POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD Lead Free 500W WATER COOLING NON-INDUCTIVE HIGH POWER RESISTORS RPH-500 Features and Applications Small size 500W water-cooled non-inductive resistor with very low resistor temperature under operation. Flat plate resistance and twisted pair leads and special terminal structure (patent) have shown excellent surge absorption performance. Resistors are insulated from case by high purity alumina substrate, and are guaranteed voltage-proof to 5kV. Leads type, length, terminal processing (patented), and hose connections can accept arbitrary demands. Surge suppression resistors for power thyristors and IGBT, used in power supply of electric power conversion systemｓ and of industrial apparatus, and high output AC motor controls. Dimensions (mm) 90.0 (40.0) (21.0) 30.0 φ12.7 50.0 30.0 32.5 Hose mouth: Nitta Moore Company DC10-PT3/8 φ10.0 15.0 30.0 70.0 2-M5 depth 6 Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected] POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD Lead Free 500W WATER COOLING NON-INDUCTIVE HIGH POWER RESISTORS RPH-500 Specifications and Performances Specifications Any Value (odd value will be under MOQ 100pcs) 0.1ohm-1Kohm +/-250ppm/ degree C +/-10% 40nH/dual resistor, (Typical) 160pF/dual resistor, (Typical) Standard: Nipple, any types are available. +41degreeC maximum at inlet, more than the dew point 2 litters/minutes minimum. 0.06Kg/(cm*cm) 1.4 degree C 14 degree C 50 degree C Maximum 110 degree C 500W (250W/resistor element） 700W (350W/resistor element) Peak Power 37KW/10microseconds/10KHz (Only for reference) 100KW peak power/70microsec and 37KW peak power/34microsec. Teflon Insulated Wire（0.18/30, outer diameter 2mm, Blue）, 200mm length. AC2000V, 60 seconds. (Between terminals and case) AC1000V 1000Mohmminimum. (Between terminals and case) +/-2% (Rating 500W, 1000 hours) +/-2%(Rating*0.1, 1000hours, continuous load) 350 grams Resistance Resistance Range TCR Tolerance Series Inductance Parallel Capacitance Hose Mouth Water Temperature Volume of Water Flow Water Pressure Loss Water Temperature Rise Case Temperature Rise Surface Temperature Rise Surface Temperature Rise Rating Power Max. Applied Power Continuous Impulse Load Damaged Impulse Load Terminal Codes Dielectric Strength Max Operating Voltage Insulation Resistance Load Life Humidity Weight Ordering Information RPH-500H10+10ohmKZ00 RPH-500H20ohmKZ00 RPH-500-999 Type TCR Resistance Tolerance Code RPH-500 +/-250ppm/K(H) 10ohm plus 10ohm independent +/-10%(K) Z00 RPH-500 +/-250ppm/K(H) 20 Ohms +/-10%(K) Z00 999: 3 numerical digits specified code from each specification draw, please call factory Temperature Rise Characteristics Resistor Surface Temperature Rise degrees C Case Temperature Rise Water Flow 1litter/min. 3 litter/min. 5 litter/min. 7 litter/min. 100 80 degrees C 20 60 15 40 10 20 5 0 0 250 500 750 1000 Applied Power(W) Water Flow 5 litter/min. 7 litter/min. 25 0 0 250 500 750 1000 Applied Power(W) 20050212 Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]