Normal 0 false false false EN-US X-NONE HI /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; mso-bidi-font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Mangal; mso-bidi-theme-font:minor-bidi;} The range of PIONEER liquid rheostats type LRS is designed for controlling of large KW slipring motors and extends upto 5,000 kW or any higher rating required. PIONEER type LRS rheostats unique design, with horizontal movement of the moving contact system, enable a wide variation of the resistance. This coupled with current sensing relay which synchronises the change of resistance to the motor acceleration, ensures smooth progressive acceleration of the drive. With the use of Computer Aided System Engineering (CASE), wide range of specific requirements can be created to including twin drive rheostats for large drives and speed variation by control slip. PIONEER type LRS rheostats incorporate: - Tank for electrolyte available in discrete frame sizes, according to KW rating, - Horizontal movement contact system, and - Control panel All mounted on a common frame.CONSTRUCTION: Electrolyte Tank:Rheostat System: Polyproplene barriers: Control System: The control system is housed in a control panel constructed out of sheet and having ingress protection IP53/54. The pilot motor drive of the moving contact system control by forward-reverse starter. An electronic current relay senses the drive motors stator current and synchronises the displacement of the moving contact system and hence the resistance of the moving contact system and hence the resistance variation to the acceleration of the motor. A supervisory timer is provided to switch off the main motor in case the starting time is abnormally prolonged. Low level indication and interlock with main motor starting are also provided. Optional control equipment can also be incorporated on request. Fitted as Standard: Automatic / manual operationLevel monitoringRmax and Rmin monitoringFrequency converter for precise setting of acceleration timeHand crankGearbox with limit switchesShort-circuit contractorThermostat for cut-off and controlLiquid starters compliant with IP54Control panel at least compliant with IP54 Options: Circulation pumpIntegrated cooling system / Heat exchanger
