Work of Configuration and Testing Autoreclose function of various Distance Relays at various substations under TandC Circle Haldwani

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Enabling and Integration of Auto-Reclose (AR) Function in Existing Distance Protection Relay (132 kV Line) • Verification of the existing 132 kV line distance protection relay hardware and firmware to confirm Auto-Reclose functionality. • Enabling AR logic and relevant settings in the relay configuration software (e.g., MiCOM S1 Studio, DIGSI 5, or EnerVista, as applicable). • Integration of AR logic with the existing protection scheme and coordination with breaker-failure (BFR) relay logic. • Ensuring AR sequence and timing comply with approved protection philosophy (e.g., single-shot, 1-phase or 3-phase reclose logic).

Provision of Auto-Reclose Control Circuitry with Breaker Status to Relay (Including Wiring, Terminals, and Mounting) • Development of inter-connection circuitry between the circuit breaker auxiliary contacts and relay I/O terminals for AR enable, dead-time, and reclaim-time logic. • Provision of additional terminals, ferrules, and labels inside the relay/control panel for identification and future maintenance. • Routing and termination of control wiring from breaker marshalling kiosk to relay panel as per approved drawings. • Verification of correct logic and status indication through continuity and simulation tests.

Configuration, Mapping, and Testing of Auto-Reclose Function (Including Secondary Injection and Commissioning) • Configuration and mapping of AR logic with trip, reclose, and lockout functions within the 132 kV relay. • Setting appropriate dead-time, reclaim-time, and shot count parameters as per system requirements and relay capabilities. • Testing of AR function using a secondary injection kit, verifying correct operation for single-phase and three-phase trip sequences. • Final commissioning of the AR scheme in coordination with the protection and operations teams. • Preparation and submission of complete test results, configuration files, and commissioning records.