Product Core Brief
- Model: P142 (P40 Agile Series)
- Brand: Alstom / Schneider Electric / GE Grid
- Series: MiCOM P40 Agile
- Core Function: Executes directional overcurrent protection, earth fault detection, and auto-reclose schemes on distribution feeders.
- Type: Digital Feeder Protection & Management Relay
- Key Specs: 40TE case width, 5 CT inputs (1 A / 5 A), 8 binary inputs, 11 output relays
- Condition: New Original (New Surplus), not refurbished
- ⚠️ Discontinued; limited stock
Product Introduction
Engineers responsible for distribution switchgear protection know that replacing a numerical feeder relay demands precise current transformer secondary matching, terminal wire indexing, and communication profile mapping. The Alstom MiCOM P142 P40 Agile functions as a high-precision intelligent electronic device (IED) designed for feeder protection, managing multi-stage directional overcurrent logic, sensitive earth fault detection, and circuit breaker reclosing routines.
This unit provides a direct form-fit replacement for existing 40TE MiCOM installations operating in utility substations and heavy industrial distribution networks. Processing inputs via high-speed digital signal processors, it executes user-defined Programmable Scheme Logic (PSL) to drive trip matrices without external relays. Confirm backplane terminal pinouts and auxiliary voltage ratings prior to inserting a spare module into a live panel.
Key Selling Points & Differentiators
- Integrated Protection Suite: Combines multi-stage directional element controls, thermal monitoring, cold load pickup, and auto-reclosure functions within a compact 40TE enclosure.
- Bench-Tested Performance: Provided with secondary current injection test certificates, confirming timing curve (IDMT/DT) thresholds operate within ±5% tolerances.
- Field Flexibility: Software-configurable 1 A / 5 A current transformer inputs and adjustable optocoupler pick-up thresholds minimize spare unit variance across facilities.
- Application Boundary: Not recommended for primary high-impedance unit differential protection on large power transformers; specify the MiCOM P64x series for transformer differential schemes.
- Substation Compliance: Fully compliant with IEC 60255 protection relay performance standards and IEEE C37.90 electrical surge withstand limits.
Quality Transparency Strategy
- Incoming Inspection
- Traceability: Cross-check hardware ordering codes and serial plates against original manufacturer shipping manifests.
- Anti-Counterfeit Check: Inspect outer enclosure labels, terminal block moldings, and front-panel typography under magnification.
- Visual Audit: Verify rear terminal blocks display no bent connector pins, contact plating erosion, PCB trace heat marks, or casing cracks.
- Accessories: Confirm presence of secondary CT shorting bar assemblies, terminal covers, and mounting brackets.
- Live Functional Test
- Test Bench Setup: Mount the Alstom MiCOM P142 P40 Agile relay in a dedicated test rig interfaced with an Omicron secondary injection test set.
- Boot Verification: Apply nominal auxiliary DC voltage, observing front panel LED initialization sequences, LCD contrast, and watchdog contact pick-up.
- Communication Handshake: Connect via the front diagnostic port using MiCOM S1 Agile software to query error buffers and confirm internal self-test statuses.
- I/O & Load Simulation: Inject 1 A and 5 A secondary current signals across phase and earth CT channels, evaluating trip timing curves and relay contact closures during a continuous 24-hour test run.
- Documentation: Issue a formal Test Report containing secondary injection logs, timing results, and time-stamped video records.
- Electrical Parameter Tests
- Insulation Resistance: Conduct a 500 V DC megger test across isolated VT/CT circuits, binary inputs, and ground casing (>10 MΩ target).
- Ground Continuity: Measure ground path resistance from the main rear ground stud to the chassis frame (<0.1 Ω).
- Firmware / Configuration Verification
- Firmware Extraction: Query the internal software revision via MiCOM S1 Agile and record the exact build number.
- Physical Settings: Inspect and photograph rear hardware jumpers, documenting input voltage selection link configurations.
