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Standards Development
Replacement:
This document applies to the inherent safety and evaluation of thermal motor protectors intended to be integrated or incorporated in:
- motors used in equipment but not limited to the scope of IEC 60335-1 and its Part 2’s.
- sealed (hermetic and semi-hermetic type) motor-compressors.
NOTE Throughout this standard, the word “equipment” means “appliance and equipment”.
Thermal motor protectors that are off winding (not integrated with the motor winding) to the motor are covered under the scope of this document and may be considered incorporated controls with respect to the requirements of this standard. Thermal protectors with integral heating elements (resistors, thermistors and the like) are considered voltage maintained thermal cutouts and are covered under IEC 60730-2-9.
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 document applies to thermal motor protectors:
using NTC or PTC thermistors, requirements for which are contained in Annex J.
responsive 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 equipment as well as in sealed (hermetic and semi-hermetic type) motor-compressors.
not intended for normal household use, but which nevertheless may be used by the public, such as in equipment intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.
This document does not apply to:
thermal motor protectors designed exclusively for industrial applications unless no relevant safety standard exists.
other means of motor protection.
a manual device for opening the circuit.
2 Normative references
Addition:
IEC 60269-3, Low-voltage fuses – Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) – Examples of standardized systems of fuses A to FIEC 60335-2-34:2012, Household and similar electrical appliances – Safety – Part 2-34: Particular requirements for motor-compressors
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