The CMM-260C is an subway transformers online drying system developed by GlobeCore for the continuous operation of transformer equipment in metro systems. The system has been developed to enable the efficient removal of moisture from transformer oil without interrupting the power supply, which is critical for the operation of underground transport. In the subway, transformers operate in an environment with high humidity, limited access to equipment and constant load. Oil moisture has the potential to compromise the insulating properties, thereby increasing the risk of system failures and endangering passengers. The CMM-260C is able to carry out online drying while the transformer is in operation. The unit has been engineered to facilitate the circulation of oil within itself, to dry it, and to return it, while concurrently monitoring temperature, pressure, and humidity in real time. The system is characterised by its mobility, ease of maintenance and reliability in operation. The CMM-260C has been engineered to prevent accidents, extend transformer longevity and ensure a stable power supply, which is vital for underground transport.
Subway transformers online drying system CMM-260C Specifications
| Parameter | Value | ||
| Capacity, liters/hour (gpm), not less than | 30 (0,13) | ||
| Water absorption capacity, liters (gal) | 9 (2,4) | ||
| Adsorbent load per column, kg (lbs) | 20 (44) | ||
| Parameters of processed oil: | |||
| – max moisture content, ppm | < 5 | ||
| – ISO 4406 class | -/14/12 | ||
| – min dielectric strength, kV | >65 | ||
| Output pressure, bar (psi) | 2 (29) | ||
| Oil output head, m (in) | 20 (790) | ||
| Max power required, kW | 0,25 | ||
| Power supply | |||
| voltage, V | 400 | ||
| AC frequency, Hz | 50 | ||
| Dimensions, mm (in), max | |||
| length | 1150 (45) | ||
| height | 1980 (78) | ||
| width | 490 (19) | ||
| Max weight, kg (lbs) | 400 (880) | ||
