B737 Classic Ammeter
 

The AC ammeters are labelled AMPERES, whyle the DC ammeter is labelled AMPS.

Why exactly the difference?

Is maybe AMPS = AMPeres per Second (if this makes any sense...)? :confused:

Thanks

Different Manufacturer.
See http://www.b737.org.uk/genbuspanel.jpg

Right!

Thanks, IFixPlanes.

Just wanted to add that batteries have a rating called Amp-Hours abbreviated AH.

Its all Jools's fault...
 

Amps = an abbreviation for Amperes. One Ampere = one Joule per second.

A Joule is that amount of energy required to displace a mass of one Newton by a distance of one Meter.

AH = Ampere Hours. Thus, 1 Ampere Hour = 3600 Joules - so now you know how much work your battery can perform.

In theory... ;)

Amp vs Amperes
 

No difference! It's current flow either way.

LEM's asking about AC - it's current flow both ways - innit? :bored:

Good one!:D

I think amps and amperes are the same thing - the first is an abbreviation of the second ... the difference comes when you talk about power - in DC systems power can be [and usually is ] expressed in watts - or - in aircraft - kilowatts [KW] which are amps times volts times a thousand. But in AC systems it depends on the phase relationship between the volts and amps and that is why power is often expressed in KVARs {Kilovolt amps Reactive]
I can't remember [it's 40 tears since I learnt this stuff]but I think KW=KVARS only if the AC volts and amps are 90 degrees out of phase

Amps=Amperes Something about not liking the French :}
KVA = Volts x Total Amps
KW realwork =KVA x power factor
Power factor= Cos (Phase angle)
If your Voltage and current are out by 90 degrees you have zero power factor and no real work been done. ie KVA=KVARS
Unity power factor is when voltage and current are in phase and all the incoming power is converted to real work. KVA=KW
KVAR is a measure of how well balanced your power system. It can also be an indicator of faults.