1. Scope of application
The contactors involved in this standard are generally not used to break short-circuit currents, so appropriate short-circuit protection appliances should be equipped during equipment installation (see 9.3.4). This standard does not apply to the following electrical appliances: - contactors that comply with IEC60947-4-1; - semiconductor contactors; -- Contactors for special purposes; - Auxiliary contacts for contactors, see IEC 60947-5-1 for their requirements. This standard specifies: a) the characteristics of contactors; b) The requirements that contactors should meet: 1) operation and performance; 2) dielectric performance; 3) enclosure protection level (if applicable); 4) structure; 5) electromagnetic compatibility. c) The tests and methods used to verify compliance with the above requirements; d test procedures and quantity of samples; c) The information to be provided in the contactor or manufacturer's sample. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 2423.3-2006 Environmental Testing for Electrical and Electronic Products, Part; Test Method Test Cab: Constant Damp Heat Test (1EC 60068-2-78:2001, IDT) GB/T 2900.71-2008 Electrotechnical Terminology Electrical Devices (IEC60050-826:2004, IDT) GB/T 2900.83-2008 Electrical Terminology: Electrical and Magnetic Devices (IEC 60050-1512001, IDT) GB/T 3398.2-2008 Plastics Hardness Determination, Part?: Rockwell Hardness (ISO 2039-2:1987, IDT) GB/T4025-2010 Basic and Safety Rules for Human Machine Interface Markings: Coding Rules for Indicators and Operating Devices (IEC60073:2002, 1DT) GB/T 4026-2010 Basic and Safety Rules for Human Machine Interface Markings: Identification of Equipment Terminals and Conductor Terminals (IEC60445: 2006, IDT) GB/T 4205-2010 Basic and Safety Rules for Human Machine Interface Markings (IEC 60447; 2004, IDT)
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