Sealed Lead Batteries

[Pierre Desjardins]

Hi folks

I plan to use two Yuasa NPO.8-12 12v 0.8Ah gelcells for portable radio
amateur rig..

I will use them in France where power is 50 Hz. I see that chargers
available here in Canada always specify 60 Hz.

So, do I have to expect some problems?

Thanks

Pierre

 

[Rich Grise]

Pierre Desjardins wrote:

Hi folks

I plan to use two Yuasa NPO.8-12 12v 0.8Ah gelcells for portable radio
amateur rig..

I will use them in France where power is 50 Hz. I see that chargers
available here in Canada always specify 60 Hz.

So, do I have to expect some problems?

It doesn't make any sense to ship something that heavy, only to find

that it won't work properly. Just leave it, or sell it of you're moving
permanently, and get a charger when you get there.

Cheers!
Rich

 

[Gene]

In Canada the residential line voltage is 110V/60Hz while in France is
220V/50Hz so there are two problems:

1. The voltage difference must be addresses by a step-down transformer 220V
to 110V.
2. The lower frequency will attempt to increase the magnetic flux of the
transformer inside the charger, but its core will be pushed into saturation
causing overheating. Remember the formula: Vp (RMS) = 4.44 x F x Np
x PHIm? From this derives the rule that the ratio voltage/frequency has to
be kept constant to obtain the same flux.

One could have a transformer with a lower secondary voltage to avoid
saturation, say 110 x 60/50 = 91.7V but then the charger will not have
enough voltage to charge the battery.

Conclusion: As well said by Rich Grise, don't bother taking it to France.

Gene

 

[JeB]

On Sat, 28 Aug 2004 00:57:33 -0400, Pierre Desjardins
<pierred1@sympatico.ca> wrote:

Hi folks

I plan to use two Yuasa NPO.8-12 12v 0.8Ah gelcells for portable radio
amateur rig..

I will use them in France where power is 50 Hz. I see that chargers
available here in Canada always specify 60 Hz.

So, do I have to expect some problems?

If I understand your question ... you will probably need to buy a small
charger once you get to France.