The IEC 62310 series applies to free standing operation a.c. static transfer systems (STS)
intended to ensure the continuity of load supply through controlled transfer, with or without
interruption of power, from two or more independent a.c. sources.
The IEC 62310 series includes requirements for the switching elements, their control and
protective elements, where applicable. The IEC 62310 series also includes information for the
overall integration of the STS and its accessories into the a.c. power network.
This standard applies to systems up to 1 000 V a.c. which are intended to be used in singlephase,
phase-phase or three-phase applications
This part of IEC 62310 takes precedence over all aspects of the generic standards, and no
additional testing is necessary.
The requirements have been selected so as to ensure an adequate level of Electromagnetic
Compatibility (EMC) for STS at public and industrial locations. These levels cannot, however,
cover extreme cases which may occur in any location, but with extremely low probability of
occurrence.
It takes into account the differing test conditions necessary to encompass the range of
physical sizes and power ratings of STS.
A STS, whether presented as a unit or an assembly of units shall meet the relevant
requirements of this part of IEC 62310 as a stand-alone product. EMC phenomena produced
by any supply or load connected to the input or output of the STS equipment shall not be
taken into account.
This standard does not apply to:
– devices for d.c. source switching;
– single source systems;
– transfer systems using only electromechanical switching devices intended to be used in
emergency power systems with interruption of the supply to the load during transfer;
NOTE 1 Such equipment is covered by IEC 60947-6-1.
– automatic switching devices integrated into Uninterruptible Power Systems (UPS) covered
by the IEC 62040 series.
NOTE 2 For STS intended to be used in vehicles, on board ships or aircraft, in tropical countries, for Emergency
Power Systems (such as those used for health care facilities, fire fighting, emergency rescue, etc.), or at altitudes
greater than 1 000 m, different requirements may be necessary.
This part of IEC 62310 concerns Electromagnetic Compatibility (EMC). See IEC 62310-1 for
general and safety requirements.
Special installation environments are not covered, nor are fault conditions of STS taken into
account.
This standard specifies:
– EMC requirements;
– test methods;
– minimum performance levels.
IEC 62310-2:2006 history
2006IEC 62310-2:2006 Static transfer systems (STS) - Part 2: Electromagnetic Compatibility (EMC) requirements