UL 1564-2009 pdf download – Industrial Battery Chargers
3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 In the following text, the term ″product″ is used to mean an industrial battery charger. 5.2 For the purpose of this standard, the following definitions apply. 5.3 CLASS 2 TRANSFORMER – A step-down transformer complying with the applicable requirements in the Standard for Low Voltage Transformers – Part 1 : General Requirements, UL 5085-1 and the Standard for Low Voltage Transformers – Part 3: Class 2 and Class 3 Transformers, UL 5085-3, or the Standard for Class 2 Power Units, UL 1 31 0. 5.3 revised November 1 2, 2008 5.4 INDUSTRIAL BATTERY – A battery that is intended for cycling service and is rated in number of cells and in ampere-hours delivered at the 6-hour discharge rate. 5.5 LIMITED-ENERGY CIRCUIT – An ac or dc circuit having a voltage not exceeding 1 000 volts and the energy limited to 1 00 volt-amperes by either a secondary winding of a transformer, one or more resistors complying with 24.4.1 0 and 24.4.1 1 , or a regulating network complying with 24.4.1 . 5.6 LOW-VOLTAGE, LIMITED-ENERGY (LVLE) CIRCUIT – A circuit involving an alternating current voltage of not more than 30 volts, rms (42.4 volts peak), or a direct current voltage of not more than 60 volts and supplied by either of the following:
a) An inherently limited Class 2 transformer or power unit or a not inherently limited Class 2 transformer or power unit and an overcurrent protective device that is: 1 ) Not of the automatic reclosing type; 2) Trip-free from the reclosing mechanism; and 3) Either not readily interchangeable with a device of a different rating or a marking in accordance with 48.5 is provided. b) A combination of an isolated transformer secondary winding and one or more resistors or a regulating network complying with 24.4.1 0 that complies with all the performance requirements for an inherently limited Class 2 transformer or power source.