UL 248-6:2010 free download Low-Voltage Fuses – Part 6: Class H Non-Renewable Fuses
1 GeneralNOTE –
This Part is intended to be read together with the Standard for Low-Voltage Fuses – Part 1: General Requirements, hereafterrelferred to as Part 1.The numbering of the Clauses in this Part correspond to like numbered Clauses in Part 1. The requirementsof Part 1 apply unless modified by this Part. For Clauses not shown below, refer to the Standard for Low-Voltage Fuses – Part 1:General Requirements，NMX-J-O09/248/6-2000-ANCE· CAN/CSA C22.2 No.248.1 UL 248-1.
1.1 Scope
This Part applies to Class H Non-Renewable fuses rated 600 A or less and either 250 or 600 v ac. DCratings are optional.
4 Classification
Class H Non-Renewable fuses have an interrupting rating of 10,000 A.Both of the voltage ratings 250 vac and 600 V ac are divided into six body sizes with the maximum current rating in each size as specifiedin this Part.These fuses are not classified as current limiting. Time-delay ratings are optional.
In Canada，250 V ac fuses rated 15 – 60 A shall have a low melting point “P”(D”for time delay)characteristic.See Clauses 6.1 and 9.2.
5 Characteristics
5.2 Voltage rating
For AC, the rating shall be 250 V ac or 600 v ac in accordance with dimensions shown in Figures A andB.
The DC voltage rating may be different from the AC rating.
5.3 current rating
Refer to Figures A and B for range of current ratings in each body size for each voltage rating.
5.5 Interrupting rating
For AC – 1 0,000 A
For DC – 1 0,000 A
6 Marking
6.1 Marking of fuses
In addition to the requirements in Part 1 : Fuses with a low melting point characteristic, for Canada, shall
be marked with a ″P″ or with a ″D″ for time delay.
g) The fuse shall not be marked ″Current Limiting.″
7 Construction
7.1 Dimensions
Fuse dimensions are shown in Figures A and B.
UL 248-6:2010 free download
