Mobile Prefabricated Substation
The Mobile Prefabricated Substation is a fully integrated, factory-assembled power solution designed for rapid deployment in emergency, temporary, or permanent power distribution applications. Built on a robust skid or trailer-mounted platform, it combines high-voltage switchgear, cast resin or oil-immersed transformer, low-voltage switchgear, protection relays, metering, and auxiliary systems into a compact, weatherproof enclosure. This plug-and-play design enables fast installation and commissioning, significantly reducing on-site construction time. With advanced safety features, intelligent monitoring, and high reliability, the mobile substation delivers stable power supply while offering excellent flexibility for load changes and network expansions. It is ideal for utilities, industrial projects, mining operations, and events requiring quick and dependable power infrastructure.
- Primary Voltage Ratings 11/0.4 kV, 22/0.4 kV, 33/0.4 kV, 33/11 kV
- Secondary Voltage Ratings --
- H.V. Tap Range --
- Type Mobile Prefabricated Substation
- BIL 11/0.4 kV, 22/0.4 kV, 33/0.4 kV, 33/11 kV
- Standards IEC, ASTM, UL
- Application temporary power, emergency backup
- Power Rating --
- Certificate UL, CESI, IEEE
- Cooling Method AN / ONAN
- Opeartion --
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
Mobile Prefabricated Substation
110kV Mobile Prefabricated Substation Data Sheet
35kV Vehicle Mounted Substation
35kV Vehicle Mounted Distribution Substation
| No. | Item | Specs | Unit | Quantity |
| I | Primary electric equipment | |||
| 1 | Main transformer | SF-50000/110115 ± 2 *2.5%/36.5KVUd=10.5% YN.d11 ONAFuses 45# transformer oil. | pc | 1 |
| 2 | Neutral grounding equipment | GW13-72.5 630A discharge gap 120 ± 5mmCT 100-300/1A 10P20 30VA arrester YH1.5W5-72/186 | set | 1 |
| 3 | 110KVHGIS Combined electrical equipment | 126kV 2000A 40kA Current transformer, circuit breaker, isolating switch, grounding switch, bushing etc. | pc | 1 |
| 4 | 110kV potential transformer | TYD-110/3-0.01H110/√30.1/√30.1/√30.1Kv0.2/0.5/3P 20VA 30VA 50VA | pc | 3 |
| 5 | 110KV Metal oxide arrester | YH10WZ-108/281Ur=88kV In=10kA with discharge counter | pc | 3 |
| 6 | 35KV Inlet & outlet cabinet | 40.5KVcircuit breaker cabinet 1250A-31.5kA upper inlet and lower outlet | pc | 1 |
| 7 | 35KV Bus-bar equipment cabinet | PT with 0.5A fuse, bottom plug arrester with primary harmonic elimination | pc | 1 |
| 8 | 35KV station cabinet | 30KVA subsation 1A fuse | pc | 1 |
| II | Secondary electric equipment | |||
| 1 | Main transformer protection and control panel | Main & backup protection device 2pcs, high voltage measurement device 1 pc, low voltage measurement device 1pc, ontology protection 1pc, public measurement device 1pc | pc | 1 |
| 2 | Monitor & remote cabinet | Telecontrol unit 1set ( Main & backup standby ,roating device 1pc, monitoring host 2pcs ( with "five electrical prevention" ) , switch 1pc, time check 1pc,Electrical collection device 1pc | pc | 1 |
| 3 | AC-DC power supply panel | DC power supply 3*10A/220VUPS power supply 2kVA | pc | 1 |
| 4 | Battery panel | 50AH DC220V | pc | 1 |
| 5 | Multi-functional meter | 0.5 level | pc | 1 |
| 6 | Multi-functional meter | 0.2S | pc | 1 |
| III | Auxiliary equipment | |||
| 1 | Semitrailer | The load of three line six axle suspension system is more than 75 tons, including gooseneck, suspension and support system. Meet the requirements of class IV road trafficability. | unit | 1 |
| 2 | Cabin | Integrated fire alarm, air conditioning, lighting, electric heating etc., which are used to install indoor equipment of secondary panel cabinet & switch cabinet etc. | set | 1 |
| 3 | Online monitoring of transport status | Acceleration tester, GPS, driver recorder. | set | 1 |
| 4 | SF6 inflated and deflated device | Pressure condensing type, SF6 hermetic compressor, inflation rate﹥40kg/h, 6-10M3/H, recovery rate of compressor 40kg/h (8M3/H ). | pc | 1 |
| 5 | Pedal pull, Pedalladder | The supplier should ensure to meet the operation requirements, and the pedal ladder shall be self- retraction. | set | enough |
| No. | Item | Specs | Unit | Quantity |
| I | Primary electric equipment | |||
| 1 | Main transformer | SF11-2000035 35 ± 2 x 2.5%/10.5kV Ud=10.5% Y.d11 ONAF | pc | 1 |
| 2 | 35kV Inlet & outlet cabinet | 35kVcircuit breaker1250A-31.5kA Integrated current transformer, circuit breaker, isolating switch, grounding switch etc. | pc | 1 |
| 3 | 35KV Bus-bar equipment cabinet | PT with 0.5A fuse, bottom plug arrester with primary harmonic elimination | pc | 1 |
| 4 | 10KV Inlet & outlet cabinet | 12kvcircuit breaker, upper inlet and lower outlet 2000A-31.5kA | pc | 1 |
| 5 | 10Kv Equipment cabinet | PT with 0.5A fuse, bottom plug arrester with primary harmonic elimination | pc | 1 |
| 6 | 10KV Station cabinet | 0KVA subsation 1A fuse | pc | 1 |
| II | Secondary electric equipment | pc | ||
| 1 | Main transformer protection and control panel | Main & backup protection device 2pcs, high voltage measurement device 1 pc, low voltage measurement device 1pc, ontology protection 1pc, public measurement device 1pc | pc | 1 |
| 2 | Mnitor & remote cabinet | Telecontrol unit 1set ( Main & backup standby ), roating device 1pc, monitoring host 2pcs ( with "five electrical prevention" ) , switch 1pc, time check 1pc,Electrical collection device 1pc | pc | 1 |
| 3 | AC-DC power supply panel | DC power supply 3*10A/220VUPS power supply 2kVA | pc | 1 |
| 4 | Battery panel | 50AH DC220V | pc | 1 |
| 5 | Multi-functional meter | 0.5 level | pc | 1 |
| 6 | Multi-functional meter | 0.2S | pc | 1 |
| III | Auxiliary equipment | |||
| 1 | Semitrailer | The load of three line six axle suspension system is more than 75 tons, including gooseneck, suspension and support system. Meet the requirements of class IV road trafficability. | unit | 1 |
| 2 | Cabin | Integrated fire alarm, air conditioning, lighting, electric heating etc., which are used to install indoor equipment of secondary panel cabinet & switch cabinet etc. | set | 1 |
| 3 | Online monitoring of transport status | Acceleration tester, GPS, driver recorder | set | 1 |
| 4 | Pedal pull, Pedalladder | The supplier should ensure to meet the operation requirements, and the pedal ladder shall be self- retraction. | set | enough |
| No. | Item | Specs | Unit | Quantity |
| I | Primary electric equipment | |||
| 1 | 35KV inlet cabinet | 1250A 31.5kA arrester | pc | 1 |
| 2 | 35KV outlet cabinet | 1250A 31.5kA arrester | pc | 6 |
| 3 | Bus-bar equipment cabinet | PT with fuse, bottom plug arrester with primary harmonic elimination | pc | 1 |
| 4 | Substation | 30kVA with 1A fuse | pc | 1 |
| II | Secondary electric equipment | pc | ||
| 1 | Circuit protection device | Installed in inset & outlet cabinet | pc | 7 |
| 2 | Multi-functional meter | 0.2S | pc | 7 |
| 3 | Multi-functional meter | 0.5 | pc | 1 |
| 4 | AC-DC power supply cabinet | DC power supply 3*10A/220VUPS power supply 2kVA, battery 20AH 220V DC | pc | 1 |
| 5 | Bay level switch | Can connected to integrated automation system of vehicle mounted substation | pc | 1 |
| 6 | Electric energy collection device | pc | 1 | |
| III | Auxiliary equipmen | |||
| 1 | Semitrailer | Double axle air suspension semitrailer | unit | 1 |
| 2 | Cabin | Integrated fire alarm, air conditioning, lighting, electric heating etc., which are used to install indoor equipment of secondary panel cabinet & switch cabinet etc. | set | 1 |
| 3 | Pedal pull, Pedalladder | Can meet the operation requirements, and the pedal ladder shall be self- retraction. | set | enough |
| 4 | 35KV Power cable | Connecting cable between YJV-26/35kv-400 vehicle mounted substation and distribution workshop (including cable accessories) | meter | 180 |
| 5 | Online monitoring of transport status | Acceleration tester, GPS, driver recorder | set | 1 |
Customization Optional
Mobile Prefabricated Substation
The Mobile Prefabricated Substation can be highly customized to meet specific project voltage, capacity, and environmental requirements. Available configurations include different voltage levels (up to 132kV), capacities from 500kVA to 5000kVA, and various transformer types (cast resin dry-type or oil-immersed). Switchgear options encompass GIS, AIS, or RMU configurations with intelligent protection relays and remote monitoring systems. The base structure can be designed as skid-mounted, trailer-mounted (with wheels and towing system), or containerized for easy transportation.
Additional customization includes climate-specific designs (tropical, desert, or extremely cold), integrated diesel generator sets, solar hybrid systems, advanced SCADA and communication modules, fire suppression systems, and enhanced security features such as CCTV and access control. Customers can also choose color schemes, branding, internal layout optimization, and special accessories like cable reels or earthing systems. These flexible options make the mobile substation an ideal turnkey solution for diverse applications.
Packing and Shipping
Mobile Prefabricated Substation
The Mobile Prefabricated Substation is packaged with heavy-duty protection suitable for its size and complexity. The entire unit is securely fixed on a reinforced transport frame with anti-vibration mounts and multiple locking points. All external bushings, doors, and movable parts are braced with custom wooden supports and protective covers. Sensitive electronic components and control panels receive additional foam padding and anti-static wrapping. The substation is then covered with waterproof tarpaulin and fixed with industrial-grade strapping for maximum security during transit.
We provide flexible global shipping solutions tailored to project urgency and destination. For international deliveries, sea freight using flat-rack or Ro-Ro vessels ensures safe handling of the heavy and oversized load, with typical transit times of 25–55 days. Air freight is available for critical spare parts. Domestic and regional transport utilizes specialized low-bed trailers with hydraulic systems and police escorts where required for oversized cargo.
Full export documentation is prepared in advance, including commercial invoices, packing lists, certificates of origin, test reports, and transportation permits to accelerate customs clearance. We follow sustainable logistics practices by optimizing load configurations and using recyclable protective materials wherever possible. Customers receive real-time GPS tracking and dedicated logistics coordinator support throughout the journey.
Upon arrival, we offer optional professional supervision for unloading, site positioning, and initial inspection. For urgent projects, we support fast-track delivery with pre-arranged heavy-lift equipment at the destination. This comprehensive packing and shipping process ensures the mobile prefabricated substation arrives safely and ready for rapid deployment.
We provide flexible global shipping solutions tailored to project urgency and destination. For international deliveries, sea freight using flat-rack or Ro-Ro vessels ensures safe handling of the heavy and oversized load, with typical transit times of 25–55 days. Air freight is available for critical spare parts. Domestic and regional transport utilizes specialized low-bed trailers with hydraulic systems and police escorts where required for oversized cargo.
Full export documentation is prepared in advance, including commercial invoices, packing lists, certificates of origin, test reports, and transportation permits to accelerate customs clearance. We follow sustainable logistics practices by optimizing load configurations and using recyclable protective materials wherever possible. Customers receive real-time GPS tracking and dedicated logistics coordinator support throughout the journey.
Upon arrival, we offer optional professional supervision for unloading, site positioning, and initial inspection. For urgent projects, we support fast-track delivery with pre-arranged heavy-lift equipment at the destination. This comprehensive packing and shipping process ensures the mobile prefabricated substation arrives safely and ready for rapid deployment.
32
32 years of industry experience
Manufacturer Test
Mobile Prefabricated Substation
Progress Test
Mid-to-late stage progress testing features complete system integration checks, including interlock verification between switchgear and transformer. Partial discharge and power frequency withstand tests are performed on the assembled high-voltage section. Cooling system airflow and thermal performance are evaluated under simulated load. Intelligent control system simulation tests all monitoring, protection, and communication functions. Final mechanical stability and transport simulation tests (vibration and inclination) confirm durability for mobile applications. Comprehensive data logging ensures full traceability before final acceptance. High-voltage and low-voltage switchgear components undergo individual dielectric and mechanical operation checks. Transformer core and winding tests verify no-load loss and insulation integrity. Preliminary integration testing confirms proper alignment of all modules and busbar connections.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss 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
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Factory Acceptance Test
Advanced FAT includes full-load temperature rise simulation, short-circuit withstand verification, and automatic control logic testing under various operating scenarios. Remote communication and SCADA integration are validated for data accuracy and command response. Mechanical operation tests cover doors, earthing switches, and movable components. Final inspection verifies paint quality, labeling, accessories, and overall assembly workmanship. Complete test reports with calibration certificates and optional customer witness records are provided, certifying the substation’s readiness for deployment. High-voltage and low-voltage switchgear undergo operation, interlock, and dielectric withstand tests. Protection relays and metering devices are calibrated and functionally verified. Overall insulation resistance and partial discharge tests are conducted on the complete system.
Routine Test - Transformer Turns Ratio/TTR (All Tap Voltages)
Purpose of Testing
The purpose of the transformer turns ratio (TTR) test is to confirm whether the voltage ratio between each tap of the transformer meets the design requirements and ensure that the transformer winding is connected correctly. By measuring the voltage ratio of each tap, it is possible to detect whether there is a fault or deviation in the transformer winding.
Testing Equipment
TTR tester: such as Doble, Megger, Omicron and other brands of transformer winding ratio tester.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Pre-Test Preparation
Disconnect all transformer tap-changers from the power supply and ensure that all equipment is properly grounded and discharged.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Test Progress
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Measure and Record
Start the test and record the following parameters:
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
Temperature Correction
If necessary, perform temperature correction on the measured turns ratio data (especially when testing at higher or lower temperatures). Generally, the standard reference temperature for temperature correction is 20°C.
Repeat Testing (if necessary)
Test the transformer's windings of different voltage levels (high voltage, medium voltage, and low voltage) separately to ensure that the turns ratios of all windings are normal.
Evaluation Criteria (Reference)
Turns ratio error ≤ 0.5% (pass)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Extensively used in utility emergency response, industrial temporary power needs, renewable energy projects, and remote site electrification, providing fast, flexible, and dependable power solutions across diverse applications.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
Transformers Packaging (3)
Transformers Packaging (4)
Transformers Packaging (5)
Transformers Packaging (6)
Transformers Packaging (7)
Transformers Packaging (8)
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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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