Three-phase isolation transformer for mine wind & storage microgrid, mainly for galvanic isolation. It blocks DC injection and common-mode leakage current, eliminates ground loop interference, protects wind-storage converter and step-up transformer. Rugged design adapted to harsh dusty mining environments, IEC compliant.
Isolation Transformer
- 1. Provides galvanic isolation between wind-storage converter and downstream power system
- 2. Blocks DC component and common-mode leakage current to protect power electronics devices
- 3. Breaks ground loop interference, preventing nuisance tripping in high-resistivity mine soil
- 4. Suppresses high-frequency surge & EMI noise, improving power quality of mine microgrid
- 5. Heavy-duty dust & sand resistant design for remote desert and plateau mining sites
Isolation Transformer for Mine Wind & Storage Microgrid
Our three-phase isolation transformer is specially designed for renewable mine microgrid system, matched with our Wind & Storage Converter. Its core function is galvanic isolation between primary and secondary winding. It blocks DC component and common-mode leakage current, eliminates ground loop interference and suppress high frequency surge noise. It protects power electronic equipment and step-up transformer, greatly reducing false protection trips in remote mine sites with unstable earth resistivity. It can be integrated into full mine renewable EPC solution together with our wind-storage converter, MV /35kV /66kV switchgear and GIS.
System Connection & Working Principle
Main Purpose: This isolation transformer creates fully galvanic separation between wind & storage converter and downstream power circuit. It stops DC injection and stray leakage current from damaging the transformer and power semiconductors, and isolates ground faults to avoid disturbance spreading across the mine microgrid.
- Primary Side (Input): Connect to AC output of Wind & Storage Converter, typical 690V low voltage AC.
- Secondary Side (Output): Connect to step-up transformer, then feed into medium/high voltage mine switchgear for mining loads supply.
Technical Parameters
| Rated Capacity | 500kVA / 800kVA /1000kVA /1600kVA /2500kVA /3150kVA optional |
| Primary / Secondary Voltage | 690V /690V (1:1 isolation); custom voltage available |
| Phase & Frequency | 3-phase, 50Hz /60Hz adaptive |
| Winding Material | Full copper winding |
| Vector Group | Dyn11 |
| Insulation Class | H class |
| Protection Grade | IP23 standard; IP54 enclosed cabinet optional |
| Ambient Temperature | -40℃ ~ +55℃ |
| Cooling Method | ONAN air cooling, ONAF forced air cooling optional |
| Altitude | ≤2000m standard, customized for plateau up to 5000m |
| Extra Feature | Electrostatic shield between windings for EMI suppression |
Application Scenarios
- Off-grid mine wind & storage hybrid microgrid, matched with PCS / wind storage converter
- Protect step-up transformer against DC component injection from power converter
- Isolate ground fault and eliminate ground loop in desert & plateau mining site
- EV mining truck charging & battery swap station power system
- Remote mine camp renewable power distribution system
- Wind-solar-storage integrated power station for mining EPC tender
Core Advantages
- Galvanic isolation design: Complete electrical separation between primary and secondary side, prevent fault propagation.
- DC blocking capability: Effectively block DC component from wind-storage converter, avoid transformer DC bias & overheating damage.
- Anti-leakage & ground loop elimination: Solve frequent protection tripping problem caused by poor mine earthing condition.
- Wide environment adaption: H-class insulation, dust & sand resistant, suitable for desert, high altitude mine sites.
- Seamless matching: Perfectly coordinate with our wind & storage converter, MV/35kV/66kV switchgear to form full EPC power package.
Product Features
- Full copper winding, low loss, high reliability for continuous heavy-duty mining operation
- Electrostatic shield between windings, suppress common-mode EMI & high frequency spike
- Robust tank / cabinet structure, anti-vibration for mining site transportation
- Optional temperature sensor & remote temperature monitoring, compatible with mine SCADA
- Multiple capacity selection, parallel operation available for large mine power project
- IEC test report, FAT document support for overseas mining tender project
FAQ
Q1: What is the difference between isolation transformer and step-up transformer?
A: Step-up transformer mainly raises voltage level for long-distance transmission. Isolation transformer focuses on galvanic separation, usually keeps input and output voltage same. It blocks DC and leakage current to protect wind-storage converter and step-up transformer. We can provide both types in one EPC package.
Q2: Where should we install this isolation transformer in wind-storage microgrid?
A: It is installed right after AC output port of wind & storage converter, before step-up transformer. It isolates the converter from downstream circuit and stops DC component flowing into step-up transformer.
Q3: Can it work in desert mine with heavy dust?
A: Yes. We offer IP54 enclosed cabinet option with dust and sand protection, H-class insulation for high ambient temperature.
Q4: Can multiple transformers run in parallel for large mine power load?
A: Yes, multiple units can be parallel connected to expand system capacity for big mining EPC project.
Q5: What certificates and documents can you provide?
A: IEC test reports as standard. FAT inspection documents, temperature test report and regional certification support can be supplied for tender approval.
Q6: Typical lead time?
A: Standard air-cooled model: 6–9 weeks. IP54 enclosed customized solution will be quoted separately based on capacity and requirements.
Related Products
Get in touch
Have a project in mind ? Send us your ore assay report, mine location and target capacity. Our mining engineers will prepare a customized process design, equipment list and quotation within 48 hours.