tim_callinan
Member
Im teaching a course in Motor control in about a month. I have a couple of questions about fuses if anyone can help me.
Im trying to show the students some examples of overcurrent protection.
We have a 1/3 HP 3 phase motor with a mechanical brake attached. Its possible to turn on the brake and have the motor current ramp up. The motor steady state current is about 1A per phase without any load but when I turn on the brake it can increase above 6 amps. The fuse holders we have and we can purchase different ones if its a better idea - hold a fuse around 10x38mm.
For whatever reason the midget fuses we got are around $20 per fuse in McMaster Carr. Essentially I want to turn on the brake - let the students see the current running above 5 amps or so and then hopefully the fuse will blow in a second or two. I made a quick video showing what Im trying to do.
Any advice or assistance is defo appreciated. Its not my money but I dont want the college paying twenty bucks per fuse!
https://www.youtube.com/watch?v=ZQ7CJ3z4ewE
Tim
Im trying to show the students some examples of overcurrent protection.
We have a 1/3 HP 3 phase motor with a mechanical brake attached. Its possible to turn on the brake and have the motor current ramp up. The motor steady state current is about 1A per phase without any load but when I turn on the brake it can increase above 6 amps. The fuse holders we have and we can purchase different ones if its a better idea - hold a fuse around 10x38mm.
For whatever reason the midget fuses we got are around $20 per fuse in McMaster Carr. Essentially I want to turn on the brake - let the students see the current running above 5 amps or so and then hopefully the fuse will blow in a second or two. I made a quick video showing what Im trying to do.
Any advice or assistance is defo appreciated. Its not my money but I dont want the college paying twenty bucks per fuse!
https://www.youtube.com/watch?v=ZQ7CJ3z4ewE
Tim