UL Standard for Safety Automatic Electrical Controls – Part 2-22: Particular requirements for thermal motor protectors (COMMENTS DUE: November 4@ 2016)
In general@ this part of IEC 60730 applies to automatic ELECTRICAL CONTROLS for use in@ on@ or in association with equipment for household and similar use. The equipment may use electricity@ gas@ oil@ solid fuel@ solar thermal energy@ etc.@ or a combination thereof. NOTE 1 Throughout this standard the word ?equipment? means ?appliance and equipment.? EXAMPLE 1 CONTROLS for appliances within the scope of IEC 60335. This International Standard is applicable to CONTROLS for building automation within the scope of ISO 16484. This standard also applies to automatic ELECTRICAL CONTROLS for equipment that may be used by the public@ such as equipment intended to be used in shops@ offices@ hospitals@ farms and commercial and industrial applications. EXAMPLE 2 CONTROLS for commercial catering@ heating and air-conditioning equipment. This standard is also applicable to individual CONTROLS utilized as part of a CONTROL system or CONTROLS which are mechanically integral with multifunctional CONTROLS having non-electrical outputs. EXAMPLE 3 Independently mounted water valves@ CONTROLS in smart grid systems and CONTROLS for building automation systems within the scope of ISO 16484-2. This standard is also applicable to relays when used as CONTROLS for IEC 60335 appliances. Additional requirements for the safety and OPERATING VALUES of relays when used as CONTROLS for IEC 60335 appliances are contained in Annex U. NOTE 2 These requirements are referred to in the scope of IEC 61810-1. NOTE 3 This standard is intended to be used for the testing of any stand-alone relay which is intended to be used as a CONTROL of an appliance according to IEC 60335-1. It is not intended to be used for any other stand-alone relay@ or to replace the IEC 61810 series of standards. This standard does not apply to automatic ELECTRICAL CONTROLS intended exclusively for industrial process applications unless explicitly mentioned in the relevant part 2 or the equipment standard. This standard applies to CONTROLS powered by primary or secondary batteries@ requirements for which are contained within the standard@ including Annex V. This International Standard applies to the inherent safety@ to the OPERATING VALUES@ OPERATING TIMES@ and OPERATING SEQUENCES where such are associated with equipment safety@ and to the testing of automatic ELECTRICAL CONTROL devices used in@ or in association with@ equipment. This standard applies to CONTROLS using THERMISTORS@ see also Annex J. This standard is also applicable to the FUNCTIONAL SAFETY of LOW COMPLEXITY SAFETY RELATED SYSTEMS and CONTROLS. This standard does not take into account the RESPONSE VALUE of an AUTOMATIC ACTION of a CONTROL@ if such a RESPONSE VALUE is dependent upon the method of mounting the CONTROL in the equipment. Where a RESPONSE VALUE is of significant purpose for the protection of the USER@ or surroundings@ the value defined in the appropriate household equipment standard or as determined by the manufacturer shall apply. This standard applies also to CONTROLS incorporating ELECTRONIC DEVICES@ requirements for which are contained in Annex H. This part of IEC 60730 applies to the partial evaluation of THERMAL MOTOR PROTECTORS as defined in IEC 60730-1 for household and similar use@ including heating@ air conditioning and similar applications as well as for sealed (hermetic and semi-hermetic type) motor-compressors. NOTE A THERMAL MOTOR PROTECTOR is considered an INTEGRATED CONTROL since its protective functionality is dependent on the correct mounting and fixing in or on a motor and which can only be fully tested in combination with the relevant motor. This dependency is illustrated by: ? the ability of the THERMAL MOTOR PROTECTOR to accurately and reliably sense the heat of the motor windings; thus@ addressing the over-temperature protection due to motor overload conditions; ? the ability of the THERMAL MOTOR PROTECTOR to accurately and reliably sense the current due to motor locked-rotor conditions; thus@ reducing the response time and not being adversely affected by heat-sink at the assembly spot in the application; ? the influence of the motor??s electromagnetic field on the switch behaviour of the THERMAL MOTOR PROTECTOR; particularly@ affecting the arc direction between the contacts resulting in uneven wear of the contact material and eventually leading to failure of operation. Requirements concerning the testing of the combination of sealed (hermetic and semi-hermetic type) motor-compressors and THERMAL MOTOR PROTECTORS are given in IEC 60335-2-34. This standard applies to THERMAL MOTOR PROTECTORS using NTC or PTC thermistors@ additional requirements for which are contained in Annex J. DV DE Modification of 1.1 to by adding the following note after the third paragraph: Thermal motor protectors that are off-winding (not integrated with the motor winding) to the motor are covered under the scope of this part 2 and may be considered incorporated controls with respective to the requirements of this standard. Thermal protectors using thermistors as voltage maintained thermal cutouts are covered under IEC 60730-2-9. This standard applies to the inherent safety@ to the OPERATING VALUES@ OPERATING TIMES@ and OPERATING SEQUENCES@ where such are associated with equipment safety@ and to the testing of THERMAL MOTOR PROTECTORS used in or on household or similar equipment as well as sealed (hermetic and semi-hermetic type) motor-compressors. This standard applies to THERMAL MOTOR PROTECTORS for appliances within@ but not limited to@ the scope of IEC 60335-1 and its Part 2??s. NOTE Throughout this standard@ the word ??equipment?? means ??appliance and equipment??. THERMAL MOTOR PROTECTORS not intended for normal household use@ but which nevertheless may be used by the public@ such as equipment intended to be used by laymen in shops@ in light industry and on farms@ are within the scope of this standard. This standard does not apply to THERMAL MOTOR PROTECTORS designed exclusively for industrial applications. DV D2 Addition: DV.1 This part 2 is to be used in conjunction with the latest applicable country??s edition of 60335-1 and its amendments. This standard does not apply to other means of motor protection. This standard does not apply to a manual device for opening the circuit. DV D2 Addition: DV.1 This standard applies to thermal motor protectors designed for household@ commercial@ or industrial use.