Industrial Control Transformers
Fuse Protection
Primary Fusing to Meet CE
Recommended Fuse Sizes for the PRIMARY (use time delay fuses) for CE Applications
CE VA Rating |
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120 V | 208 V | 240 V | 277 V |
| 380 V | 416 V | 480 V | 600 V | |
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25 | 1/2 | 3/10 | 2/10 | 2/10 |
| 1/10 | 1/10 | 1/10 | 1/10 |
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50 | 1 | 6/10 | 1/2 | 4/10 |
| 3/10 | 3/10 | 2/10 | 2/10 |
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75 | 8/10 | 6/10 | 6/10 |
| 4/10 | 4/10 | 3/10 | 3/10 | |
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100 | 2 | 1 | 8/10 |
| 6/10 | 6/10 | 1/2 | 4/10 | |
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150 | 3 |
| 8/10 | 8/10 | 6/10 | 6/10 | |||
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160 |
| 1 | 8/10 | 8/10 | 6/10 | ||||
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200 | 4 | 2 |
| 1v1/8 | 1 | 8/10 | |||
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250 | 3 | 2 |
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300 | 4 | 3 |
| 1- 8/10 | |||||
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500 | 4 |
| 3 | 2 | |||||
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630 | 10 | 6 | 5 |
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1000 | 12 | 8 | 6 |
| 4 | 4 | 4 | ||
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1500 | 15 | 12 | 10 | 9 |
| 6 | 5 | 4 | |
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2000 | 20 | 12 | 12 | 12 |
| 8 | 8 | 5 | |
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3000 | n/a | 30 | 25 | 20 |
| 15 | 15 | 12 | 12 |
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NOTE: Recommended fuse sizes according to testing, EN
Secondary Fusing to Meet NEC and CE
Recommended Fuse Sizes for the SECONDARY to Meet NEC and CE
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| 120 Volts |
| 240 Volts | |||
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| Secondary |
| Fuse Rating | Secondary |
| Fuse Rating | Secondary |
| Fuse Rating | |
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| Current Rating | Current Rating | Current Rating | ||||||
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25 |
| 1.04 |
| 8/10 | 0.21 |
| 3/10 | 0.10 |
| 15/100 |
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50 |
| 2.08 |
| 3 | 0.42 |
| 6/10 | 0.21 |
| 3/10 |
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75 |
| 3.13 |
| 5 | 0.63 |
| 1 | 0.31 |
| 1/2 |
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100 |
| 4.17 |
| 6 | 0.83 |
| 0.42 |
| 6/10 | |
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150 |
| 6.25 |
| 10 | 1.25 |
| 2 | 0.63 |
| 1 |
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200 |
| 8.33 |
| 12 | 1.67 |
| 0.83 |
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250 |
| 10.42 |
| 15 | 2.08 |
| 3 | 1.04 |
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300 |
| 12.50 |
| 20 | 2.50 |
| 4 | 1.25 |
| 2 |
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350 |
| 14.58 |
| 20 | 2.92 |
| 5 | 1.46 |
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500 |
| 20.83 |
| 30 | 4.17 |
| 7 | 2.08 |
| 3 |
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750 |
| n/a |
| n/a | 6.25 |
| 10 | 3.13 |
| 5 |
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1000 |
| n/a |
| n/a | 8.33 |
| 12 | 4.17 |
| 7 |
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1500 |
| n/a |
| n/a | 12.50 |
| 15 | 6.25 |
| 10 |
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2000 |
| n/a |
| n/a | 16.67 |
| 20 | 8.33 |
| 12 |
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NOTES:
•Recommended fuse sizes according to NEC Article
•Secondary select protection at 125%, if a standard size rating is not available, go to next higher standard size rating.
•Current rating is less than 9 A, select protection at not more than 167%.
41
08/2005 |
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