High Power, High Current EDG Mica Grid Resistors, Grid Mill Bank Design FEATURES assembly 8 kw at 40 C Superior watt density for higher powers in same space EDG technology support system improved for lighter weight, better heat transfer, and higher power Full range of standard mill bank ratings available Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 OVERVIEW resistor is a new product that offers improvements to the standard mill bank size GRE1 used in motor control applications. With significant improvements in power capacity, reduction in weight, and increased watt density, these standard banks can work great in load applications, braking applications, motor control, and testing applications as well. MOTOR CONTROL Many large wound rotor motors use resistors to step in and gently start the large drives. APPLICATIONS OF GRID RESISTORS Dynamic Braking When an electric motor driven load is being decelerated, the motor acts as a generator, converting kinetic energy of the load to electrical energy. The dynamic braking circuit converts this electrical energy into heat to slow the load, through the use of dynamic braking resistors. Braking resistors ensure proper motor operation, allow heavy loads to stop quickly and protect the drive from damage. Furthermore, dynamic braking resistors that are improperly cooled, incorrectly sized, physically damaged or electrically failed can cause costly unwanted down time. Load Banks Custom designed resistive load banks allow for load simulation of many electrical applications for testing purposes. STANDARD ELECTRICAL SPECIFICATIONS GLOBAL MODEL POWER RATING OF RESISTOR BANK W RESISTANCE RANGE TOLERANCE ± % TEMPERATURE COEFFICIENT ± ppm/ C 8000 0.067 to 24.273 10 365, 130 Revision: 26-Mar-18 1 Document Number: 31884
STANDARD MILL BANK DESIGNS GLOBAL MODEL RESISTANCE CURRENT A SCHEMATIC GLOBAL MODEL RESISTANCE CURRENT A SCHEMATIC LR0670K00N0000 0.067 345 4 L1R376K00N0000 1.38 76 3 LR0750K00N0000 0.075 325 4 L1R429K00N0000 1.43 75 3 LR0840K00N0000 0.084 310 4 L1R577K00N0000 1.58 71 2 LR0940K00N0000 0.094 290 4 L1R671K00N0000 1.7 70 3 L060K00N0000 0.106 275 4 L1R665K00N0000 1.67 70 2 L190K00N0000 0.119 260 4 L1R737K00N0000 1.74 68 3 L230K00N0000 0.123 255 4 L1R921K00N0000 1.92 64 3 L390K00N0000 0.139 240 4 L1R874K00N0000 1.87 65 2 L750K00N0000 0.175 215 4 L230K00N0000 2.23 60 2 L850K00N0000 0.185 208 4 L216K00N0000 2.12 62 3 L080K00N0000 0.208 195 4 L2R413K00N0000 2.41 58 1 L480K00N0000 0.248 180 4 L2R408K00N0000 2.41 58 3 L680K00N0000 0.268 175 3 L2R461K00N0000 2.46 57 2 L730K00N0000 0.273 170 4 L2R713K00N0000 2.71 54 1 LR3010K00N0000 0.301 163 3 L2R668K00N0000 2.67 55 2 L960K00N0000 0.296 165 4 L2R697K00N0000 2.70 54 3 LR3350K00N0000 0.335 155 3 L3R012K00N0000 3.01 52 1 LR3440K00N0000 0.344 155 4 L3R095K00N0000 3.10 51 2 LR3570K00N0000 0.357 150 4 L315K00N0000 3.22 50 2 LR3760K00N0000 0.376 145 3 L3R382K00N0000 3.38 49 1 LR4230K00N0000 0.423 138 3 L3R805K00N0000 3.81 46 1 LR4180K00N0000 0.418 138 4 L3R761K00N0000 3.76 46 2 LR4340K00N0000 0.434 135 4 L3R909K00N0000 3.91 45 2 LR4760K00N0000 0.476 130 3 L480K00N0000 4.28 43 1 LR4800K00N0000 0.480 129 4 L4R323K00N0000 4.32 43 2 LR4910K00N0000 0.491 128 3 L4R422K00N0000 4.42 43 1 LR5290K00N0000 0.529 123 4 L4R761K00N0000 4.76 41 2 LR5550K00N0000 0.555 120 3 L4R991K00N0000 4.99 40 1 LR6030K00N0000 0.603 115 2 L5R418K00N0000 5.42 38 2 LR6020K00N0000 0.602 115 4 L6R308K00N0000 6.31 36 1 LR6780K00N0000 0.678 108 2 L6R068K00N0000 6.07 36 2 LR7010K00N0000 0.701 107 3 L6R659K00N0000 6.66 35 1 LR6742K00N0000 0.674 108 4 L7R498K00N0000 7.50 33 1 LR7530K00N0000 0.753 103 2 L8R918K00N0000 8.92 30 1 LR7400K00N0000 0.740 104 3 L9R845K00N0000 9.85 29 1 LR8450K00N0000 0.845 97 2 L10R67K00N0000 10.673 27 1 LR8330K00N0000 0.833 98 3 L12R38K00N0000 12.382 25 1 LR9510K00N0000 0.951 92 2 L12R86K00N0000 12.860 25 1 LR9910K00N0000 0.991 90 3 L15R04K00N0000 15.043 23 1 L1R070K00N0000 1.07 87 2 L15R63K00N0000 15.636 23 1 L1R094K00N0000 1.09 85 3 L179K00N0000 17.291 22 1 L106K00N0000 1.11 85 2 L19R04K00N0000 19.044 20 1 L186K00N0000 1.19 82 3 L21R67K00N0000 21.671 19 1 L148K00N0000 1.25 80 2 L247K00N0000 24.273 18 1 Revision: 26-Mar-18 2 Document Number: 31884
www.vishay.com DIMENSIONS in millimeters (inches) RESISTORS BANK DIMENSIONS 159 ± 3.2 (6.26 ± 0.12) Front view Right side view 346 ± 3.2 (13.64 ±0.12) 673 ± 3.2 (26.50 ± 0.12) arrangement 1 arrangement 3 154 (6.08) Top Bottom 638 ± 3.2 (25.12 ± 0.12) Bottom view Top Bottom 159 ± 3.2 (6.26 ± 0.12) Front view 673 ± 3.2 (26.50 ± 0.12) Right side view 347 ± 3.2 (13.68 ± 0.12) arrangement 4 arrangement 2 347 ± 3.2 (13.68 ± 0.12) 154 (6.08) 638 ± 3.2 (25.12 ± 0.12) Bottom view Revision: 26-Mar-18 Document Number: 31884 3
TECHNICAL SPECIFICATIONS PARAMETER UNIT RESISTOR CHARACTERISTICS Power rating W 8K Resistance tolerance % 10 TCR ppm/ C ± 365, ± 130 Operating temperature C -55 to +415 Temperature rise C 375 above an ambient of 40 C Maximum altitude f.a.s.l. (m.a.s.l.) Derate above 4921 f.a.s.l. (1500 m.a.s.l.) Insulation resistance 1M Dielectric voltage V RMS 2500 for 60 s Creepage inch (mm) 0.5 (12.7) typical Inductance Electrical or mechanical customization μh : 6 to 140 (varies by resistance) Consult factory: vishaymilwaukeeresistor@vishay.com GLOBAL PART NUMBER INFORMATION Resistor only: L216K00N0000 ( 8000 W 2.116 10 % IP00) G R E M L 2 R 1 1 6 K 0 0 N 0 0 0 0 GLOBAL MODEL (5 digits) L RESISTANCE VALUE (5 digits) 216 = 2.116 R = decimal resistance value is for each individual resistor bank TOLERANCE (1 digit) K = ± 10 % Tolerance value is for each individual resistor bank ENCLOSURE TYPE (2 digits) IPxx = IP rating 00 = IP00 / NEMA 0 ENCLOSURE HEIGHT (1 digit) N = no enclosure (standard) SPECIAL (4 digits) 0000 = standard Engineering controlled internal document number DERATING CURVE RATED POWER IN % 120 100 80 60 40 20 0-20 40 100 160 220 280 340 415 460 AMBIENT TEMPERATURE IN C Revision: 26-Mar-18 4 Document Number: 31884
TEMPERATURE RISE OVER AMBIENT TEMPERATURE RISE IN C 500 400 300 200 100 0 0 8000 W, 0.106 Ω cont. duty 8000 W, 24.27 Ω cont. duty 8000 W, 0.106 Ω pulsed with 700 kj total 50 100 150 200 250 300 350 TIME IN s Standard Lxxxxx 8000 W grid banks are rated with max. design temperature rise of 375 C over an ambient. Continuous Duty Application With Constant Voltage Applied to Resistor Solid line - L247K00N0000 standard 8 000 W, 24.27 resistor bank Dotted line - L060K00N0000 standard 8 000 W, 0.106 resistor bank Graph shows the peak element temperature is reached between 100 s and 400 s depending on active mass of material used to achieve the desired resistance. Different rates of heating occur depending on the active mass used in the design. Pulse Application With Non-Constant Voltage Applied to Resistor Dashed line - L060K00N0000 standard 8 000 W, 0.106 resistor bank Graph shows the peak element temperature of about 450 C over ambient is reached with an average continuous duty temperature of 375 C over ambient when an energy pulse of 0.1 MJ is applied to the resistor for 5 s once every minute, cycled continuously. Average temperature at continuous cycling is 375 C (peaks above and below). MATERIAL SPECIFICATIONS EDG type element Insulators Mounting frame Stainless steel Mica Mill galvanized steel (stainless steel available upon request) Revision: 26-Mar-18 5 Document Number: 31884
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