Conventional Liquid Rotor Resistance Starter

It will be having MS Electrolyte tank, floor mounting, free standing type, dust & vermin proof construction. It will be provided Fixed & Moving electrodes made-out by MS Sheet Steel having horizontal movement, Anti-corrosive Epoxy black paint (inside the electrolyte tank walls), Phase barriers of polypropylene, Mechanism box, Power/Shorting Contactor/Cable Box and all other accessories for motorized as well as manually operation. Integral Control Box of suitable size (housed with main MS tank of LRS) will be provided & it having RDOL Starter of suitable rating Aux. contactor for reversing & forwarding Pilot motor & Moving electrodes, Over load relay, Key actuated Auto/Manual selector switch, Push button, Isolating switch, Indicating lamps, Power/Control TBs & necessary back-up protection etc. It will have Interlocking arrangement/circuit for Stator control panel, so that, Main motor can not be started unless resistance is in fully ‘IN’ Position. It will be provided AC3 duty Air Break Power contactor of ‘Reputed make’ (in delta connected) to suit the RA of motor for final short-circuiting the resistance when motor attains full speed. It will have provision for Manual operation, also.
POINTWISE TECHNICAL SPECIFICATION LIQUID ROTOR RESISTANCE STARTER :

• The Liquid Rotor Resistance Starter conforms to BS-140.
• It is totally Automatic Motor Operated and also, having Manual operation with the help of hand wheel.
• Electrolyte Tank will be made-out by MS sheet steel of 3mm to 5mm thick and other fabrication will be made-out by 2mm thick MS Sheet Steel.
• Epoxy Black Paint (for Anti-corrosion) will be done inside the Electrolyte Tank.
• Polypropylene Phase Barriers will be provided.
• Movement of Moving Electrodes will be Horizontal type.
• It is suitable for two consecutive starts from cold & four starts per hour equally spread in hot conditions.
• Limit Switches for Interlocking purpose with spares contacts will be provided.
• Moving & Fixed Electrodes will be made-out by MS Sheet Steel (zinc plated) of 3mm to 5mm thick.
• Electrolyte filling & over flow sockets will be provided.
• Air Break Power Contactor (AC3 duty) of ‘ABB/BCH/L&T make’ will be provided in delta connected to suit RA of motor for Final short-circuiting.
• Integral Control Box of suitable size (housed with the Main MS Tank of LRS) will be provided. It will have RDOL Starter having suitable rating Contactor for Forwarding & Reversing Pilot Motor & Moving Electrodes, Over Load Relay, Key Actuated Auto/Manual Selector Switch, Push button, Isolating Switch, Indicating Lamps & Power/Control TBs.
• Pilot Motor of ¼ HP Squirrel Cage type of reputed make will be provided.
• All the Switch-gear components will be of reputed make.
• It will be suitable for interfacing with consignee’s Stator Control Panel.
• Standard time of resistance cutting is depending upon the rating of motor. This time can be suitably changed to suit Main Motor.
• The Interlocking arrangement will be provided for Stator Control Panel. The Interlocking is such that the Main Motor can not be started unless Resistance is fully “IN” position & the Main Motor will be Tripped, if the Electrodes does not reaches to Run Position within specified time.
• Painting will be done by Hand Spray Gun M/cs with Light grey 631 of IS:5.
• Necessary cable glands and lugs can be provided at an extra cost.
• Electrolyte/Water level indicator & Temperature indicator cum controller with alarm & trip contacts will be provided at an extra cost.
• In the event of ordering all related drawing like GA, BOM & Schematic diagram etc. will be submitted for getting approval before start manufacturing work.& procuring of major Switch gear items of reputed make.