Webfil make over current and earth fault relay series are software based, non directional, time graded, phase and earth fault inverse time current/high set/definite time protection relays. They are suitable for over current, earth fault protection schemes in power distribution systems and find wide application in protection of generators, transformers, feeders, capacitors, etc.

The software based state of the art design of the relays offers a wide range of field selectable IDMTL trip-time / definite trip time characteristics. They incorporate "high-set" as an optional feature and can operate with wide auxiliary supply range.

The compact modular design in draw out case and flush mounting construction offer simplicity and ease of installation and maintenance.

• CPRI, Bangalore and National Test House, Kolkata certified
• Integration of multiple protective functions into one compact housing.
• High accuracy and operational flexibility due to digital processing.
• Functional reliability due to continuous self monitoring of software and hardware.
• Simple setting and selection procedure through DIP switches.

• Microcontroller based state of the art design.
• Digital Filtering of analog signal to suppress high frequency harmonics and transient DC.
• User selectivity of time current characteristics. 3 sec Normal inverse, 1.3 sec Normal inverse , Very Inverse, Extreme Inverse
• User Selectivity of IDMTL & high set operation.
• Wide setting ranges for over current, earth fault, time multiplier & Instantaneous trip setting.
• Wide range of auxiliary supply , both AC & DC range
• High range of accuracy in all setting ranges.
• Low burden.
• Convenient visual indication for OC, EF and trip condition.
• Enhanced flexibility with 1A / 5A CT rating selection in same unit [Optional]
• Compliance to IEC60255, IEC60068, IS3231, BS142 standards.

• Protection for overhead & underground feeders.
• Protection for A/C machines.
• Backup protection for transformers.
• Protection for Generators, Capacitors.

• PR-1P-O Single pole phase overcurrent relay
• PR-1P-OI Single pole phase overcurrent relay with high set.
• PR-1P-E Single pole earth fault relay..
• PR-1P-EI Single pole earth fault relay with high set.
• PR-3P-OE Triple pole 2 phase overcurrent and earth fault relay.
• PR-3P-OEI Triple pole 2 phase overcurrent and earth fault with high set relay
• PR-3P-OIEI Triple pole 2 phase overcurrent with high set and earth fault with high set relay.
• PR-4P-OE Four pole 3 phase overcurrent and earth fault relay
• PR-4P-OEI Four pole 3 phase overcurrent and earth fault with high set relay.
• PR-4P-OIE Four pole 3 phase overcurrent with high set and earth fault relay.
Four pole 3 phase overcurrent with high set and earth fault with high set relay   [Universal model – can be configured for all models and versions.