Name:

40va Copper Wire Good Quality  audio toroidal transformer 

(1).   We have abtained VDE,UL,CE,ROHS,ISO9000 Approal and SGS Audit Supplier in China,We guarantee quality is the first.

2. technical parameters

related products

1. Installation:
Horizontal (non-conventional-type base plate), sunk, side type, and bridge.

2.   Application: 

Especially low-hum and low-dispersing construction
Low-level of induction
High-grade design casing possible
Statically shield winding and magnetical shield winding optional .

Be used widely such as audio equipment,communication,new energy areas,Electrical control,Cable TV network etc.        

3.Advantages:

1. More than 3 years of experience in medical equipment marketing

2.  With a full range of products, we are sure that you will find what you need  3.Leading medical equipment industry, we can provide you with the most advanced products  

4. Cooperated widely with other enterprises in medical equipment industry over the years, we have

accumulated a lot of experience; we will provide more professional and thoughtful service to 

satisfy the needs of customers.

5. Providing comparative price and high quality products, so far, our company have cooperated 

with many customers from over 50 countries and gained good reputation at home and 

abroad

4.  10-20khz audio toroidal transformer and cable TV transformer

Manufacture Equipment:
Over 50 sets toroidal/annular/ ring coil winding machines, 3 EI type transformer lines, 2 sets of vacuum annealing furnaces, A set of nitrogen and hydrogen production equipment as below:
. Automatic Winding Machine
. Semi-automatic Winding Machine
. Toroidal Winding Machine
. Insert Lamination Machine
. Wave Soldering Machine
. Plastic Termal Ultraviolet Machine
. Domino Ink Jet Printing Machine

 Transformer Multitester for High & Low Frequency
 Layer Insulation Withstand Voltage Tester

5.Warning
Under no circumstances should both ends of the fixing bolt simultaneously contact the metal chassis or framework as this would create a potentially dangerous 'shorted-turn'.

6.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.

7.GREWIN'S Dimension : External diameter: 55mm-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.)

8.Dual 110V Power Transformer:

For the international market request, these types of the GREWIN Transformers are designed into dual primaries for 110V. No matter what about your local voltage is 110V or 220V, you should use them. Below are the methods for using:
1. If you are using 110VAC(such as Taiwan, US), Please parallel the two primaries 110V. Please pay attention to the terminals of 110V must be short circuit, and the terminals of 0V must be short circuit.

2.If you are using 220VAC(such as Hongkong, China Mainland, Europe), Please series the two primaries.  Please pay attention to one terminals of 0V must be short circuit with another terminals of 110V.

(3). product procedure 

GREWIN has various kinds of state-of-the-art equipment, which are used in production, sampling and testing. Our equipments enable us to produce good quality products efficiently.

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

(4)Test process

 1  .No-load test (included no-load voltage,no load current and no load loss)

 2.iInductive voltage test 

 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.

 About us:

 1. Tianjin Grewin Technology Co.,ltd. has always laying great emphasis on our core business philosophy "Quality and Honesty First ". Due to continuous innovative research and development, our products have meet the technical standards and safety standards , which are efficient and environment-friendly. As a professional leading and a main exporter of a wide variety of electronic components in China for many years, we adhere to new products, quality to meet the needs of you and welcome all of you to negotiate

2.Flow chart of trading activities:

3.Acceptance of the Conditions:

All orders accepted by GREWIN are subject to the general sale conditions herein set forth, which are understood and accepted by the Purchaser when passing the order and/or upon receipt of GREWIN invoices. Other conditions as well as any verbal agreement are considered valid only if specifically confirmed by GREWIN in writing.

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.

5.Sample terms:

(1). Samples will be sent subject to advance payment to cover the courier charge and samples charge.

(2). You are pleased to instruct your courier company to pick up samples in our TianJin, China office at your expenses. For pick-up details, please advise your courier company to contact us.

(3). Delivery time 3-10 working days.