Network distribution online transformers drying systems represent a significant undertaking for power engineers. Accumulation of moisture within a transformer has been demonstrated to engender a reduction in reliability and has been associated with the occurrence of severe accidents. Previously, the process of drying required the transformer to be taken out of service, resulting in downtime and significant financial expenditure. The present situation is therefore wholly different from that which prevailed previously. GlobeCore’s CMM-260C system facilitates transformer drying without the necessity of disconnection from the mains. The functionality of the equipment is as follows: it is connected directly to the transformer and is responsible for the removal of moisture from the oil and windings during normal operation. The process is entirely automated, thereby eliminating the potential for equipment or personnel to be exposed to risk. A notable characteristic of the CMM-260C is its ability to facilitate uniform drying through the effective organisation of oil and heat circulation. The system has been designed to adapt to the actual operating conditions of the transformer, with temperature and humidity being monitored in real time.
Network distribution online transformers 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) | ||