RHEOSTATS. PRODUCT IS A REPLACEABLE UNIT USED WITHIN TELECOMMUNICATION POWER FEED EQUIPMENT. IT IS A LARGE RESISTOR THAT CAN BE VARIED UNDER MOTOR CONTROL, TO PROVIDE A VARIABLE LOAD TO THE POWER FEED EQUIPMENT. IT ACTS AS A DUMMY LOAD TO ENABLE THE EQUIPMENT TO BE TESTED OFF LINE. A MAXIMUM OF EIGHT DUMMY LOAD MOTORISED RHEOSTATS ARE FITTED DEPENDING ON THE TOTAL LOAD REQUIRED. EACH RHEOSTAT ASSEMBLY COMPRISES A 5-GANG RHEOSTAT DRIVEN BY A 50V DC MOTOR THROUGH A REDUCTION GEARBOX, THAT PROVIDES AN OUTPUT SHAFT SPEED OF 5 RPM. A HEXAGON-ENDED SPINDLE AT THE DRIVE END OF THE RHEOSTAT SPINDLE PROVIDES A MEANS OF LOCAL MANUAL ADJUSTMENT. THE MOTOR HAS A SPLIT FIELD WINDING TO ALLOW DRIVE IN EITHER DIRECTION. CAMS ON THE OUTPUT DRIVE SHAFT OF THE GEARBOX OPERATE SINGLE POLE CHANGEOVER SWITCHES. THE SWITCHES OPERATE AT THE LIMITS OF TRAVEL OF THE RHEOSTATS IN EITHER DIRECTION.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8533: ELECTRICAL RESISTORS (INCLUDING RHEOSTATS AND POTENTIOMETERS), OTHER THAN HEATING RESISTORS. GIR6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL: 853340 - OTHER VARIABLE RESISTORS, INCLUDING RHEOSTATS AND POTENTIOMETERS. CN CODE 85334090: OTHER THAN FOR A POWER HANDLING CAPACITY NOT EXCEEDING 20W. ALSO CLASSIFIED IN ACCORDANCE WITH:- HSEN NOTE (B) TO HEADING 8533