IEC 60934-2013 pdf free.Circuit-breakers for equipment (CBE).
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(151):1978, International Electrotechnical Vocabulary (1EV) — Chapter 151: Electrical and magnetic devices
IEC 60050(441):1984, International Electrotechnical Vocabulary (1EV) — Chapter 441: Switch gear, controlgear and fuses
IEC 60050(604):1987, International Electrotechnical Vocabulary (1EV) — Chapter 604: Generation, transmission and distribution of electricity — Operation
IEC 60050(826):1982, International Electrotechnical Vocabulary (1EV) — Chapter 826: Electrical installations of buildings
Amendment 1 (1990)
Amendment 2 (1995)
Amendment 3 (1999)
IEC 60060-1:1989, High-voltage test techniques — Part 1: Genera! definitions and test requirements
lEG 60068-2-20:1979, Environmental testing — Part 2: Tests — Test T: Soldering
IEC 60099-1:1991, Surge arresters — Part 1: Non-linear resistor type gapped arresters for a.c. systems 1)
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V
IEC 60269 (all parts), Low-voltage fuses
IEC 60417-1:1998, Graphical symbols for use on equipment — Part 1: Overview and application
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code) IEC 60664 (all parts), Insulation coordination for equipment within low-voltage systems
3 Definitions
For the purposes if this International standard, the following definitions apply.
3.1 Definitions related to protection and switching devices
3.1.1 circuit-breaker mechanical switching device, capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and breaking currents under specified abnormal conditions such as those of short circuit [IEV 441-14-20]
3.1.2 circuit-breaker for equipment (CBE) circuit-breaker specifically designed for the protection of equipment
NOTE These CBEs are intended for:
automatic interruption and non-automatic or automatic resetting;
automatic interruption and non-automatic or automatic resetting and manual switching operation.
4 Classification
CBEs are classified according to the following criteria.
4.1 QuantIty of poles
— the number of poles:
— the number of protected poles.
NOTE The pole which is not a protected pole may be an unprotected pole or a switched neutral.
4.2 Method of mounting
— surface type;
— flush type;
— panel-mounting type.
— integral-mounting type.
NOTE I Panel•mounling types comprise snap-on types and flange types.
NOTE 2 Integral-mounting types are types which are kept in place by fixation means and do not require any other
mounting means,
4.3 Method of connection
— CBEs, the connections of which are not associated with the mechanical mounting;
— CBEs, one or more connections of which are associated with the mechanical mounting, for example:
• plug-in type:
• bolt-on type;
• screw-in type:
• solder-in type.
NOTE Some CBEs may be of the plug-in type or bolt-on type on the line side only, the load terminals being usually suitable for wiring connection.
4.4 Method of operation
4.4.1 CBEs for automatic interruption and non-automatic (manual) resetting only (R-type).
4.4.2 CBEs for automatic interruption and non-automatic (manual) resetting, provided with means for manual operation designed for occasional manual switching, but not designed for regular manual switching operations under normal load conditions (M-type).IEC 60934 pdf free download.