{"schemaVersion":1,"slug":"iec-motor-starter-form-motor-starter-1-pole-normally-closed-power","name":"IEC motor-starter form: motor starter 1 pole normally closed (power)","kind":"symbol","abbreviation":"KM","aliases":["HMS22P","VMS22P","motor-starter form Motor Starter 1 Pole Normally Closed (Power)"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Motor-starter form form: Motor Starter 1 Pole Normally Closed (Power).","description":["A motor starter uses an operating coil and power contacts to control the motor feeder. The coil belongs to the control circuit; the main contacts carry motor current. Auxiliary contacts report or interlock operation but do not replace the main poles. This entry identifies the motor starter 1 pole normally closed (power) form in the publisher's IEC-context family.","A start command can energise the starter coil while the linked main poles connect the motor supply. Reuse the same device tag on the coil and contacts, then cross-reference overload and short-circuit protection as distinct parts of the feeder. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state.","The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design."],"readingNotes":["The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state.","The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design."],"drawingChecklist":["Use one starter tag across coil, main poles and auxiliaries.","Identify the control supply and the main power path.","Reference motor protection and the complete pole arrangement."],"distinction":"This entry adds the motor starter 1 pole normally closed (power) detail to the broader motor-starter form family. The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design.","facts":[{"label":"Drawing form","value":"Motor Starter 1 Pole Normally Closed (Power)"},{"label":"Public vendor block names","value":"HMS22P / VMS22P. Autodesk identifiers, not standards database IDs."},{"label":"Drawing purpose","value":"motor-starter form"},{"label":"Graphic scope","value":"Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint."}],"references":[{"sourceId":"s28-iec-motor-starters","relevance":"Public Motor Starters table explicitly lists HMS22P / VMS22P with this operating or connection form. Vendor graphics are linked, not copied."}],"related":["contactor","motor","motor-overload-trip-nc-contact"],"artwork":"s28-iec-motor-starter-form-motor-starter-1-pole-normally-closed-power","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Motor Starter 1 Pole Normally Closed (Power)","reference":"Autodesk IEC-60617 Symbol Preview: Motor Starters, HMS22P / VMS22P. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted."},"plainEnglish":{"title":"What does IEC motor-starter form: motor starter 1 pole normally closed (power) mean?","introduction":"A motor starter uses an operating coil and power contacts to control the motor feeder. The coil belongs to the control circuit; the main contacts carry motor current. Auxiliary contacts report or interlock operation but do not replace the main poles. This entry identifies the motor starter 1 pole normally closed (power) form in the publisher's IEC-context family.","example":"A start command can energise the starter coil while the linked main poles connect the motor supply. Reuse the same device tag on the coil and contacts, then cross-reference overload and short-circuit protection as distinct parts of the feeder. The normally-closed designation starts with a conducting output or closed contact in the documented reference condition; operation changes that state.","drawings":"The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Coil","meaning":"A wound conductor that can produce a magnetic field when energised."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Autodesk IEC-60617 Symbol Preview: Motor Starters","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-447B81E9-A99C-447D-A25B-C2C061D43BC3.htm"}],"detail":"Motor-starter form form: Motor Starter 1 Pole Normally Closed (Power). This entry adds the motor starter 1 pole normally closed (power) detail to the broader motor-starter form family. The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-motor-starter-form-motor-starter-1-pole-normally-closed-power","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-motor-starter-form-motor-starter-1-pole-normally-closed-power.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"s28-iec-motor-starters","title":"Autodesk IEC-60617 Symbol Preview: Motor Starters","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-447B81E9-A99C-447D-A25B-C2C061D43BC3.htm","type":"cad-reference","scope":"Public motor starters family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public Motor Starters table explicitly lists HMS22P / VMS22P with this operating or connection form. Vendor graphics are linked, not copied."}]}