We have passed ISO9001:2015,CE,CB,SGS approval and IEC report

GW-I Series: High Quality Encapsulated Toroidal Transformers with Pins        
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:

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:

Contact Information:       
Amy

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