Protection Solutions

The standard compliance for electrical protection in Australia is that all electrical equipment must be proven safe for use and meet AS/NZS 3820 requirements. 

An earth leakage relay is designed to trip when there is residual current flowing to the ground. This is usually caused by faults such as damaged insulation, age and wear of the equipment, or environmental factors such as moisture ingress, humidity or contaminants entering the system. 

An ELR (earth leakage relay) and an EFR (earth fault relay) are both protection devices utilised in electrical systems to ensure the safety of personnel and equipment during operation. However, ELRs are used to detect smaller leakage currents while EFRs are designed to detect larger earth fault currents.   

Both a relay and protective relay are utilised to control the flow of electricity in an electrical circuit. However, relays are primarily used to manage and automate devices and systems, while protective relays are designed to prevent equipment damage and ensure the safe operation of the electrical system.  

In Australia, neutral earthing resistors are required to comply to the AS/NZS 3000:2018 standard. This ensures that the electrical equipment is safe and reliable for use.