The Transformer Oil Purification Machine controls the oil condition to be good to extend the transformer’s lifetime and decrease the costs because the oil is not required to be replaced.
Electricity is one of the most pivotal industries that has an important role in the economic growth of a country. So, each country seeking economic growth must develop its electric power industry. Manufacturing and commissioning generators and power stations are two necessary factors to achieve this goal. Electric power transmission and distribution are two inseparable factors of this system.
Electric power distribution from a power station needs an electric power transmission network and this important task is done through power/transmission/distribution transformers. Transformers are the most important part of an electric power transmission network. The transformer oil has the duty of cooling and insulating it. The transformer’s efficiency and lifetime depend on its suitable maintenance.
The oil quality is another important factor. So, controlling the oil condition is a good way to extend the transformer’s lifetime and decrease the costs because the oil is not required to be replaced. Some conditions can result in oil deterioration e.g. copper catalyst, iron filings, electric arc, moisture, and oxygen along high temperatures are the main factors that decrease the oil quality and cause deterioration. Some of these problems are increasing the acid number, moisture, and dielectric dissipation factor and decreasing interfacial tension, electric strength (breakdown voltage), and dielectric resistance, also the oil color gets blurry.
According to the problems mentioned above, we need a piece of equipment called a transformer oil purification machine. Having enthusiastic experts, Invex has manufactured this machine to help the electric power industry.
INVEX Transformer Oil Purification Machine Advantages
– High efficiency & easy operation
– High gas, moisture, and particle removal
– Environmentally friendly
– Cost-effective
– Three-phase power supply and low energy consumption
– Prevent the currency outflow
– 2-year guarantee and 15 years of sales services
– Optional equipment:
– Can be mounted on a trailer or chassis
– Online moisture detector
– PLC (can be equipped with a fully automatic monitoring system)
– Laboratory instruments
INVEX Transformer Oil Purification Machine Main Components
| Heaters | Phase correction key |
| Inlet strainer | Noiseless suction pump (of best European/American brands) |
| Treatment columns | Roots pump can evacuate 0/01 bar |
| Inlet/Outlet gear pump | Fine filters (3 & 1 micron rated filters) for particle removal |
| Foam sensor on vacuum chamber | Condenser or trap to remove distilled gases and water from oil |
| Condenser or water trap | Indirect heat (prevents oil ionization) |
| Temperature/Pressure controller | Separator for big particle removal |
| Inlet/Outlet filter | Level switch |
| Oil level controller | Foam control (can be installed on degassing tank to detect foam) |
| Vacuum pump | Standard painting (suitable to be used in tropical climates) |
| Vacuum booster | Pressure controller along with a safety valve |
| Processing vacuum chamber | Solenoid valve and flow switch along inlet oil path to stop the oil flow |
| Liquid sensitive sensor inside water trap | Liquid sensitive sensor inside the condenser/trap to prevent the oil from entering the vacuum pump |
| Vacuum valve (for evacuation & dry out) | Technical documents such as manuals, part lists, plans, catalogs… |
| Bypass | Thermometer along inlet/outlet oil path |
| Drive system to control oil flow rate | Pressure gauge to detect clogging |
| Protective plastic pipes for storing the hoses | Digital vacuum meter Vacuum valve (for evacuation and dry-out) |
| Heaters | Bypass between oil inlet/outlet path |
| Emergency stop | Drive system to control oil flow rate |
| Alarms | Controls & Instrumentations are of the best European brands |
| Oil level controller | Room with shutter doors, locks, etc. on the trailer |
| Inlet/Outlet sampling ports | Inlet/Outlet hoses which are stored in plastic pipes |
| Alarms & Interlocks | Phase correction key |
| Backwashing pump | Phase control switch |
INVEX Transformer Oil Purification Machine Process
Purification is moisture extraction, degassing, and particulate filtration. The oil enters the system whereby it is heated by a set of electric heaters (indirect heat) at 65-70 before pumping through a pre-filter rated at 5 microns. From filters, it enters the vacuum chamber, and the oil passes through fiberglass coalescing elements where it is exposed to a high vacuum of 0.01 to be degassed and dehydrated. Finally, it passes through a fine filter rated 1 micron and then pumped out as processed oil. Extending the oil contact surface in heaters and omitting dead zones, Invex has speeded up the heating process which leads to energy consumption.
Role of oil in transformer:
- Increase electric resistance
- Control the temperature
- Lubricant/ anti-abrasion and corrosion
- Increase the transformer life
- Sealant
- Prevent electric arc
Factors causing oil dark color:
Oil contaminants like suspended particles and free water and oil aging and oxidation may be the reason for the oil’s dark color.
Factors cause oil electric breakdown (according to IEC 60156):
- Suspended particles
- Gases and air pockets
- Moisture
- Acidity: The aging process and degradation of oil are dependent on its acidity. The maximum acidity of oil should be 0.01 mgkoh/gr.
- Oxidation: The oxidation occurs when the oil is exposed to a combination of heat and oxygen. Acid and polar compounds are formed because of oxidation and in turn, become sludge.
Factors cause particles in oil:
Paper insulation fibers, sludge from oxidation, and metal filings from wear and corrosion.
Gas generation sources of transformer oil:
- Aged transformer
- Transformer switching on
- Oil oxidation
- Tab changer
- Transformer failure
Dissolved gasses in oil:
Nitrogen, oxygen, hydrogen, carbon monoxide, carbon dioxide, methane, ethylene, acetylene.
INVEX Transformer Oil Purification Machine Main Compartments Performance
– Vacuum chamber:
Shell and all internal parts are made of carbon steel. The oil is degassed and dehydrated in this chamber. A series of level switches, an optical probe, and a float-actuated level controller are in this vacuum chamber too.
– Oil filter:
Pre and magnetic filters prevent big metal particles from entering the system. Fine filters (1-micron rated filter) are in filter vessels that are made of aluminum. The differential pressure of the filter cartridge is continuously controlled by a pressure gauge and a pressure switch.
– Heaters:
Ceramic heaters are encapsulated in seamless steel tubes to be insulated from oil. The oil is heated indirectly and slowly. The heater is controlled by a safety valve and two analog and digital thermostats.
– Vacuum pump:
The oil is degassed and dehydrated in a vacuum chamber which is evacuated by a vacuum pump. There is an oil trap located between this chamber and the pump to avoid any moisture entering the vacuum pump.
– Oil interfacial tension according to ISO6295- ASTMD971:
Surface tension is the cohesive force between oil and water molecules. The surface tension of the new oil should be 40 mn/m. Low surface tension may result in some impurities such as chemical contaminants or some polar compounds.
– Stability against oxidation according to IEC61125-IEC60296:
This test is done to determine the level of sludge, acidity, and tan delta of oil. About 25 gr of oil is exposed to a copper ring at 120 C. The test duration is different depending on the oil type. (without antioxidant: 120 h, with antioxidant: 500 h). The oil viscosity is measured according to ISO 3104-ASTMD 445.
– Oil pour point according to ISO 3016:
The oil pour point is the temperature at which it becomes semi-solid and loses its flow characteristics.
– Vacuum booster pump:
Direct drive roots type vacuum booster is applied for flow rates over 3000 l/h to achieve maximum vacuum, degasification, and dehydration.
– Inlet/outlet pump:
These pumps are utilized to draw oil into and pump out of the system. Each pump is equipped with a pressure switch which trips in the case of any clogging or high pressure.
– Vacuum valve:
This valve is applied for evacuating or drying the transformer. Invex’s transformer oil purification system can purify the oil and evacuate the transformer at the same time.
– Control panel instrumentation:
All the equipment on the control panel is of known European brands such as Tele-mechanique and Siemens. The control panel can be equipped with a fan for special climates like tropical climates. A series of instruments, alarms, and interlocks are available to provide fully automatic operation.
– Tan delta according to the IEC60247 standard:
The tan delta depends on polar and ionized molecules in oil. Tan delta is sensitive to the contamination generated during the purification process. Even only a small amount of contamination (suspended particles, sludge, deposits) can be multiplied rapidly. Excessive increase in tan delta can result in thermal instability.
– Inlet /Outlet Hoses:
These hoses are suitable to be used under vacuum conditions.
– Trailer:
The trailer is designed and manufactured according to the standard. It is equipped with a braking system, axel, and spring suspensions, and is urban road-worthy (30 k/h).
– PLC (Customized):
This digital computer is used to control the machine automatically. It can be equipped with GSM (Global System for Mobile Communications) which is used for transmitting mobile voice and data services.
– Moisture meter:
It is used for online measuring the percentage of water in oil. It can be connected to plc.
– Differential pressure sensor:
Two pressure gauges and a switch controller are used before and after filters to measure the differential in pressure. In the case of any clogging or high pressure, the pressure switch closes the electrical contact and stops the machine.
– Flow switch:
It is installed on the oil inlet/ outlet to control the oil
Extra Information about INVEX Transformer Oil Purification Machine
Here are some extra information you may need to know:
1. The Main Location for Providing Service & Selling of Transformer Oil Purification Machine
The company’s headquarters is in Germany, but we have representatives in the UAE, Türkiye and Canada to follow up on services and products.
Address: Praunheimer Landstrasse 32, 60488 Frankfurt am Main, Germany
2. Guarantee for the Services
There is a 6 month to 1 year warranty for the performance of the equipment and the work process.
3. Regions of the World We Can Provide the Services
Germany, Türkiye, Canada, Iran.
4. Periodic Services
This is the list of jobs in periodic services by Invex after selling Transformer Oil Purification Machine:
- Cleaning pumps, connections and changing vacuum oil after 500 working hours of the machine.
- High current check after 500 working hours of the machine.
- Checking the system leakage after 500 hours of operation of the device.
- The tightness of the annual connecting screws.
- Inspection of cables in terms of annual obsolescence.
- Changing the filters (or its clogging) at the time of changing more than 2 times in the pressure delta of the device.
- Cleaning the internal and external parts of the device after each period of operation.
- Inspection of the device in terms of annual corrosion.
5. Price Range of Extra Services
Starts from 2,000 dollars to 30,000 dollars, which varies according to the location and the type of service.
6. Purchasing Process
Contacting the sales unit, sending the customer’s requests, designing and sending the design to the customer, approving the design by the customer, issuing a proforma invoice, approving the proforma invoice and paying the deposit by the customer, final settlement, sending the order to the customer.
7. What Are the Transformer Oil Purification Machine Parts?
| Vacuum Tank | The vacuum tank is cylindrical and degassing and dewatering are done inside it (this tank is equipped with two floor detection sensors and a level gauge to control the oil level and prevent oil from entering the vacuum tank.) |
| Vacuum Pump | The vacuum tank (degassing tank) of the device is separated by vacuum pumps, a water trap is installed between the tank and the pump, which prevents the entry of moisture into the vacuum pumps and the release of gases into the environment. |
| Oil Filter | The primary filter (Pre & Magnetic filter) (which prevents the entry of large and metallic particles into the device) and the final oil filters are inside two aluminum boxes, which separate particles up to 3 microns from the oil and pressure switches are controlled. |
| Heaters | The heaters are ceramic, which are placed inside the refractory steel sheaths and are in indirect contact with the oil, which causes the oil to be heated slowly and carefully. The heater is controlled by a pressure relief valve and two analog and digital thermostats. |
| Inlet & Outlet Oil Pump | An inlet pump (for fully automatic model) is used to enter oil into the device, and an outlet pump is used to drain oil from the device, each of which has its own pressure controller, and in case of an increase in specific pressure or blockage of the oil path, The circuit is removed. |
| Bypass | If you need to purify the oil inside or if you want to use the inlet pump as an oil remover, you can use this valve. |
| Dashboard | The main panel equipment is used from well-known brands such as Telemechanic and Siemens, and for tropical areas (more than 45 degrees Celsius), a cooling cooler is used to keep the panel parts cool. The panel can be made and delivered up to IP65 upon request. |
| Hoses | The hoses are special for working with oil, which have 2 layers of high pressure with flexibility and vacuum conditions. (30 meters are delivered to the buyer with each device.) |
| Trailer | The trailer of the device is designed and produced according to the standard, which is equipped with brakes, pulling levers, hazard lights, suspension and axles, and can move on city roads up to 30 kilometers per hour. |
8. Shipping Worldwide
There is no limit to send products, it is possible to send all products to all over the world.
9. Price Range of Each Model
|
Specification |
Weight (approx) kg |
RAW Price $ |
Automatic | ||
| NN-VOP2 | 200 | 400 | 900 | 15,580 | 19,480 |
| NN-VOP5 | 500 | 400 | 900 | 34,390 | 42,990 |
| NN-VOP10 | 1000 | 400 | 950 | 20,380 | 25,480 |
| NN-VOP20 | 2000 | 400 | 1100 | 40,690 | 50,870 |
| NN-VOP30 | 3000 | 400 | 2300 | 24,070 | 30,080 |
| NN-VOP40 | 4000 | 400 | 2500 | 55,570 | 69,460 |
| NN-VOP60 | 6000 | 400 | 3000 | 29,850 | 37,310 |
| NN-VOP80 | 8000 | 400 | 3200 | 66,320 | 82,900 |
10. How Much Is the Shipping Cost of Transformer Oil Purification Machine?
The shipping cost of Transformer Oil Purification Machine starts from $5,000 to $12,000.
11. Ordering & Preparation for Shipping
The Transformer Oil Purification Machine production is based on the customer’s order and it takes 7 to 10 weekss to be ready for shipping.
12. What Are the Porcess of Installation & Activation of Transformer Oil Purification Machine?
In addition to dispatching experts and face-to-face training, an installation and maintenance manual is sent to the customer:
– Appearance inspection of electric motors (visual).
– Checking the seals of the vacuum pump and the output pump (are they leaking or not).
– Checking the pump coupling and shaft.
– Check and close all drain valves and air valves.
– Ensuring the device is clean.
– Checking the earth cable and connecting it to the ground.
– Inspection of all routes to ensure that they are not open and have no leaks.
– Checking the screws of all the connecting flanges of the parts.
– We start the device as a test. If there is no vibration, noise, or abnormal temperature in the device, the device can be placed in the circuit permanently.
– Visual inspection of all cables and wiring.
– Checking the cables and wires inside the panel.
– Checking instruments.
– After completing and installing the device, the following tests should be done to find out whether their working condition is correct or not:
a) (HMI) is working or not
b) Visual inspection of equipment
c) Pressure and leakage test
d) Temperature test and analog and digital thermostat
13.Transformer Oil Purification Machine’s Standards & Codes
| Rules for construction of Pressure vessels | ASEME, SEC, VIII Div. I |
| Welding and brazing qualifications | ASME, SEC.IX |
| Standard specification for straight-beam ultrasonic examination of steel plate | ASTM-435/a435m |
| Standard practice for ultrasonic examination of heavy steel forging | ASTM a-388/a-388m |
| Pipe flanged fitting | ASME b 16.5 |
| Metallic gaskets for pipe flanges | ASME b 16.20 |
| Non-metallic gaskets for pipe flanges | ASME B 16.20 |
| Process Piping Welding Research Council | ASME b 31.3 |
| Local stresses in spherical and cylindrical shells | Welding Research |
| Sulfide stress-cracking resistant metallic materials for oilfield equipment. | NACE STD MR0175 |
| Uniform building code | UBC |
| Metallic Products-types Of Inspection Documents | ASME b 31.3 |
| Quality Management System | ASME b 31.3 |
14. Purchasing Process
Contacting the sales unit, sending the customer’s requests, designing and sending the design to the customer, approving the design by the customer, issuing a proforma invoice, approving the proforma invoice and paying the deposit by the customer, final settlement, sending the order to the customer.
Invex’s Transformer Oil Purification Machines are essential for maintaining the efficiency and longevity of transformers in the electric power industry. By controlling the oil condition, these machines help extend the transformer’s lifetime and reduce costs associated with oil replacement. Our advanced systems effectively remove contaminants such as copper catalysts, iron filings, moisture, and gases, ensuring the oil remains in optimal condition. Explore our solutions for electric power transmission, transformer maintenance, and oil quality control to enhance your operations. For more information on our purification process, system components, and maintenance strategies, visit our Contact page.