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UL 62841-1-2019 pdf free download
UL 62841-1-2019 pdf free download.Electric Motor-Operated Hand-Held Tools, Transportable Tools And Lawn And Garden Machinery — Safety — Part 1: General Requirements.
Tools for a.c. which are not marked with 1i.*iEO FREQUENCY, or marked with a RATED roucv R.* of 50 Hz to 60 Hz or with 50/60 Hz. are tested with either 50 Hz or 60 Hz, whichever is the most unfavourable, unless the tool employs only series motors, in which case either frequency may be used.
5.7.2 Tools having more than one RATED VOLTAGE or having a RATED VOLTAGE P.ANGE are tested at the highest voltage.
5.7.3 For tests that require a value for RATED CURRENT and with tools where there is no marked RATED CURRENT, the value of the RATED CURRENT is substituted by the current measured when the tool is operated at RATED INPUT at the lowest RATED VOLTAGE or the lower value of the RATED VOLTAGE RANGE.
5.8 When alternative heating elements or A7-rAC1#uwrS are made available for the tool by its manufacturer, the tool is tested with those heating elements or ATTACHMENTS which give the most unfavourable results.
5.9 Tools are tested with the specified flexible suv coo connected to the tool.
5. 10 If ci..sss TOOLS have ACCESSIBLE .Rrs which are not connected to an earthing terminal or earthing contact, and are not separated from UVE virs by an intermediate metal part which is connected to an earthing terminal or earthing contact, such parts are checked for compliance with the appropriate requirements specified for ci*ss u CONS TRUCflON.
5.11 It ctss TooLs or ctss a roots have parts operating at SAFETY EXTRA-LOW VOLTAGE, such parts are checked for compliance with the appropriate requirements specified for css Ill TOOLS.
5.12 When testing ELECTRONIC CIRCUITS, the supply is to be free from those perturbations from external sources that can influence the results of the tests.
5.13 If, in NORMAL USE, a heating element, if any, cannot be operated unless the motor is running, the element is tested with the motor running. If the heating element can be operated without the motor running, the element is tested with or without the motor running, whichever is the more unfavourable. Heating elements incorporated in the tool are connected to a separate supply unless otherwise specified.
5.14 For ATTACHMENTS performing a function which is within the scope of one of the relevant parts of lEG
62841-2, IEC 6284 1-3 or IEC 62841.4, the tests are made in accordance with that part of IEC 62841-2, IEC 62841-3 or IEC 62841-4.
5.15 II a torque is to be applied, the method of loading is chosen so as to avoid additional stresses, such as those caused by side thrust. Additional loads necessary for the correct operation of the tool are, however, taken into consideration.
If a brake is used for applying a load, it must be applied gradually to assure that the starting current does not affect the test. Modification of output means for purpose of loading is permitted for the connection to a brake.UL 62841-1-2019 pdf free download.
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