Drivloc is an Electronic device that can effect rapid or controlled braking of Single Phase and Three Phase A.C. Electric Motors. These motors provide the motive force behind the majority of todays machinery.

The Drivloc Operating Principle is simple, well proven and well established. When Direct Current (D.C.) Electricity is supplied (Injected) into a rotating Alternating Current (A.C.) motor, the result is a smooth, powerful, braking force.

The Drivloc is suitably connected to the Machine so that when Drivloc is actuated (via a number of possible methods), Drivloc disconnects the A.C. supply to the Motor and simultaneously replaces this supply with a precise D.C. Current Injection.

Once the Machine has come to rest, the Duration timer disconnects the D.C. supply to the Motor, the Motor then remains in a passive state until it is deliberately Re-Started.

Drivloc is able to fully utilise this simple scientific principle because with Drivloc, the D.C. 'Injection' can be very accurately controlled both in terms of Voltage (Braking Force) and Time (Braking Duration).

This means that Drivloc can be easily adjusted to suit the load to be stopped and that in applications where a rapid stop is not suitable, but perhaps a slightly slower controlled stop is preferable, the potential of the brake unit can be adjusted accordingly.

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Two 'standard' types of Drivloc are available. (Others can be supplied to special Order).

The manual S.M. range.

The manual S.M. range is the World's most popular safety type machine braking system. With this System, the equipped Machine Starts and Stops normally when it is being operated normally. However, in the event of a potential accident or problem occurring on the Machine, the trip switch is activated by the Machine Operator.
Drivloc then instantly cuts the A.C. supply to the motor and simultaneously injects an accurate amount of D.C. current to the motor to bring it rapidly to rest.

Once the Machine has come to rest, the Duration timer disconnects the D.C. supply to the Motor, the Motor then remains in a passive state until it is deliberately Re-Started.

The Drivloc unit must then be Manually reset by Pressing a button on the front of the enclosure, before the machine can be restarted. Thus preventing inadvertent restarting of the machine should an accident have occurred.

The Automatic P.M. range.

The Automatic P.M. range is suitable for many production applications as well as certain safety applications. Once installed, the Drivloc forms an integral part of the machines control system.

Whenever the machine stop button is pressed, the brake unit will be activated and bring the machine to a rapid stop. Once the Machine has come to rest, the Duration timer disconnects the D.C. supply to the Motor, the Motor then remains in a passive state.

The Drivloc unit then Automatically resets itself ready for the next Start/Stop Cycle.
Whenever the machine start button is pressed, the motor will immediately restart.
NO MANUAL RESET IS REQUIRED.

The P.M. Range is particularly suitable for machines with inherently long Run Down times which often cause Production hold ups or Safety Problems.

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The Standard Drivloc units are supplied complete, ready to be immediately and easily fitted to the Machine to be Stopped. The Drivloc Unit is housed in a compact painted steel enclosure rated to IP54. The enclosure is of equivalent size to that of an equivalent rating motor starter.

The Standard Drivloc units are available to suit either 415/440 Volt. Three Phase or 220/240 Volt Single Phase Motors. Other Voltages and configurations are available to Order.

Within the Drivloc enclosure are a minimum of Two Power Contactors, One contactor controls the A.C. supply to the motor(s) and the other(s) switch(es) on and off the D.C. Injection current to the motor(s).

There are two high quality Printed circuit modules to carry out the electronic control functions.