Arc Flash Incident Cross Boundary Isolations
During planned works by technicians to replace the main breaker on a WTG an arc flash event occurred. Initial investigations suggest there was a failure of the cross-boundary isolation.
RIDDOR TX Coil Failure Incident
A breakdown call was received for string 2 having no communications at a wind farm. The team got in touch with the HV Senior Authorised Person [SAP] from the Company to assist with fault finding as to why the HV had tripped. Each of the turbines on string 2 were checked to see which one had tripped, T12 was found to be off and upon further investigation, one of the coils on the transformer had blown.
LV Arc Flash Incident
An incident occurred on a site that resulted in an arc-flash and burns injuries to wind turbine technicians working to replace a faulty wind turbine 690V circuit breaker. At the time of the incident, safe systems of work were in place, including electrical isolations. A full investigation is underway to determine the root-cause of the incident.
Arc Flash Event
During planned service work on a WTG the AT of the party was removing isolations to Q3 and Q10 within the 1S1 cabinet at the convertor platform level. When the technician removed the Q3 isolation, the lockout device fell down into the cabinet, appearing to fall between a gap in the protective covers and coming into contact with live conductors causing an Arc Flash Event to occur.
Dropped object incident
A wooden pallet containing a load was being lifted back onto the racking, and as the Forklift Truck was being turned, the load tipped, causing the wooden pallet to fall to the ground.
Battery Energy Storage System Fire
An incident occurred on a battery energy storage system that resulted in extensive damage to the battery system and container due to fire.
Electrical Contact
Fault finding within the Hub Spinner area cabinet +A6. A technician received electric shock following application of isolations.
Electricity cable struck by excavator
An overhead 11kv electricity line was struck by arm of excavator. Operatives were backfilling trenches where fibre optic cables within ducts have been laid
HV Trip caused a T-Stop at WTG
A HV trip caused a T-stop at WTG 707. Technicians visited the turbine to investigate the fault following the HV trip. Upon arrival at the Nacelle they discovered damage to the Q7 cubicle. On further investigation the technicians found that an arc flash event had occurred within the Q7 cabinet.
Arc Flash Burn
A Senior Engineer suffered burns in his hands as a result of an Arc-Flash. The Engineer failed to work according to the correct work procedure and to disconnect the cables from the battery side before disconnecting the battery power cables from the BMS, resulting in an Arc Flash.
Crushed Finger - Suspension of Clifter
An incident involving a Clifter device was reported recently.
An employee tried to operated a Clifter device to move it further up the ladder but in doing so, his index finger got trapped.
Nitrogen bottle falling from crane hatch
A high potential near miss has been reported recently. During a maintenance operation while hoisting down the tools using the internal crane, a nitrogen bottle dropped through the crane’s hatch down to the ground.
Failed crane beam support bracket
The crane beam support bracket for the crane beam had failed, causing the beam and hoist to fall to the nacelle floor.
Rodent damage - LV Cables
Rodent damage occurred to the sheath of low voltage (LV) cables in the transformer section of a wind turbine packaged substation.
Wildfires
There has been a been a mainly prolonged dry spell across much of the UK&I. There have been reports of wildfire around the country. This bulletin acts as a reminder to the increased potential for wildfires.
Winter Conditions
This bulletin is issued to compliment the HSQE Bulletin 10/19 Winter Driving and focuses on winter conditions at the workplace.
Corona Virus Outbreak
Corona Virus outbreak in China. Stop germs spreading, wash your hands!
Winter Driving
Increased risk of RTCs and general winter conditions on construction and asset sites during winter months