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 GRE2 High-Power, High-Current Grid Resistors KEY BENEFITS • • • • • • Resistance range: 0.25 Ω to 50 Ω Low inductance: 10 µH to 40 µH Drop-in replacement for competitive products Modular design Power rating from 4 000 W to 24 000 W IP20- and IP23-rated enclosures available to hold 1-, 2-, or 3-resistor banks. See datasheet for details and dimensions APPLICATIONS • • • • • Industrial Locomotives Renewable energy Harmonic filtering Neutral grounding RESOURCES • Datasheet for GRE1/GRE2: http://www.vishay.com/doc?31833 • For technical questions contact [email protected] A WORLD OF SOLUTIONS Product Sheet 1/2 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 VMN-PT0451-1510 www.vishay.com 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 GRE2 OVERVIEW High-Power, High-Current Grid Resistors Vishay Milwaukee Resistor, a division of Vishay Dale Electronics, offers a complete line of custom and standard grid resistors (GRE1, GRE2), also know as steel grid, punched grid, and plate resistors. With a robust all-welded construction, Vishay Milwaukee Resistor grid resistors are designed using stainless steel resistance elements to repeatedly absorb high-energy pulses. 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 compromised can cause costly and unwanted down time. Harmonic Filters Within a harmonic filter installation, the filter resistors are used to dissipate unwanted harmonic frequencies as heat. Load Banks Custom-designed resistive load banks allow for load simulation of many electrical applications for testing purposes. CONTACT THE FACTORY FOR CUSTOM DESIGNS, AND OPTIONS FOR STANDARD DESIGNS Options include: custom mounting configurations, custom IP-rated enclosures, element size / shape, power, multiple resistors in a single enclosure, etc. For custom designs please include: duty cycle, total power, resistance, and mounting requirements. GLOBAL PART NUMBER POWER RATING (W) MIN. RESISTANCE (Ω) MAX. RESISTANCE (Ω) TOLERANCE (%) TEMPERATURE COEFFICIENT (PPM/°C) GRE2AxxxxxK00N0000 4000 0.04 10 10 ± 930 GRE2BxxxxxK00N0000 6000 0.06 15 10 ± 930 GRE2CxxxxxK00N0000 8000 0.08 20 10 ± 930 GRE2DxxxxxK00N0000 10 000 0.1 25 10 ± 930 GRE2ExxxxxK00N0000 12 000 0.12 30 10 ± 930 GRE2FxxxxxK00N0000 14 000 0.14 35 10 ± 930 GRE2GxxxxxK00N0000 16 000 0.16 40 10 ± 930 GRE2HxxxxxK00N0000 18 000 0.1 45 10 ± 930 GRE2JxxxxxK00N0000 20 000 0.2 50 10 ± 930 GRE2KxxxxxK00N0000 22 000 0.22 55 10 ± 930 GRE2LxxxxxK00N0000 24 000 0.24 60 10 ± 930 GLOBAL MODEL RESISTANCE VALUE TOLERANCE ENCLOSURE TYPE ENCLOSURE HEIGHT SPECIAL 5 digits 5 digits 1 digit 2 digits 1 digit 4 digits GRE2A to GRE2L per electrical table above 2R128 = 2.128 Ω K = 10 % (standard) 00 = IP00 / NEMA 0 (standard) N = No enclosure (standard) Allowable range R - Decimal resistance value is for each individual resistor bank Tolerance value is for each individual resistor bank IP = IP rating 00 = IP00 / NEMA 0 (open) 20 = IP20 / NEMA 1 (screen) 23 = IP23 / NEMA 3 (outdoor) GRE2 options 1 = 1 resistor bank high 2 = 2 resistor banks high 3 = 3 resistor banks high Assumes all resistor banks to be identical, per the first 11 digits of the part number, and all resistors will be customer wired as required. 00000 to ZZZZZ alphanumeric engineering controlled internal document number Product Sheet 2/2 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 VMN-PT0451-1510 www.vishay.com