Innovative technology with guaranteed quality—defining the new era of power solutions.
01 General
1.1 Project Description
SCOTECH is glad to provide high-quality 167 kva pad mount transformer for Jamaica Public Service. The successful delivery of this batch of high-performance Single Phase Pad Mounted transformers marks the company’s further expansion into the global Transformer market and demonstrates its excellence in innovation and quality management. The delivered transformers will be widely used in a number of infrastructure projects, including urban power grid upgrades, rural power improvements, and power support in commercial areas. The customer spoke highly of the delivery, praising SCOTECH’s professionalism and efficiency.
The single-phase transformer has a capacity of 167kVA, the high voltage is 24GrdY/13.8kV and 12GrdY/6.9kV and low voltage is 0.12/0.24kV, which can easily meet local electricity demand. The transformer adopts a dual voltage design and requires the use of a dual voltage switching switch for voltage switching. This design ensures that the transformer can adapt to different power demands, thereby improving its practicality and adaptability. The pad mounted transformers delivered this time are widely used in urban and rural power distribution networks with superior durability and high efficiency. This series of transformers has been designed with environmental adaptability and long-term stability in mind, ensuring stable operation even in extreme weather conditions. SCOTECH will continue to focus on technological innovation, improving product quality and expanding its international market share. The company said that it will spare no effort to promote the technological progress of the power equipment industry and help the sustainable development of global energy.
1.2 Technical Specification
167 kva pad mount transformer specifications type and data sheet
| Delivered to | Jamaica |
| Year | 2024 |
| Type | Pad mounted transformer |
| Standard | IEEE |
| Rated Power | 167KVA |
| Feed | Loop |
| Front | Dead |
| Winding | Copper |
| Polarity | Subtractive |
| Frequency | 50HZ |
| Phase | 1 |
| Cooling Type | ONAN |
| Primary Voltage | 24GrdY/13.8-12GrdY/6.9 KV |
| Dual Primary Voltage | Yes |
| Secondary Voltage | 0.24/0.12 KV |
| Winding Material | Copper |
| Vector Group | Ii0 |
| Impedance | 4% |
| Tap Changer | NLTC |
| Liquid Insulant | Mineral Oil |
| Tapping Range | ±2*2.5% |
| No Load Loss | 0.332KW |
| On Load Loss | 1.115KW |
| Tolerance | 10%NLL,6%Total Loss |
| Accessories | Standard Configuration |
1.3 Drawings
167 kva pad mount transformer diagram drawing and size.
02 Manufacturing
2.1 Core
| The high efficiency and energy saving coil core structure design is adopted. The coil core design is wound along the better magnetic conductivity direction of the oriented silicon steel sheet, which fully gives full play to the superior performance of the oriented silicon steel sheet. The magnetic circuit distortion is small, so the no-load loss and no-load current are smaller than that of the laminated iron core (the laminated iron core will have magnetic circuit distortion because of the laminated joint). Because the coil core is continuously rolled by silicon steel material, compared with the shear core, under the same conditions, the no-load loss of the coil core can be reduced by 30%; The noise is correspondingly lower. In terms of production, the winding core can use very thin high-permeability magnetic cold-rolled oriented silicon steel sheet to produce a lower loss of variable pressure, the winding core does not cut waste, but also can be mechanized operation, so the production efficiency is relatively high. All in all, the wound core has the advantages of high permeability, low loss, low noise, strong short-circuit resistance and good quality consistency. |  |
2.2 Winding
 | The wiring design of single-phase American transformer effectively reduces the length of low-voltage distribution line, reduces line loss and improves power supply quality; Reduce the low-voltage power supply radius, can reduce the line loss more than 60%. The high and low voltage winding is made of copper. |
2.3 Tank
| The oil tank is cut, punched and bent by laser numerical control equipment to ensure the processing accuracy. Surface electrostatic spray treatment, 30 years do not remove paint. The cabinet adopts a clamshell design, which facilitates the connection of cables and electrical components. The cabinet also has a versatile design to meet the protection device and switch configuration. The transformer adopts a fully sealed structure, strong overload capacity, high reliability in continuous operation and simple maintenance. |  |
2.4 Final Assembly
03 Testing
| No. | Test Item | Unit | Acceptance Values | Measured Values | Conclusion |
| 1 | Resistance Measurements | / | / | / | Pass |
| 2 | Ratio Tests | / | The deviation of voltage ratio on the principal tapping: ≤0.5% Connection symbol: Ii0 | A:0.00 B:0.00 | Pass |
| 3 | Polarity tests | / | Subtractive | Subtractive | Pass |
| 4 | No-load losses and excitation current | % kW | I0 : provide measured value P0: provide measured value the tolerance for no load loss is +10% | 0.17 0.235 | Pass |
| 5 | Load losses, impedance voltage, total losses and efficiency | / kW kW | t:85℃ Z%: measured value Pk: measured value Pt: measured value the tolerance for impedance is ±10% the tolerance for total load loss is +6% | 3.74 1.146 1.381 99.41 | Pass |
| 6 | Applied Voltage Test | / | LV: 10kV 60s | No collapse of the test voltage occurs | Pass |
| 7 | Induced Voltage Withstand Test | / | Applied voltage (kV): 40 Duration(s): 40 Frequency (HZ): 150 | No collapse of the test voltage occurs | Pass |
| 8 | Insulation Resistance Measurement | GΩ | LV-HV to Ground | 18.9 | / |
| 9 | Leakage Test | / | Applied pressure: 20kPA Duration: 12h | No leakage and no Damage | Pass |
| 10 | Oil Dielectric Test | kV | ≥45 | 56.11 | Pass |
04 Packing and Shipping
05 Site And Summary
The single-phase pad-mounted transformer, with its high reliability, energy-saving features, and versatile design adaptable to various environments, is the ideal choice for power distribution systems. Whether in urban development, rural power grids, or commercial and industrial applications, it delivers stable and efficient power support. Choosing the single-phase pad-mounted transformer is not only a key step toward improving power supply efficiency but also a wise choice for building a safe, eco-friendly, and sustainable power system!
