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GR24H-2001T Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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GR24H-2001T Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 3 page Tel : 82-32-817-4325 Resistors And Fax : 82-32-817-4329 Resistive Applications Website : http://www.raraohm.com Email : sg@raraohm.com NEUTRAL GROUNDING RESISTORS LOAD BANKS INTRODUCTION RARA Neutral Grounding Resistors are designed to provide added safety to industrial distribution systems by limiting ground fault current to reasonable levels. In a typical grounded three phase system, the NGR is connected directly to the earth ground. This can cause high ground fault current (typically 10,000 to 20,000 amps) and excessive damage to transformers, generators, motors, wiring, and associated equipment. Installing a RARA Neutral Grounding Resistor between neutral and ground limits fault current to safe levels while still allowing sufficient current flow to operate fault clearing relays - custom designed for your particular system - durable, all stainless steel resistor elements - elements are well insulated from ground for added safety - corrosion resistant enclosures - several stages of assembly depending on shipping needs Product Notes Our NGR elements fall into three categories: Strip, edge wound and wire wound types. The dimensions of these range from thicknesses of 0.6-2.5mm and widths from 4-100mm. The element type depends on the power of the NGR. Our enclosuresv have voltage ratings from 0.2KV to 72KV and meet IEEE32. We can manufacturer NGRs with IP ratings up to IP54 and NEMA ratings up to NEMA3S. Characteristics of Metal Resistive Elements - reliable electrical characteristics - resistor contact points are spot or argon-welded eliminating contact defects - high resistance to mechanical vibration - advanced cutting and trimming technology ensures low resistance tolerance - easy maintenance and verification Minimum Information Needed for Model Selection - voltage rating [KV/R3] - current rating [A] - time rating [sec.] - resistance [ohms] - indoor/outdoor - ambient environmental conditions |
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