- Reaction score
- 1,597
Hi all,
Today i have been working on a small pumping station. One of my jobs was to look at the discrimination between two sets of fuses. I open up both sections of the panels, and have a look. I see whats happened and decide on my course of action. (63A fuses feeding 100A fuses, so the second set are redundant, and im gona put solid links in instead).
I didnt have the links on me, so i measured up for them and then renergised the switchfuse. The lights dont turn on, and im getting a phase failure alarm on the panel. I check power to the first sw/f and its ok. I check the loads side of that S/f and its ok. Chjeck the live side of the downstream sw/f, and again ok. Check the load side, and L1 is down. I turn the power off, and im getting continuity on the fuse. Im a little bewildered by this. I decide that beofre anything else, im gona check any terminations id done that day. all ok. I decide to have a proper look at the offending fuse, so i go to unbolt it. The bloddy thing only needed half a turn on my socket, and it fell out. The panel firm who installed the pane ldidnt tighten up the fuse, or check it!!!! Its a good job that the gear trhe panel was feeding hasnt been running for months, or else we would have had a fire!!!!!
I reinstalled the fuse and tightened it up, and everything was hunky dory!!! Its lucky that it went open circuit really, because i had no reason to check the fuse until i remove it to install solid copper links.
Today i have been working on a small pumping station. One of my jobs was to look at the discrimination between two sets of fuses. I open up both sections of the panels, and have a look. I see whats happened and decide on my course of action. (63A fuses feeding 100A fuses, so the second set are redundant, and im gona put solid links in instead).
I didnt have the links on me, so i measured up for them and then renergised the switchfuse. The lights dont turn on, and im getting a phase failure alarm on the panel. I check power to the first sw/f and its ok. I check the loads side of that S/f and its ok. Chjeck the live side of the downstream sw/f, and again ok. Check the load side, and L1 is down. I turn the power off, and im getting continuity on the fuse. Im a little bewildered by this. I decide that beofre anything else, im gona check any terminations id done that day. all ok. I decide to have a proper look at the offending fuse, so i go to unbolt it. The bloddy thing only needed half a turn on my socket, and it fell out. The panel firm who installed the pane ldidnt tighten up the fuse, or check it!!!! Its a good job that the gear trhe panel was feeding hasnt been running for months, or else we would have had a fire!!!!!
I reinstalled the fuse and tightened it up, and everything was hunky dory!!! Its lucky that it went open circuit really, because i had no reason to check the fuse until i remove it to install solid copper links.