UL 248-16:2000 pdf download Low-Voltage Fuses – Part 16: Test Limiters
1.1 Scope
This Part applies to test limiters calibrated to specific limits of peak let-through current and clearing 1% at250.300，480,or 600 V ac.
4 Classification
Test limiters are non-renewable and current limiting, with test current ratings up to 200,000 A. They arecalibrated to maximum peak let-through current and clearing 1 limits for the fuses specified in thisStandard and are used for withstand testing of equipment designed to accept those fuses. Body sizes arenot specified.
5 Characteristics
5.2 Voltage rating
For AC, the rating shall be 250, 300, 480, or 600 V ac
5.3 Current rating
No current rating is assigned to a test limiter except in reference to (and marked as) the ampere rating forthe fuse and classification it represents.
5.5 Interrupting rating
No interrupting rating is assigned to a test limiter. nstead a test current rating is assigned. See test currentrating,Clause 5.7.
5.6 Peak let-through current and clearing It characteristics
Values of peak let-through current and clearing i’t at rated voltage for each test limiter shall be equal toor greater than the maximum values which correspond to the voltage, ampere rating, and classification ofthe fuse it represents, when tested at its assigned test current rating.
5.7 Test current rating
For AC – 200,000 A, unless otherwise specified.
6Marking
6.1 Marking of fuses
A test limiter shall be marked with the fuse class it represents. ampere and voltage rating, assianed testcurrent rating, and the words “THIS IS NOT A FUSE” For example. “Class J Test Limiter: 30 A. 600 V:200.000 A: THIS IS NOT A FUSE.
7 Construction
7.1 Dimensions
Test limiter dimensions are not specified
8 Tests
8.4 Verification of operation at rated voltage
8.4.3 Test method
Test limiters shall be tested at rated voltage, rated test current for verification of peak let-through current.and clearing 1’t
Two samples of each rating shall be tested.

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