V I S H AY I N T E R T E C H N O L O G Y, I N C . GRID RESISTORS NGR Reliable Neutral Grounding Resistors (NGR), High-Current Grid Resistors KEY BENEFITS • Neutral ground resistors offer line-neutral voltage to 8 kV and operating temperatures to +760 °C • Tied live design ensures there are no floating voltages in the assembly • Rugged, shock-resistant, IP23-rated enclosures available for environmental protection • Lifting eyes allow safe and easy installation • Stainless steel resistive elements • High-thermal-capacity to absorb high currents • Can be designed for specific applications APPLICATIONS • Industrial power systems • Transformers • Generators RESOURCES • Datasheet: NGR - www.vishay.com/doc?31873 • For technical questions contact [email protected] • Material categorization: For definitions please see www.vishay.com/doc?99912 One of the World’s Largest Manufacturers of Discrete Semiconductors and Passive Components PRODUCT SHEET 1/2 VMN-PT0441-1412 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 FEATURES • Tied live design V I S H so AYthat I Nthere T E Rare T E no C Hfloating N O L O G Y, I N C . voltages in the assembly NGR GRID RESISTORS • Rugged shock resistant IP23 rated enclosures available environmental protection www.vishay.com • Lifting eyes allow safe and easy installation Vishay Milwaukee NGR • Stainless steel resistive elements • High thermal capacity toy absorb high currents DIMENSIONS NGR • Can be designed for specific applications Reliable Neutral Grounding Resistors, • Custom design on demand www.vishay.com of compliance • Material categorization: definitions Milwaukee High-Current Grid Resistors for Vishay please see www.vishay.com/doc?99912 Reliable Neutral Grounding Resistors, High Current Grid Resistors APPLICATIONS OF NEUTRAL GROUNDING (NEUTRAL EARTHING) FEATURES C Vishay Milwaukee offers a complete line of custom and standard •neutral grounding (NGRs), Tied live design resistors so that there arealso no known floatingas neutral earthing resistors (NERs). Vishay Milwaukee devices are designed to absorb a large amount of energy without voltages in the assembly exceeding temperature limitations as defined in IEEE-32. These resistors are used for the grounding of generators and • Rugged shock resistant IP23 rated enclosures transformers in wye configurations for ground fault, overvoltage, and short circuit protection. available environmental protection • Lifting eyes allow safe and easy installation CONTACT THE FACTORY FOR CUSTOM DESIGN AND OPTIONS FOR STANDARD DESIGNS • Stainless steel resistive elements Options include: current transformers, enclosure style and entrance location, enclosure stands, disconnects, bushings, etc. • High thermal capacity toy absorb high currents For custom designs please include: system voltage, line-neutral voltage, max. on-time, current Brating. A • Can be designed for specific applications Right side view • Custom design on demand Front view STANDARD ELECTRICAL SPECIFICATIONS Note • Material categorization: for definitions of compliance • See “Standard Product Ratings” table for product specific dimensions LINE-NEUTRAL RESISTANCE please see www.vishay.com/doc?99912 SYSTEM VOLTAGE CURRENT TOLERANCE MODEL VOLTAGE VALUE ±% (kV) (A) TECHNICAL SPECIFICATIONS (kV) PARAMETER UNIT RESISTOR CHARACTERISTICS NGR1390 2.4 1.39 (NEUTRAL100 to 1000 1.39 to 13.9 10 APPLICATIONS OF NEUTRAL GROUNDING EARTHING) Resistance tolerance % 10 NGR2400 4.16 2.4and standard neutral 100 to 1000 2.40 to (NGRs), 24.00 Vishay Milwaukee offers a complete line of custom grounding resistors also known10as Operating temperature °C -55 to +760 neutral earthing resistors (NERs). Vishay Milwaukee devices are designed to absorb a large amount of energy without NGR4160 working voltage 7.20 4.16 100 to 1000 to 41.60 10 Maximum 600 V to 15 kV4.16 (product dependent) exceeding temperature limitations as defined in IEEE-32. These resistors are used for the grounding of generators and NGR7200 in wye configurations 12.47 7.2overvoltage, and 100 to 1000 7.2 to 72 10 transformers for ground fault, short circuit protection. MATERIAL SPECIFICATIONS NGR7620 Resistive element CONTACT THE NGR8000 Element insulators 13.2 7.62 100 to 1000 13.8 8 100 to 1000 7.6 to 76 Stainless steel 8 to 80 Ceramic 10 FACTORY FOR CUSTOM DESIGN AND OPTIONS FOR STANDARD DESIGNS 10 Options include: current transformers, enclosure style and entrance location, enclosure stands, disconnects, bushings, etc. Enclosure Steel (stainless steel upon request) Note rating. For custom designs please include: system voltage, line-neutral voltage, max. on-time, current High voltage insulation Porclein rise of 760 °C. • Per IEEE-32, standard NGRs are designed for a maximum on-time of 10 s and a maximum temperature GLOBAL PART NUMBER INFORMATION STANDARD ELECTRICAL SPECIFICATIONS CONTACT INFORMATION Global Part Numbering example: NGR8000K1000BZZZZZ (NGR-ZZZZZ 8000 V 1000 A 10 % B) MODEL N G R Revision: 02-Oct-14 NGR1390 LINE-NEUTRAL RESISTANCE SYSTEM VOLTAGE CURRENT VOLTAGE VALUE For design assistance, contact: [email protected] or +1-888-616-6666 (kV) (A) Z 8 0 0 0 K 1 0 0 0 B Z (kV) 2.4 1.39 100 to 1000 1.39 to 13.9 TOLERANCE ±Z % Z Z 10 NGR2400 4.16 2.4 100 to 1000 2.40 to 24.00 10 MODEL VALUE TOLERANCE SIZE PACKAGING SPECIAL (3 digits) (4 digits) 7.20 (1 digit) (4 digit) (1 digit) (5 digits) NGR4160 4.16 100 to 1000 4.16 to 41.60 10 NGR 1390 = 1390 V line-neutral K = ± 10 % 0400 = 400 A B = bulk Allowable range 00000 to NGR7200 2400 = 2400 V line-neutral 12.47 7.2 100 toA1000 to 72 10 1000 = 1000 D = wood 7.2 crated ZZZZZ 4160 = 4160 V line-neutral K = standard for all R = international, heavy alphanumeric NGR7620 13.2 7.62 100 to 1000 7.6 to 76 10 7200 = 7200 V line-neutral types and values duty and plastic skids 7620 = 7620 V line-neutral Engineering controlled NGR8000 13.8 8 100 to 1000 8 to 80 10 8000 = 8000 V line-neutral B = standard for all types internal document number Revision: 02-Oct-14 Document Number: 31873 1 and values For technical questions, contact: [email protected] Note DOCUMENT SUBJECT TO CHANGE WITHOUTon-time NOTICE. DESCRIBED HEREIN AND • PerTHIS IEEE-32, standardISNGRs are designed for a maximum ofTHE 10 s PRODUCTS and a maximum temperature rise of 760THIS °C. DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 CONTACT INFORMATION For design assistance, contact: [email protected] or +1-888-616-6666 Revision: 02-Oct-14 Document Number: 31873 3 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. PRODUCT SHEET 2/2 THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT VMN-PT0441-1412 ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Revision: 02-Oct-14 Document Number: 31873 1 For technical questions, contact: [email protected]