Remark:
A. D refers to the volume of a corresponding transformer, which will be replaced with a digit. For the transformer with a single winding, the corresponding max. Volume can be reached; For the transformer with two or more windings, the corresponding volume will be reduced properly.
B. Being a tendency of future pin transformer, it is applide with our best self-made toroidal core (Po≤0.9W/Kg) in the result of High Efficiency, Low Power Loss and Low Temperature-rise to be Green, Energy-saving & Environment-friendly.
C. Attributed to our Patent Technology, excluding the pins distribution mentioned above, the pins distribution can be freely adjusted by following customer's advice.
D. Nice Appearance, Small Size, Moisture Proof & Mould Prevention.
E. Pins Quantity can be reduced or increased based on your requirement.
Minature Transformers:
The dimension of the Control Transformer Usage &Toroidal Coil Structure step-up auto-transformator 380V to 200V
The Partial List of GW-B Series Toroidal Transformers with Cable and Mounting Holes:
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. 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
4. 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'.
5. Certificate
We have abtained CE CQC RoHs UL ISO9001: 2015, SGS and IEC approval. We guarantee quality is the first.
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.
Application:
1). Audio equipment
2). Electric control
3). Computer
4). Instrument
5). Telecommunications
6). High-end and middle-end vedio etc
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. )
About us:
1. Tianjin Grewin Technology Co., ltd. Has always laying great emphasis on our core business philosophy "Quality and Honesty First ".
2. Flow chart of trading activities:
| NO | Step | Days need |
| 1 | Request for quotation | 1 day |
| 2 | Making quotations | 1 day |
| 3 | Offer and counter offer | 3 days |
| 4 | Sending and receiving samples | 3-10 days |
| 5 | Sample confirmation | 3 days |
| 6 | Placing a firm order | 1 day |
| 7 | Paying and receiving the down payment | 1-4 day |
| 8 | Factory production & Quality inspection | 15-20 days |
| 9 | Paying and receiving the balance | 4 days |
| 10 | Delivery of goods | 1 days |
