Transformer Repair
In addition to being a transformer manufacturing company, Rymel also provides diagnostic, maintenance, and repair services for transformers.
Below are the activities offered related to each service:
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Repair, manufacturing, or modification of one or more coils in both dry and oil transformers.
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Voltage modification in both low and medium voltage.
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Repair or modification of the tank.
On-Site Transformer Maintenance
- Washing and baking of the active part
- Dielectric oil change
- Gasket replacement
- Tank cleaning through mechanical or chemical attack
- Tank painting
- Routine electrical tests
- Type electrical tests (optional)
- Electrical test protocol
- Instrumentation review
Furthermore, in our product portfolio, we offer various electrical tests that are part of our diagnostic, repair, and maintenance services, which are mentioned below.
- Transformation Ratio
- Insulation Resistance
- Winding Resistance
- Vacuum test for transformer maintenance in plant 1
- Short circuit test
- Applied voltage test
- Induced voltage test
- Impulse test
- Partial discharges test
- Frequency Response Analysis (FRA)
- Power factor test
On-Site Transformer Maintenance
In addition to providing diagnostic and maintenance services at its facilities, Rymel also offers this service on-site. The following are the services provided:
- Washing the transformer and the cell with a hydro-washer.
- Blowing and vacuuming the components of the measuring and power cells. Washing the doors and covers of the cells.
- Correction of oil leaks from transformers.
- Replacement of the gasket.
- Changing insulators and hardware for low and high voltage.
- Review and replacement of measuring and control elements of power transformers.
- Electrical tests.
- Vacuuming and blowing with Nitrogen for dry transformers.
Maintenance in Power Substations up to 44KV
Preventive maintenance in a substation is carried out with the aim of detecting failures that could affect its proper functioning, as a substation is a fundamental part of an industry and a production shutdown can lead to significant financial losses.
Maintenance in an electrical substation consists of:
- Physical inspection of the structures and each of its components.
- General cleaning.
- Lubrication of mechanical components.
- Connection adjustments.
- Mechanical, electrical, and dielectric tests.
Electrical Testing for Transformers On-Site and In-Plant
Rymel currently has a wide portfolio of electrical tests in order to offer our customers the best advice and diagnosis for their equipment. Below are the electrical tests that are performed.
- Transformation Ratio
- Insulation Resistance
- Winding Resistance
- No-load Test
- Short Circuit Test
- Applied Voltage Test
- Induced Voltage Test
- Impulse Test
- Partial Discharge Test
- Frequency Response Analysis (FRA)
- Power Factor Test
Physicochemical Analysis of Mineral and Vegetable Dielectric Oil
As we well know, the dielectric oil is a fundamental part of the transformer's lifespan, therefore, it is of great importance to know its condition to prevent a possible failure in the future. For this reason, Rymel offers the following diagnostic services for the dielectric oil:
- Dielectric breakdown voltage (ASTM D877).
- Neutralization number (ASTM D974).
- Interfacial tension (ASTM D2285).
- Color (ASTM D1500).
- Relative density (ASTM D1298).
- Moisture in PPM (ASTM D1533).
- Quality index
Thermography Service
Thermography is a technique with which temperature measurements can be made without contact and at a distance, while also allowing visualization of images, which are formed by the source of infrared radiation.
Applications of thermography in industrial preventive maintenance, this technique is applicable for:
- High and low voltage lines.
- Control and power cabinets.
- Electrical joints, hotspots.
- Distribution and power transformers.
- Electric motors.