Can some one please explaine to me if possible how a static balancer works? I've seen a couple of these things installed at the end of long LV distributors but never been able to find how they work as far as I can tell they are just 3 windings connected in star but I've got no clue how they balance voltage.
The zig-zag winding secondary makes it a better balancer, and is less reliant on the magnetic paths being in perfect balance , but a simple 3 limb core will get you a good way just to begin with, and is far easier to describe.
They do both draw current off the highest voltage phase and stuff it back out in the right phase and power split to prop up the other two phases in proportion to their relative depression. (and as an aside to Alan's comment, sometimes it really is better if the other 2 fuses blow at the same time when one phase drops, depends on the sort of load.)
In the Isle of Man diagram, it makes it clearer once you realise the angles of the windings show the core limb they are on, so
the a to a' winding is wound over the N to b' one, and
the b to b' winding is over the N to c' one and
the c to c' is over the N to a'
the 3 limbs see a magnetisation pattern moved by 60 degrees but still do the 3 phase thing in terms of the total flux.
The zig-zag winding secondary makes it a better balancer, and is less reliant on the magnetic paths being in perfect balance , but a simple 3 limb core will get you a good way just to begin with, and is far easier to describe.
They do both draw current off the highest voltage phase and stuff it back out in the right phase and power split to prop up the other two phases in proportion to their relative depression. (and as an aside to Alan's comment, sometimes it really is better if the other 2 fuses blow at the same time when one phase drops, depends on the sort of load.)
In the Isle of Man diagram, it makes it clearer once you realise the angles of the windings show the core limb they are on, so
the a to a' winding is wound over the N to b' one, and
the b to b' winding is over the N to c' one and
the c to c' is over the N to a'
the 3 limbs see a magnetisation pattern moved by 60 degrees but still do the 3 phase thing in terms of the total flux.
