IEC 62310-1-2005 pdf – Static transfer systems (STS) – Part 1: General and safety requirements

IEC 62310-1-2005 pdf – Static transfer systems (STS) – Part 1: General and safety requirements.
1 Scope IEC 62310 consists of three parts and applies to free standing a.c. static transfer systems (STS) intended to ensure the continuity of power to load by automatically or manually controlled transfer, with or without interruption, from two or several a.c. independent sources. This part of IEC 62310 concerns general and safety requirements. See future IEC 62310-2 for electromagnetic compatibility (EMC) and futureIEC 62310-3 for the method of specifying performance and test requirements. This part of IEC 62310 is intended to reduce the risk of fire, electric shock, or injury to persons from installed equipment subject to installing, operating, and maintaining the equipment in the manner prescribed by the manufacturer. This part of IEC 62310 includes requirements for the switching elements, their control and protective elements, where applicable. This part of IEC 62310 also includes information for the overall integration of the STS and its accessories into the a.c. power distribution system. Components or devices necessary for the operation/control/protection/isolation (e.g. circuit- breakers, fuses, transformers, etc.) of a STS should comply with the requirements of the relevant IEC standards and are not covered by this part of IEC 62310. This standard applies to systems up to 1 000 V (a.c. value) which are intended to be used in single phase or phase-phase or three phase applications. This standard does not apply to: − devices for d.c. source switching; − static transfer system using only electromechanical switching devices intended to be used in emergency power systems with interruption of the supply to the load during transfer. This equipment is covered by IEC 60947-6-1; − the automatic switching devices integrated into UPS covered by IEC 62040 series.
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 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test requirements IEC 60073, Basic and safety principles for man-machine interface, marking and identification – Coding principles for indicators and actuators IEC 60083, Plugs and socket-outlets for domestic and similar general use, standardised in member countries of IEC IEC 60085, Electrical insulation – Thermal classification IEC 60112, Method for the determination of the proof and the comparative tracking indices of solid insulating materials IEC 60364-5-54, Electrical installations of buildings – Part 5-54: Selection and erection of electrical equipment – Earthing arrangements, protective conductors and protective bonding conductors IEC 60364-7-707, Electrical installations of building – Part 7: Requirements for special installations or locations – Section 707: Earthing requirements for the installation of data processing equipment IEC 60417-DB:2002 3 , Graphical symbols for use on equipment IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 60664-1:1992, Insulation co-ordination for equipment within low-voltage systems – Part 1: Principles, requirements and tests 4 Amendment 1 (2000) Amendment 2 (2002) IEC 60664-3:2003, Insulation coordination for equipment within low-voltage systems – Part 3: Use of coating, potting or moulding for protection against pollution IEC 60730-1:1999, Automatic electrical controls for household and similar use – Part 1: General requirements 5 Amendment 1 (2003) IEC 60755, General requirements for residual current operated protective devices
3.1.5 maintenance by-pass power path designed to allow isolation of an appropriate section or sections of a STS for safety during maintenance and/or to maintain continuity of load power 3.1.6 redundant system addition of functional units or groups of functional units in a system to enhance the continuity of power to the load 3.1.7 STS input power power supplied to STS and bypass, if any, which can be either the preferred source or the alternate source 3.1.8 alternate source source used as alternate power supply of the load when the preferred source fails or is out of tolerance or is switched off for maintenance 3.1.9 preferred source source used as normal power supply to the load, usually set by the operator