Basic Info.
Resistance
Fixed Resistor
Function for Resistance
Protective Resistor
Installation
DIP Resistor
Material
Wire-wound Resistor
Type
Humidity Sensitive Resistor
Specification
export standard
Product Description
With neutral grounding resistance is installed, when nonmetal grounding, the current flowing through grounding point and neutral would be much less than that when metal grounding. Meanwhile sound phase voltage rise is lowered a lot and zero-sequence voltage is half of that when single-phase metal grounding. Therefore, adopting neutral grounding via resistance could decrease transient overvoltage when single-phase grounding, and eliminate arc flash hazards like transient overvoltage and some resonant overvoltage, and moreover it could adopt simple relays to quickly locate the fault line and clear it up.
Mingrui has outstanding technical researching team and superior equipments, specially concentrate on research & development, production, sales and service of neutral grounding series products of power distribution system. The transformer neutral earthing resistor we developed and produced is applicable to 6~35KV power distribution grid of cable lines in cities, large industrial enterprises, factories, airports, seaports, subway and etc. As well as 0.66KV system in mine digging and 0.4kv/6kv/10kv system in power plants.
1. Adopted high quality importe stainless steel or domestic stainless steel electric heating metal material, the product operates safely and reliably with the advantages of high conductivity, high temperature coefficient, corrosion resistance, thermostability, good oxidation resistance, high tensile strength, resistance value stability and etc.
2. The device also could be applied in medium power distribution system. When transfomer is angle-connected, independent grounding transformer could be installed with which the neutral point and resistance are connected
3. Resistance value could be designed from 1ohm to 2000ohm and current from 1A to 2000A
4. The cabinet could be installed indoor or outdoor. As the cabinet body is corrosion-resistant and of high protection grade, made from stainless steel plate or painted cold rolled steel plate
5. The counting function could be added to the device, which records times of resistance grounding
6. Isolated switch could be added which convenient examination and repair and so does temp. Or humidity controller
7. Intelligent monitor is at customers' option, which could monitor un-balanced current of neutral point when resistance cabinet is in normal operation, temp. Of resistance panel, and
Operation Environment
1. Applies to indoors.
2. Ambient temperature: Between -40 and +40 centigrade.
3. The altitude shall not exceed 3000m.
4. Relative humidity be or lower than 95%(25 centigrade)
5. Power grid frequency: 58-62Hz (60Hz System), 48-52Hz (50Hz System)
6. The air at the installation site shall be free from chemical corrosion, vapour or explosive dust.
Product Model and Description if Formation
Address:
No. 118 West Fuxing Road, Baoding, Hebei, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics
Management System Certification:
BS 25999-2, OHSAS/ OHSMS 18001, SA 8000, EICC, HSE, ISO 14000, ISO 14001, ISO 14064, ISO 20000, ISO 9000, ISO 9001
Company Introduction:
Baoding Mingrui Optoelectronics Technology Co., Ltd. is located in the High and New Technology Industrial Zone with more than 7 years of experience in electrical field. Our company has two business entities (Light Energy Company and Electric Power Company). Light Energy Company is specially engaged in the study of solar power generation and LED lighting. Electric Power Company is a high and new technology enterprise that is engaged in the research, production, sale and service of power system automation equipment. The long-term and close cooperation between our company and Beijing University and University Of North China Electric Power has formed a strong high-tech talent system. Our company also traces national and foreign electric technology development trends, develops new products, and is devoted to power automation product technology to make progresses.