High-Voltage Current Limiting Fuse for Transformer Protection
| Price: |
Negotiable/Piece |
| Min Order: |
10/Piece |
| Pay Type: |
T/T |
This product applies to the indoor AC 50 ~ 60Hz system with the rated voltage of 3.6~40.5kV, and may be used along with other switching devices (such as load switch, vacuum contactor, etc.) as short-circuit and overload protection element for the power transformer and other power equipment. The product is also essential for the high-voltage switchgear, ring main unit, high/low-voltage pre-installed substation. ModelGB model:XRNT3A-/-50Overseas equivalent model: 
Outline dimensions
Fig.1 XRNT3A plug-in fuse link Basic parameters | Product Model | Equivalent Model | Rated Voltage
(kV) | Rated Current of Fuse Element (A) | Standard Size | Rated Breaking Current
(kA) |
| L(mm) | φA(mm) |
| XRNT3A-7.2 | SDODJ | 7.2 | 3.15, 6.3, 10, 16, 20, 25, 31.5, 40 | 192 | φ51 | 50 |
| SEODJ | 50, 63, 80 | φ66 |
| SFODJ | 100, 125 | φ76 |
| SXODJ | 160, 200 | φ88 |
| SDLDJ | 6.3, 10, 16, 20, 25, 31.5, 40, 50 | 292 | φ51 |
| SELDJ | 63, 80, 100 | φ66 |
| SFLDJ | 125, 160 | φ76 |
| SXLDJ | 200, 250, 315 | φ88 |
| SEMDJ | 100, 125 | 442 | φ66 |
| SFMDJ | 160, 200 | φ76 |
| SXMDJ | 250, 315, 355 | φ88 |
| XRNT3A-12 | SDODJ | 12 | 1, 2, 3.15, 6.3, 10, 12 | 192 | φ51 | 50 |
| SELDJ | 16, 20, 25, 31.5, 40 | φ66 |
| SFODJ | 50, 63 | φ76 |
| SDLDJ | 3.15, 6.3, 10, 16, 20, 25, 31.5, 40 | 292 | φ51 |
| SELDJ | 50, 63, 80 | φ66 |
| SFLDJ | 100, 125 | φ76 |
| SXLDJ | 160, 200 | φ88 |
| SDMDJ | 6.3, 10, 16, 20, 25, 31.5, 40, 50 | 442 | φ51 |
| SEMDJ | 63, 80, 100 | φ66 |
| SFMDJ | 125, 160 | φ76 |
| SXMDJ | 200, 250 | φ88 |
| XRNT3A-24 | SDLDJ | 24 | 2, 3.15, 6.3, 10, 12 | 292 | φ51 | 31.5 |
| SELDJ | 16, 20, 25, 31.5, 40 | φ66 |
| SFLDJ | 50, 63 | φ76 |
| SDMDJ | 6.3, 10, 16, 20, 25, 31.5, 40 | 442 | φ51 | 50 |
| SEMDJ | 40, 50, 63 | φ66 |
| SFMDJ | 63, 80 | φ76 |
| SXMDJ | 100, 125 | φ88 |
| SFQDJ | 63, 80, 100 | 537 | φ76 |
| SXQDJ | 125, 160 | φ88 |
| XRNT3A-40.5 | SDMDJ | 40.5 | 2, 3.15, 6.3, 10, 12 | 442 | φ51 | 31.5 |
| SDQDJ | 2, 3.15, 6.3, 10, 16, 20 | 537 | φ51 |
| SEQDJ | 20, 25 | φ66 |
| SFQDJ | 31.5, 40 | φ76 |
| SXQDJ | 50, 56, 63 | φ88 |
Main technical data 1. The fuse under specified operating conditions is able to reliably break any fault current from the minimum breaking current to the rated breaking current.2. This product applies to the indoor AC 50 ~ 60Hz system.3. Time - current characteristic curve, as shown in Fig. 2, Fig. 3 and Fig. 4, the part above the minimum breaking current is indicated with dotted line.4. Current limiting characteristic curve is as shown in Fig. 5.5. I2t characteristic curve is as shown in Fig. 6. 
Fig. 2 XRNT3A-12 time - current characteristic curve 
Selection of fuseGeneral selection principle for primary fuse of transformer | Rated Voltage (kV) | Rated Capacity of Transformer (kVA) | | |
| 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 |
| Rated Current of High-voltage Fuse (A) |
| 6/7.2 | 16 | 20 | 20 | 25 | 31.5 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 250 |
| 10/12 | 10 | 16 | 16 | 20 | 25 | 31.5 | 40 | 50 | 63 | 80 | 80 | 100 | 125 | 160 |
| 15/17.5 | 6.3 | 10 | 10 | 16 | 16 | 20 | 25 | 31.5 | 40 | 50 | 80 | 80 | 100 | 125 |
| 20/24 | 6.3 | 10 | 10 | 10 | 16 | 16 | 20 | 25 | 31.5 | 40 | 50 | 63 | 80 | 100 |
| 35/40.5 | 3.15 | 6.3 | 6.3 | 6.3 | 10 | 10 | 16 | 16 | 20 | 25 | 31.5 | 40 | 50 | 56 |
Outline drawing of non-standard fuse link 
| Prod Model: |
XRNT3A |
| Breaking Capacity: |
High |
| Type: |
Current Fuse |
| Usaga: |
High Voltage |
| Fusing Device: |
Link Break |
Founded on March 7, 1998, Shaanxi Zhenli Electric Power Technology Co., Ltd. (formerly known as Xi'an Zhenli Fuse Co., Ltd. ) was located in F4-402 Lutong Industrial Park, East Section of Kuangshan Road, East Er'huan, Xi'an with the industrial plants covering 1771.08 square meters. As the company business gradually expanded, it was moved to No 2055, Shanglinyuan No. 5 Road, High-tech District, Xi'an in 2017, with three self-built standard plants covering 20847.26 square meters and a total of 80 staff including 8 research staff, 6 professionals and 6 product designers. As required by High-tech District of Xi'an, the company was restructured into Xi'an Xiangyuan Zhenli Electric Co., Ltd., a high-tech enterprise specialized in research and development, production and sales of indoor and outdoor fuses whose production scale and technical level lead the industry in China. So far, the number of fuses running in the power grid in the world is more than 3 million and the company has rich experience of line operation. Its products cover the voltage within 3.6~40.5kV and the current within 0.2A~315A. Its main products belong to new-energy wind-photovoltaic power hybrid power generation system strongly supported and developed by the nation. Currently, its main clients are Schneider, ABB, TBEA, Shandong Taikai, Jiangsu Huapeng and other Top 500 enterprises in the world and listed companies in China. The products are sold as far away as Portugal, Thailand, Mexico, Pakistan and other countries.
