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Vapour phase drying system for EHV trans, 1 PLC + PID control, 2 For 160MVA/220kV transformers, 3 Trolley loading capacity: 150T - details see: https://www.machineto.com/high-quality-vapour-phase-drying-system-for-ehv-transformers-10158844

High quality vapour phase drying system is mainly suitable for drying transformer bodies in extreme-high voltage than 110kV and big capacity.

Clear photo of vapour phase drying system for EHV transformers:

Technical features of vapour phase drying system for EHV transformers:

- Vapour phase drying system is equipped with build-in cascade evaporator, which can carry out distillation between two heating phases.

- There is an individual heat recovery device outside of tank, saving energy

- Water extraction quantity in each phase and total extraction amount can be recorded on time and displayed on computer screen. Water extraction curve of each intermediate pressure reduction phase and total water extraction amount curve can be drawn instantaneously. And water extraction rate of each intermediate pressure reduction phase can be calculated automatically.

- The flow of kerosene in the mixture of kerosene & water can be measured instantaneously and so the opening rate of the main control valve can be controlled accurately, but not only rely on tank pressure control.

- The end point can be measured automatically by computer. The process will be cut off automatically when the temperature of workpieces reaches 120°C±5°C, and tank pressure is less than 0.2mbar and water extraction rate is less than the set value.

- The whole process can be fully controlled automatically, and even can be operated unattended. The computer can monitor the process of product and display process parameters and curve of each phase. Various process curve and reports can be printed timely and backup automatically.

- Visible & audible alarm can be done automatically. And usual troubleshooting methods can be provided. Malfunction point and time can be recorded timely.

- Various parameters and the implementation state of program can be saved when power failure suddenly.

- Process parameters can be displayed and revised.

Process flow of vapour phase drying system for EHV transformers:

1) Loading transformer into autoclave

2) Vacuuming

3) Heating and reducing pressure for several times (under certain temperature and pressure, moisture contained in the insulation material will be evaporated out)

4) Reducing pressure of autoclave to less than 0.2mbar

5) Determining end point by dew-point sensor and keeping pressure less than 0.2mbar.

6) Releasing pressure and taking out transformers

Main technical data of vapour phase drying system for EHV transformers:

-- Dimension of autoclave (effective size): 4.5m x 6m x 9m (W x H x L) = 243M³

-- Suitable max. transformer capacity: 160MVA, 220kV

-- Max. loading capacity of trolley: 150tons

-- Final vacuity at the end of the fine vacuuming stage: <0.2mbar

-- Ultimate vacuity (unload, cold condition): 0.1mbar

-- Leakage rate (unload, cold condition): <5mbar.L/s

-- Max. temperature of kerosene vapor inlet: 135°C

-- Max. heating-up temperature: 125°C

--Temperature difference between any two points inside effective heating area: +/-3°C

--Temperature of autoclave wall during fine vacuum phase: 125°C~135°C

--Temperature of insulation material: 110°C~125°C

--Temperature of transformer body: 120°C

-- Duration for evacuating autoclave to 7mbar: 20min

-- Noise level: <80dB

Detailed configuration of vapour phase drying system for EHV transformers:

There are many detailed information on configurations of the vapour phase drying system. Kindly please contact me for details:

Name: Franks Cao (Mr.)

Mobile: 0086 139 6272 4758

Skpe: frankscao

QQ: 418738923

We, Nantong Zhenhuan Trade Co., Ltd., are specialized in transformer related machines for more than 9 years. We can provide you good quality vapour phase drying system for EHV transformers as well as good services. We have exported vapour phase drying systems for EHV transformers to worldwide already.