SF6 gas treatment for 220 kV GIS station for Ban Chat Hydroelectricity

GIS: Gas insulated Substation/Swithgear
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Project: SF6 gas treatment for GIS 220 kV station for Ban Chat Hydropower (location in Ban Chat, Than Uyen, Lai Chau communes) (GIS: Gas insulated Substation/Swithgear)

Time: April 2022

1. Purpose: Performing SF6 gas services to help investors and contractors upgrade current transformers (TI), to improve station productivity and maximize plant efficiency

ABB Asia Co Ltd: prepare the following equipment: Compressor, Sf6 gas recovery machine, gas recovery machine, vacuum machine, specialized Sf6 gas filling machine, empty SF6 gas bottle, pure N2 nitrogen gas tank pure

2. Process/step of implementation:

  • Develop a construction plan, labor safety, approved by the investor and electricity owner
  • Check the safety of the construction area, hang warning signs
  • Check that the main contractor, the investor has cut off the power, closed the ground
  • Check if the connection ports of the GIS station are compatible
  • Implement 380V 3-phase power supply connector for mobile cabinets, to connect to construction machines
  • Take the step of draining all the SF6 in the pipes of the GIS station to be removed and lowered
  • Vacuum clean to ensure that the device is out of gas to ensure safe dismantling, no residual gas is released into the environment
  • Contractors and firms carry out dismantling of GIS pipes and equipment, repair, maintenance, and re-installation
  • ABB Asia, perform 1st to 2mb vacuum suction, vacuum pressure soak for 6 hours, to check if there is pressure drop
  • Perform N2 to 3 bar filling, soak, 2h
  • Drain N2 from the device, then continue to vacuum down to 1mbar, and pressurize for 3 hours
  • Check and monitor vacuum pressure
  • Fill with SF6 Gas up to 6 bar, as required by the manufacturer
  • Sign the acceptance test record with the contractor and investor

Summary: All processes are carried out within 7 working days, labor safety requirements, labor protection, experts and technicians perform on the basis of the approved plan, and adjust at the site at the request of the manufacturer and the investor. The N2, Sf6 gas cylinders are all tested, the pressure equipment such as the compressor’s pressure vessel must be tested. Experts and technical workers must be trained and issued with electrical safety cards and level 3 occupational safety cards.

Here are some pictures from the project

ABB Asia Co. Ltd.  +84 902 336 426 provides the following services:

1/ New construction, installation, maintenance of substations from 22kV-110kV, underground cable 22-110kV.

2/ Repair medium voltage cabinets (RMU) 22kV- circuit breakers up to 500kV.

3/ Construction and installation of gas supply works, tanks, liquid gas tanks, supply stations, gas filling, liquefied gas

4/ Service of suction, recoverry,  filtration and filling of SF6 gas

5/ Provides ultra-pure gas, calibration gas, multi-component mixing gas up to ppm.

6/ Construction, installation and maintenance of refrigeration systems, cold rooms, clean rooms, central air conditioning systems

Checking leak on RMU ABB brand in Viet nam, then fix it for client.

ABB Asia Co. Ltd.

North Vietnam

  • Vinhomes Ocean Park Gia Lam., Ha noi

Central Viet nam

  • Hai Linh ward – Nghi Son city–Thanh Hoa Pro.

South Viet nam

  • 11A Hong Ha -Tan Binh Dis. – Ho Chi Minh
  • My Xuan ward – Phu My city – Vung Tau

Tel/zalo/whatsapp: +84 902 336 426 (zalo/whatsapp)

Email 1: sales@kattashop.com

Email 2: abbasia.co.ltd@gmail.com

Website 1: https://www.abbasia.asia (Global)

Website 2: https://www.kattashop.com (Viet nam)

Website 3: https://www.vietxuangas.com.vn (Viet nam)

Youtube Chanel 1: https://www.youtube.com/channel/UC1PRzMgPNbqyJRP2pKSuxsA

Youtube Chanel 2: https://bit.ly/3bn2HYU

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