25VA to 6000VA Waterproof transformer with ABS fire Material

Qty (Piece/Pieces) Unit Price (USD)
100 - 499 6.15
500 - 999 15.00
1000 + 21.5
Payment Terms: T/T,L/C,D/A,D/P,WU,Paypal,Money Gram;cash
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Basic Info.
  • Brand Name: Grewin Encapsulated Waterproof Toroidal Transformer 
  • input: 0-240v 
  • output: 0-24v,12v+12v 
  • Usage:: underwater LED lighting,pool light,swimming pool lighting 
  • Phase: Single 
  • Coil Structure: Toroidal 
  • Coil Number: waterproof Toroidal Autotransformer 
  • type: Waterproof electronic epoxy resin 240v 20.83A 24V 500VA transformer 
  • Model number: Grewin LED Lighting Waterproof Toroidal Transformer 
  • frequency: 50-60hz 
  • Encapsulated by iron shell: CE, RoHS, SGS, CESI and ISO9001 
  • Model No.: epoxy resin toroidal transformer 
  • Place of Origin: Tianjin  
  • Min.Order: 100 Piece/Pieces
  • Means of Transport: Ocean, Air, Land
Supply Capacity
  • Production Capacity: 40000 pieces per month at last
  • Packing:Export standard carton or customize size carton with strong pallet
  • Delivery Date: 15 work days


25VA to 6000VA Waterproof transformer with round ABS fire Material cover for LED Lighting


100150va 200va 600va 700va 800va 4kva 5kva Waterproof isolation toroidal transformer
1.low magnetic leakage
2.with CE,UL

Waterproof electronic epoxy resin toroidal  transformer China




We have abtained VDE,UL,CE,ROHS,ISO9000 Approal and SGS Audit Supplier in China,

We guarantee quality is the first:


2.The following dimension is for the dimension of the round black cover waterproof toroidal transformer.


The model No. delegate different power(:eg: H-200 means for 200VA toroidal transformer.)


3.power range is between 25VA and 6000VA. 200va 600va 700va 800va 4kva 5kva Waterproof isolation toroidal transformer


4.Material: wire leads, screw , expoxy resin, round black color cover, 100% copper wire

and silicon core.


 5.Test conditions:

Safety Standard: EN61558-2-6

Insulation resistance test(type test):Pri.~sec. 500V DC 100 MΩ Min.

HI-Pot Test(100% test):Pass our dielectric strength test, without any breakdown

Pri.~sec. AC 3.75kV for 5 seconds (leakage current 5mA MAX)

Ta=25℃ Test by resistance method At rated load 4H .

PRI.& SEC. Windings' Temperature Rise 75℃

6.Major Measurement Facilities: 











Grewin' s  waterproof  transformers to be used light weight, highly energy efficient water-safe making them ideal for outdoor lighting,outdoor power supply etc.

  • Splash Proof protection from water in all direction

  • Approved safe with IP64 Rating for outdoor use

  • Fully water proof fuse designed to eliminate the possibility of an electrics shock (as defined in IEC standards 65 and 257)

  • Included is a special safety fuse which eliminates the possibility of electrocution.

  • 8.Advantages:
    (1)100% copper wire made
    (2).Toroidal style
    (3).plastic cover :ABS fire Material of withstand high temperatures
    (4).Epoxy resin
    (5).high performance insulation
    (6).Anti-corrosion, waterproof performance

    9.Main parameters:
    Input Voltage:AC 220V   230v 110v (Define the voltage)
    Output voltage:AC 12V / 24V       (Define the voltage)
    Power range:25VA-6.5KVA

    10.How to design Transformer ? 

  • Transformer capacity is rated in Volt-Amps (VA) which is generally the same as wattage 


    Most loads are labeled with their proper operational voltage (Volts), current (Amps), 


    frequency (Hz), and wattage (Watts or VA). When you need to design a transformer,


    we must know the mainly below parameters to be customized:GREWIN's Custom 


    Transformers ,plz kindly check attached file:


    GREWIN's Custom Toroidal Transformers 


    *Input volts:


    *Output volts:

    *VA rating:

    *Lead length:(inches)

    Maximum height:

    Maximum diameter:

    *Quantity required:

    Additional comments:





    1. Quality and honest first!


    A.  Flexible service for diffierent transformers with high efficiency performance.


    B.  Over 40 years experience of transformer designing and producing.
    C. 100% test of every single product we produce from incoming material checking.       
    D.  UL, CUL, CE, ROHS, ISO9001:2008
    E.  We offer custom-made transformers, OEM and ODM are welcome
    F.  We deliver the quality you expect at consistently competitive prices
    G. Transformer quality lifetime:10 Years.
    H. Specialty Sales service:5 -10 Years


    I.Transformers Test: 100% test before the shipment


    2.Wide Product range:


    (1) UL/CUL approved class 2 transformer, from 5VA to 100VA


    ( 2) CE, ROHS approved, EI, UI laminated encapsulated transformers, from


          0.35VA to 60VA


    (3)CE approved, AC(DC) to DC PCB mounted transformer (max power, 5VA), Pin


        layout is the same as EI30 transformers.


    (4) CE ROHS approved other toroidal transformer, power 50VA up to 10000VA


    (5) other EI laminated low frequency transformer, all meet ROHS requirements .


       (EI14, EI28   EI30 EI42 EI57 EI60 etc.)


    (6) High frequency ferrite core transformers :ETD EE EFD SMD PQ RM series.


    (9) Planar transformers, up to 6500VA


    (10)Current Transformer:


    split core current transformer, DC immune current transformer, PCB mounted current transformer, zero phase current transformer, precision current transformers, clamp on current transformer


    (11)toroidal inductors, SMD inductors, other inductors



    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


    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






    1. Installation:
    Wire leads mounting type with center hole.

    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.         


    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'.
    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: 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.)

    B.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.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:

    5.About us:

    Tianjin Grewin Technology Co.,ltd. has always placed great emphasis on our core

    business philosophy "Quality and Honesty First ". Due to continuous innovative

    research and development, technical standards and efficient.A professional leading

    and a main exporter of a wide variety of electronic components in China for many Years.



     6. Below is our toroidal transformer's catalogue with much advantages

    in our market: 

    7.Flow chart of trading activities:




    Days need


    Request for quotation

    1 day


    Making quotations

    1 day


    Offer and counter offer

    3 days


    Sending and receiving samples

    3-10 days


    Sample confirmation

    3 days


    Placing a firm order

    1 day


    Paying and receiving the down payment

    1-4 day


    Factory production & Quality inspection

    15-20 days


    Paying and receiving the balance

    4 days


    Delivery of goods

    1 days


    8.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.


    9.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.


    10.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.


    11.Contact Information:                                                   

    Contact Information:               

    Cathy Li 

    Tianjin Grewin Technology Co.,Ltd




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Ms. cathy li (sales)
Tel: 86-22-84943756
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Tianjin Grewin Technology Co.,Itd
Economic Building Dong Li District, Tianjin, China (Mainland) / 300181
Fax: 86-22-85909471
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