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- Core Model Correspondence
REL52012C is a specific model of Schneider PowerLogic/Easergy P3U30 Series Universal Protection Relay. Its standard part number is REL52012, and the corresponding complete product reference code is: P3U30-5ABA1BDAC
| Marking | Detailed Description |
| REL52012 | Schneider official material code (standard model) |
| REL52012C | Version with suffix “C”, generally refers to China market version or specific production batch |
| P3U30-5ABA1BDAC | Full product reference code containing all configuration information |
- Full Model Code Decoding (P3U30-5ABA1BDAC)
| Model Segment | Definition | Code Value | Detailed Explanation |
| P3U30 | Product Series | P3U30 | Universal protection relay for feeder and motor protection |
| 5 | Power Supply Type | 5 | 48-230V AC/DC wide-range power supply |
| ABA | Measurement Input Configuration | ABA | 4L (3CT+1Io) ring-type terminals + 4VT (100V/110V) voltage input |
| 1 | I/O Configuration | 1 | 16DI/4DO (without watchdog) |
| BD | Communication Configuration | BD | Extended communication configuration |
| AC | Digital Input Voltage + Communication Interface | AC | DI: 110-230V AC/DC wide range; Dual RJ45 Ethernet ports + RS485 serial port |
- Core Specification Parameter Table
| Parameter Category | Technical Specification | Remarks |
| Basic Information | ||
| Product Type | Universal Protection Relay | Suitable for feeder and motor protection applications |
| Standard REL Code | REL52012 (REL52012C is China version) | Official material part number |
| Electrical Parameters | ||
| Supply Voltage | 48-230V AC/DC | Wide voltage design compatible with global power grids |
| Measurement Input | 4L (3CT+1Io) ring terminals, 4VT (100V/110V) | Ring terminals ideal for high-current measurement |
| Digital Input (DI) | 16 channels, 110-230V AC/DC wide range | Opto-isolated with strong anti-interference capability |
| Digital Output (DO) | 4 channels, relay output | Contact rating: 5A/250V AC |
| Communication Performance | ||
| Communication Interface | 2×RJ45 Ethernet ports + 1×RS485 serial port | Supports network redundancy and remote monitoring |
| Supported Protocols | Serial: Modbus RTU, IEC 60870-5-101/103 | Fully compatible with industrial communication standards |
| Ethernet: IEC 61850, Modbus TCP, DNP3, Ethernet/IP | ||
| Mechanical & Environmental | ||
| Dimensions | 96×96×75mm | Standard panel mounting size |
| Mounting Type | Panel mounting / DIN rail mounting | Flexible for different control cabinet layouts |
| Operating Temperature | 0°C ~ 60°C | Industrial standard temperature range |
| Protection Class | IP40 (Front Panel) | Suitable for installation inside control cabinets |
- Meaning of Suffix “C”
The suffix “C” in REL52012C mainly indicates:
- Regional Version Identifier: Usually stands for dedicated version for China market, optimized in configuration for China power grid standards.
- Manufacturing Information: Produced by Schneider’s local factory in China (SSIC).
- Certification Adaptation: Specially certified for China market requirements (e.g. CCC certification) to comply with Chinese national standards.
REL52012C and standard REL52012 are completely identical in core functions and technical parameters, differing only in sales region, certification and manufacturing origin.
- Application Scenario Recommendation
| Application Scenario | Core Advantages | Adaptation Reason |
| Smart Substation (China Market) | Dual Ethernet + IEC 61850 support | Complies with China smart grid standards and facilitates system integration |
| Feeder Automation System | 4L ring terminals + extended communication | Adapts to high-current measurement; supports remote monitoring and fault diagnosis |
| Industrial Power Distribution System | Wide-range DI voltage + multi-protocol support | Fits complex factory voltage environments; compatible with various PLC and SCADA systems |
| International Projects (China Region) | China certified version + global standard compatibility | Meets local compliance requirements while supporting international communication protocols |
- Supplementary Information
- Hardware Compatibility: Fully consistent in physical dimensions and mounting method with all P3U30 series models; direct interchangeable installation available.
- Protection Functions: Equipped with more than 40 protection functions including overcurrent, earth fault, undervoltage, phase sequence reversal, overload, etc., complying with IEC 60255 standard.
- Firmware Upgrade: Supports remote firmware upgrade via Ethernet port; RS485 port available for local upgrade.
- Accessory List:
Front connector: Standard 9-pin spring terminal
Communication cable: RS485 shielded twisted pair (optional)
Ethernet cable: CAT5e/CAT6 industrial Ethernet cable (recommended)
