The substation (transwich) is designed to convert high-voltage three-phase alternating current into low voltage, as well as to distribute and switch the load of electrical receivers installed in underground workings that are hazardous for gas (methane) or dust, while ensuring the protection of low voltage lines.
The type of explosion protection “intrinsically safe electrical circuit” for external control and protection circuits is provided with level ib according to GOST 3 1610.11-2014.
The substation has the types of explosion protection “explosion-proof enclosure” in accordance with GOST IEC 60079-1-2013, which withstands the pressure of an explosion of a methane-air mixture inside, excluding the transfer of an explosion to the environment and “intrinsically safe electrical circuit” in accordance with GOST 31610.11-2014, and also meets the general requirements for explosion-proof electrical equipment according to GOST 31610.0-2014.
| Parameter name | Parameter value | Tolerances |
|---|---|---|
| Rated power of the substation, kVA | 800 | – |
| Rated frequency, Hz | 50 | – |
| Rated primary voltage, V | 6000 | ±15% |
| Rated secondary voltage, V | 1200 | ±5% |
| Rated secondary current, A | 400 | – |
| Number of power outlets, pcs. | 6 | – |
| Method and range of voltage regulation | off-load tap ±5% | – |
| Insulation class according to the heat resistance of the transformer | Н | |
| Mechanical life of the disconnector, number of on-off cycles | 2000 | – |
| Controlled insulation resistance with symmetrical three-phase leakage, kOhm per phase | 60 | – |
| Controlled value of insulation resistance at single-phase leakage, kOhm | 50 | – |
| Overall dimensions, mm | 4900х1004х1300 | |
| Total weight, kg, not more than (one part) | 8100 (4500) | – |
| Level and type of explosion protection | IP54 | |
| Level and type of explosion protection | РВ Ех db [ib Mb] I Mb | |