Is yr 250watts MH really drawing 250watts?

Seldom logged into this forum, just happened to saw this thread. My ballast manufacturer actually specified the size of the caps to use. I am using 250W and the specified cap value is 32 micro farad. MKP type, which is metallised pp, not the oil type.

Originally Posted by BarraCuda™

Nope, I did not reduce the current intake. All I did is to correct the powerfactor by changing the impedence. The reactive power will counter with the apparent power to shift the powerfactor closer to 1.

The actual intake is 380watts while the bulb only consume 250watts .. so where the excess power go? It goes into heating the ballast and wiring.

The reason why I did not aim for a PF 1 its because the ballast, ignitor and capacitor also consume power, if you over do it .. the PF will be reduced.

[BarraCuda™]

Originally Posted by aws

Seldom logged into this forum, just happened to saw this thread. My ballast manufacturer actually specified the size of the caps to use. I am using 250W and the specified cap value is 32 micro farad. MKP type, which is metallised pp, not the oil type.

that is the probelm, different ballast got different requirements and efficiency .. thus the shunt capacitor have to be measured and calculate on a case by case basis.

wow very interested in this!
hey boss so to reduce the power used,i need to change the ballest?

Originally Posted by ReDDeviLs

wow very interested in this!
hey boss so to reduce the power used,i need to change the ballest?

Bro I think is the capacitor that need to be change not the ballast.

where will it be located? sorry man im an idiot in this.
the elect bill is killing me,its the main reason stopping me for a chiller! arhg!!

Hi barra? if eballast is use, will the efficiency level increase? cause eballast produce less heat and it uses electrical parts to drive the lamp compare to metal ballast uses coil...

[BarraCuda™]

Originally Posted by jellyfish

Hi barra? if eballast is use, will the efficiency level increase? cause eballast produce less heat and it uses electrical parts to drive the lamp compare to metal ballast uses coil...

yes .. the efficiency of eballast is definitely better than iron core ballast. I'm currently awaiting some replies from singapore power

Originally Posted by BarraCuda™

yes .. the efficiency of eballast is definitely better than iron core ballast. I'm currently awaiting some replies from singapore power

say boss,

so do u know which type of equipments is having wastage?
is arcadia MH 110cm one of them?
and Resun CL280?

[BarraCuda™]

Originally Posted by slcw

say boss,

so do u know which type of equipments is having wastage?
is arcadia MH 110cm one of them?
and Resun CL280?

I'm not sure of that .. unless actual measurements are taken.

i think most of them have wasteage..just that alot or little?