Xi'an Wuhuan Special Fuse Co., Ltd.,
Xi'an Wuhuan Special Fuse Co., Ltd
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Current Limiting Backup Fuse Links Sfldj-12 for Indoor 3.15A-200A Power System Protection
This product is suitable for indoor AC 50HZ, rated voltage 7.2KV-24KV power system, as transformer and other power equipment overload or short circuit protection components. And can be used with other protective appliances (load switch, vacuum contactor). This type of fuse can reliably break any fault current between 2.5-5 times the rated current of the fuse and 50KA under the specified service conditions.
1. Model and meaning:
| Domestic model | International model | Rating voltage(KV) | Current of fuse wire (A) | Size (mm) | Breaking current(KA) |
| XRNT1-12 | SDLDJ | 12 | 2, 3.15, 6.3, 10, 16, 20, 25, 31.5, 40, 50 | Ø51*292 | 50KA |
| SFLDJ | 12 | 50, 63, 71, 80 | Ø66*292 | ||
| SKLDJ | 12 | 100, 125 | Ø76*292 | ||
| SQLDJ | 12 | 160, 200 | Ø88*292 | ||
| SQLDJ | 12 | 224, 250, 315 | Ø88*442 | ||
| 12 | 315, 355 | Ø125*442 | |||
| XRNT1-24 | SDMDJ | 24 | 6.3, 10, 16, 20, 25, 31.5 | Ø51*442 | 50KA |
| SFMDJ | 24 | 40, 50, 63, 71, 80 | Ø76*442 | ||
| SQMDJ | 24 | 100, 125 | Ø88*442 | 40KA | |
| The insulating property of 12kv : phase to ground 42KV | |||||
| The insulating property of 24kv : phase to ground 60KV | |||||
| Fuse specification(mm) | L | A | B | C | D | H | G | F | Ød |
| XRNT1-12 | 292 | 450 | 322 | 150 | 454 | 160 | 483 | 203 | 13 |
| XRNT1-12 | 442 | 600 | 472 | 270 | 604 | 160 | 633 | 203 | |
| XRNT1-24 | 442 | 600 | 472 | 270 | 604 | 285 | 633 | 350 |
3. Time-current characteristic curve:
Xi 'an Wuhuan Special Fuse Co., Ltd. is a high-technology manufacturer company established by Wuhuan Electric Group in Xi 'an, Shaanxi Province, China's high voltage electric production base in 2000. It Mainly engaged in the development, design, manufacture, sales and service of fuses and other high voltage appliances. The main products of the company are high-voltage current limiting fuses, which are used in indoor 50HZ/60HZ power systems with rated voltage of 3.6-40.5KV. As American power transformer, Europe type power transformer, high voltage motor, voltage transformer, power capacitors and other electric equipment overload and short circuit protection, and in other appliances such as: load switch, vacuum contactor etc, protection circuit and complete sets of electrical equipment from damage by excessive overload current and short circuit current. The company has high-quality technical personnel, professional fuse manufacturing and testing equipment and advanced modern enterprise management concept, its product categories, production scale and sales revenue are growing at a high speed. Wuhuan Company implements ISO9001:2000 quality system standard, uses MCAD development and design, with the help of Intuitive ERP and advanced testing equipment to ensure the reliability of production and high quality products. All the products have passed the type test of the national high voltage electrical apparatus quality supervison and inspection center ,and are in line with the national GB/T15166.2 standard and IEC60282 standard of the International Electrotechnical Commission.