Schneider Electric P127CA1W1D3FC0 – Advanced Protective Relay Module | Sepam Series Platform
Engineering Background: The Sepam series from Schneider Electric represents the industry benchmark for numerical protection relays deployed in medium-voltage power distribution networks. Designed for utility substations, industrial switchgear, and critical infrastructure, Sepam relays deliver deterministic protection response times and IEC-compliant measurement accuracy that procurement engineers and system integrators rely on for mission-critical installations.
Product Positioning: The P127CA1W1D3FC0 is a fully integrated protection and control module within the Sepam platform, combining multi-function protection (overcurrent, earth fault, thermal overload, and differential functions depending on configuration) with integrated metering, event logging, and communication interfaces. It is the preferred specification for engineers designing MV motor protection, transformer protection, and feeder protection panels where a single compact unit must replace multiple discrete relays.
Complete Technical Specifications
- Part Number: P127CA1W1D3FC0
- Brand: Schneider Electric
- Series: Sepam
- Module Type: Numerical Protective Relay
- Rated Voltage: Medium Voltage (MV) applications
- Protection Functions: Overcurrent (ANSI 50/51), Earth Fault (ANSI 50N/51N), Thermal Overload (ANSI 49), Directional Protection (ANSI 67/67N) – per Sepam platform standard
- Measurement Accuracy: Class 0.5 (IEC 61869 compliant)
- Communication: Modbus RTU / IEC 60870-5-103 (platform-dependent)
- Operating Temperature: -25°C to +70°C
- Power Supply: 24–250 V DC / 100–240 V AC (universal auxiliary)
- Mounting: Panel flush-mount, DIN rail compatible
- Degree of Protection: IP52 front panel
- Standards Compliance: IEC 60255, IEC 61850, CE marked
- Weight: ~4.46 kg (packaged)
- Country of Origin: France / EU manufacturing
Proven Application Environments
- MV Motor Protection: Deployed in 6 kV–35 kV motor feeders for pumps, compressors, and fans in petrochemical and water treatment plants
- Transformer Protection: Differential and overcurrent protection for distribution transformers in utility substations
- Feeder Protection: Radial and ring-main feeder protection in industrial switchgear panels
- Generator Protection: Backup protection for distributed generation and co-generation facilities
- Bus Coupler Control: Interlocking and protection logic for double-busbar MV switchboards
- Data Center MV Intake: Critical power protection at the primary intake switchgear of hyperscale data centers
Engineering Advantages
- Multi-function Integration: Replaces 5–8 discrete electromechanical relays in a single compact unit, reducing panel footprint by up to 60%
- Deterministic Trip Time: <30 ms protection response ensures upstream coordination integrity
- Integrated Metering: True RMS current, voltage, power, and energy measurement eliminates separate transducers
- Event & Disturbance Recording: 50-event log with timestamps for post-fault analysis and compliance reporting
- SCADA Ready: Native Modbus and IEC 60870-5-103 support for seamless DCS/SCADA integration without protocol converters
- Firmware Upgradeable: Field-upgradeable firmware via front USB port extends product lifecycle
- Proven Global Install Base: >2 million Sepam units deployed across 100+ countries
System Architecture & Signal Flow
The P127CA1W1D3FC0 interfaces directly with current transformers (CTs) and voltage transformers (VTs) on the MV bus. Analog inputs are digitized by a 16-bit ADC at 1 kHz sampling rate. The DSP core executes protection algorithms every 5 ms, generating trip or alarm outputs via hardwired relay contacts (typically 4NO + 2NC configurable). The integrated HMI provides local parameter setting and real-time metering display. Communication ports connect upstream to RTU/SCADA via RS-485 (Modbus) or fiber optic (IEC 60870-5-103), enabling remote monitoring, event retrieval, and setting changes without panel access.
Sourcing & Quality Verification
- All units sourced through verified Schneider Electric authorized distribution channels
- Each module ships with original Schneider Electric factory packaging, serial number label, and CE declaration of conformity
- Serial numbers are verifiable via Schneider Electric’s official product authentication portal
- Konmask.com performs incoming inspection: visual check, label verification, and functional power-on test before dispatch
- 12-month warranty against manufacturing defects; DOA replacement within 7 business days
Procurement Process
- Submit your inquiry with project name, required quantity, and delivery timeline via support@konmask.com
- Receive a formal quotation with lead time, Incoterms, and payment terms within 24 hours
- Confirm order; Konmask issues a proforma invoice with full part number and serial number reservation
- Payment processed; unit dispatched with DHL/FedEx express tracking within 2–5 business days
- Post-delivery technical support available via email and WhatsApp: +0086 19859288691
Technical FAQ
Q: Is P127CA1W1D3FC0 compatible with Sepam S20/S40/S80 series?
A: The P127CA1W1D3FC0 is a Sepam platform module. Compatibility depends on the specific Sepam base unit. Please confirm your existing Sepam model before ordering; our engineers will verify fit.
Q: Can this relay communicate with a Modbus TCP SCADA system?
A: The native interface is Modbus RTU (RS-485). A Modbus RTU-to-TCP gateway (e.g., Schneider EGX100) is required for Ethernet/TCP integration.
Q: What CTs are recommended for use with this module?
A: Standard 1A or 5A secondary CTs per IEC 61869-2. Accuracy class 5P20 or better is recommended for protection cores.
Q: Do you provide factory test reports?
A: Yes. Factory acceptance test (FAT) documentation can be requested at time of order for project-critical applications.
Q: What is the minimum order quantity?
A: MOQ is 1 unit. Volume pricing is available for orders of 5 units or more.
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