Danfoss VLT, Pocket Manual, Page: 57 / 64

VLT ® Soft Starter Pocket Guide 57
Grinder – a machine which reduces the size of small particles through
compression and attrition. For machines operating on larger items, see
Crusher.
Gyratory crusher – see Crusher, cone.
Hydraulic power pack – A hydraulic pump which is used to supply
pressurised hydraulic fl uid.
IP rating – a description of the soft starter’s level of physical protec-
tion, according to IEC 60529.
Kickstart – a method of soft starting a motor which uses a high level of
current for a short period at the beginning of a current limit or current
ramp start.
Locked rotor current – the amount of current a motor will draw in
locked rotor situations, including full voltage starts. Locked rotor
current is described as a percentage of full load current.
Locked rotor time – the maximum amount of time a motor can safely
run at locked rotor current.
Locked rotor torque – the amount of torque a motor will produce at
locked rotor current (such as a full voltage start). Locked rotor torque is
described as a percentage of full load torque.
Mill, ball – a machine which grinds or mixes materials such as ores,
chemicals, ceramics and paints. The machine consists of a horizontal
cylinder which is rotated, causing the grinding medium, commonly
stainless steel balls, to repeatedly crush the material inside to a powder.
Mill, hammer – a machine which crushes material into smaller pieces.
Hammers attached to rotating disks repeatedly strike the material until
it is small enough to fall through openings at the bottom of the mill.
Mill, roller – a machine which crushes material into smaller pieces.
Material is passed between two horizontal rollers which rotate in
opposite directions, crushing the material into smaller pieces.
Milliscreen – a machine which separates solids from slurry, using an
inclined rotating drum with perforated sides.
Glossary