Submersible Starters are designed to meet the stringent requirements of both agricultural as well as domestic applications. The basic function of starters are isolation, motor control, protection against short circuit, single phasing & overloads. Havells starters address the customer needs to the fullest by incorporating the latest technologies in switching & protection accompanied with the best after sales service and an unparalleled network across India.
Range: Three Phase Direct On Line Starters (DOL) are available in ratings 5HP to 15HP and Three Phase Automatic Star Delta (ASD) Starters are available in ratings 5 HP to 25HP. Higher rating are made available on request.
Specifications: Conforms to IEC:60947-4-1 / IS 13947-4-1
Operating Principle: Direct On Line Submersible Starter
A DOL starter consists of contactor, overload relay, ON/OFF push buttons, housed in a sheet steel enclosure. It is meant for starting/stopping a motor and protects the motor against overload and single phasing condition.
Automatic Submersible Star Delta Starter:In the beginning the star & main contactors get switched ON and the pump runs in star position. After the preset star time, the auto changeover to delta takes place and thereafter the starter runs in delta position. Star delta starters help in meeting the starting current requirement during the star operation and the running current requirement during the delta operation of the submersible pump motor. The changeover from star to delta is achieved by means of an electronic timer which can be adjusted from 1 to 30 seconds as per the requirement of the motor. The Standard Model, offers protection against overload and single phasing, the Premium Model offers additional protection against short circuit besides overload and single phasing.
Features:
Reliability: Thermal bimetallic relay provides protection against overload and single phasing protection is offered by means of Single Phase Preventor.
Selectivity: Wide band operating Voltage 240V-415V AC (for use of Agricultural segment)
Robust Construction: Heavy Duty Contactor capable of working under severe conditions.
Easy to Check: Manual Trip Facility is provided to check the trip operation.
Flexible Design: Flexibility of onsite conversion between Automatic / Manual reset
Better Safety for motor and Operator: Provision of MCB gives better protection against short circuit on ASD Premium Model.
Repeat accuracy: Electronic Timer is provided to precisely control the changeover from Star to Delta. The changeover time can be set accurately from 1 to 30 seconds as per the motor requirement.
Added Safety from flash-over: A pause time has been provided between Star to Delta changeover to allow proper quenching of arc. The pause timing is available from 30 to 150ms.
Option for Extended Protection: In case of momentary interruption in power supply the water in the pipes flowing backwards into the ground. Sudden restoration of power supply during this period causes excessive load and may even result into burning of the motor. To prevent this, starters can be made available with the option of protection of a built-in on-delay in the SPP unit. Further, this delay can be provided optional as one minute or five minutes.
Starter is provided with two modes of operation through a door mounted selector switch as follows:
a.'Auto' mode with singhle-phasing preventor in circuit starts automatically
b.In 'Manual' mode the starter needs to be initialized manually through start button
Note: The on-delay in Single Phasing Preventor unit comes into effect only in auto mode.
