Utility workers & the risk of arc flash

May 4th, 2018

Arc flash accidents occur approximately 8 to 10 times each week in the UK. Unfortunately, many switchgears are left without arc flash protection, despite its common occurrence and destructive potential.

An arc flash protection system is made up of a trip relay, arc quencher and sensors. The sensor will detect the arc, which tells the protection relay. This relay then sends a trip command to the circuit breaker, which as a result of opening will eliminate the arc. For an extra level of protection, the arc quencher has the ability to absorb the arc fault by creating a low-impedance parallel path for the fault to follow, extinguishing the fault.

An arc flash is one of the most destructive electrical faults possible to have. Not only will it cause tremendous damage to equipment, but could also give life changing and even life-threatening injuries to any personnel within a close proximity.

There’s no denying the importance of ensuring staff are fully protected against arc flashes. Correct PPE is essential in helping to protect staff.

Thorne & Derrick International, the UK’s leading distributor of Arc Flash Clothing & Protection have published an article highlighting the risks to Jointers, Linesmen, SAP’s and Civil Engineers of arc flash incident.

Read more here: Can Arc Flash Clothing Save Utility Workers Lives?



Thorne & Derrick

THORNE & DERRICK are national distributors LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Product CategoriesDuct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV | Cable Cutting & Crimping Tools