Ampcontrol’s ELV-PRO is a high performance, microprocessor based, wide bandwidth earth leakage protection relay that is capable of measuring and analysing power and switching frequency currents flowing in IT power systems.
The ELV-PRO uses patented technology (US20130258537) to characterise earth leakage currents giving superior fault discrimination. The ELV-PRO relay is designed for use in systems that may exhibit circulative earth currents and complex earth leakage currents typically associated with variable speed drives in mining environments.
The ELV-PRO is intended for use at transformer NER connection points as a BUEL Protection relay. The relay is not limited to be used in this configuration only, and can be utilised on any individual outlet if desired. This would allow greater earth leakage current data to be captured relating to a specific outlet, rather than the entire system connected to the transformers secondary that the NER is protecting.
The ELV-PRO provides data logging to assist in fault finding. On each event trigger, the relay stores system data 2 seconds before and 2 seconds after the event including system time, earth leakage current, phase current and zero crossing of the phase current.
Ethernet connection to the ELV-PRO relay provides the ability to monitor the device parameters and real time measured current from an internet browser. All data logs stored on the unit can also be viewed.