SFTS Highlights
COMA for 81 MW Installation
COMA for 11 kV critical national infrastructure
COMA for 11 kV critical national infrastructure
SFTS manage all aspects of 33 kV work on an 81 MW wind farm
COMA for 11 kV critical national infrastructure
COMA for 11 kV critical national infrastructure
COMA for 11 kV critical national infrastructure
SFTS are contracted to manage all aspects of the 11 kV network for several installations of national importance
SAP Support
COMA for 11 kV critical national infrastructure
SAP Support
SFTS are contracted to provide Senior Authorised Persons to a major renewables company for all of their sites.
21 MW Solar Farm Commissioning (33 kV)
Overview
SFTS were engaged at a very late stage in the commissioning phase of a 21 MW solar farm in northern Scotland which operated at 33 kV. SFTS were tasked with ensuring that the 33 kV network was fully commissioned and would meet strict DNO acceptance parameters.
Scope of Works
- 7 x 33 kV Transformers – full commissioning.
- 33 kV multi panel switchgear - full commissioning.
- Upload client designed relay settings.
- Injection testing of switchgear relays.
- IR & VLF testing of all 33 kV cables on the client side.
- Diagnosis, location and repair of 33 kV cable sheath fault.
- Replacement of 45m section of 33 kV cable including jointing.
- G99 testing witnessed by DNO.
- Commissioning Pack compilation.
Results
SFTS successfully commissioned all of the client's 33 kV network, solving several engineering problems encountered in the short space of time between engagement and completion, to meet the strict deadline set for DNO connection and energisation!
Cable & Switchgear Fault Repair & Testing (11 kV)
Overview
After a destructive failure occurred on the 11 kV tertiary circuit of a 400 kV transformer at the onshore substation of a 450 MW offshore wind farm, SFTS were commissioned to lead the fault repair.
Scope of Works
- Rapid mobilisation to site given criticality of site supplies
- Disconnection of 11 kV cable from both an 11 kV Ring Main Unit and the 11 kV transformer.
- New T-boot terminations installed at both ends of the 11 kV cable.
- Insulation Resistance and VLF test of new 11 kV cable section and switchgear bushings.
Result
A 450 MW wind farm returned to optimal operating conditions due SFTS expertise and timely intervention!
Cable Testing (33 kV)
Overview
SFTS were asked to test some 33 kV cables for a newly installed energy centre in West Central Scotland before first energisation.
Scope of Works
Suite of testing on the cables including
- VLF Tan Delta
- Partial Discharge diagnostic testing (HFCT, RF and ultrasonic)
- Detailed analysis and technical report for client
Result
Robust pre-energisation testing giving the client total confidence that their installation will stand up to the rigours of production.