|Primary Voltage:||230VAC||Secondary Voltage:||24VAC|
|Frequency:||50Hz Or 60Hz||Type:||Dry Type|
|Name:||Toroidal Power Transformer||Insulation:||B/F/H|
70VA toroidal auto transformer,
Dry type low voltage transformer,
toroidal auto transformer 230VAC To 24VAC
70VA Isolation Electronic Toroidal Tansformer 230VAC To 24VAC
1).A toroidal transformer weights and temperature rise about half as much as conventional transformer with the same capacity.
2).No impregnation is needed to keep the laminates quiet so this potential environmental hazard is avoided.
3).The toroidal transformer fits into a smaller space, which allows chassis plates and enclosures to be smaller with less material used.
|Insulation Resistance||PRI.-SEC.: 500V DC 100 MΩ/Primary to Secondary 500VDC 100MΩ Min.|
|Short-Circuit of winding turn||PRI. Iput: 440V AC 150HZ/ Primary and Secondary Not break down)|
|Hi-Pot Test||PRI.-SEC.: 4.2KV/5mA/2S / Primary and Secondary Not break down )|
|Mounting metal plate||Provided|
1. Read the transformer’s secondary winding rating (printed or tagged on the transformer case). This should give a rating such as 5V, 500mA.
Multiply the voltage times the current to receive the VA.
Example: 5V times 500mA (or 0.5A) equals 2.5VA
2.Convert the secondary winding VA value to the primary winding VA rating as the equation VA (Primary) equals VA (Secondary) or VA (p)=VA(s)
For example of a 2.5VA secondary, if the primary voltage is 120V the current will be A (p) = VA(s) / V(p). Giving A(p) = 2.5 / 120 = 0.020833(roughly 21mA).
This is the calculation for a single input winding/single output winding transformer.
3. Add the separate VA ratings for a transformer with multiple secondary windings.
For secondary winding 1 = 5VA at 500mA
Secondary winding 2 = 24V at 100mA
Total Secondary VA = ( 5 X 0.5 ) + ( 24 X 0.1 ) = 4.9VA
Primary VA will still equal the total secondary VA.