Product Group: Vishay Milwaukee, Resistors / June 2016 Author: Zak Paulus Tel: +1 414-434-1716 E-mail: [email protected] GRE1, GRE2, and NGR Grid Resistors Available With New Resistive Element Material for More Stable TCR Product Benefits: • • • • Stable TCR down to ± 365 ppm/°C Excellent corrosion resistance High power ratings up to 24 kW (GRE1 and GRE2) High-temperature performance to +760 °C (NGR) Market Applications: • • Ground fault, overvoltage, and short circuit protection for generators and transformers in wye (star) configurations Capacitor pre-charge and discharge, dynamic braking, load testing, heater, and neutral grounding applications in locomotives, harmonic filters, and renewable energy and industrial systems The News: Vishay Intertechnology announces that its Vishay Milwaukee GRE1, GRE2, and NGR grid resistors are now available with a new stainless steel resistive element material optimized for applications requiring a more stable TCR. • New magnetic element material provides superior performance for dynamic braking resistors, testing load banks, motor control, and other applications requiring a minimal change in resistance as the elements increase in temperature • Non-magnetic element material provides TCR of ± 930 ppm/°C, ideal for harmonic filtering and current limiting applications, in addition to those requiring reduced noise emissions, such as dynamic braking in elevators and other industrial equipment • Featuring a steel plate element, ceramic insulators, and multiple taps, the GRE1 and GRE2 provide high reliability with a welded construction and double insulation for maximum cooling efficiency • NGR devices feature GRE1 resistors mounted in a rugged, weatherproof IP23-rated enclosure Product Group: Vishay Milwaukee, Resistors / June 2016 The Key Specifications: • • • GRE1: • Power rating: 1.3 kW to 7.8 kW • Resistance Range: 0.02 Ω to 19.2 Ω GRE2: • Power rating: 4 kW to 24 kW • Resistance range: 0.04 Ω to 60 Ω NGR: • System voltage: 2.4 kV to 13.8 kV • Line-neutral voltage: 1.39 kV to 8 kV • Resistance range: 1.39 Ω to 80 Ω Availability: Production quantities of grid resistors with the new stainless steel resistive elements are available now, with lead times of three to four weeks. To access the product datasheets on the Vishay website, go to http://www.vishay.com/ppg?31833 (GRE1, GRE2) http://www.vishay.com/ppg?31873 (NGR) Global Contact: Zak Paulus [email protected]