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Denetlenen Tedarikçi Why Use a Neutral Grounding Resistor in the power supply system?
First, let us introduce what is a neutral grounding resistor and the function of it.
A neutral grounding resistor is composed of enclosure, resistors, disconnecting switch, CT, heater, lightning arrester, etc. The primary purpose of a Neutral Grounding Resistor (NGR) is to limit the fault current already present in a single line to ground fault. That is why NGRs are mostly employed in low and medium voltage (LV and MV) distribution networks to ensure generators and transformers remain protected from damaging currents in the event of an earth fault.
Fullde Electric has own R&D team and factory to produce various NGRs for customers.
| Item | Unit | Value |
| System Voltage | kV | 3.3, 4.16, 6.3, 6.6, 10.5, 11, 24, 33, 35, customer specified |
| Rated Voltage | kV | 3.3, 4.16, 6.3, 6.6, 10.5, 11, 24, 33, 35 /√3 |
| Rated Frequency | Hz | 50 / 60 |
| Short-time Current | A | 50, 100, 200, 300, 500, 800, 1000, 1300, 1600, etc |
| Duration of Fault Current | s | 10, 30, etc |
| Short-time Current Temperature Rise | K | 700, 760 |
| Resistance Value ( 25 ºC) | Ω | 12, 15, 18, 40, 44, 110, etc ± 5% |
| Resistance Element Material | Stainless steel 304 | |
| Resistivity | μ . Ω .m | 0.73 |
| Temperature Coefficient of Resistor | Ω / ºC | 1.05 × 10 -3 |
| Melting point of resistance material | °C | 1350~1500 |
| Power frequency withstand voltage ( 1min ) | kV | as per design |
| Lightning impulse withstand voltage | kV | as per design |
| Ingress Protection | Outdoor, Max. IP44 with canopy; Or Indoor, IP2X, with flat top |
|
| Cable Entry and Out | Incoming: bottom; Outgoing: bottom | |
| Enclosure color | Spray RAL7035 | |
| Enclosure type | Cold rolled steel plate | |
| Operating life | year | 20 |
| weight | kg | About 150(as per design) |
Packed with thin film, pearl cottom and finally wooden case to protect the products well during transportation.
Hunan Fullde Electric Co., Ltd., registered capital of 50 million yuan, 82,409 square meters of land has been put into production, the third phase building is under construction. Hunan Fullde Electric Co., Ltd. has advanced production equipment; our technical strength has been recognized by the industry, and has obtained the ISO quality management system certificate, ISO environmental system certificate, occupational health and safety system certificate. The products are widely used in aerospace, ship drive, rail transit, smart power grid, wind power generation, industrial frequency conversion, new energy vehicles and other core fields of national strategic emerging industries.
Guangdong Fullde Electronics Co., Ltd. is the parent company of Hunan Fullde Electric Co., LTD., located in Dongguan, Guangdong province and has an area of square meters factory, with complete production processes, and advanced production equipment and testing equipment, distributed in a number of service points across the country, can quickly respond to customer needs, and provide quality products.
As a leading R&D and manufacturing enterprise in the intelligent braking field, the company mainly produces and sells shore power supply, ship power drive system, UHV AC-DC filtering system, neutral grounding protection device and complete systems, flexible DC starting system, wind power low voltage crossing protection system, ship intelligent test load system, locomotive energy feedback system, rail transit locomotive braking system, and other types of new intelligent braking systems. The products are widely used in ship drive, frequency conversion power supply, rail transit, aerospace, data center, smart power grid, wind power generation, industrial frequency conversion, new energy vehicles and other core fields of national strategic emerging industries. Now it has become a strategic supplier of Jiangnan Shipyard, China Shipbuilding Industry, China Navy, State Grid, China Southern Power Grid, CRRC, GE, Siemens, Hitachi and so on.
1. Own R&D team to design as per requirement.
2. Own production line to produce the enclosure, grid type resistors, which can control the quality,
3. Have rich experience in industries of data centers, gensets manufacturers, power transmission, etc.
1.What are your main products?
Load banks, NGR and all kinds of power resistors
2.Are you a manufacturer or trading company?
We are a manufacturer with our own production base and R&D center.
3.Where is your company?
HQ in Dongguan city,Guangdong province.Production base in Yiyang city,Hunan province. R&D in Zhuzhou city, Hunan province.
4.Where is your loading port?
Guangzhou Port, Shenzhen Port
5.What is your terms of delivery?
FOB/CIF/EXW
6.What about the lead time for production?
About 30-40 days
7.Are your products in stock?
Normally we don't have stock as they are all customized products.
8.Does your product have warranty service? How long is the warranty period?
Yes, we promise at least 12 months warranty.
9.What's your payment term?
T/T
10.If we have some other product requirements that your page don't include, can you help to supply?
Yes,ODM is welcome.we have a professinal R&D team,can provide all solutions for customers.
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