When I power the attached circuit through the batteries, the circuit works nicely. When powered through the 40 VA transformer, the light and siren function very poorly. Is the following math correct (assuming 60% power factor)?
Amps= (VA* PowerFactor)/Volts
=(40*0.60)/13.9
=1.7 amps
If the calculated amps is correct, then why is the circuit having problems operating the light and siren which pull less than half (620 mA) the rated amperage?
Amps= (VA* PowerFactor)/Volts
=(40*0.60)/13.9
=1.7 amps
If the calculated amps is correct, then why is the circuit having problems operating the light and siren which pull less than half (620 mA) the rated amperage?