}
| Main Specification | |
| Transformer Type | Dry type |
| Rated capacity | Up to 8000kVA |
| Rated voltage | Up to 11kV |
| Frequency | 50/60Hz |
| Phase | 3 Phase |
| Winding material | Copper /Aluminum |
| Insulation class | H(180℃), C (220℃) |
| Vector group | Dyn11, YNd1d1,Yyn |
| Cooling |
ANAN,GNAN |
| Protection Enclosure | IP00 to IP56 |
| Explosion-proof type | ExdIMb |
| Zone | Zone 1, Zone 2 |
| Tank Paining | C4 and C5 on resquest |
| standard | IEC, AS, EN, IEEE/ANSI, GOST |

HV and LV switches have three configuration options:
A) Mining Flameproof HV vacuum switch + Mining Flameproof LV protection box
B) Mining Flameproof HV vacuum switch + Mining Flameproof LV feed switch
C) Mining Flameproof HV vacuum switch + Mining Flameproof LV multi-loop combined switch(LMCC)



Varelen has launched online FAT plan for customers. Our factory can make acceptance testing ( either witnessed and on-line) in order to show all technical and quality requirements have been done before shipment.
Routine test
Type test
Special test
Our mining flameproof substations are engineered for harsh underground coal mining power supply systems, providing a safe mobile substation solution in methane-rich Zone 1 and Zone 2 environments
The Explosion-proof Mobile Substationconsists of mainly explosion-proof high voltage switch, explosion-proof transformer, and explosion-proof low voltage switch. The transformer is bolted to the high and low voltage switches.

A: Absolutely. Our flameproof mining substations use high-temperature resistant, moisture-proof, dust-proof, and corrosion-resistant materials. They are designed to operate reliably in high humidity, dust, and high-temperature mine conditions.
Yes. Varelen designs and manufactures custom hazardous location transformers to meet project-specific requirements. Options include special voltage ratings, enclosure materials, temperature-rise classes, and mounting configurations. Each custom design is fully tested and certified for its intended hazardous classification, ensuring compliance, reliability, and safe operation in demanding environments.