Hey guys, this is not really a DIY question but as there's some knowledgeable heads on here was hoping someone could assist.
got a motor circuit to select a starter/overload relay for.
The circuit consists of 3 (3 phase) motors on a radial circuit fed from a bs88 fuseboard. The starter/overload relay is currently missing hence the need to fit a new one. The motors are for extractor fans.
specs from the nameplate are voltage 380, amps 0.44, kw 0.245.
i need to select 1 starter and overload relay to protect all 3 motors as they cannot be put on seperate ones. im aware i do not have to give overload protection to the motors as they are under 0.37kw but i would prefer it anyway.
im having trouble selecting the overload i should use as im not sure of my total current. 0.44x3 =1.32A for all 3 motors. as my actual voltage is more likely to be 415v this will alter my current, perhaps outside the range of the 1.1-1.7 relay i was thinking of using.
any help on the calc or advice appreciatted as i must admit ive only ever worked on one motor per circuit.
regards.
got a motor circuit to select a starter/overload relay for.
The circuit consists of 3 (3 phase) motors on a radial circuit fed from a bs88 fuseboard. The starter/overload relay is currently missing hence the need to fit a new one. The motors are for extractor fans.
specs from the nameplate are voltage 380, amps 0.44, kw 0.245.
i need to select 1 starter and overload relay to protect all 3 motors as they cannot be put on seperate ones. im aware i do not have to give overload protection to the motors as they are under 0.37kw but i would prefer it anyway.
im having trouble selecting the overload i should use as im not sure of my total current. 0.44x3 =1.32A for all 3 motors. as my actual voltage is more likely to be 415v this will alter my current, perhaps outside the range of the 1.1-1.7 relay i was thinking of using.
any help on the calc or advice appreciatted as i must admit ive only ever worked on one motor per circuit.
regards.