EirGrid wishes to procure a supplier of Power Quality/Transient Fault Recorders to be used on the 400 kV, 275 kV, 220 kV and 110 kV Transmission network in the Republic of Ireland. The recorders shall be installed in transmission stations, and their primary functions will be: Fault/Event recording in response to under, over and rate-of-change of voltage, current, frequency and active power in addition to remote manual and binary input triggers; Power Quality measurements, including flicker, unbalance and harmonics measurements up to and including the 50th harmonic; and Data streaming on a continuous basis for Phasor Monitoring Units (PMU) application.