Schedule a Call Back
Star Delta Starters, Oil Immersed
Star Delta Starters, Oil Immersed
Jyoti oil-immersed star delta starters up to 150 kW/200 HP at 415 V comply with IS: 8544. Advantages include: provide life time assurance, ensure fail-safe working in corrosive, dusty, fluffy, shaggy, moist, powdery atmosphere, use of oil media results in cool operation, continuous lubrication results in less wear and tear. The standard induction motor is run-up star connected at a reduced voltage. Its current intake and torque go down to one-third of those, which would be registered with direct online starting in delta connection. Once motor runs up to speed, the motor windings switch over into delta and motor goes into normal operation with its winding carrying full voltage. The change-over takes place close to rated speed. The current less interval is so short that it hardly causes a drop in motor speed. Standard features: push button operation for On-Off, operational range -20% to + 15% of rated coil voltage, suitable for intermittent duty class 0.1, starting time in star condition adjustable between 3 to 12 secs, under voltage protection below 40% of rated voltage, adequate space and staggered terminations for recommended conductors of either copper or aluminium, top or bottom entry for external connections, easy to install and maintain, enamel paint for weather resistance, and starter enclosures classified under IP-50. The star-delta starters have three contactor inserts, (main, delta and star), mounted on cast iron frame. The thermal overload relay is connected in phase circuit and mounted on contactor terminals. The thermal timer located on base plate is pre-set for desired changeover operation. The timings can be adjusted between 3 to 12 seconds. The contacts and magnet system are immersed in oil tank and terminals are covered.
