Australia features a complex geographical environment, with high temperature and arid conditions in inland areas, as well as heavy salt mist and high humidity along coastal regions. Sandstorms and intense ultraviolet radiation prevail all year round. The local power grid operates at a power frequency of 50Hz, and power distribution equipment must strictly comply with Australia’s mandatory national standards including AS/NZS, SAA, MEPS and RCM. Industrial and mining parks, new energy power stations, port industrial zones and commercial complexes impose stringent requirements on power distribution equipment in terms of fire safety, zero leakage, weather resistance and low power loss.
Qingdao Hengfengshuai Electric Co., Ltd. has long been engaged in the R&D and manufacturing of power transmission and distribution equipment, with a complete international certification system and rich experience in global cross-border project delivery. Tailored to the load and power distribution requirements of this project, we deliver a full-process solution for 7 sets of 33/0.4kV copper winding dry-type compact substations, including 4 units of 2000kVA 33/0.4kV dry-type compact substations and 3 units of 4000kVA 33/0.4kV dry-type compact substations. The 2000kVA units are equipped with 5 outgoing circuits rated at 630A each, while the 4000kVA units are fitted with 10 outgoing circuits rated at 630A each. Adopting an all-copper winding dry-type structure, the equipment contains no insulating oil and features fire and explosion resistance. It is fully adapted to the operating conditions and power grid specifications across Australia. We provide one-stop services covering design, production, certification, cross-border transportation, installation and operation & maintenance, to support the safe and efficient operation of local power grids.

I. Project Overview and Core Technical Parameters of 33/0.4kV Dry-Type Compact Substation

This customized solution is developed for large-scale outdoor power distribution projects in Australia. The integrated compact substation integrates H-class epoxy resin cast dry-type transformer, medium-voltage power distribution unit, low-voltage outgoing cabinet, intelligent protection system, temperature control & heat dissipation system, lightning protection and grounding system. Manufactured with high-purity copper windings, the equipment boasts zero leakage, maintenance-free performance, excellent resistance to harsh environments and low operating loss. As a professional manufacturer of export-oriented power distribution equipment, all our products have obtained authoritative certifications of SAA, MEPS and RCM, fully conforming to the AS/NZS series standards. Designed for a 33kV medium-voltage incoming and 0.4kV low-voltage outgoing power distribution system, the substations can operate stably in all outdoor scenarios across Australia, including inland areas, coastal regions and suburban parks.

Equipment List

Equipment Specification	Quantity	Low-Voltage Outgoing Configuration	Application Scenarios
33/0.4kV 2000kVA Dry-Type Compact Substation	4 units	5 outgoing circuits of 630A	Auxiliary factory buildings, supporting structures and medium & small load zones
33/0.4kV 4000kVA Dry-Type Compact Substation	3 units	10 outgoing circuits of 630A	Main production workshops, centralized load centers and large power consumption areas

Core Technical Parameters of 33/0.4kV Dry-Type Compact Substation

Parameter	2000kVA (2MVA)	4000kVA (4MVA)	Remarks
Equipment Type	Outdoor integrated copper winding dry-type compact substation	Outdoor integrated copper winding dry-type compact substation	Epoxy resin cast dry-type structure
Rated Capacity	2000kVA	4000kVA	Capable of short-time overload operation
Voltage Level	33kV/0.4kV	33kV/0.4kV	Compliant with Australian power distribution voltage standards
Rated Frequency	50Hz	50Hz	Standard power frequency for Australian power grids
Winding Material	High-purity oxygen-free solid copper	High-purity oxygen-free solid copper	Low power loss, strong short-circuit resistance and excellent aging resistance
Insulation / Fire Rating	H-class insulation, F1-class flame retardant	H-class insulation, F1-class flame retardant	High temperature resistance and no open fire risk
Protection / Anti-Corrosion Grade	IP54, C4-M anti-corrosion	IP54, C4-M anti-corrosion	Dustproof, rainproof, resistant to salt mist and sand erosion
Low-Voltage Outgoing Circuits	5 circuits of 630A	10 circuits of 630A	Independent circuits with complete electrical protection
Applicable Standards	AS/NZS, SAA, MEPS, RCM	AS/NZS, SAA, MEPS, RCM	Mandatory national standards of Australia
Operating Ambient Temperature	-25℃ ~ +50℃, full outdoor operation	-25℃ ~ +50℃, full outdoor operation	Adapt to high temperature, salt mist and intense ultraviolet radiation environments
Cooling Mode	Natural air cooling + intelligent forced air cooling	Natural air cooling + intelligent forced air cooling	Automatic heat dissipation activated under high temperature

II. Customized Design for Australian Power Grid and Harsh Operating Conditions

Considering Australia’s 50Hz power frequency, extreme high temperature, coastal salt mist, inland sandstorms, as well as strict energy efficiency and fire safety requirements, we have set up a dedicated design team for Australian projects. Leveraging rich practical experience in overseas projects, we completed the full set of customized designs and passed multi-dimensional reviews and pre-certification for local standards.

1. Electromagnetic and Energy Efficiency Design

Electromagnetic simulation software is adopted to optimize parameters in strict compliance with Australia’s MEPS energy efficiency standards. High-permeability silicon steel sheets are used for iron cores to effectively reduce no-load loss. High and low voltage windings are wound with high-purity oxygen-free solid copper flat wires with a conductivity of 99.99%, which greatly cuts down load loss. The windings are processed by vacuum epoxy resin casting for overall sealing and curing, featuring low partial discharge and strong anti-harmonic interference capability. Free of insulating oil, the equipment causes zero leakage and no pollution, complying with Australian environmental regulations, and can be deployed in ecologically sensitive areas and densely populated zones.

2. Enclosure and Weather-Proof Anti-Corrosion Design

The enclosure is fabricated with thick steel plates through integral welding, and verified by finite element strength analysis for robust structure and impact resistance. The surface undergoes sand blasting and multi-layer heavy-duty anti-corrosion powder coating to reach C5 anti-corrosion grade, enabling long-term resistance against coastal salt mist, inland sandstorms and UV aging. The overall protection grade is IP54. The enclosure is equipped with diversion roof ridges and built-in drainage grooves, together with sealing strips for full sealing performance to prevent dust ingress, rain penetration and rainwater backflow. The internal air duct is optimized and matched with H-class high-temperature resistant insulating materials, ensuring stable performance under Australia’s extreme ambient temperature up to 50℃ in summer and no brittle failure at low temperatures.

3. Low-Voltage Power Distribution Design

Outgoing circuits are arranged differentially according to load demands, and all electrical components are SAA certified.

• 2000kVA 33/0.4kV compact substation: Equipped with 5 independent 630A outgoing circuits. Each circuit is fitted with overload, short-circuit, leakage and under-voltage protection, so the failure of a single circuit will not affect the overall power supply.

• 4000kVA 33/0.4kV compact substation: Equipped with 10 independent 630A outgoing circuits. The multi-circuit shunt design meets the power demand of large-scale centralized loads.

High and low voltage cabinets adopt modular integrated design. Wiring is implemented in accordance with AS/NZS 3000 specifications with neat layout, facilitating on-site installation and routine inspection.

4. Intelligent Temperature Control and Protection System

All units are equipped with an intelligent temperature control system. Temperature sensors are embedded in windings to monitor operating temperature in real time. Forced air cooling fans will start automatically when the temperature exceeds the set value. Over-temperature alarm and automatic tripping at extreme high temperature provide multi-layer protection to avoid equipment damage caused by overheating. The equipment integrates comprehensive protection functions including over-current, short-circuit, over-voltage, lightning surge and islanding protection, fully meeting the grid connection requirements of Australian power grids. The enclosure is fitted with a local operation panel and remote communication interface, supporting on-site inspection and remote monitoring to adapt to the development of smart power grids in Australia.

5. Design Review and Compliance Verification

After the completion of the design scheme, our technical, process, quality and compliance teams conduct a special review to verify seven key aspects including electromagnetic performance, structural strength, fire resistance & insulation and standard compliance. We also cooperate with local Australian certification bodies to complete pre-audit for SAA, MEPS and RCM certifications, ensuring the finished products fully meet market access requirements of Australia.

III. Manufacturing of 33/0.4kV Dry-Type Compact Substation: Full-Process Quality Control for Australia-Specific Products

The whole production process follows the SQA full-process quality inspection system and ISO9001 quality management specifications. We conduct 100% re-inspection on all core raw materials and strictly control key production procedures to guarantee product quality from the source.

1. Raw Material Inspection

Core materials including silicon steel sheets, high-purity copper wires, H-class insulating materials, epoxy resin, anti-corrosion coatings and high & low voltage switches are fully inspected for performance parameters and qualification certificates. Unqualified materials are prohibited from being put into production to ensure the basic performance and weather resistance of the equipment.

2. Manufacturing of Dry-Type Transformer Body

Transformers are manufactured in a constant temperature and humidity clean workshop. The iron core is processed by precision shearing and multi-stage lap joint technology, with the operating noise controlled below 65dB(A). Solid copper windings are neatly wound, then treated by vacuum pressure casting and staged constant-temperature curing, with no air bubbles or cracks and excellent short-circuit resistance. DC resistance and transformation ratio of each unit are tested one by one, with parameter error controlled within ±0.5%.

3. Enclosure Assembly and General Assembly

After welding, the enclosure is tested for leakage and structural strength before anti-corrosion spray coating. High & low voltage distribution cabinets, busbars and protection devices are assembled in a modular way with firm and standard wiring. After the transformer body is accurately positioned, the air cooling, temperature control and protection circuits are connected. The whole unit is thoroughly cleaned and re-inspected for sealing performance to ensure qualified dustproof and moistureproof capabilities.

4. Dehumidification Enhancement Treatment

To adapt to the high-humidity environment in Australia, the whole equipment undergoes multiple cycles of hot air dehumidification to completely remove internal moisture and greatly improve insulation stability in humid conditions.

IV. Factory Acceptance Test (FAT): Full Inspection for Compliant Delivery

Prior to delivery, all equipment undergoes a complete set of tests in accordance with AS/NZS and IEC standards to simulate actual operating conditions in Australia. Bilingual (Chinese & English) FAT reports are issued and delivered together with the equipment.

1. Conventional Electrical Tests

Tests on winding resistance, transformation ratio, insulation resistance, power frequency withstand voltage, no-load/load loss and temperature rise are carried out, with all indicators complying with MEPS energy efficiency requirements. Linked tests are performed on 5/10 630A outgoing circuits, protection devices and temperature control & air cooling systems to ensure sensitive and reliable operation.

2. Environmental and Special Tests

A series of tests including lightning impulse, partial discharge, high & low temperature cycling, salt spray, damp heat, sand and dust tests are conducted to simulate Australia’s extreme climates and verify the equipment’s weather resistance and lightning protection performance. The noise level test ensures the noise is no more than 65dB(A), making the equipment applicable to residential areas.

3. Grid Connection Function Test

Islanding protection as well as voltage and frequency adaptability tests are implemented in line with local standards to ensure compliant grid connection. Products are affixed with certification labels and approved for delivery only after all tests pass.

V. Packaging and Transportation: Cross-Border Combined Transportation with Full Traceability

As an island country, Australia adopts sea transportation combined with land transportation for equipment delivery. With rich experience in cross-border logistics, we formulate a special protection plan for long-distance transportation.
Vulnerable accessories such as cooling fans, instruments and terminals are disassembled, numbered and packed separately. Precision electrical components are fitted with shockproof cushions. Each unit is equipped with a 3D impact recorder to monitor vibration and impact data throughout transportation. The main equipment is fixed on solid wood brackets, wrapped with waterproof and moisture-proof films and tarpaulins, and fitted with anti-collision corner protectors. Accessories are packed in solid wooden cases marked with international symbols for lifting, moisture prevention and no inversion.
Complete documents including Chinese & English certificates of conformity, certification documents, FAT reports, operation manuals and electrical drawings are attached to each shipment. All equipment is loaded into fully sealed containers with internal reinforcement and desiccants placed inside. Professional staff track the whole logistics process to ensure the 7 compact substations arrive at the site safely and synchronously.

VI. On-Site Installation and Commissioning: Standard Operation for One-Successful Grid Connection

After the equipment arrives at the project site in Australia, our technical team works together with the owner, local supervisors and power grid operation & maintenance personnel to complete handover, installation, testing and commissioning in strict accordance with Australian electrical installation specifications for smooth grid connection.

1. On-Site Unpacking and Acceptance

Joint unpacking and inspection are conducted by all involved parties:

1. Visual inspection: Check the coating, welding seams and sealing structure for dents, corrosion and deformation, and verify the integrity of ventilation and drainage structures.

2. Equipment and accessory verification: Check the quantity and model of main units, accessories and spare parts against the packing list to ensure no loss or damage.

3. Transportation data verification: Check data from impact recorders to confirm no excessive impact or vibration during transportation.

4. Document and certification verification: Inspect the completeness of all technical documents and Australian certification certificates to meet the acceptance requirements of local power grids.

2. Standard On-Site Installation Procedures

1. Foundation positioning: Pour concrete foundations complying with Australian standards for outdoor equipment. Lift and position the equipment accurately with hydraulic tools, control the levelness strictly and fasten anchor bolts to resist sandstorms and strong winds.

2. Accessory reassembly: Reinstall disassembled cooling fans, instruments and operation panels as per drawings, and tighten all wiring terminals and sealing components.

3. Cable laying and wiring: Adopt power cables complying with Australian standards for standardized laying. Wire each circuit as marked, separate high and low voltage cables, and construct the grounding system in accordance with AS/NZS 3000 standards to meet grounding resistance requirements.

4. Re-inspection of overall sealing: Recheck enclosure sealing strips, vents and drainage grooves to ensure intact outdoor protection performance.

3. Site Acceptance Test (SAT)

After installation, a full set of on-site acceptance tests are carried out, and the test data are compared with FAT records to confirm no performance degradation caused by installation or transportation.

• Re-test insulation resistance, dielectric loss and power frequency withstand voltage

• Recheck winding DC resistance, transformation ratio and connection group

• Full inspection on protection functions and switching performance of 630A outgoing circuits

• Commissioning of temperature control system, air cooling system and remote monitoring system

• Linked tests for grid connection protection, islanding protection and lightning protection

• Static tests on overall noise and temperature rise

4. Phased Power-On and Commissioning

After all tests are qualified, power is supplied in phases in accordance with Australian power grid commissioning regulations with dedicated staff on duty throughout the process.

1. No-load impulse test: Perform multiple no-load closing impulse tests, monitor excitation current and protection actions, and proceed to no-load operation if no abnormality is found.

2. No-load operation: Run continuously for 24 hours under no-load condition, and monitor winding temperature, equipment noise, voltage, current and cabinet temperature in real time with operating data recorded.

3. On-load commissioning: Apply load gradually by stages. Power on single circuits first, then operate all circuits under full load. Our technicians stay on site for 72 hours to track the operating status under different load conditions of 1.5MW and 3MW. After confirming all 630A outgoing circuits work stably, the equipment is successfully connected to the grid and operates continuously and reliably.

VII. Full-Process Quality Control System

Qingdao Hengfengshuai Electric establishes a closed-loop quality control system covering design, production, factory inspection, transportation, installation and operation & maintenance. All data and files of each link are archived for full traceability. Compliance with local standards is guaranteed at the design stage; dual inspection on materials and working procedures is implemented during production; full tests are conducted before delivery; dedicated protection and real-time monitoring are applied during transportation; standardized construction and SAT tests are performed on site; bilingual technical documents are provided for the local team to conduct independent operation and maintenance.

VIII. Summary of 33/0.4kV Dry-Type Compact Substation Solution

This customized 33/0.4kV copper winding dry-type compact substation solution for Australia is an integrated power distribution solution tailored to local power grid conditions, climates, regulations and load characteristics, with outstanding core advantages:

1. Superior Fire Safety: Oil-free dry-type structure with F1-class flame retardant and explosion-proof performance, meeting Australian fire codes and applicable for deployment in all areas.

2. Excellent Weather Resistance: IP54 protection grade and C5 heavy-duty anti-corrosion performance, with H-class high temperature resistance, adapting to harsh environments with high temperature, salt mist, sandstorms and intense ultraviolet radiation.

3. High Efficiency and Energy Saving: High-purity solid copper windings and optimized electromagnetic design realize low power loss. The products comply with MEPS energy efficiency standards and hold complete SAA & RCM certifications for compliant grid connection.

4. Flexible Power Distribution: 5/10 independent 630A outgoing circuits deliver stable power supply and strong fault isolation capability.

5. Easy Operation & Maintenance: Fully sealed and maintenance-free design, ideal for use in remote areas of Australia.

6. One-Stop Services: Full support covering cross-border transportation, installation & commissioning and bilingual technical documents for worry-free project delivery.

Backed by mature dry-type transformer manufacturing technology and rich experience in Oceania overseas projects, our products provide reliable power distribution guarantee for industrial & mining facilities, new energy stations and commercial parks across Australia. For customized solutions, scheme optimization, quotation and technical consultation of dry-type compact substations for Oceania regions, please contact us for dedicated services: www.hengfengshuai.com