Shrnutí návrhu

This clause of Part 1 is replaced by the following:

This document applies to automatic thermo-electro-mechanical current sensing controls with manual reset action intended to be incorporated or integrated into appliances. These products are designed to limit the load current below a certain value to prevent a potential hazard due to misapplication or overloading condition during user operation of the appliance. These products are:

Ÿ  for use in, on, or in association with appliances for household and similar use that are not in fixed installation;

NOTE 101 Thermo-electro-mechanical current sensing controls regulate current by converting temperature changes into mechanical movement. In these controls, a thermal element—commonly a bimetallic strip—bends in response to heat generated by current flow, triggering a switching mechanism that limits or interrupts the current to ensure overload protection.

EXAMPLE 101 Controls for motor-operated appliances within the scope of IEC 60335 series.

Ÿ  for assembly within the scope of IEC 60884-2-7;

Ÿ  for equipment that is used by the public, such as equipment intended to be used in shops, offices, hospitals, farms, and the like;

NOTE 102 Throughout this document, the word "equipment" means "appliance and equipment".

EXAMPLE 102 Controls for commercial catering.

Ÿ  used as supplementary overcurrent protection in appliances;

NOTE 104 These devices are not intended to replace fuses, circuit-breakers, etc.

Ÿ  used in, on, or in association with equipment that use electricity.

This document applies to

—  the inherent safety of automatic thermo-electro-mechanical current sensing controls, and

—  functional safety of automatic thermo-electro-mechanical current sensing controls,

—  the operating values, operating times, and operating sequences where such are associated with equipment safety.

—  Thermo-electro-mechanical current sensing controls that incorporate manually actuated switches as part of its construction.

NOTE 105 Requirements for manually actuated mechanical switches not forming part of an automatic control are contained in IEC 61058-1-1 .

This document specifies the requirements for construction, operation and testing of incorporated or integrated thermo-electro-mechanical current sensing controls used in, on, or in association with an equipment.

NOTE 106 An example of such controls is current sensing cut-out control.

This document does not

Ÿ  apply to electronic controls.

Ÿ  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 equipment standard or as determined by the manufacturer shall apply.

Ÿ  apply to current sensing devices such as ground-fault circuit interrupters (GFCI), arc-fault circuit interrupters (AFCI), circuit breakers (CB), residual-current devices (RCDs).

NOTE 107 Current sensing cut-out controls provide supplementary protection during overload conditions. Unlike circuit breakers and fuses which are designed to protect against more severe overcurrent conditions and typically require professional intervention, current sensing cut-out controls are intended to prevent damage caused by moderate overcurrent conditions and to improve user experience by avoiding the need for professional repair in such situations. These controls are not meant to replace circuit breakers or fuses but serve as an additional protective mechanism in user-accessible applications, particularly during overload situations. Fuses are covered by IEC 60127 series or IEC 60269 series. Circuit breakers intended to provide protection against overcurrent are covered by IEC 60898-1.

NOTE 108 Devices covered by IEC 60934 are independent overcurrent protective devices providing defined breaking capacities, short-circuit performance and coordination with the equipment supply circuit. In contrast, the thermo-electro-mechanical current sensing controls covered by this document are incorporated  protective controls intended to limit overload currents only, without providing short-circuit protection or the independent protective functions required by IEC 60934. These controls are therefore not interchangeable with CBEs and are not intended to fulfil the same protective purpose.

For more information about guide to the application of current sensing cut-out controls see Annex AA.