For removing particles and moisture at 3-4 µm, I’d recommend a GlobeCore CMM-series oil purification unit using multi-stage mechanical filtration with 3-4 µm cellulose cartridges (with ?4 kg dirt holding capacity) plus thermal vacuum dehydration to remove dissolved water. This combination keeps differential pressure stable, extends filter life, and delivers real moisture reduction-not just particle capture.

Power transformer testing includes routine, type, and special tests defined by IEC 60076/IEEE C57. Routine tests check ratio, winding resistance, insulation resistance, tan-delta, vector group, impedance, no-load/load losses, and induced/separate-source withstand. Type tests include lightning and switching impulse to verify dielectric coordination. Special tests may include partial discharge, FRA, sound level, temperature rise (heat run), and OLTC functional tests. Together they validate electrical, thermal, and mechanical robustness before energization.

Overload accelerates insulation degradation; faults generate arcs and gas. Without fast isolation, pressure exceeds tank strength.

It reduces voltage from MV to LV for consumer or industrial loads while maintaining safety and power quality.

In practice, drying can be accelerated by combining thermal, vacuum, and electrical methods rather than relying on passive heating alone. Applying deep vacuum lowers the boiling point of water and increases the moisture diffusion rate from paper to oil and vapor. Using controlled heating (hot air, hot oil circulation, or oven heating) raises insulation temperature and speeds up moisture migration. For large units, low-frequency drying (LFD) is very effective, because it heats the windings internally and uniformly. The key is to monitor moisture evolution and avoid overheating, since excessive temperature can damage cellulose faster than it dries.

Color codes may indicate phase identification, terminal polarity, tap positions, control wiring, and grounding designations to support safe installation and maintenance.

The gas-to-liquid ratio depends on the process, but typically varies from 1:50 to 1:200 for stable cavitation. It can be adjusted according to viscosity and reaction intensity requirements.

The CMM-6/7 oil purification unit operates at approximately 6-7 m³/h capacity and removes water, gases, and impurities under vacuum. We will provide indicative pricing and delivery details.

The trailer-mounted CMM series oil filtration systems are mobile units for transformer maintenance. Please specify desired flow rate and voltage so we can prepare a technical and price offer.