IEC 62019 pdf download

IEC 62019 pdf download Electrical accessories – Circuit-breakers and similar equipment for household use – Auxiliary contact units
1 Scope and object
This International Standard applies to auxiliary electromechanical contact units associated (or intended to be associated) with circuit-breakers for overcurrent protection, and with residual current operated circuit-breakers with or without integral overcurrent protection for household and similar installations, having a rated voltage not exceeding 440 V a.c. and 250 V d.c., and a rated current not exceeding 1 0 A.
NOTE 1 These requirements may also be used as guidance for auxiliary contacts units intended to be assembled with other switching devices for household and similar installations.
NOTE 2 It is recommended that the advice of the manufacturer be sought concerning any application with low level energy appliances (low level values of current and/or voltage.) For low-energy contacts, specific recommendations are given in IEC 60947-5-4.
The object of this standard is to state
a) the characteristics of the auxiliary contact units;
b) their electrical and mechanical requirements with respect to
1 ) the various duties to be performed;
2) the significance of the rated characteristics and of the markings;
3) the tests to verify the rated characteristics;
c) the functional requirements to be satisfied by the auxiliary contact units with respect to
1 ) environmental conditions, including those of enclosed equipment;
2) dielectric properties;
3) terminals;
4) safety of use.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441: Switchgear,controlgear and fuses
IEC 60065:1 998, Audio, video and similar apparatus – Safety requirements
IEC 601 1 2:1 979, Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions
ISO 306:1 994, Plastics – Thermoplastic materials – Determination of Vicat softening temperature (VST)
3 Definitions
For the purpose of this International Standard, the following definitions apply.
3.1
auxiliary contact
contact included in an auxiliary circuit and mechanically operated by the switching device [IEV 441 -1 5-1 0]
3.2
auxiliary contact unit
unit containing one or more control and/or auxiliary contacts mechanically operated by a main switching device
NOTE The main switching device may be a circuit-breaker, RCCB, RCBO, switch, etc.
4 Classification
Contact elements may be classified as follows.
4.1 According to the utilization categories (see table 1 of 5.4)
4.2 According to the electrical ratings based on utilization categories (see table 4)
4.3 According to one of the following constructions (see figure 1 )
4.3.1 Form A – Single-gap make-contact element
4.3.2 Form B – Single-gap break-contact element
4.3.3 Form C – Single-gap make-break three terminal change-over contact element
4.3.4 Other types (see note 1 )
4.4 According to the suitability for PELV and SELV circuits
NOTE 1 Other types are described in figure 1 . (See also clause 3 and figure 4 of IEC 60947-5-1 ).