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www.efacec.com
Regeneração de Óleo Isolante
www.efacec.com
Substation Services
Single-phase and three-phase oil filled power transformers/ autotransformers/shunt reactors/mobile Substations (on-site services) up to 745kV:
• Dress and test
• Unit disassembly and accessories packing
• Unit transportation between customer installations
• Oil handling
• Oil treatment
• Oil fi ltering and degassing
• Bushings maintenance or replacement
• Control box maintenance or replacement
• Oil leaks repair (tank welding and re-gasket)
• Metallic surfaces treatment (new paint or paint retouch)
• External accessories maintenance or replacement (oil level gauge, rapid pressure rise relay, Buchholz relay, pressure relief device, thermometers and other accessories)
• Old conservator replacement by new one equipped with rubber cell and oil level gauge
mod. CS404I1801A1
Efacec USA, Inc.2725 Northwoods Parkway, suite B l Norcross, GA 30071 l phone: +1 (770) 446-8920 | e-mail: [email protected] | web: www.efacec.com Du
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Low voltage tests core and windings
• Insulation resistance;
• Windings resistance;
• Transformer turn ratio;
• Power factor, excitation, leakage reactance and capacitance (Doble) on transformers, bushings and surge arresters;
• SFRA and DFR transformer tests;
• CT ratio, polarity, saturation and winding resistance;
• Oil and hot-spot winding thermometer calibration;
• Control cabinet operation checks on Buchholz relay, OLRC relay, rapid pressure rise relay, OLTC, DETC, etc;
• Input current on motors (fan, pump, OLTC and DETC driving mechanism).
Oil tests
• Dissolved gas analysis;
• Physical-chemical (water content, breakdown, IFT, etc.);
• 2-FAL;
• Corrosive sulfur.
Installation of monitoring system
Diagnostics and corrective actions
Maintenance management (technical and economical)
Risk assessment
Transformer failures forensic analyses
Testing