Master controllers are used for the operation of contractor’s equipment controlling E.O.T. Cranes & Rolling mills drives. The controllers are made in a dust-proof enclosure in IP-54 degree of protection, up to 6 notches on either side with a maximum of 24 contacts as per the desired sequence with spring return arrangement & deadman’s handle arrangement are available. Master Controllers are compact up to 4-0-4 steps suitable for Grab-Hoist, CT-LT maximum contacts 16 per motion with spring return arrangement. They are of cam-type wherein contacts are actuated by individual cams mounted on the operating shaft. The master controller is housed in an enclosure and provided with an easily removable cover with ample area for maintenance. The camshaft is mounted on bearing bushes on the walls of the housing. The cams are made of Delrin material and fixed on a square.
Deadman’s control :
This consists of one auxiliary contact of two circuit blocks (1 NO+ 1 NC) operated through a spring-loaded push button provided on the joystick handle in case of operator loses the grip over the button during operation, the motion will come to stop as the main contractor will be de-energized.
Spring Return arrangement :
The master controller can be provided with a spring return arrangement whereby the handle returns to the neutral position when it is released.
Salient features :
- Body material – Aluminium / CI casting.
- The enclosure is of IP-44 / IP-55 degree of protection.
- The mounting position is Vertical.
- Cable entry is of 2×20 / 2×26 conduit
- The frequency of operation is 1000 switchings per hour.
- The rated voltage is 500 V.
- The thermal test current is 10 Amps.
- No. of contacts is 2 / 3 / 4
- No of the steps is 6 – 0 – 6 maximum
- Optional arrangement of Spring return / Deadman’s handle can be provided.
- The contact material is silver cadmium.
- All Material Handling and Lifting Equipments
- Hoisting: electric wire rope Hoists and Crabs
- Cross travel and Long travel: EOT / Gantry / Goliath / Derrick Cranes
- Winches and Conveyors
- Rolling mills
- Sugar, Mining, Cement, Textile industries to name a few.
- Brake motors.
THE INFINITY CORPORATION is one of the leading suppliers of Master controller and other crane products all over India.