sparkymarky
Prominent Member
A servo i have recently purchased doesn't appear to like the electricity supply in my house.
I demo'd it at the previous owners house and it appeared to work fine. However turning it on in my house resulted in two blown fuses. These were 2.5 anti surge fuses, which i presume is standard issue.
I have replaced this with a 3.15 anti surge, which incidently and much to my relief appears to work fine, on the basis of the following thought.
The sub has a 400 watt rms amp. Therefore when turning on the amp, and when it draws the most current, it may draw the peak figure which (recollecting my days as an electrician!!) i would work out to be 565 watts. (rms/0.707=peak)
Therefore, 565/240v = 2.35A (p=VI) which is obviously close to the fuse rating.
With a slightly poor and uncontrolled mains supply maybe the supply could be at the 2.5 fuse rating for a period long enough to blow the fuse.
Anybody concur or disagree?
I am a little bit innebriated as i type so apolgies for typing/grammar
I demo'd it at the previous owners house and it appeared to work fine. However turning it on in my house resulted in two blown fuses. These were 2.5 anti surge fuses, which i presume is standard issue.
I have replaced this with a 3.15 anti surge, which incidently and much to my relief appears to work fine, on the basis of the following thought.
The sub has a 400 watt rms amp. Therefore when turning on the amp, and when it draws the most current, it may draw the peak figure which (recollecting my days as an electrician!!) i would work out to be 565 watts. (rms/0.707=peak)
Therefore, 565/240v = 2.35A (p=VI) which is obviously close to the fuse rating.
With a slightly poor and uncontrolled mains supply maybe the supply could be at the 2.5 fuse rating for a period long enough to blow the fuse.
Anybody concur or disagree?
I am a little bit innebriated as i type so apolgies for typing/grammar