Application
When selecting the application, the harder the application the larger the Soft Starter that is required.

Supply Voltage
This can be either: 230, 400, 480, 575 or 690 VAC.

Motor Size
AC Induction Motor Size is measured in Current, kW (@400V) or HP (@460V). The bigger the motor size, the larger the Soft Starter that is required.

Connection
Fairford Soft Starters can be run continuously or with an external bypass contactor which reduces heat and cabinet size. Note: Energy Saving (Optimising) requires continuous operation.

Fairfords XFE and QFE Soft Starters can be wired In Line or In The Delta. When the Soft Starter is wired In The Delta, a smaller unit can often be selected.

Ambient Temperature
The default ambient temperature around the starter is 40°C which requires no de-ration. For every degree above the 40°C the Soft Starter needs to be de rated by 2% of the Full Load Current.

Altitude
The Default height above sea level is 1000m. For every 100m above 1000m the Soft Starter needs to be de rated by 1% of the Full Load Current.

Application Definitions

Agitator
An agitator is a mechanism to put something into motion by shaking or stirring. Used in the water sector among other industries. Overload Class 10.

Air Compressor – Equalised
A compressor takes in a gas at a pressure and delivers it at a higher pressure. Equalised Compressors have the same pressure on both sides of the system so it is a fairly easy start. Used in many applications including air conditioners and heat pumps. Overload Class 5.

Air Compressor – Loaded
A compressor takes in a gas at a pressure and delivers it at a even higher pressure. Loaded Compressors have different pressures on both sides of the system so it is likely to be a fairly hard start. Used in many industries including air conditioners and heat pumps. Overload Class 10.

Ball Mill
A ball mill is a type of grinder used to grind materials into extremely fine powder for use in paints, pyrotechnics, ceramics and cement. Overload Class 20.

Centrifuge
A machine that rapidly spins liquids and separates out the particles by their density. Used in the food industry among others. Overload Class 30.

Chiller
A chiller is a machine that removes heat from a liquid via a vapour-compression or absorption refrigeration cycle. Overload Class 10A.

Conveyor – Lightly Loaded
A Mechanical device used to move materials between operations. Lightly Loaded items include bottles and food stuffs. Overload Class 5.

Conveyor – Heavily Loaded
A Mechanical device used to move materials between operations. Heavily Loaded items include Rocks and Concrete. Overload Class 20.

Crusher – Lightly Loaded
A machine that breaks rock or other items into smaller pieces by crushing it like a jaw or spinning it in a circular motion at high speeds. For example, lightly loaded crushers could be crushing clay. Overload Class 20.

Crusher – Heavily Loaded
A machine that breaks rock or other items into smaller pieces by crushing it with a jaw action or spinning it in a circular motion at high speeds. For example heavily loaded crushers could be crushing heavy rocks. Overload Class 30.

Escalator
An escalator is a conveyor transport device for transporting people. Overload Class 5.

Fan – Low Inertia
A device for creating a current of air. Low inertia would be a fan with a small mass. Overload Class 10A.

Fan – Medium Inertia
A device for creating a current of air. Medium inertia would be a fan with a medium mass. Overload Class 20.

Fan – High Inertia
A device for creating a current of air. High inertia would be a fan with a large mass. Overload Class 30.

Feeder – Screw
Screw feeders are used in various industries for the metering of material into a production process, usually consisting of a cylindrical tube with a screw shaped object in the centre which moves material from one end to the other. Overload Class 10.

Grinder
A spinning disk used to grind materials. Used in mining and forestry among other industries. Overload Class 20. Hammer Mill A high-speed machine that uses hammers and cutters to crush, grind, chip, or shred solid waste. Overload Class 20.

Lathe Machines
A machine tool for shaping metal or wood; the work-piece turns about a horizontal axis against a fixed tool. Overload Class 10A.

Mills Flour Etc
A mill uses two large disks to grind the materials to a finer material. Overload Class 20.

Mixer – Lightly Loaded
Equipment used for mixing or blending the materials used in the manufacture of a number of items. Lightly loaded mixers generally mix materials such as liquids. Overload Class 10B.

Mixer – Heavily Loaded
Equipment used for mixing or blending the materials used in the manufacture of a number of items. Heavily loaded mixers generally mix materials such as concrete or high viscous materials. Overload Class 20.

Pelletisers
Pelletisers are machines that feed in materials extrude and cut the output into pellets. Overload Class 20.

Plastic and Textile Machines
These may be Injection moulding machines and other types of plastic and textile machines. Overload Class 5. Press,

Flywheel
A flywheel is a rotating disk used as a storage device for kinetic energy. Overload Class 20.

Pump – Centrifugal <100A
A pump consisting of rotating impeller enclosed in a housing and used to impart energy to a fluid through centrifugal force. Overload Class 5.

Pump – Centrifugal >100A
A pump consisting of rotating impeller enclosed in a housing and used to impart energy to a fluid through centrifugal force. Overload Class 10.

Pump – Positive Displacement Unloaded
A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Overload Class 10.

Rolling Mill
A rolling mill is a machine or factory for shaping materials by passing them between rollers. Overload Class 20.

Saw – Band
An endless saw consisting of a toothed metal band that is driven around two wheels, usually used for cutting metal or wood. Overload Class 10.

Saw – Circular
A power saw that has a steel disk with cutting teeth on the periphery; rotates on a spindle. Overload Class 20.

Screen – Vibrating
A vibrating screen is a large sieve used to separate different sized materials. Vibrating screens are used in many industries including mining and building. Overload Class 20.

Tumblers
Tumble polishing, or tumbling, is a technique for smoothing and polishing a hard substance. It consists of a large drum that rotates causing the materials in the centre to grind against each other. Overload Class 10

Wood Chipper
A tree chipper or wood chipper is a machine used for reducing wood (generally tree limbs or trunks) into smaller parts, such as wood chips or sawdust. Overload Class 30.