Alarm systems - Part 1: General requirements – Section Two: Power Units, Test Method and Performance Criteria

Document Number: NL IEC 60839 1 2 : 2005
Sector: Electrical Engineering
TC: NL TC IRI
ICS:
This standard specifies the requirements, test methods and performance criteria for power supply units for alarm systems. The specific requirements for particular system components are specified in separate standards, which shall be used in conjunction with the standard. The configuration of the power supply will depend upon the available sources of the power and the requirements of the alarm systems and shall consist of one or more of the following A) Primary batteries B) Secondary batteries(with or without a built in charger from an external safety extra low voltage source C) Power units with mains supply via safety isolating transformer. 1) with no other components 2) With a rectifier for supplying direct current 3) With a secondary battery and charger as back up supply 4) with a primary battery as a back-up supply 5) Incorporating an inverter or switching mode unit D) A combination of the types indicated in a),b) and c) to form a composite power supply unit .