Why OEM Buyers Choose ECKO for Waterproof Transformer Projects
Application-Based Engineering
We review the load type, duty cycle, cable distance, ambient temperature, installation zone and target safety requirements before finalizing the transformer. This helps avoid incorrect VA selection, excessive temperature rise and unstable output voltage.
Electrical and Mechanical Design in One Project
The transformer winding, magnetic core, enclosure, resin, cable gland and mounting structure are developed as one complete assembly. This is especially important when IP protection and thermal performance must be achieved at the same time.
Controlled Design Documentation
Input, output, wire size, protection components, dimensions, cable pinout and label information are recorded in the approved drawing. Engineering changes can therefore be reviewed and controlled before they enter production.
Waterproofing Beyond an Outer Coating
A reliable waterproof design depends on the resin, housing, cable jacket, cable entry, strain relief, curing process and installation method. ECKO evaluates these details instead of relying only on an external waterproof label.
Prototype and Production Capability
Established in 2000, ECKO operates three workshops covering approximately 5,000 square metres with 150 skilled workers and annual capacity of around one million wound-component products Prototype lead time can be as fast as 1–3 days when the required materials are available.
Technical Support from Sample to Mass Production
Customers can confirm electrical performance, dimensions, cable assembly, label and installation fit with a prototype before production. Inspection requirements and project-specific test reports can be agreed during sample approval.
Quality Testing
Waterproof Transformer Inspection and Validation
Routine electrical tests and design-validation tests serve different purposes. The final test limits and inspection frequency should be recorded in the approved specification or Control Plan.
| Test Item |
Purpose |
Recommended Frequency |
| Visual and Dimensional Inspection |
Confirms housing, label, cable, mounting and workmanship |
100% |
| Winding Continuity |
Detects open circuits and incorrect connections |
100% |
| Turns Ratio / No-Load Voltage |
Confirms input-to-output voltage ratio |
100% |
| No-Load Current |
Checks magnetic design and assembly consistency |
Routine or agreed sampling |
| Winding Resistance |
Verifies winding consistency and conductor condition |
Routine or agreed sampling |
| Hi-Pot Test |
Verifies dielectric isolation between windings and accessible parts |
100% when included in the approved Control Plan |
| Insulation Resistance |
Checks insulation condition and moisture-related leakage |
Routine or agreed sampling |
| Ground Continuity |
Confirms protective earth connection on applicable metal housings |
100% where applicable |
| Load Voltage Test |
Confirms output voltage under the specified load |
Sample and lot verification |
| Temperature-Rise Test |
Validates thermal performance at rated load and ambient condition |
Design validation or type test |
| Thermal Protector Test |
Confirms the selected protector and trip requirements |
Component and sample verification |
| IP / Water-Ingress Test |
Validates the complete enclosure and cable-entry design |
Type test or project-defined sampling |
| Potting and Curing Inspection |
Checks resin fill, surface condition and curing consistency |
Visual inspection plus batch control |
| Final Functional Test |
Confirms correct wiring, polarity and operating performance |
100% or agreed Control Plan |
Quality Statement:
Every shipment follows the approved product specification. Test records, inspection reports or project-specific validation data can be discussed during the quotation and sample-approval stage.
From Application Requirements to Production-Ready Waterproof Transformer
Step 1 — Application Review
Send the input voltage, output voltage, rated current, load type, cable distance, ambient temperature, IP requirement and installation information.
Step 2 — Engineering Evaluation
ECKO evaluates transformer capacity, winding design, voltage regulation, temperature rise, insulation, protection components, enclosure and cable assembly.
Step 3 — Quotation and Drawing
You receive a commercial quotation together with the proposed electrical and mechanical specification. Key parameters are confirmed before prototype production.
Step 4 — Prototype Manufacturing
A custom sample is manufactured using the agreed materials and construction. Sample lead time can be as fast as 1–3 days for suitable projects with available materials.
Step 5 — Sample Verification
The customer checks electrical performance, dimensions, mounting, cable connections and operation with the actual equipment. Any required changes are reviewed before approval.
Step 6 — Pilot Run and Mass Production
After sample approval, production follows the confirmed drawing, materials and inspection requirements. A pilot quantity can be arranged when additional validation is required.
Step 7 — Final Inspection and Delivery
Finished products are inspected and packed according to the agreed specification. Carton, pallet, private-label packaging and export documentation can be customized.
Start Your Waterproof Transformer Project
Send us your transformer label, drawing, wiring diagram, load information or an existing sample. Our team will review the requirements and propose a suitable custom solution.
Waterproof Transformers FAQ
These questions address model selection, IP ratings, potting, cables, thermal design, pool applications and production testing in more detail than a general transformer category page.
1.What is the difference between a waterproof transformer and an encapsulated transformer?Encapsulation describes the construction method: the magnetic assembly is surrounded by resin or another compound. Waterproof performance is a verified ingress-protection characteristic of the complete product, including housing, joints and cable entries. An encapsulated transformer should not be called IP67 unless that exact construction has been assessed accordingly.
2. What is the practical difference between IP65 and IP67?
No. IP67 normally describes temporary immersion under specified conditions; it is not a continuous-submersion rating. Permanent underwater operation requires a purpose-designed product, defined depth and duration, suitable cables and materials, and the appropriate validation or IP68 conditions.
3. Does IP67 mean the transformer can operate underwater permanently?
Define the input condition, load current, load type, frequency and whether tolerance applies at no load or rated load. A realistic tolerance prevents unnecessary oversizing. If the downstream circuit includes a rectifier and regulator, specify the minimum DC voltage needed at worst-case mains and load.
4. Can the transformer be installed inside a swimming pool?
Only a model explicitly designed, approved and installed for that location should be considered. Pool installations are governed by local electrical codes, safety extra-low-voltage requirements, separation zones, earthing and equipment rules. Many pool-light transformers are installed in a protected location outside the water while supplying low-voltage fixtures.
5. Can you customize both input and output voltage?
Single or multi-tap inputs and one or more AC outputs can be designed. Provide the minimum, nominal and maximum input, frequency, each output voltage and current, and whether the target voltage is required at no load or rated load.
6. Can you provide 12 V, 24 V, 36 V or 48 V outputs?
These and other project-specific AC outputs are available. The final voltage tolerance depends on the input range, load current, cable length and required regulation. If the equipment needs DC, the rectifier and filter circuit must also be specified.
7. Can one waterproof transformer have multiple output cables?
Multiple output leads or independent secondary windings can be provided. ECKO reviews the current on each branch, simultaneous loading, isolation requirement, cable sealing and connection identification before fixing the design.
8. How does a long output cable affect the voltage at the load?
Cable resistance causes voltage drop, especially at low voltage and high current. Send the one-way cable length, conductor size, load current and minimum acceptable voltage at the equipment so the transformer output and cable can be coordinated.
9. Why is thermally conductive epoxy used?
The resin helps seal the magnetic assembly, supports windings and transfers heat toward the enclosure. Its thermal conductivity, viscosity, cure profile, adhesion and compatibility with insulation and cable materials all affect reliability.
10. Is the thermal protector automatically resettable?
Not always. A thermal fuse is normally one-time operation, while some thermal protectors reset after cooling. The preferred device, operating temperature and safety behaviour must be agreed before design approval.