1 Contents>>> WFNGR Neutral Earthing Resistor…………………………………… FNGR series general neutral groungding resistor device… …… WFZJ series combined neutral grounding resistors device………6 Neutral grounding high resistor device…………………………… Generator neutral grounding resistor…………….…………….…… WFNGR Neutral Earthing Resistor Product Introduction Regarding the 6kV~35kV transmission and distribution systems which are mainly made up of cable wiring, we can adopt low resistance grounding mode in case of big capacitive current resulting from single phase grounding fault However, we should consider the requirement of power supply reliability, influence to electrical equipment resulting from the fault transient voltage and current, influence to communication, requirement of relay protection technology and local operating experience Program one: Program Two Environment Condition Indoor Outdoor Ambient Temperature -15℃～+40℃ -35℃～+45℃ Diurnal Range of Temperature ≤15K ≤25K Altitude ≤1000m(special condition can be designed and manufactured on request) ≤1000m(special condition can be designed and manufactured on request) Product Feature • Low level of system overvoltage: Low level of system overvoltage (less than 2.5Ue) when adopting resistor grounding mode • Fast failure isolation: Under feeder zero-sequence protection, the fault part will be isolated by tripping as soon as feeder failure occurs • Intelligent monitoring: With configurable intelligent controller, we can monitor the resistor temperature, current and earthing times • Infrared Temperature Measurement: We use infrared temperature non-contacting measurement to measure the resistor temperature, the primary and secondary equipment is completely isolated, so that the result will be sensitive and accurate The temperature change will make a response with in 1.5 seconds • High Insulation Level: Guaranteed by the best material used between resistor element like mica and ceramics, both the insulation level between resistor elements and resistor element -fixed element is high • High Tensile Strength: Each part of the resistor has a high intensity when adopting special and effective structure design Each components of the resistor are weld by argon arc, so the contact is good and reliable The resistor elements are fixed, which is fully considered • The Diversity of Operating Mode: There are many options when choosing the resistor operating mode, such as connecting the neutral point and the resistor directly, switching resistor, etc • Modular Design: Each type of resistor is made into a variety of components with standard specifications to achieve modular Through arbitrary combination of these components in series-parallel connection, not only can we easily satisfy your parameter requirement of through-current capacity, voltage and resistance, etc but also convenient for replacement • Full Product Series: From 6kV to 66kV, we can design and manufacture all types of earthing transformer (including earthing transformer with neutral point grounding directly), resistor, controller, both in dry-type and oil-type FNGR series general neutral groungding resistor device Categories * The low resistance grounding resistor for electric power distribution networks * The moderate resistance grounding resistor for electric power distribution networks * The high resistance grounding resistor for electric power distribution networks * The high resistance grounding resistor for generators Specification * Voltage: 0.4kV~110kV; * Rated current: optional; * Nominal resistance: optional; * Current duration: 10s,30s,60s,10min/continuous; * Incoming and outing line: top in bottom out, bottom in bottom out, side inside out, side in bottom out, etc; * Installation site: indoor/outdoor; * Allowable temperature rise: 760℃ for 10s,30s,60s and 610℃ for 10min and 385℃ for continuous; * Zero sequence current transformer: optional Tedhnical parameters of typical FNGR （kV） （kV ）Rated （A） （s）Current Ω（±10%） W*D*H mm kg Rated voltage of Rated current duration Nominal Dimension Weight voltage of resistor Type resistance value system FNGR6.3-100-10 6.3 3.64 100 10 36.4 1100×1300× 450 FNGR6.3-200-10 6.3 3.64 200 10 18.2 1800 500 FNGR6.3-400-10 6.4 3.64 400 10 9.09 500 FNGR6.3-600-10 6.3 3.64 600 10 6.06 500 FNGR6.3-1000-10 6.3 3.64 1000 10 3.64 500 FNGR10-100-10 10 5.77 100 10 57.7 500 FNGR10-200-10 10 5.77 200 10 28.9 550 FNGR10-400-10 10 5.77 400 10 14.4 550 FNGR10-600-10 10 5.77 600 10 9.62 550 FNGR10-1000-10 10 5.77 1000 10 5.77 FNGR10-600-10 10 5.77 600 10 9.62 (High type) 550 600 ×1000× 550 2200 FNGR20-400-10 20 11.5 400 10 28.9 1500×1600× 1250 FNGR20-600-10 20 11.5 600 10 19.2 2400 1250 FNGR35-200-10 35 20.2 200 10 101 3000×1650× 2000 FNGR35-400-10 35 20.2 400 10 50.5 2500 2000 FNGR35-600-10 35 20.2 600 10 33.7 2000 FNGR35-1000-10 35 20.2 1000 10 20.2 2000 FNGR35-1300-10 35 20.2 1300 10 15.5 3000×1650× 2500 FNGR35-2000-10 35 20.2 2000 10 10.1 3100 2500 Explanation: It can be supplied with DKSC series epoxy cast dry grounding transformer; Customer optional: whether to configure the zero-sequence current transformer; Customers are optional: whether to configure isolation switch; Special models can be customized according to customer requirements WFZJ series combined neutral grounding resistors device Innovative design WFZJW、WFZJN combined neutral grounding resistor devices are developed by ourselves, and we are the first company to manufacture in china Both the resistor elements and transformer are in one enclosure Resister elements are imported and the grounding transformer are manufactured in China, which has low loss、high withstand ability of short circuit surge。We can also supply zero sequence current transformer and disconnector according to customer’s requirement Obvious advantages Compacting in structure、saving site area、convenient to layout and installation, it’s specially suitable to reconstruct old substation and to build new power stations in the urban Customer acceptability The products gains more and more acceptability and recognition since WFZJ comes out Now it has been used in power system of Guangzhou、Shenzhen、Zhuhai、Shantou、Huizhou、Shunde、 Qingdao、Xiamen、Nanchang、Taiyuan etc According the operation experience for many years, it has proved that farad’s resistors are safe to system、reliable and worthy of using by customers Products’ specification * Rated voltage: optional; * Rated current: optional; * Arrangement: horizontal or vertical * Special design and manufacture requirements from customers can be satisfied Technical Parameters of Typical WFZJ combinatory NGR Serial Type No Rated Rated voltage of current（A） Grounding system (kV) Capacity of Resistance Dimension L×W×H Value（Ω） （mm） Transformer （kVA） WFZJ10-100-10 10 100 100 60 2230×1700×1800 WFZJ10-200-10 10 200 200 30 2230×1700×1800 WFZJ10-400-10 10 400 400 15 2230×1700×1800 WFZJ10-600-10 10 600 500 10 2230×1700×1800 Neutral grounding high resistor device Application Apply to the system where capacitance current is low, electric power network structure is not perfect, grounding fault lines is not required to trip out immediately when single phase ground fault occurs and to ensure reliability of important power load Primary functions * Limit system over-voltage by damping and energy dissipation of resistor; * Limit transient over-voltage within 2.5 p.u * Suppress resonance over-voltage; * Improve the insulation level of system equipments; * Limit signal phase fault current within 10 ~15A; * To alarm or trip optionally when fault line appears; * To ensure reliability for important load; * Improve the sensitivity of system grounding protection, making protection configuration more convenient Generator neutral grounding resistor 1.General: Neutral Grounding Resistors are used to protect power transformers, power generators and other associated equipment in your power systems against 50/60 Hz faults Standard : Neutral Grounding Resistors are designed, rated, manufactured and tested in strict c ompliance with IEEE-32,DL/T 780-2001 specifications: 4.Sales performance:Exported to India, Russia, France, Turkey, Malaysia etc more than 40 countr ies and cities 3.Characteristics The resistor is made from nichrome, which with high efficiency of electric conductivity, high-temperature endurance, melting point is higher as 1400°,small temperature coefficient, steady resistance value, corrosion resistance etc., We provide the products with the imported resistor material on the customer’s requirment Sealing features of cubicle: double ring seal cubicle door and the screw bolt fastening structure can enhance the protective performance of the cubicle with highest level of IPSS Different with the traditional grounding cubicle: we developed the special intellect controlled unit for the enclosure based on the market, which with the LED display and 32-digital single chip inside of it The cubicle can monitor the unbalanced current, the resistor plate, the grounding transformer and the enclosure temperature, it also can be tranfered into the controlling room and realize the unattended operation ...Contents>>> WFNGR Neutral Earthing Resistor…………………………………… FNGR series general neutral groungding resistor device… …… WFZJ series combined neutral grounding resistors device………6 Neutral grounding... all types of earthing transformer (including earthing transformer with neutral point grounding directly), resistor, controller, both in dry-type and oil-type FNGR series general neutral groungding... device………6 Neutral grounding high resistor device…………………………… Generator neutral grounding resistor…………….…………….…… WFNGR Neutral Earthing Resistor Product Introduction Regarding the 6kV~35kV transmission