GREMwww.vishay.com Vishay Milwaukee

Revision: 26-Mar-18 1 Document Number: 31884For technical questions, contact: vishaymilwaukeeresistor@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

High Power, High Current EDG Mica Grid Resistors, Grid Mill Bank Design

OVERVIEWVishay Milwaukee resistor GREM 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 CONTROLMany large wound rotor motors use resistors to step in and gently start the large drives.

FEATURES• GREM 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

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

GLOBALMODEL

POWER RATINGOF RESISTOR BANK

W

RESISTANCE RANGE

TOLERANCE± %

TEMPERATURE COEFFICIENT

± ppm/°C

GREM 8000 0.067 to 24.273 10 365, 130

GREMwww.vishay.com Vishay Milwaukee

Revision: 26-Mar-18 2 Document Number: 31884For technical questions, contact: vishaymilwaukeeresistor@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

STANDARD GREM “MILL BANK” DESIGNS

GLOBAL MODEL RESISTANCE

CURRENTA SCHEMATIC GLOBAL MODEL RESISTANCE

CURRENT

A SCHEMATIC

GREMLR0670K00N0000 0.067 345 4 GREML1R376K00N0000 1.38 76 3

GREMLR0750K00N0000 0.075 325 4 GREML1R429K00N0000 1.43 75 3

GREMLR0840K00N0000 0.084 310 4 GREML1R577K00N0000 1.58 71 2

GREMLR0940K00N0000 0.094 290 4 GREML1R671K00N0000 1.7 70 3

GREMLR1060K00N0000 0.106 275 4 GREML1R665K00N0000 1.67 70 2

GREMLR1190K00N0000 0.119 260 4 GREML1R737K00N0000 1.74 68 3

GREMLR1230K00N0000 0.123 255 4 GREML1R921K00N0000 1.92 64 3

GREMLR1390K00N0000 0.139 240 4 GREML1R874K00N0000 1.87 65 2

GREMLR1750K00N0000 0.175 215 4 GREML2R230K00N0000 2.23 60 2

GREMLR1850K00N0000 0.185 208 4 GREML2R116K00N0000 2.12 62 3

GREMLR2080K00N0000 0.208 195 4 GREML2R413K00N0000 2.41 58 1

GREMLR2480K00N0000 0.248 180 4 GREML2R408K00N0000 2.41 58 3

GREMLR2680K00N0000 0.268 175 3 GREML2R461K00N0000 2.46 57 2

GREMLR2730K00N0000 0.273 170 4 GREML2R713K00N0000 2.71 54 1

GREMLR3010K00N0000 0.301 163 3 GREML2R668K00N0000 2.67 55 2

GREMLR2960K00N0000 0.296 165 4 GREML2R697K00N0000 2.70 54 3

GREMLR3350K00N0000 0.335 155 3 GREML3R012K00N0000 3.01 52 1

GREMLR3440K00N0000 0.344 155 4 GREML3R095K00N0000 3.10 51 2

GREMLR3570K00N0000 0.357 150 4 GREML3R215K00N0000 3.22 50 2

GREMLR3760K00N0000 0.376 145 3 GREML3R382K00N0000 3.38 49 1

GREMLR4230K00N0000 0.423 138 3 GREML3R805K00N0000 3.81 46 1

GREMLR4180K00N0000 0.418 138 4 GREML3R761K00N0000 3.76 46 2

GREMLR4340K00N0000 0.434 135 4 GREML3R909K00N0000 3.91 45 2

GREMLR4760K00N0000 0.476 130 3 GREML4R280K00N0000 4.28 43 1

GREMLR4800K00N0000 0.480 129 4 GREML4R323K00N0000 4.32 43 2

GREMLR4910K00N0000 0.491 128 3 GREML4R422K00N0000 4.42 43 1

GREMLR5290K00N0000 0.529 123 4 GREML4R761K00N0000 4.76 41 2

GREMLR5550K00N0000 0.555 120 3 GREML4R991K00N0000 4.99 40 1

GREMLR6030K00N0000 0.603 115 2 GREML5R418K00N0000 5.42 38 2

GREMLR6020K00N0000 0.602 115 4 GREML6R308K00N0000 6.31 36 1

GREMLR6780K00N0000 0.678 108 2 GREML6R068K00N0000 6.07 36 2

GREMLR7010K00N0000 0.701 107 3 GREML6R659K00N0000 6.66 35 1

GREMLR6742K00N0000 0.674 108 4 GREML7R498K00N0000 7.50 33 1

GREMLR7530K00N0000 0.753 103 2 GREML8R918K00N0000 8.92 30 1

GREMLR7400K00N0000 0.740 104 3 GREML9R845K00N0000 9.85 29 1

GREMLR8450K00N0000 0.845 97 2 GREML10R67K00N0000 10.673 27 1

GREMLR8330K00N0000 0.833 98 3 GREML12R38K00N0000 12.382 25 1

GREMLR9510K00N0000 0.951 92 2 GREML12R86K00N0000 12.860 25 1

GREMLR9910K00N0000 0.991 90 3 GREML15R04K00N0000 15.043 23 1

GREML1R070K00N0000 1.07 87 2 GREML15R63K00N0000 15.636 23 1

GREML1R094K00N0000 1.09 85 3 GREML17R29K00N0000 17.291 22 1

GREML1R106K00N0000 1.11 85 2 GREML19R04K00N0000 19.044 20 1

GREML1R186K00N0000 1.19 82 3 GREML21R67K00N0000 21.671 19 1

GREML1R248K00N0000 1.25 80 2 GREML24R27K00N0000 24.273 18 1

GREMwww.vishay.com Vishay Milwaukee

Revision: 26-Mar-18 3 Document Number: 31884For technical questions, contact: vishaymilwaukeeresistor@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

DIMENSIONS in millimeters (inches)GREM RESISTORS BANK DIMENSIONS

673 ± 3.2(26.50 ± 0.12)

159 ± 3.2(6.26 ± 0.12)

R1

R2Front view346 ± 3.2

(13.64 ±0.12)

Right side view

R1

R2

154(6.08)

638 ± 3.2(25.12 ± 0.12)

Bottom view

R2

R1

Toprow

Bottomrow

R1 R2 R2R1

Schematicarrangement 3

Schematicarrangement 1

Toprow

Bottomrow

673 ± 3.2 (26.50 ± 0.12)

159 ± 3.2(6.26 ± 0.12)

Front view 347 ± 3.2(13.68 ± 0.12)

Right side view

347 ± 3.2(13.68 ± 0.12)

154(6.08)

638 ± 3.2(25.12 ± 0.12)

R1R2

Bottom view

R1 R2

Schematicarrangement 2

R1 R2

Schematicarrangement 4

GREMwww.vishay.com Vishay Milwaukee

Revision: 26-Mar-18 4 Document Number: 31884For technical questions, contact: vishaymilwaukeeresistor@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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 VRMS 2500 for 60 s

Creepage inch (mm) 0.5 (12.7) typical

Inductance μH GREM: 6 to 140(varies by resistance)

Electrical or mechanical customization Consult factory: vishaymilwaukeeresistor@vishay.com

GLOBAL PART NUMBER INFORMATIONResistor only: GREML2R116K00N0000 (GREM 8000 W 2.116 10 % IP00)

G R E M L 2 R 1 1 6 K 0 0 N 0 0 0 0

GLOBALMODEL(5 digits)

RESISTANCEVALUE

(5 digits)

TOLERANCE(1 digit)

ENCLOSURETYPE

(2 digits)

ENCLOSUREHEIGHT(1 digit)

SPECIAL(4 digits)

GREML 2R116 = 2.116

R = decimalresistance value isfor each individual

resistor bank

K = ± 10 %

Tolerance value isfor each individual

resistor bank

IPxx = IP rating

00 = IP00 / NEMA 0

N = no enclosure (standard)

0000 = standard

Engineering controlled internal document number

DERATING CURVE

AMBIENT TEMPERATURE IN °C

RA

TE

D P

OW

ER

IN %

120

0

100

80

60

40

20

-20 40 100 160 220 280 340 460415

GREMwww.vishay.com Vishay Milwaukee

Revision: 26-Mar-18 5 Document Number: 31884For technical questions, contact: vishaymilwaukeeresistor@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

TEMPERATURE RISE OVER AMBIENT

Standard GREMLxxxxx 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 ResistorSolid line - GREML24R27K00N0000 standard 8 000 W, 24.27 resistor bankDotted line - GREMLR1060K00N0000 standard 8 000 W, 0.106 resistor bankGraph 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 ResistorDashed line - GREMLR1060K00N0000 standard 8 000 W, 0.106 resistor bankGraph 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 Stainless steel

Insulators Mica

Mounting frame Mill galvanized steel (stainless steel available upon request)

0

TIME IN s

TE

MP

ER

AT

UR

E R

ISE

IN °

C 500

0

400

300

200

100

50 100 150 200 250 300 350

8000 W, 0.106 Ω cont. duty

8000 W, 0.106 Ω pulsed with 700 kJ total8000 W, 24.27 Ω cont. duty

Legal Disclaimer Noticewww.vishay.com Vishay

Revision: 01-Jan-2019 1 Document Number: 91000

Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product.

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.

Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein.

Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.

© 2019 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED