ERL Power Technologies

Tomorrow’s Smart Grid, Starting Today. Featuring the TESLA4000 Digital Fault Recorder (DFR), the industry leading device for capturing all fault data in Substations. ERLPhase also sell a wide range for protection relays for Transformer, Feeder, Bus Bar, Transmission protection. Also the new S Pro, Sub-Harmonic protection relay for use in Wind Farms.




ERL Phase Tesla 4000 Power System Monitoring Recorder

TESLA 4000 is an easy-to-use and cost effective, state-of-the-art, multi-time frame (simultaneous) digital fault recorder. Its integrated Phasor Measurement Unit (PMU) functionality streams synchrophasor data for wide area monitoring. Enabled with IEC 61850 protocol, TESLA has advanced communication capabilities that, together with its powerful recording features, provide the most versatile and complete monitoring of power  system health.


S-PRO Sub-Harmonic Protection Relay

ERL Phase S-Pro 4000

The S-PRO sub-harmonic protection relay protects generators, wind turbines, and SVC equipment from uncontrollable sub-harmonics which cause

  • Sub-Synchronous Torsional Interaction (SSTI)
  • Sub-Synchronous Control Interaction (SSCI) and
  • Ferro-resonance

The S-PRO monitors potentially harmful Sub-Synchronous Oscillation (SSO) in real time & detects Sub-Synchronous Resonance (SSR) in transmission lines with power controller interactions such as FACTS or HVDC lines, particularly those lines with series compensation and interconnected with wind farms.


B-PRO Bus Protection Relays

ERL Phase B-Pro 4000

The B-PRO relays provide low impedance differential protection for any bus bar configuration with CT saturation security, integrated breaker failure, overcurrent protection and SCADA control in a fully integrated solution. The B-PRO also provides control, automation, metering, monitoring, and high quality fault oscillography and sequence of events logging.


F-PRO Feeder Protection Relays

ERL Phase Sub F-Pro

The F-PRO 200 family of numerical multifunction relays provide complete feeder protection with a wide range of protection functions suitable for transmission, distribution and industrial applications. This broad selection of relay functionality and hardware options allow customers to choose the best suited and most cost-effective solution for each application. High reliability comes from robust and field-proven design, as well as self-monitoring hardware and a software watchdog.


L-PRO Transmission Line Protection Relays

ERL Phase Sub L-Pro 4000

The L-PRO is a digital, microprocessor-based line distance protection system that provides comprehensive distance based line protection for medium to extra-high-voltage transmission lines. Apply the L-PRO for high-speed distance and directional protection and complete control in multi-breaker applications typically found in ring or breaker-and-a-half substation arrangements.


T-PRO Transformer Protection Relays

ERL Phase T-Pro 4000

The IEC 61850 station bus embedded T-PRO relay provides complete 3-phase multi-winding transformer fault and overload protection, DFR-quality fault oscillography, sequence of event logging, trend recording, in a fully integrated protective relay solution, with advanced communications in a flexible cost-effective package.


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