Page 29 - Fuse link Catalogue

CLASS L POWER FUSES

Available
Fault 601 800 1000 1200 1600 2000 2500 3000 4000 5000 6000
RMS AMPS RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip RMS Ip
10,000 7.4 17 8.7 20 10 23 10 23 10 23 10 23 10 23 10 23 10 23 10 23 10 23
15,000 8.3 19 10 23 12 27 13 30 15 35 15 35 15 35 15 35 15 35 15 35 15 35
20,000 9.1 21 11 25 13 29 14 33 17 39 20 46 20 46 20 46 20 46 20 46 20 46
25,000 9.8 23 12 27 13 31 15 35 18 42 22 50 25 58 25 58 25 58 25 58 25 58
30,000 10 24 13 29 14 33 16 37 20 45 23 53 29 66 30 69 30 69 30 69 30 69
35,000 11 25 13 30 15 35 17 39 20 47 24 56 30 69 35 81 35 81 35 81 35 81
40,000 12 27 14 32 16 37 18 41 21 49 25 58 31 72 36 83 40 92 40 92 40 92
50,000 13 29 15 34 17 40 19 44 23 53 27 63 34 78 39 89 48 111 50 115 50 115
60,000 13 30 16 36 18 42 20 47 25 57 29 67 36 83 41 94 51 118 60 138 60 138
80,000 14 33 17 40 20 46 23 52 27 62 32 73 40 91 45 104 57 130 67 153 77 176
100,000 16 36 19 43 22 50 24 56 29 67 34 79 43 98 49 112 61 140 72 165 83 190
150,000 18 41 21 49 25 57 28 64 33 77 39 90 49 112 56 128 70 160 82 189 94 217
200,000 20 45 24 54 27 63 31 71 37 84 43 100 53 123 61 141 77 176 90 208 104 239
The current limiting effect of A4BQ Class L fuses is presented in the table above. This table correlates actual fuse peak let-thru currents with equal
value peak currents reached in the first half cycle (worst case) of short circuits in unfused circuits. The let-thru current is expressed as "Apparent RMS
Symmetrical Amperes" in order to be more useful for practical applications. The currents are based on an assumed 15% power factor.
Example: An A4BQ1200, when applied in a circuit with 40,000 RMS symmetrical amperes available, will limit that current during a short circuit, to an
apparent 18,000 RMS symmetrical amperes. Under this condition, any equipment being protected would be subjected to only 18,000 RMS amperes.

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