ALSTOM P14DB11A330500A Controller – Distance Protection Relay | MiCOM P14D Series
Engineering Background
The ALSTOM MiCOM P14D series represents a generation of numerical distance protection relays engineered for transmission and sub-transmission networks operating at 110 kV and above. Developed under ALSTOM Grid (now GE Grid Solutions), the P14D platform integrates multi-zone impedance measurement, fault location, and communication interfaces into a single 19-inch rack-mountable unit, reducing panel footprint while consolidating protection and monitoring functions.
Product Positioning
The P14DB11A330500A is a fully configured variant of the MiCOM P14D distance protection relay. It is positioned as a primary line protection device for high-voltage transmission feeders, offering engineers a proven, IEC 60255-compliant solution with deterministic trip times and comprehensive self-supervision. This unit is sourced from verified surplus channels and is suitable for spares inventory, system expansion, or direct replacement of like-for-like units in existing ALSTOM/GE protection schemes.
Complete Technical Specifications
- Manufacturer: ALSTOM Grid (GE Grid Solutions)
- Series / Platform: MiCOM P14D
- Part Number / SKU: P14DB11A330500A
- Function: Numerical Distance Protection Relay (21 / 21N)
- Protection Zones: Up to 5 forward zones + 1 reverse zone
- Characteristic: Quadrilateral and Mho impedance characteristics (selectable)
- Rated Voltage (VT Input): 100 / 110 / 120 V AC (phase-to-phase)
- Rated Current (CT Input): 1 A or 5 A (model-dependent)
- Auxiliary Supply: 24–250 V DC / 100–240 V AC (wide-range SMPS)
- Frequency: 50 / 60 Hz
- Trip Time: <20 ms (Zone 1, typical)
- Fault Location: Integrated, ±1% accuracy
- Communication Ports: RS485 (rear), IEC 60870-5-103 / MODBUS RTU; optional IEC 61850 GOOSE
- Binary Inputs: 8 optically isolated inputs
- Output Relays: 7 configurable output contacts
- Mounting: 19-inch rack, 4U panel
- Operating Temperature: −10 °C to +55 °C
- Storage Temperature: −25 °C to +70 °C
- Humidity: 5–95% RH (non-condensing)
- Ingress Protection: IP52 (front panel)
- Standards Compliance: IEC 60255, IEC 61000 (EMC), EN 50263
- Weight: ~19 kg (as shipped)
- Dimensions (H × W × D): 177 × 483 × 225 mm (4U × 19″)
Proven Application Environments
- 110 kV – 500 kV transmission line primary protection
- Sub-transmission feeder backup protection (POTT / PUTT teleprotection schemes)
- Busbar-connected feeder protection in grid substations
- Replacement / spares for existing MiCOM P14D installations
- Retrofit projects upgrading electromechanical or first-generation numerical relays
- Power plant step-up transformer feeder protection
- Industrial HV networks (steel mills, petrochemical, mining)
Engineering Advantages
- Multi-zone quadrilateral characteristic – precise reach setting independent of fault resistance, reducing risk of under-reach on high-resistance faults
- Integrated fault locator – eliminates need for separate fault location equipment; reduces mean time to repair (MTTR)
- Comprehensive self-supervision – continuous hardware and software watchdog; relay issues alarm on internal failure without spurious tripping
- Wide auxiliary supply range – single unit covers both 110 V DC and 220 V DC substation battery systems
- IEC 61850-ready architecture – supports GOOSE messaging for high-speed inter-relay communication without copper wiring
- Disturbance recorder – 8 analogue + 16 digital channels, 1 kHz sampling; supports post-fault analysis without external DFR
- Password-protected settings – three-level access control prevents unauthorized parameter changes
System Architecture & Signal Flow
The P14DB11A330500A processes three-phase voltage and current inputs through anti-aliasing filters and a 16-bit ADC sampling at 1 kHz. The DSP core continuously computes positive-, negative-, and zero-sequence impedance phasors. Zone comparators evaluate measured impedance against configured reach polygons on every sample cycle. On detection of an in-zone fault, the trip logic evaluates teleprotection channel status (if configured) and issues a trip command to the output relay matrix within one power-frequency cycle. All events, waveforms, and setting changes are time-stamped via the IRIG-B or SNTP clock input and stored in non-volatile memory for retrieval via the front RS232 port or rear communication bus.
Sourcing & Quality Verification
- Source: Verified surplus from decommissioned utility substations and OEM overstock
- Inspection: Each unit undergoes visual inspection, firmware version check, and power-on self-test (POST) verification before dispatch
- Traceability: Serial number and firmware version documented; available on request
- Warranty: 90-day functional warranty against DOA; extended warranty available on request
- Packaging: Anti-static foam insert, double-wall carton; meets ISTA 2A transit testing requirements
- Export Compliance: HS Code 8537.10; standard commercial invoice and packing list provided
Procurement Process
- Confirm compatibility – provide your existing relay nameplate data or protection scheme drawing; our engineers verify fit-for-purpose
- Request quotation – contact [email protected] for volume pricing, lead time, and freight options
- Place order – purchase order accepted via this storefront, email, or bank transfer (T/T)
- Dispatch – units ship within 3–5 business days; DHL / FedEx / sea freight available
- Documentation – commercial invoice, packing list, and test record shipped with unit; CNAS calibration certificate available on request
Technical FAQ
Q: Is the P14DB11A330500A compatible with IEC 61850 Edition 2?
A: The base hardware supports IEC 61850 Edition 1 GOOSE. Edition 2 compatibility depends on firmware version; contact us with your firmware requirement before ordering.
Q: Can settings be transferred from an existing P14D unit?
A: Yes. Settings files created with MiCOM S1 Studio are portable across P14D variants with matching firmware. We recommend verifying the settings file version against the replacement unit’s firmware before commissioning.
Q: What is the typical lead time for this part?
A: In-stock units ship within 3–5 business days. If not in stock, typical sourcing lead time is 2–4 weeks.
Q: Do you provide commissioning support?
A: We provide remote technical support for settings verification and communication configuration. On-site commissioning services can be arranged through our partner network.
Q: Is a test report available?
A: A power-on self-test record is included with every shipment. Full secondary injection test reports are available at additional cost.
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