Hi All,
can anyone help?
So at work on the shop floor there are about a dozen weld bays all fed via a Busbar system, each bay has 1 double gang single phase 230v socket protected via NITD 20A fuses to BS88 (each socket is independently fused), the single phase sockets are generally used for the grinders various brands and occasionally a radio, the plug fuses in the grinders are 13A BS1362 as specified in the manuals for the grinders.
The NITD 20A BS88 fuses in the busbar outlet to the sockets blow on a regular basis (about 1 every 2 - 3 days) there is no pattern to this it can be any of the 12 bays.
They only blow when using the grinders, we have identified an issue of metal grinding dust contaminating the grinder and have implemented a weekly clean of the grinders inside.
I guess my question is why is it that it is always the 20A bs88 fuse always blows and never the 13a bs1362?
even though the manufactures of the grinders specify 13a fuses, we have tried down rating the plug fuse to 10a bs1362 and even then the 20a still goes first. It is far more effort in replacing the fuse on the busbar outlet than the plug fuse but in anycase need to eliminate it.
I have looked at the curves for bs88 fuses in BS7671 but cannot see any for the BS1362 to compare. any ideas???
thanks in advance for taking the time to read
Regards
Late
can anyone help?
So at work on the shop floor there are about a dozen weld bays all fed via a Busbar system, each bay has 1 double gang single phase 230v socket protected via NITD 20A fuses to BS88 (each socket is independently fused), the single phase sockets are generally used for the grinders various brands and occasionally a radio, the plug fuses in the grinders are 13A BS1362 as specified in the manuals for the grinders.
The NITD 20A BS88 fuses in the busbar outlet to the sockets blow on a regular basis (about 1 every 2 - 3 days) there is no pattern to this it can be any of the 12 bays.
They only blow when using the grinders, we have identified an issue of metal grinding dust contaminating the grinder and have implemented a weekly clean of the grinders inside.
I guess my question is why is it that it is always the 20A bs88 fuse always blows and never the 13a bs1362?
even though the manufactures of the grinders specify 13a fuses, we have tried down rating the plug fuse to 10a bs1362 and even then the 20a still goes first. It is far more effort in replacing the fuse on the busbar outlet than the plug fuse but in anycase need to eliminate it.
I have looked at the curves for bs88 fuses in BS7671 but cannot see any for the BS1362 to compare. any ideas???
thanks in advance for taking the time to read
Regards
Late