The L-PRO 4000 Transmission Line Protection Relay by ERLPhase Power Technologies, a provider of protection relays and digital fault recorders, is now available for ordering. 

As a member of the 4000 series of protection relays, the L-PRO 4000 is a digital microprocessor-based line distance protection system which provides protection for medium to extra-high-voltage transmission lines. 

“Our customers have been eagerly anticipating availability of our next generation series of protection relays,” said René Midence, business unit manager for Protection Products at ERLPhase. “We are very pleased to be shipping this product and open to requests from new customers to evaluate the L-PRO 4000 in their own system.”

The IEC 61850 station bus embedded L-PRO 4000 provides comprehensive distance-based line protection, best-in-class DFR quality fault oscillography, standard ring bus capability, swing recording, event logging, SCADA control and metering.