Product Overview
3 Phase Delta To Wye Transformer integrates a B23P090 silicon steel core and multi-channel windings to provide step-down voltage conversion while reducing no-load losses according to IEC standards.
Scope of Supply
Product: Distribution transformer;
Number of phases: 3 phase;
Rated power: Up to 2500 kVA distribution transformer;
Primary voltage: 11KV;
Secondary voltage: 400V;
Vector Group: Dyn11;
Customizable production: Available.
Technical Specification for Single phase Transformer
|
Model |
S-M-250kVA-11/0.4 |
|
Type |
Oil Immersed Power Transformer |
|
Standard |
IEC60076 |
|
Rated Power |
250kVA |
|
Frequency |
50HZ |
|
Phase |
Three |
|
Cooling Type |
ONAN |
|
Primary Voltage |
11 KV |
|
Secondary Voltage |
0.4KV |
|
Winding Material |
Copper |
|
Vector Group |
Dyn11 |
|
Impedance |
4.5% |
|
Tap Changer |
NLTC |
|
Tapping Range |
±2*2.5% @ Primary Side |
|
No Load Loss |
0.56 KW |
|
On Load Loss |
3.20KW |
|
Accessories |
Standard Configuration |
Compliance, Certification & Safety Standards
| Standard / Certification | Factory Compliance & Technical Verification |
|---|---|
| ✔ UL 1561 | Meets construction safety criteria for dry-type equipment. |
| ✔ ISO 9001 | Ensures full manufacturing process and component traceability. |
| ✔ IEEE C57.12.00 | Adheres to international distribution apparatus safety limits. |
| ✔ NEMA ST-20 | Validates audible noise and ventilation safety baselines. |
| ✔ CE Marking | Confirms electromagnetic compatibility for industrial power grids. |
Quality Control & Factory Testing
- Voltage Accuracy
Verified via 0.5% transformation ratio testing to ensure voltage output compliance.
- Insulation Integrity
Withstands standard high-voltage dielectric tests, proving zero breakdown under peak electrical stress.
- Grounding Safety
Confirms single-point core grounding ≤0.1 Ω for electrostatic discharge and fault protection.
- Grid Stability
Restricts impedance variance within ±7.5% to ensure stable, reliable parallel power distribution.
- Energy Efficiency
Validates ultra-low no-load and load losses, confirming long-term operational cost savings.
appications
| Application Field | Practical Deployment | Benefits |
|---|---|---|
| Industrial & Mining | Steps down voltage for industrial machinery. | Balances large inductive loads and suppresses severe line harmonics. |
| Rural & Agriculture | Supplies remote agricultural power grids. | Minimizes voltage drops and handles highly unbalanced single-phase loads. |
| Ports & Docks | Powers maritime logistics equipment. | Improves short-circuit protection response during heavy-load startup surges. |
| Telecom Base Stations | Provides neutral-grounded power supply. | Eliminates neutral drift, protecting sensitive communication equipment. |
| Outdoor Temporary | Feeds power to mobile open-air sites. | Ensures grounding safety and stable voltage in harsh environments. |
Transformer Process Flow Diagram
Transformer drawings
◆ Schematic diagram of high and low voltage connection of 3-phase delta to wye transformer
Packaging & Logistics
- Dual-Layer Iron Frames: Custom rigid steel structures double container space utilization to reduce oceanic freight costs.
- Anti-Shifting Stability: Withstands up to 2G transport vibration forces, preventing internal core or winding displacement.
- Structural Safety: Heavy-duty reinforced nesting eliminates structural deformation or impact damage during multi-modal transit.
- Ready-to-Use Delivery: Secure containment ensures the transformer arrives with factory-certified insulation and zero oil leakage.
FAQ
Q: Can this unit operate continuously at maximum temperature limits?
A: Yes, the integrated multi-channel cooling ducts prevent localized thermal hotspots under full nominal load.
Q: How is structural integrity verified prior to container loading?
A: Every unit undergoes a factory pressure test and standard three-axis vibration simulation before crating.
Q: What is the standard production lead time for custom vector configurations?
A: Factory engineering and assembly require 4 to 6 weeks, depending on specific structural dimensions.
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