This guide has been produced for use in PD6662:2010 – Scheme for the application of European standards for Intruder and Hold up alarm systems. BSIA has produced other guides specifically for the PD6662:2004 Scheme, which may not be appropriate for this scheme. Therefore you should seek the appropriate guidance.
The APS is typically represented by any local standby power source (e.g. rechargeable battery) within the design and control of the I&HAS that can power the I&HAS (or part thereof) for a predetermined period of time in the event of loss of the EPS. Note that from EN50131-1 clause 9.2, if an SPPS is automatically switched into operation on loss of the PPS, the overall system standby period from the APS is reduced to 4 hours for I&HAS grades 2, 3 and 4.
This clause refers to completely independent outputs from a power supply where a short circuit and/or overload on one output will have no affect on the others. Each output may have multiple connections. Simple fused outputs may not qualify as being independent if an overload or short circuit on one has an effect, even if only transitory (e.g. during finite time for fuseable link to fail), on another.
|Example general arrangement of PS and CIE with independent outputs|
Note that there is no longer a table within EN50131-6 for standby capability.
This is replaced by the simple requirement that the PS must be capable of meeting the system requirement of EN50131-1, Table 23.
There is inconsistency between the requirements of EN50131-6:2008 and those for CIE in EN50131-3:2009. For consistency, the requirements of EN50131-3:2009, clause 8.7 should be applied.
These tests should be replaced by those from EN50131-3:2009 clause 11.9 (see clause 4.11, above).