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the resistance boxes are used for heavy duty requirements of controlling the current in the circuit for various applications.
starting and speed control of ac slip ring motors with resistors is a universal method. The resistor is used to limit the inrush current and control the torque and speed characteristics of an ac slip ring motor.
by changing the resistance in the rotor circuit in various steps (thru a contactor), the starting torque and speed of the motor can be controlled to the desired value.
 
 
 
applications :

• eot cranes & winches
• rubber mills & floor mills
• coal mines & sugar mills
• steel plants & cement plants
• power plants & paper plants

Use in eot crane industries.

F21-E1B-For single-speed single-hook / hoist between the two directions

And 7 contact the following remote control of industrial use.

With 6 action buttons, including five single-speed buttons, a total stop Control up to 7 points

Warning devices with battery voltage, the voltage is less than its own circuit.

Security key switch to prevent unauthorized use.

Set by the computer interface to the internal functions

Up / down, east / west, can be set as to whether mutual inhibition.

Alternate 1 key can be set to start, acceleration, flick jump, ordinary functions.

Transmitter Power: DC 3V (2 alkaline AA batteries can be used 4 months)

Receiver Power Supply: AC 380V/220V selectable, or DC 12V/24V

Output contact capacity: 5 amp sealed relay output (AC 250V/10A relay, 5 amp fuse).

1 Speed, 6 Buttons+E Stop+Start

Control Distance: (200 Meter is custmised)

Temperature Range: -40 Degree C to 85 Degree C

Rotary Geared Limit Switch GRLS is used to trip motor supply when the moving load reaches the extreme end positions of working zone. The driving motion is transmitted by worm gear through worm shaft. The rotations and movements are transmitted to switches by adjustable cams.

Master Controller is housed in an enclosure and provided with an easily removable cover with ample area for maintenance. The cam shaft is mounted on bearing bushes on the walls of the housing.

They are made of delrin material and fixed on square spindle switch which are moved by a handle. The cams are cut according to the switching program.