OVERHAUL & REPAIR
SN systematically establishes maintenance plans according to customer requests such as power generation plants, steel plants, cement/paper plants, oil refining/chemical plants, and pump stations, and supports periodic inspection of the condition of motors/generators and stable operation of facilities.
In addition, SN responds to emergency requests from customers with a 24-hour response system at all times, and eliminates problems that may occur in the future by accurately identifying and analyzing the cause when repair work is in progress. Also, since reverse engineering is possible by the design team, it is supported for improved facility operation.
We realize customer satisfaction through the best technology and diagnostic and testing equipment that can evaluate the soundness of rotating equipment through insulation diagnosis and characteristic testing of electric motors/generators.
Planned Preventive Maintenance - Electric motor/Generator OVERHAUL
Induction Motor
| Capacity | 0.4KW to 30MW |
|---|---|
| Voltage | Up to 13.2 kV |
| Pole | 2 ~ 36P |
Direct Current Motor
| Capacity | 0.75KW to 5000KW |
|---|---|
| Voltage | Up to 2.0 kV |
| Pole | 2 ~ 36P |
Electric motor for Vehicle
| Capacity | 30KW to 2MW |
|---|---|
| Voltage | Up to 3.0 kV |
| Pole | 2 ~ 8P |
Synchronous Generator & Motor
| Capacity | 5.5KW to 50MW |
|---|---|
| Voltage | Up to 2.2 kV |
| Pole | 2 ~ 36P |
Repair - Rewinding
Induction motor rewinding
Coil Loop Winding
Coil Winding
Coil Taping
Forming
Surge Test
CORE 청소
Coil Incerting
Vacuum impregnation(VPI)
Drying
Impregnation, Drying completed
Generator rotor rewinding
Generator stator rewinding
Generator excitation repair
Generator rotor repair
Tests and diagnostics for Properties
Performance test
- Full load characteristics(Efficiency, Power factor)
- Torque Properties(Starting torque, Pull-up torque, Maximum torque)
- Temperature rise test
- Withstand voltage
- Measurement of noise/vibration
Inspection of stator electrical properties
- Insulation resistance test
- Polarization Index (PI) Test
- AC current Test
- Dielectric loss tangent test
- Partial Discharge (PD) Test
- Winding resistance
- Tan-Delta
- EL-CID
Inspection of stator mechanical properties
- The robustness of the slots wedge
- Air gaps
- Winding End Impact Test
Inspection of rotor electrical properties
- PI Test
- Voltage Drop Test
- Partial Discharge Test
- RSO
- Insulation Resistance
- Winding resistance, etc.
Inspection of rotor mechanical properties
- Bearing & Retaining Ring
- The robustness of the slots wedge
- Shop Balancing (~15 tons)
Other electrical works/mechanical works
Panel production/installation
Pump maintenance, water treatment/environmental facility maintenance work, air conditioning construction
