Eng-Tips is the largest engineering community on the Internet
Intelligent Work Forums for Engineering Professionals
-
Congratulations waross on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
MV Non-SF6 Switchgear
- Thread starter AVR_1.0pu
- Start date
- Thread starter
- #3
Thanks dpc, I was thinking 11-33kV. We have a lot of sf6 here in UK, for ring mains and main distribution boards.
There is a trend towards non sf6 types due to the environmental issues associated with sf6.
I am fairly familiar with VCB's which are used a fair amount here too, but I was wondering if anyone has had any experience with these novel arc extinguishing mediums.
AVR
There is a trend towards non sf6 types due to the environmental issues associated with sf6.
I am fairly familiar with VCB's which are used a fair amount here too, but I was wondering if anyone has had any experience with these novel arc extinguishing mediums.
AVR
What's wrong with conventional air insulated / solid insulated switchgear in conjuction with VCBs? Most Euro manufacturers offer this design up to about 24kV.
The dry air gear you are referring to is a "compact" alternative to GIS gear, but I'm not sure if it goes higher than 24kV, but I'll stand to be corrected.
The SF6 gear at 11kV that you are probably referring to is mostly RMU (or similar) type gear and provides a compact solution. In these units, the quantity of gas used is quite small as it is normally only used for the breaking medium, rather than for insulation.
For 33(36)kV, GIS seems the economical solution offered by most.
The dry air gear you are referring to is a "compact" alternative to GIS gear, but I'm not sure if it goes higher than 24kV, but I'll stand to be corrected.
The SF6 gear at 11kV that you are probably referring to is mostly RMU (or similar) type gear and provides a compact solution. In these units, the quantity of gas used is quite small as it is normally only used for the breaking medium, rather than for insulation.
For 33(36)kV, GIS seems the economical solution offered by most.
- Thread starter
- #6
@ppedUK,
in North-east USA, I have worked with 33kV dry-air compact switchgear. We do consider GIS for 115kV and above when open-air is not feasible. But lately, Sf6 is becoming very challenging to get approved, and looking towards non-SF6 alternative for that voltage.
For original question, we do have many of dry-air compact switchgear. We use the term "Metal Clad Switchgear" or "Integrated metal clad switchgear". We have them for upto 33kV. Operation people sometime don't like it as it is compact and not much room to do when troubleshooting or part replacement is required. But overall, we see less maintenance for metal clad switchgear. We also started integrated switchgear enclosure with control room under same roof. GReat design and easy to deal with turn key service.
in North-east USA, I have worked with 33kV dry-air compact switchgear. We do consider GIS for 115kV and above when open-air is not feasible. But lately, Sf6 is becoming very challenging to get approved, and looking towards non-SF6 alternative for that voltage.
For original question, we do have many of dry-air compact switchgear. We use the term "Metal Clad Switchgear" or "Integrated metal clad switchgear". We have them for upto 33kV. Operation people sometime don't like it as it is compact and not much room to do when troubleshooting or part replacement is required. But overall, we see less maintenance for metal clad switchgear. We also started integrated switchgear enclosure with control room under same roof. GReat design and easy to deal with turn key service.
- Status
Similar threads
- Locked
- Question
- Locked
- Question