- Cut-out fuses are used in primary overhead feeder lines and taps to protect distribution transformers from current surges and overloads.
- An overcurrent caused by a fault in the transformer or customer circuit will cause the fuse to melt, disconnecting the transformer from the line.
- They can also be opened manually by utility linemen standing on the ground and using a long insulating stick called a "hot stick".
|Applied standard||IEC 60282-2|
|Rated system voltage||20 (kV)|
|Rated Continuous current||100 (A)|
|Lightning impulse withstand voltage||To earth , between poles and across the base 125 (kV)
Across the isolating distance of the fuse-base 145 (kV)
|Power-frequency withstand voltage||To earth , between poles and across the base 50 (kV)
Across the isolating distance of the fuse-base 60 (kV)
|Creepage distance||340 (mm)|