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Schneider P127AA1W1D3FB0 is a multifunctional digital protection relay from Schneider Electric under the MiCOM P127 series, pertencente à linha de produtos MiCOM Px20. É usado principalmente para proteção contra sobrecorrente e falha à terra em sistemas de energia de média e alta tensão., e é particularmente adequado para aplicações de proteção de alimentadores.
- Model Code Interpretation (based on MiCOM P127 ordering rules)
| Segmento de código | Significado | Descrição |
| P127 | Série de produtos | MiCOM P127 multifunctional three‑phase and earth fault protection relay with voltage and frequency protection |
| AA1 | Configuração de hardware | May indicate: |
| – 1st character (UM): Enclosure type / dimensões | ||
| – 2nd character (UM): Display type (standard backlit LCD, 2 lines × 16 characters) | ||
| – 3rd character (1): Specific function configuration | ||
| W1 | Power supply module | Wide‑range power supply, supporting 24–250V DC / 48–240V AC |
| D3 | I/O configuration | Digital input/output configuration; padrão 7 input points expandable by 5; multiple relay outputs |
| FB0 | Comunicação & extension | Communication protocols (Modbus RTU, DNP3, IEC 60870‑5‑103, etc.) and extended function configuration |
- Especificações Técnicas Principais
| Parâmetro | Detalhes |
| Protection functions | • Three‑phase overcurrent protection (ANSI 50/51) |
| • Earth fault protection (ANSI 50G/51G) | |
| • Directional protection | |
| • Voltage and frequency protection | |
| • Auto‑reclose (ANSI 79) | |
| • Cold load pickup function | |
| Current input | Dual rating: 1A or 5A CT (current transformer) |
| Voltage input | Suitable for voltage levels up to and including 66kV |
| Communication interface | Rear RS485 port, supporting multiple protocols |
| Dimensões de montagem | 4U chassis, 20TE or 30TE width, withdrawable design for easy replacement |
| Operating environment | Temperatura: –25°C to +70°C |
| Umidade: 5% para 95% (non‑condensing) |
- Recursos do produto & Aplicativos
Principais recursos
- Fully digital design: High measurement accuracy, comprehensive fault recording
- Configuração flexível: Logic programmable via MiCOM S1 Studio software
- User-friendly: Multilingual menus (including Chinese), intuitive LCD interface
- Alta confiabilidade: Industrial-grade design for harsh environments
- Strong communication capability: Supports multiple industry-standard protocols for easy SCADA integration
Aplicativos
Power distribution networks
Industrial power systems
Power generation facilities
Motor, transformer and busbar protection
- Related Information
The P127AA1W1D3FB0 differs from other models in the same series (such as P127BA0Z112FB0, P127AA0Z112FE0, etc.) mainly in hardware configuration, I/O points and communication functions. For more detailed technical documentation or quotation information, please contact Schneider Electric official or authorized distributors.
Complete Product List of Schneider MiCOM Series Protection Relays
- Series Classification Overview
The Schneider MiCOM series (now mostly categorized under Easergy™ MiCOM and PowerLogic™ MiCOM brands) is a full-range digital protection relay portfolio for power systems. It is divided into subseries including Px10 / Px20 / Px30 / Px40 / Px50 / Px60 / Px70 / Px80 / Px90, covering protection requirements for various electrical equipment from low voltage up to extra-high voltage.
- Detailed Product List (by subseries)
- MiCOM P10x Series: Basic Overcurrent Protection Relays
Core applications: LV/MV feeders, small transformers, basic overcurrent and earth fault protection for motors
Main models:
P111: Three-phase overcurrent and earth fault protection, including breaker failure protection
P112: Enhanced P111 with added directional protection
P113: Upgraded P112 with auto-reclose function
- MiCOM P12x Series: Multifunctional Overcurrent Protection Relays (with voltage/frequency protection)
Core applications: MV/HV feeders, bus sectioning, small transformer protection, dual power supply support
Main models:
P120: Basic overcurrent/earth fault protection, no voltage functions
P121: With directional overcurrent protection
P122: With auto-reclose function
P123: With directional protection and auto-reclose
P125: Multifunctional model with voltage/frequency protection
P126: With directional protection, auto-reclose and voltage/frequency protection
P127: Full-featured model (por exemplo, P127AA1W1D3FB0) with three-phase overcurrent, falha de terra, directional, voltage/frequency, auto-reclose, etc..
Mounting features: 4U chassis, 20TE/30TE width, withdrawable design
- MiCOM P13x/P14x Series: Feeder Management Protection Relays
Core applications: Comprehensive MV feeder protection and control, including advanced auto-reclose and synchrocheck
P13x series:
P131: Basic feeder management relay
P132: With auto-reclose
P133: With auto-reclose and synchrocheck
P14x series:
P141: Feeder management relay
P142: With integrated auto-reclose
P143: With auto-reclose and synchrocheck
P144: With auto-reclose and residual voltage input
P145: With auto-reclose, synchrocheck and enhanced control functions
- MiCOM P22x/P24x Series: Motor Protection Relays
Core applications: Comprehensive protection for all motor types (asynchronous/synchronous), incluindo sobrecarga, stall, falha de fase, falha de terra, etc..
P22x series:
P220: Standard motor protection
P225: Enhanced motor protection
P226C: Proteção do motor + general overcurrent protection
P24x series:
P241: High-performance motor protection
P242: With advanced diagnostics
P243: With communication and remote monitoring
- MiCOM P34x Series: Generator Protection Relays
Core applications: Comprehensive protection for small and medium generators, including stator/rotor protection, potência reversa, sobre/subtensão, etc..
Main models:
P341: Basic generator protection
P342: With differential protection
P343: With loss-of-excitation protection
P345: Full-featured generator protection with synchrocheck and auto-synchronization
P346: Enhanced protection for large generators
- MiCOM P43x/P44x Series: Distance Protection Relays
Core applications: Distance protection for MV/HV transmission lines, including phase-to-phase and earth fault distance measurement
P43x series:
P433: Basic distance protection, three-zone phase/earth distance
P435: With auto-reclose and directional elements
P437: With synchrocheck and voltage control
P439: Advanced model with graphical HMI
P44x series:
P441: Extended-function distance protection
P442: With high-frequency protection interface
P443: Line differential protection with optical fiber communication interface
- MiCOM P521/P532/P59x Series: Line Differential Protection & Interface Devices
Core applications: Line current differential protection, protocol conversion, GPS synchronization and pilot wire interfaces
Main models:
P521: Line differential protection relay
P532: Line differential protection + bay control unit
P591/P592/P593/P594/P595: Protocol converters, GPS synchronization and pilot wire interface devices
- MiCOM P63x/P64x Series: Transformer Differential Protection Relays
Core applications: Fast, selective short-circuit protection for power transformers and reactors, supporting multiple winding connections
Main models:
P631/P632/P633/P634: Standard transformer differential protection for various transformer capacities
P642/P643/P645: Enhanced transformer protection with non-electrical interface and advanced diagnostics
- MiCOM P72x/P74x Series: Busbar Protection Relays
Core applications: MV/HV/EHV busbar protection, including high-impedance differential and centralized busbar protection schemes
P72x series: High-impedance differential protection
P721: Single busbar protection
P722: Multi-busbar protection
P74x series: Centralized busbar protection
P741/P742/P743: For various busbar system sizes
P746: Scalable full-voltage-class busbar protection solution
- MiCOM P821/P841/P849 Series: Special Protection & Extension Devices
Core applications: Breaker failure protection, bay extension, I/O expansion and other auxiliary protection functions
Main models:
P821: Breaker failure protection relay
P841: Bay extension unit
P849: Compact I/O expansion device with flexible configuration
- MiCOM P92x Series: Tensão & Frequency Management Relays
Core applications: Power system voltage/frequency control, out-of-step detection, verificação de sincronização, etc..
Main models:
P921: Voltage/frequency protection relay
P922: With synchrocheck function
P923: With out-of-step detection and power swing blocking
P925: Full-featured voltage/frequency management device
- Product Naming Convention (example: P127AA1W1D3FB0)
| Segmento de código | Significado | Descrição |
| P127 | Série de produtos | MiCOM P127 multifunctional three‑phase and earth fault protection relay |
| AA1 | Configuração de hardware | Enclosure type / display type / specific function configuration |
| W1 | Power supply module | Wide‑range power supply (24–250V CC / 48–240V AC) |
| D3 | I/O configuration | Digital input/output point configuration |
| FB0 | Comunicação & extension | Communication protocols (Modbus/DNP3/IEC 60870‑5‑103) and extended functions |
- Diretrizes de seleção
- Select by application
Feeder protection: Prioritize P12x/P13x/P14x series
Proteção do motor: P22x/P24x series
Generator protection: P34x series
Transmission lines: P43x/P44x/P521/P532 series
Transformers: P63x/P64x series
Busbars: P72x/P74x series
- Select by functional requirements
Proteção básica: Choose models without voltage/frequency protection
Advanced applications: Choose models with auto-reclose, verificação de sincronização, directional protection, etc..
Communication requirements: Confirm support for Modbus, DNP3, CEI 60870-5-103, etc..
- Montagem & environment
Dimensões: 20TE/30TE/40TE width options
Fonte de energia: Wide-range (W1) or fixed voltage
Ambiente: Operating temperature-25°C to +70°C, IP rating suitable for site conditions
- Some early MiCOM P20 series products (por exemplo, P521/P821/P92x) have been gradually migrated to the Easergy P3/P5 series.
- Latest products support configuration and monitoring via Easergy Studio or MiCOM S1 Studio software.
- For selection, it is recommended to contact Schneider Electric or authorized distributors for the latest technical documents and quotations.
