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Key Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | ABB / ALSTOM / GE Vernova (MiCOM P140 Agile) |
| Model | P141 |
| Ordering Code | P141311A2P0460J |
| Product Type | Feeder protection and management relay |
| System Platform | MiCOM P14x Agile (P140 series) |
| Protection Functions | 3-phase overcurrent (50/51), earth fault (50N/51N), voltage-controlled overcurrent (51V), negative-sequence overcurrent (46), thermal overload (49), undervoltage/overvoltage (27/59), frequency protection (81), breaker failure (50BF), autoreclose (79) |
| Measurement | Phase current, voltage, power, energy, frequency |
| CT Input | 1 A or 5 A (typical) |
| PT Input | 57.7 V / 110 V / 115 V (typical) |
| Auxiliary Supply | 85–265 V AC/DC (typical) |
| Communications | RS485 (Modbus RTU), optional Ethernet (IEC 60870-5-103/104, DNP3.0); some variants support IEC 61850 |
| Event Recording | ≥1,024 time-stamped events (1 ms resolution); fault records with oscillography |
| Display | 128×64 dot-matrix LCD + LED indicators |
| Form Factor | 4U panel-mount (approx. ½ 19″ width) |
| Standards | IEC 60255, ANSI/IEEE C37.90, UL 508 |
| Operating Temp | −25°C to +70°C |
| Configuration Software | MiCOM S1 Studio / legacy DIGSI-compatible tools (verify exact tool for P14x) |
Product Introduction
The P141 sits at the entry level of the MiCOM P14x Agile feeder management family. It is not a transformer differential relay, not a motor protection relay, and not a line differential unit. Its job is straightforward: watch a feeder, trip fast on overcurrent or earth fault, reclose if the scheme allows, and give the control room enough data to figure out what happened.Engineers keep P141 units in service because the P14x platform is predictable. The protection logic is well documented, the communications integrate cleanly with SCADA and DCS systems, and the relay does not require constant battery replacement on newer GE Vernova-branded units. For brownfield substations and industrial MV switchgear, a tested P141 replacement is often the fastest path back to normal operation. Just do not assume every P141 has the same I/O or communication options — the suffix code matters.
Quality SOP & Tech Pitfalls
The Lab Report (SOP):
Each unit receives a physical and functional check. Visual inspection covers front-panel damage, connector integrity, correct P141311A2P0460J labeling, and seal condition. Then a live bench test: apply auxiliary power, verify boot sequence, check LCD/LED status, inject secondary current for overcurrent and earth-fault pickup, and confirm trip output operation. Communication ports are tested for Modbus/IEC response if the option modules are present. Event records and fault oscillography are verified. Finally, anti-static bag, moisture barrier, and rigid packing. Photos and a basic test report can be provided.The Engineer’s Warning (Pitfalls):
Two mistakes cause unnecessary headaches with P141 replacements. First, ignoring the option suffix. A P141 with Ethernet/IEC 61850 is not interchangeable with a basic RS485-only unit without SCADA rework. Second, CT/VT ratio mismatch. If the replacement relay has different CT or VT ratios programmed, the displayed currents and protection thresholds will be wrong even though the relay appears healthy. Always photograph the existing relay’s settings menu before removal — especially CT/VT ratios, protection setpoints, and communication addresses.
Installation & Configuration Guide
- Pre-Installation:
⚠️ Confirm whether the relay is tied to active trip circuits. If yes, disable trip outputs or follow your site’s protection withdrawal procedure before removal. Photograph all settings: CT/VT ratios, protection setpoints, communication addresses, I/O assignments, and time synchronization settings. - Removal:
Label all CT, VT, binary I/O, communication, and auxiliary supply wires. Remove terminal screws or disconnect plug-in terminals carefully. Release the mounting clamps and slide the relay out. - Installation:
Verify the replacement is P141 P141311A2P0460J. Seat it in the panel cutout and secure mounting clamps. Reconnect all wiring exactly as labeled. Double-check CT polarity and VT phasing. - Power-On & Testing:
Apply auxiliary supply. Verify display and LED status. Confirm CT/VT ratios match the existing configuration. Inject secondary current to verify overcurrent and earth-fault pickup. Test trip outputs under controlled conditions. Verify SCADA communication. Save and document all settings.
Compatible Replacement Models
| Compatibility | Model | Notes |
|---|---|---|
| ✅ Drop-in Replacement | MiCOM P141 (same option code) | Verify CT/VT ratios, communication modules, and firmware |
| ⚠️ Software Compatible | MiCOM P142 / P143 | P142 adds voltage/frequency protection; P143 adds differential. May require setting migration and SCADA rework |
| ❌ Hardware Mod Required | MiCOM P11x / P13x / ABB Relion 615 series | Different form factor, wiring, and configuration tools; not a direct swap |
Frequently Asked Questions (FAQ)
Is P141311A2P0460J an ABB or GE product?
The MiCOM P140 series originated under ALSTOM, passed through AREVA and GE Grid Solutions, and is now under GE Vernova. Older units may carry ABB or ALSTOM branding. The platform is the same P14x Agile family.What protection functions does P141 provide?
Three-phase overcurrent, earth fault, voltage-controlled overcurrent, negative-sequence overcurrent, thermal overload, undervoltage/overvoltage, frequency protection, breaker failure, and autoreclose.Can I replace a P142 or P143 with a P141?
Not without engineering review. P142 adds voltage and frequency protection; P143 adds differential protection. Downgrading may remove active protection functions.Does it support IEC 61850?
Some P14x variants support IEC 61850, but it depends on the option code. Confirm against the nameplate or order-code guide.Is this relay still available new?
The P140 Agile series is a mature platform. Stock circulates as new surplus or tested used. For current OEM availability, verify with GE Vernova.Do you provide test reports?
Yes. A basic test report can include model/serial verification, power-up status, protection function checks, communication tests, and photos. Final commissioning must follow your substation protection procedure.
