70VA Isolation Electronic Toroidal Tansformer 230VAC To 24VAC
Features
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.
Specifications
| Item | Description |
| Capacity | 70VA |
| Frequency | 50/60Hz |
| Max. Temperature | 60℃ |
| Temperature rise | <60℃ |
| Insulation class | B/F |
| Voltage ratio | 230VAC-24VAC |
| Winding material | Copper |
| 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 |
| Rubber gasket | Provided |
| Standards | VDE0550/IEC204-1/IEC61558/EC439 |
| Warranty | 24monthes |
VA Calculation
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.
FAQ
1. Q: Can I have a sample order?
A: Yes, we welcome sample order to test and check quality.
2. Q: What is the lead time?
A: Sample time 3-7 days, we usually ship by DHL, UPS, FedEx,etc. Mass production time 7-25 days.
3. Q: How long is the warranty?
A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.
4. Q: Is OEM/ODM available?
A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.
Customized services:
a. Customized color and special function.
b. Customized box.
c. Print customer's logo(MOQ:≥10pcs).
d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.
5. Q: How to control the products quality?
A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.
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70VA Isolation Electronic Toroidal Auto Transformer 230VAC To 24VAC Images
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