Product Overview
XRNT High-Voltage Current-Limiting Fuse is suitable for indoor AC 50Hz systems with a rated voltage of 3.6–40.5kV. It can be used in conjunction with other switching electrical apparatus such as load switches and vacuum contactors, serving as a protective component for short-circuit and overload protection of power transformers and other equipment. It is also an essential accessory for high-voltage switchgear, ring main units and prefabricated high and low voltage substations.
Schematic Diagram of Product Structure
1. Overall and Mounting Dimensions (mm)
| Product Model | Rated Voltage (kV) | Fuse Breaking Current (A) | Breaking Capacity (kA) | Standard Dimensions (mm) | Remarks |
|---|---|---|---|---|---|
| XRNT | 3.6, 7.2, 10, 12 | 5, 6.3, 10, 16, 20, 25, 31.5, 40 | ≤ 50 | Φ51×292 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 3.6, 7.2, 10, 12 | 50, 63, 71, 80, 90, 100, 125 | ≤ 50 | Φ76×292 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 3.6, 7.2, 10, 12 | 150, 160, 200 | ≤ 50 | Φ88×292 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 20, 24 | 5, 6.3, 10, 16, 20, 25, 31.5, 40 | ≤ 50 | Φ51×442 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 20, 24 | 50, 63, 71, 80, 90, 100, 125 | ≤ 50 | Φ76×442 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 20, 24 | 125, 160, 200 | ≤ 50 | Φ88×442 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 35, 40.5 | 6.3, 10, 16, 20, 25 | ≤ 50 | Φ51×537 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 35, 40.5 | 25, 31.5, 40 | ≤ 50 | Φ76×537 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
| XRNT | 35, 40.5 | 50, 63, 71, 80, 90, 100 | ≤ 50 | Φ88×537 | (White, Brown)Porcelain TubeGlass Fiber Tube(Green) |
2. Selection Reference Table (Transformer Primary Voltage: 7.2kV)
| Transformer Capacity (kVA) | Fuse Rated Voltage (kV) | Fuse Current (A) |
|---|---|---|
| 100 | 7.2 | 20 |
| 125 | 7.2 | 20 |
| 160 | 7.2 | 25 |
| 200 | 7.2 | 31.5 |
| 250 | 7.2 | 40 |
| 300/315 | 7.2 | 50 |
| 400 | 7.2 | 71 |
| 500 | 7.2 | 80 |
| 630 | 7.2 | 100 |
| 750/800 | 7.2 | 125 |
| 1000 | 7.2 | 160 |
| 1250 | 7.2 | 200 |
3. Selection Reference Table (Transformer Primary Voltage: 7.2kV)
| Transformer Capacity (kVA) | Fuse Rated Voltage (kV) | Fuse Current (A) |
|---|---|---|
| 50 | 12 | 6.3 |
| 100 | 12 | 10 |
| 125 | 12 | 16 |
| 160 | 12 | 16 |
| 200 | 12 | 20 |
| 250 | 12 | 25 |
| 300/315 | 12 | 31.5 |
| 400 | 12 | 40 |
| 500 | 12 | 50 |
| 630 | 12 | 63 |
| 750/800 | 12 | 71/80 |
| 1000 | 12 | 100 |
| 1250 | 12 | 125 |
| 1500/1600 | 12 | 150/160 |
| 2000 | 12 | 200 |
4. Selection Reference Table (Transformer Primary Voltage: 7.2kV)
| Transformer Capacity (kVA) | Fuse Rated Voltage (kV) | Fuse Current (A) |
|---|---|---|
| 100 | 24 | 6.3 |
| 125 | 24 | 6.3 |
| 160 | 24 | 10 |
| 200 | 24 | 10 |
| 250 | 24 | 16 |
| 300/315 | 24 | 16 |
| 400 | 24 | 20 |
| 500 | 24 | 25 |
| 630 | 24 | 31.5 |
| 750/800 | 24 | 40 |
| 1000 | 24 | 50 |
| 1250 | 24 | 63 |
| 1500/1600 | 24 | 80 |
| 2000 | 24 | 100 |
| 2500 | 24 | 125 |
| 3150 | 24 | 160 |
| 4000 | 24 | 200 |
5. Selection Reference Table (Transformer Primary Voltage: 7.2kV)
| Transformer Capacity (kVA) | Fuse Rated Voltage (kV) | Fuse Current (A) |
|---|---|---|
| 50 | 24 | 2 |
| 100 | 24 | 3.15 |
| 125 | 24 | 5 |
| 160 | 24 | 5–6.3 |
| 200 | 24 | 6.3 |
| 250 | 24 | 8–10 |
| 315 | 24 | 10–12 |
| 400 | 24 | 12–16 |
| 500 | 24 | 16 |
| 630 | 24 | 20–25 |
| 800 | 24 | 25–31.5 |
| 1000 | 24 | 31.5–40 |
| 1250 | 24 | 40–50 |
| 1600 | 24 | 50 |
| 2000 | 24 | 63 |