167kVA Single Phase Pad Mounted Transformer
The 167kVA single phase pad mounted transformer is engineered for higher-capacity underground residential and light commercial distribution, efficiently transforming primary voltages such as 12470GrdY/7200, 24940GrdY/14400, 34500GrdY/19920, or dual-voltage configurations to secondary 120/240V split-phase or 240V outputs. Constructed with premium grain-oriented silicon steel cores and aluminum or copper windings, it delivers exceptional energy efficiency and minimal losses while fully complying with DOE 2016 standards and IEEE/ANSI C57.12.34 specifications.
- Primary Voltage Ratings 34.5-19.92/13.8-7.957/13.2-7.62/12.47-7.2, 24.94, 26.25, 33 or others
- Secondary Voltage Ratings 480-240/240-120or customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Loop Feed or Radial Feed
- BIL 30/95kV
- Standards CSA, IEEE, DOE, NEMA
- Application Residential areas, Commercial hubs
- Power Rating 167kVA
- Certificate UL/cUL, CSA, CESI
- Cooling Method ONAN, ONAN/ONAF, KNAN, KNAN/KNAF
- Oil Mineral Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
167kVA Single Phase Pad Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 167 kVA |
| Rating Primary Voltage | 11950Delta or Customized |
| Secondary Voltage | 480-240V 240-120V 277V Customized |
| Frequency | 50/60Hz |
| Vector Group | Ii0,Ii6 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE,Doe 2016,CAS Std or Customized |
| Impedance Voltage | Nominal 2% or Customized 1.1-5.75% |
| Altitude | ≤1,000m or Customized |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized etc |
| Tank material | Mild Steel, 304 Stainless Steel |
| Insulating Oil Weight | 265 kg |
| Total Weight | 910 kg |
| Outline Dimensions（L×W×H）in. | 1200×965×1000(mm) |
| Lifting Lug | ELSP Fuse |
| Hinged Door | BAY-O-NET Fuse |
| Parking Bracket | Tap Changer |
| Tank Cover | Oil Level Gauge |
| L.V Bushing (4-Hole ) | Pressure Relief Valve |
| Two/Four Position Load break Switch | Vacuum Pressure Gauge |
| HV Grounding Copper Bar | Terminal Block |
| Temperature Indicator | Door Handle |
| H.V Bushing Well | Ground Strap |
| Grounding Copper Bar | Nameplate |
| 1"'Drain Valve With 3/8" Sampler | Non-PCB decal |
| 1" Upper Fill Valve Filter Press Connection | High Voltage Warning Signs |
Customization Optional
167kVA Single Phase Pad Mounted Transformer
Customize the 167kVA single phase pad mounted transformer to address medium-to-high load underground residential and light commercial needs with comprehensive configuration options for safety, efficiency, and compliance. Primary voltage selections cover grounded wye from 2400V to 34500V, including standard ratings like 4160GrdY/2400, 12470GrdY/7200, 24940GrdY/14400, or dual-voltage setups, paired with secondary voltages such as 120/240V, 240/480V, 277V, or custom low-voltage outputs for regional compatibility. Winding materials offer aluminum for cost-effective lightweight design or copper for superior conductivity and thermal performance in larger residential or small commercial applications. Enclosure styles feature dead-front ANSI Type-1 or Type-2 compartmental with low-profile shrubline aesthetics or ranch runner compactness for landscape integration. Tap changers provide 5-position external (±2x2.5%) adjustments for voltage regulation, while impedance ranges from 2% to 5.75% optimize fault current control and voltage stability. Protective integrations like bayonet fuses, expulsion links, lightning arresters, or wildlife guards mitigate site risks, and natural ester fluids deliver enhanced fire safety and environmental compliance over mineral oil.
These tailored features improve energy savings, surge resilience, and pad installation versatility, delivering a reliable transformer optimized for medium-load underground power distribution. Further customizations include enclosure coatings resistant to corrosion in humid or coastal environments, reinforced bases for seismic stability, or accessory additions such as oil temperature gauges, liquid level indicators, secondary spade terminals, and ground pads for efficient connections. Bushing BIL ratings up to 150-200kV accommodate surge-intensive areas, and core advancements minimize no-load losses for maximum DOE compliance. These broad options position the 167kVA single phase pad mounted transformer as a highly adaptable, high-performance solution, ensuring secure, standards-compliant distribution with reduced maintenance and long-term cost savings in underground residential and light commercial networks.
Packing and Shipping
167kVA Single Phase Pad Mounted Transformer
Packaging for the 167kVA single phase pad mounted transformer uses export-grade wooden crates reinforced with steel strapping and internal timber cradles to securely stabilize the compartmental tank and prevent shifting during transit. High-density foam padding, vibration-dampening mounts, and corner protectors shield bushings, doors, and fittings from impacts, while vacuum sealing, abundant desiccant packets, and nitrogen pressurization protect insulating oil from moisture and oxidation. HV/LV compartments are individually covered, ports tightly sealed, and partial oil drainage ensures transport safety. Detailed international labels specify handling instructions, weight distribution, sling points, and hazard classifications for secure global movement.
Shipping is tailored to the transformer's larger capacity, utilizing specialized lowboy trailers with hydraulic suspension, heavy-duty chains, and full weatherproof tarps for domestic overland routes to guard against environmental exposure. International shipments employ flat-rack or open-top containers on ocean vessels with IMO-compliant lashing, bracing, and corrosion inhibitors for prolonged marine transit. Satellite GPS tracking and comprehensive all-risk insurance provide continuous monitoring and protection. Strict adherence to ANSI, IEEE, and customs regulations accelerates clearance, minimizing delays for the 167kVA single phase pad mounted transformer in worldwide utility projects.
Sustainability principles guide packing, incorporating responsibly sourced recyclable timber and optimized load configurations to reduce carbon emissions. Impact and tilt recorders attached to crates log handling conditions for post-arrival verification and efficient claim resolution. Accessories such as arresters, fuses, gauges, or radiators ship separately with itemized checklists for onsite reconciliation. Proven carriers specializing in pad-mounted equipment secure necessary heavy-haul permits and follow rigorous safety protocols across diverse land and sea routes.
Delivery coordination includes pad foundation alignment guidance, detailed unpacking protocols, oil refilling procedures, and connection torque specifications. Collaboration with installation teams ensures safe handling and rapid commissioning. This end-to-end logistics framework preserves transformer integrity, accelerates deployment, and supports uninterrupted medium-to-high load underground residential and light commercial power reliability.
Shipping is tailored to the transformer's larger capacity, utilizing specialized lowboy trailers with hydraulic suspension, heavy-duty chains, and full weatherproof tarps for domestic overland routes to guard against environmental exposure. International shipments employ flat-rack or open-top containers on ocean vessels with IMO-compliant lashing, bracing, and corrosion inhibitors for prolonged marine transit. Satellite GPS tracking and comprehensive all-risk insurance provide continuous monitoring and protection. Strict adherence to ANSI, IEEE, and customs regulations accelerates clearance, minimizing delays for the 167kVA single phase pad mounted transformer in worldwide utility projects.
Sustainability principles guide packing, incorporating responsibly sourced recyclable timber and optimized load configurations to reduce carbon emissions. Impact and tilt recorders attached to crates log handling conditions for post-arrival verification and efficient claim resolution. Accessories such as arresters, fuses, gauges, or radiators ship separately with itemized checklists for onsite reconciliation. Proven carriers specializing in pad-mounted equipment secure necessary heavy-haul permits and follow rigorous safety protocols across diverse land and sea routes.
Delivery coordination includes pad foundation alignment guidance, detailed unpacking protocols, oil refilling procedures, and connection torque specifications. Collaboration with installation teams ensures safe handling and rapid commissioning. This end-to-end logistics framework preserves transformer integrity, accelerates deployment, and supports uninterrupted medium-to-high load underground residential and light commercial power reliability.
32
32 years of industry experience
Manufacturer Test
167kVA Single Phase Pad Mounted Transformer
Progress Test
Early progress testing during fabrication of the 167kVA single phase pad mounted transformer emphasizes core validation, inspecting grain-oriented silicon steel laminations for precise stacking, burr-free edges, and low-loss performance using epstein frame measurements to meet DOE 2016 efficiency benchmarks. Winding assembly verifies conductor tension and insulation layering with incremental hipot testing to detect early defects. DC resistance on primary and secondary windings measures at ambient with micro-ohmmeters, confirming alignment within 0.5%. Preliminary turns ratio across taps employs digital bridges for accuracy better than 0.3%. Core clamping torque validates structural stability, and vibration simulation assesses transport resilience. Oil batch certification confirms dielectric strength exceeding 35kV and controlled moisture/acidity. Enclosure compartmental welds undergo penetrant and ultrasonic inspection for hermetic integrity, while pad mounting base experiences dimensional accuracy and load capacity trials. All interim data feeds into traceable quality records for real-time oversight and corrective actions.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor:
♦ Ratio, Polarity, and Phase Relation:
♦ Winding Resistance:
♦ Impulse Tests:
♦ On load Loss Test:
♦ No Load Loss Test
♦ Leak Test:
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Transformer Factory Acceptance Test
Factory acceptance testing for the 167kVA single phase pad mounted transformer commences with exhaustive visual and dimensional inspections against drawings, assessing enclosure construction, dead-front security, bushing alignment, and compartment barriers. Winding DC resistance uses Kelvin bridge techniques with temperature correction, maintaining results within 0.8% tolerance. Turns ratio and polarity validation across taps employs high-precision TTR for errors below 0.3%. Dissipation factor and capacitance at 10kV limit tan delta below 0.45%. No-load loss and exciting current at rated voltage confirm DOE efficiency compliance, excitation limited appropriately. Load loss and impedance quantification via short-circuit method yields accurate performance metrics. Power frequency withstand applies required kV for one minute without flashover. Induced voltage test stresses inter-turn insulation. Oil analysis confirms breakdown voltage exceeding 40kV and minimal dissolved gases.
Routine Test - Polarity 1-Ph
Purpose of Testing
The purpose of testing the polarity of a single-phase transformer is to ensure that the primary and secondary windings are correctly oriented, preventing issues like improper phase connection. It also verifies that the transformer operates safely and efficiently in the intended electrical system.
Testing Equipment
Test equipment: Polarity Tester (e.g. Megger, Hioki, etc.)
Voltage source: usually 500 V, 1000 V or customized as needed
Environmental monitoring: Temperature and humidity meter (records ambient temperature and humidity)
Voltage source: usually 500 V, 1000 V or customized as needed
Environmental monitoring: Temperature and humidity meter (records ambient temperature and humidity)
Pre-Test Preparation
Disconnect the device from the power supply and ensure that it is properly grounded and discharged.
Check the connection terminals and wiring to ensure that there is no looseness or contamination.
Test under suitable environmental conditions: relative humidity less than 75% and no rain (recommended temperature: 20-30°C).
Check the connection terminals and wiring to ensure that there is no looseness or contamination.
Test under suitable environmental conditions: relative humidity less than 75% and no rain (recommended temperature: 20-30°C).
Test Progress
Connect the Test Instrument:
Connect the test equipment to the bushing or terminal of the device under test and ensure proper grounding.
Apply Test Voltage:
Select the appropriate test voltage according to the rated voltage of the device. For single-phase systems, the applied voltage should comply with the equipment specifications (such as 220V or 380V, etc.).
Connect the test equipment to the bushing or terminal of the device under test and ensure proper grounding.
Apply Test Voltage:
Select the appropriate test voltage according to the rated voltage of the device. For single-phase systems, the applied voltage should comply with the equipment specifications (such as 220V or 380V, etc.).
Measure and Record
Start the test and record the following parameters:
Phase sequence: Confirm whether the phase sequence of the power supply is correct.
Polarity: Check whether the wiring meets the predetermined polarity (positive and negative terminals are connected correctly).
Voltage: The actual voltage value during the test.
Phase sequence: Confirm whether the phase sequence of the power supply is correct.
Polarity: Check whether the wiring meets the predetermined polarity (positive and negative terminals are connected correctly).
Voltage: The actual voltage value during the test.
Temperature Correction
Measure different wiring points (such as input and output) for comparative analysis to ensure that the electrical polarity is consistent.
Repeat Testing (if necessary)
If necessary, correct the measured parameters to the reference temperature (usually 20°C) to ensure the accuracy of the test results.
Evaluation Criteria (Reference)
Correct polarity: The wiring meets the expected polarity requirements and meets the standard. Reverse polarity: If reverse polarity occurs, it should be corrected immediately and retested. Polarity uncertainty: If there is any uncertainty, further check the power supply and wiring configuration.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Suitable for rural residential clusters paired with light commercial or farm operations, this 167kVA single phase pad mounted transformer supports farmsteads, small workshops, irrigation pumps, and community facilities, providing efficient, secure underground distribution in semi-rural zones emphasizing reliable single-phase supply and minimal visual impact.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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