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For transformers of different voltage grades, their requirements and standards for transformer oil are also different. For example, the higher the voltage grades of transformers, the higher the requirements for the breakdown voltage of transformer oil.
• Inspection indicators after oil purification:
Inspection Indicators |
Voltage grades of transformers |
||
500 |
220~330 |
66~110 |
|
Breakdown Voltage (KV) |
≥60 |
≥55 |
≥45 |
Moisture Content (ug/g) |
≤10 |
≤15 |
≤15 |
Gas Content (% V/V) |
≤1 |
≤1 |
-- |
Dielectric Loss Factor (90℃,%) |
≤0.2 |
≤0.5 |
≤0.5 |
• Recommended Number of Vacuum Stage based on Transformer Voltage Grades:
Transformer Voltage Grade |
Number of Vacuum Stage for Vacuum Transformer Oil Purifiers |
Vacuum Pumps |
Below 66 KV |
Rotary Vane Vacuum Pump |
|
Above 110 KV |
Rotary Vane Vacuum Pump + Roots Booster Vacuum Pump |
Note:
1) According to customer needs, vacuum pumps or roots pumps can also be added to meet specific needs and improve the efficiency of vacuum degassing and dehydration.
2) Double-Stage High vacuum type is equipped with an vacuuming interface for transformer evacuation operation. That is to realize the purpose of one machine with two functions.
Different customers and projects have different budget requirements for the Transformer Oil Filtration Machine, so we PURETECH provide a variety of configurations to meet the different budget needs of customers. The functions, effects and structures of the three configurations are the same, and the difference lies in the brand of the components used.
No. |
Configurations |
Price |
Description |
1 |
Economical type |
Low |
|
2 |
Superior type (Most recommended) |
Moderate |
|
3 |
Luxury type |
High |
|
From the aspect of cost-performance, the superior type is the most cost-effective type, which is also the type that PURETECH clients choose the most. In addition to the above three configurations, PURETECH can also provide customized services. For example, if the customer specifies the brand of vacuum pump or other components, we can also update the budget for you and prepare a quotation. For details, please contact the PURETECH sales team.
According to the needs of different working environments, customers can choose Skid-mounted type or Trailer-Mounted type, fixed or mobile, with or without rain cover, etc. For example, when for outdoor Transformer Oil Filtering work, it is recommended to use a mobile oil filtration machine with a weather-proof enclosure, or a fixed oil purifier to be installed in a truck provided by the customer.
Types |
Picture |
Description |
Standard type |
|
|
Metallic Enclosed type for outdoor service |
|
|
Trailer-mounted type with metallic weather-proof enclosure for outdoor service |
Single-axle mobile trailer Double-axle mobile trailer |
|
Explosion-proof type |
|
|
Different countries and regions usually have different requirements for the function or use of transformer oil purifiers. In order to meet the different needs of customers, we PureTech and our experienced technical team provide you with the most common customized options for reference, if you have other specific needs, you can also communicate with our sales staff to confirm.
|
Standard |
Optional |
Description |
Vacuum Chamber |
Standard- “T”-shape vacuum chamber |
Optional-Vertical vacuum chamber |
|
Vacuum Chamber |
Standard- “T”-shape vacuum chamber |
Optional-Double-layer vacuum chamber |
|
Manual/ Automatic Control |
Standard- Manually control type |
Optional- Automatic control with PLC and touch screen |
|
Interchangeable valves |
Standard-One inlet valve and one outlet valve |
Optional- Interchangeable valves |
|
Oil Inlet Pump |
Standard- Only oil outlet pump, Without oil inlet pump. Oil is drawn into the oil purifier by vacuum. |
Optional- Oil Inlet Valve with driven motor. |
|
Customers can choose online or offline tester according to their own needs. The online tester can be installed on PURETECH's transformer oil filter unit for online and real-time measurement.
Testing Instruments |
Standard OR Optional |
Pictures |
Description |
Online Digital Flow Meter |
Standard |
|
|
Online Moisture Content Tester |
Optional |
|
|
Online Digital Pirani Vacuum Gauge |
Optional |
|
|
Optional |
|
Please click here to continue reading Part III of Buying Guide for Transformer Oil Filtration Machines.
Name: PURETECH
Mobile:+86 17815389416
Tel:+86 17815389416
Whatsapp:+8617815389416
Email:sales@cqpuretech.com
Add:1 Xinmao Road, Beibei district, Chongqing, China