BSI 19/30402920 DC:2019 Edition
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BS EN IEC 60364-5-53 AMD1. Low-Voltage electrical installations – Part 5-53. Selection and erection of electrical equipments. Isolation, switching and control Clause 531
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 19 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | 531 Equipment for protection against electric shock 531.1 General 531.2 Devices for automatic disconnection of supply 531.2.1 General 531.2.2 Overcurrent protective devices 531.2.2.1 TN system An overcurrent protective device shall be so selected that its operating characteristics meet the following requirement: |
| 6 | Uo is the nominal AC or DC line-to-earth voltage in volts (V). 531.2.2.2 TT system 531.2.2.3 IT system |
| 7 | 531.2.3 Residual current protective devices 531.2.3.1 General conditions of installation |
| 8 | 531.2.3.2 Unwanted tripping 531.2.3.3 Types of RCDs 531.2.3.3.1 Selection of type of RCD 531.2.3.3.2 Selection of the types of RCDs connected in series 531.2.3.4 Selection according to the accessibility to the installation 531.2.3.4.1 In AC installations where RCDs are accessible to ordinary persons (BA1), children (BA2) or handicapped persons (BA3) residual current protective devices shall comply with: 531.2.3.4.2 |
| 9 | 531.2.3.4.3 531.2.3.5 Selection of RCD according to the type of system earthing 531.2.3.5.1 TN systems 531.2.3.5.2 TT systems |
| 10 | 531.2.3.5.3 IT systems 531.2.3.5.3.1 Disconnection at first fault condition 531.2.3.5.3.2 Disconnection at second fault condition |
| 11 | 531.3 Equipment for protection by double or reinforced insulation 531.3.1 General 531.3.2 The following requirements apply as specified: |
| 12 | 531.3.3 Where lids or doors in the insulating enclosure can be opened without the use of a tool or key, all conductive parts which are accessible if the lid or door is open shall be behind an insulating barrier (providing a degree of protection not less tha… 531.3.4 Conductive parts enclosed in the insulating enclosure shall not be connected to a protective conductor. However, provision may be made for connecting protective conductors which necessarily run through the enclosure in order to serve other items of e… 531.3.5 531.3.6 531.3.7 Installation The installation of equipment mentioned in 412.2.1 of IEC 60364-4-41: 2017 (fixing, connection of conductors, etc.) shall be effected in such a way as not to impair the protection afforded in compliance with the equipment specification. 531.4 Equipment for protection by protective electrical separation 531.5 Equipment for protection by extra-low-voltage provided by SELV and PELV systems 531.5.1 Sources for SELV or PELV systems A safety isolating transformer in accordance with IEC 61558-2-6. A source of current providing a degree of safety equivalent to that of the safety isolating transformer specified before (e.g. motor generator with windings providing equivalent isolation). An electrochemical source (e.g. a battery) or another source independent of a higher voltage circuit (e.g. a diesel-driven generator). Certain electronic devices complying with appropriate standards where provisions have been taken in order to ensure that, even in the case of an internal fault, the voltage at the outgoing terminals cannot exceed the values specified in Clause 414.1… |
| 13 | Mobile sources supplied at low voltage, e.g. safety isolating transformers or motor generators, shall be selected or erected in accordance with the requirements for protection by the use of double or reinforced insulation (see Clause 412 IEC 60364-4… 531.5.2 Selection of plugs and socket-outlets 531.6 Devices for additional protection 531.7 Monitoring devices |
| 14 | Annex A (informative) Description of the different types of residual current devices (RCDs) |
| 18 | Annex B (informative) List of notes concerning certain countries |
