Dubuque, IA Free Moderated Classifieds Site > OLD ADS FROM PREVIOUS YEARS
> 2009
> January
> 460V ct / 230V 220VA toroid tube power amp transformer
460V ct / 230V 220VA toroid tube power amp transformer
Open Circuit Test (core loss test):
TEST CONDITION: Apply variable voltage to primary coil (115V terminals) from 115-140VAC at 60Hz. No load on secondary coils.
1. Primary V = 115VAC, Primary I = .02A or core loss is 2Watt.
2. Primary V = 140VAC, Primary I = .06A or core lost is 5Watt.
Short Circuit Test (copper loss test):
TEST CONDITION: Apply variable voltage to primary coil (115V terminals) from 1-20VAC at 60Hz and short circuit on secondary coils and test the primary voltage and current. The result is 8.6V and 1.72A or 7Watt which is the maximum rated copper loss
TEST CONDITION: Apply dielectric meter between primary coils and secondary coils; and increase voltage up to 3500VAC. No initiate any spark.
TEST CONDITION: Input 115VAC 60Hz to the primary coil; parallel 2 secondary coils, 50 ohm 50W resistors as dummy load and room temperature at 25 degree C.
1. Primary I = 0.02A, Secondary V = 236VAC at 0.0A, Power = 0 Watt
2. Primary I = 1.1A, Secondary V = 215VAC at 0.9A, Power = 200 Watt
Dimension – 4.7†Diameter x 2.5†High.
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