with ISO9001: 2015 High Efficiency Audio Toroidal Transformer for Audio Device transformer

3). Load test (load voltage and temperature rise

4). Temperature rise test .

5).Insulated resistance 

6).Hi-pot test 

7).Leakage indutance test 

8).DC resistance test 

9).Surface inspection.

3.Application:

1).audio equipment 
2).electric control
3).computer
4).solar device
5).telecommunications
6).high-end and middle-end vedio etc

4.Advantages:

1).High quality 100% copper core
2).a full range of toroidal transformer

3).Specially sales and technical services:5-10Years
4).With 14 years' producing history in transformer induatry
5).our company have cooperated with many customers around the world and gained good reputation at home and abroad.

5.Note 
The above-mentioned toroidal transformer is frequently-used, we can also manufacture the products by customer design. And the specification is for reference, if has the change further, please take the material object as the standard. 

6.GREWIN'S Dimension :
External diameter: 40mm-300mm, height :13mm-130mm, Efficiency: 75-98% 
we can design the appropriate products according to customers' requirments such as installation dimension, input and output voltage,power...etc.)

About us:

1.Tianjin Grewin Technology Co.,ltd. has always laying great emphasis on our core business philosophy "Quality and Honesty First ". 

2.The following picture showed you about all finished toroidal transformer production line and package with export standard carton and strong pallets:

3.Terms of Shipment:
Within 10 working days after received related prepayment or L/C.

4.Payment terms:
(1). T/T 100% or 50% deposit by T/T in advance, balance amount to be paid 7 days before delivery.
(2). By irrevocable L/C at sight, to be issued immediately against confirmed order.
(3). Payment by T/T, if order amount is less than USD 20,000.

Contact Information:       

Joanna

Tianjin Grewin Technology Co.,Ltd.
Website:
Tel:86-22-84943756 

email:sales1(at)