Profilux II plus aquarium controller

[Matthias Gross]

Hi All,

a generic hint for all digital powerbar users.
We had now 2 customers who wondered why there is no power on the socket although the LED was on.
There was the fuse blown. This is no big problem, it can be replaced.
But it can be avoided if the max. allowed current is not exceeded.

Example: Max. current for socket 1 is 8A.
That means: Max. Power = Max. current x Voltage.
In the USA: = 8A x 110V = 880W

Now we have 2 x 400W MH and first we think that should be OK - wrong!
The 400W is only the power of the bulb - not including the power dissipation of the ballast. Assuming the power lost of the ballast is 30% we can calculate (approx.):
Power = 2 x 400W x 1.3 = 1040W -> Current = 1040W/110V = 9.5A -> Too much for the fuse!

Solution: split the MH to several sockets.

Please have a look to the specification plate or datasheet of your lamp, the overall current should be mentioned there.