|
WCR500
WATER COOLED |
|
Download PDF File |
 |
HOME INTRO HISTORY PRODUCTS NEWS CATALOGUES ORDERING
|
WCR500
WATER COOLED |
|
Download PDF File |
|
INTRODUCTION
These are 500W & 1000W high power resistors exhibiting very low operating temperatures. These models
offer very low inductance and high surge handling capacity. They consist of a flat resistive element
with twisted air leads. A 5Kv dielectric strength is ensured with an alumina substrate. The low operating
temperature of the element gives a low failure rate in high-density, compact instruments and equipment.
These models can be used in snubber resistors, GTO and IGBT in electric power conversion systems.
SPECIFICATIONS AND CHARACTERISTICS Values in [ ] mean change in ohmic value after test
| Rated Power | WCR500: 500W (water cooling), WCR1000: 1000W (water cooling) |
| Resistance Range |
10, 20, 40 120 ohms |
| T.C.R | 250ppm/C |
| Resistance Tolerance | 10% |
| Dielectric Strength | 2000VAC, Between terminals and fin |
| Max. Water Pressure | 6kg/cm squared |
| Volume of water flow | 6 litres/min |
| Std. Water tamp. | 41C |
| Min. water temp. | Over dew point |
| Water temp. rise | 1.4C, At outlet (power rating) |
| Fin temp. rise | 14.0C, on the M5 tapping screw. (rated power) |
| Surface temp. rise | 50.0C, On the Heat sink surface Resistor surface temperature. (rated power) |
| Max. surf. Temp | 110C, On the element surface |
| Pressure loss | 0.06 kg/cm squared |
| Weight | 355g |
DIMENSIONS
 |
Surface Temperature Rise VS Power Rating & Load Life
  |
Surface Temperature Rise VS Power Rating & Load Life
 |
 |
Cooling Water Temperature Rise VS Power Rating
|
|
Copyright 1999-2005, RARA Electronics Corporation
