10-12kV Porcelain Drop Out Fuse Cut Out
Porcelain Drop Out Fuse Cut Out
10-12kV
Description
Drop out fuses and load-drop fuses are outdoor high voltage protection appliances. They are installed on the high voltage side of the distribution transformer or on the branch line of the distribution line, used as a short circuit of the transformer and the line, overload protection and cut out load current.
Dropout fuse is composed of two parts: An insulating bracket and a fuse tube. The static contact is installed at two ends of the insulating bracket, the movable contact is installed at both ends of the fuse tube, and the fuse tube is composed of an inner arc extinguishing tube and an outer layer.
It consists of a phenolic paper tube or an epoxy glass tube. The load drop fuse enhances the elastic auxiliary contact and the arc extinguishing cover to divide and combine the load current.
Application
Generally, fuse cut-out contains following parts: (1) Insulator; (2) Metal parts; (3) Fuse tube; (4) Fuse element (link).
Connected with incoming feeder of distribution transformer or distribution lines, high-voltage drop-out fuse cut-out mainly protect transformer or lines form short circuit and overhead, and on/off loading current. Cut out fuse is composed of insulators and fuse tube/carrier. Static contacts are fixed on two sides of insulator support while moving contacts are installed on two ends of fuse tube/carrier. Fuse tube/carrier is composed of inner arc-extinguishing tube, outer phenolic compound paper tube or epoxy glass tube.
Covering rated voltages of 10 to 40.5KV for over current protection, fuse cut-out is divided in two types: Composite (Silicone rubber) type and Porcelain type.
Application environment
- Ambient temperature: -40 ~ +40℃
- Altitude above sea level: ≤3000m
- Maximum wind speed: ≤35m/s
- Earthquake intensity: ≤8 degrees
Specifications
| Rated Voltage (KV) | Rated Current (A) | Breaking current (A) | BIL (KV) | Power frequency withstand voltage (kV) | Creepage distance (mm) | Weight (kgs) | Dimension (cm) |
| 10-12 | 100 | 8000 | 110 | 40 | 250 | 5.5 | 46*36*9.5 |
| 10-12 | 200 | 10000 | 110 | 40 | 250 | 6 | 46*36*9.5 |
