UL 60730-2-4:2014 PDF Download

The UL 60730-2-4:2014 standard is titled "Standard for Automatic Electrical Controls for Household and Similar Use; Part 2: Particular Requirements for Thermal Motor Protectors for Motor-Compressors of Hermetic and Semi-Hermetic Type." This standard specifies the requirements for the safety and performance of thermal motor protectors used with sealed motor-compressors, specifically hermetic and semi-hermetic types.

The standard applies to thermal motor protectors that use NTC or PTC thermistors. It also incorporates requirements for testing the combination of motor and thermal motor protectors, which are outlined in IEC Publication 60335-2-34. The standard covers inherent safety, operating values, operating times, and operating sequences associated with the safety of equipment.

It is important to note that the standard applies to thermal motor protectors used in household applications as well as applications where the public may use the equipment, such as shops, light industry, and farms. However, it does not apply to thermal motor protectors designed exclusively for industrial applications.

The standard does not cover other means of motor protection or manual devices for opening circuits. It applies to thermal motor protectors for use with electric motors up to a rated voltage of 690 V and a rated output of 11 kW or less. For hermetic motor-compressors, the rated voltage must be equal to or less than 600 V, with no specific output power limits.

In terms of testing, the standard does not consider the response value of an automatic action of a control if it depends on the method of mounting the control in the equipment. If the response value is significant for user or surroundings protection, it should be defined in the appropriate household equipment standard or determined by the manufacturer.

Normative references are also included in the standard, such as IEC 60269-1 for low-voltage fuses, IEC 60269-3 for supplementary requirements of fuses for household applications, and IEC 60335-2-34 for safety requirements of motor-compressors. Additionally, UL 60335-2-34, which covers particular requirements for motor-compressors, is quoted in this standard.