. Usually, it takes 15-20 days.
Q: What can I do if some products are missing from my package? A: Please contact our support team, we will confirm your order contents with the packaging and compensate for the missing products according to the actual situation. We apologize for any inconvenience caused.
Q: How to confirm payment? A: We accept payment methods such as wire transfer and PayPal. Other payment methods are also acceptable, please contact us before making payment through other methods. Additionally, a 30% deposit is feasible, and the balance should be paid before shipment.
