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Schneider électrique REL52002C (Easergy P3U30 Universal Protection Relay)
REL52002C est un relais de protection intégré numérique universel de l'Easergy P3U30 de Schneider Electric (anciennement PowerLogic P3U30) série. Conçu spécifiquement pour les moyennes- et systèmes électriques basse tension, il offre une protection complète, mesures, contrôle, et fonctions de communication.
1 Interprétation du code modèle
| Segment de code | Description |
| REL | Product category: Relais (protection relay) |
| 52002 | Product series and basic configuration: Easergy P3U30 platform, 3CT/1Io/4VT/16DI/8DO/RS485 |
| C | Configuration suffix: Digital input (DEPUIS) voltage class 220V AC/DC |
Full corresponding order code: P3U30-5AAA3BBAC (configuration standard)
2 Spécifications clés & Fonctions
2.1 Configuration matérielle
Entrées analogiques: 3 courants de phase (CT) + 1 courant résiduel (Io) + 4 tensions (Vermont)
Entrées numériques (DEPUIS): 16 chaînes, universal for 220V AC/DC
Digital outputs (FAIRE): 8 channels with watchdog function (reliable tripping under fault conditions)
Communication: RS485 (Modbus RTU); dual RJ45 Ethernet (CEI 61850) facultatif
Alimentation: Wide range 48–230V AC/DC
2.2 Fonctions de protection (ANSI Standards)
| Type de protection | ANSI Code | Description |
| Protection contre les surintensités | 50/51 | Instantané / definite time overcurrent; configurable inverse‑time characteristics |
| Protection contre les défauts de terre | 50N/51N | Zero‑sequence overcurrent protection, suitable for TN/TT systems |
| Surtension / Sous-tension | 59/27 | Phase‑/line‑voltage abnormality protection |
| Panne de phase / Phase reversal | 46 | Prevents motor reverse rotation or unbalanced operation |
| Protection contre les surcharges thermiques | 49 | Simulates motor thermal characteristics to prevent burnout |
| Protection de fréquence | 81 | Over‑/under‑frequency protection for distributed generation |
| Synchronism check | 25 | Ensures safe grid‑connection operation |
2.3 Mesures & Monitoring
Full electrical parameters: actuel, tension, pouvoir (active/reactive/apparent), facteur de puissance, fréquence
Energy metering: four-quadrant energy accumulation, class 0.5S accuracy
Harmonic analysis: voltage/current 2nd to 31st harmonics monitoring
Event logging: 1000 events with timestamp (1 ms resolution)
Enregistrement des défauts: built-in waveform capture before and after faults
3 Environnement opérationnel
Normes: CEI 61850, CEI 60255, GB/T 14598 and other international/national standards
Température de fonctionnement: -25°C ~ +70°C (conception à large température)
Température de stockage: -40°C ~ +85°C
Humidité: 5% ~ 95% (sans condensation)
Protection contre la pénétration: IP20 (panneau avant), suitable for panel mounting in switchgear
Vibration resistance: CEI 60068-2-6 (5–150Hz, 0.5g)
Applications typiques:
Moyen- and low-voltage distribution substations (10kV/0.4kV)
Industrial plant power systems
Distribution électrique pour bâtiments commerciaux
Renewable energy grid connection (PV, vent)
Motor control centers (Centre multicompte)
UPS input/output protection in data centers
4 Related Models in the Same Series (REL520xx)
| Modèle | Différence principale | DI Voltage | Communication |
| REL52002C | Modèle standard, 3CT/1Io/4VT | 220V | RS485 |
| REL52002 | Type de base, same configuration | 220V | RS485 |
| REL52010C | With dual LC (transformateurs de courant) | 110V | 2LC + RS485 |
| REL52016 | Ring terminals, DI 110V | 110V | RS485 |
| REL52020 | Ring terminals, DI 24V | 24V | RS485 + CEI 61850 |
5 Informations de commande officielles
Standard order code: REL52002C
Full configuration code: P3U30-5AAA3BBAC
Replacement reference: Can replace earlier PowerLogic P3 series protection relays
Accessoires:
Communication module: P3-COM-ETH (CEI 61850 Module Ethernet)
Extension module: P3-EXT-DIO (additional DI/DO expansion)
Local HMI: P3-HMI (local human-machine interface)
6 Modèles de remplacement & Compatibilité
6.1 Within-series Replacements
Lower DI voltage required: REL52020 (24VDI), REL52016 (110VDI)
Communication étendue: REL52025 (dual RJ45 Ethernet)
6.2 Cross-series Replacements
Advanced applications: SEPAM 20 série (medium-voltage systems)
Economy applications: Easergy P3U20 series (configuration simplifiée, 10DI/5DO)
7 Notes de mise en œuvre technique
- Montage: Standard 4U height, 19-inch rack mounting; front-or rear-wiring optional
- Câblage:
CT input: 5A/1A selectable (software configuration required)
VT input: 100V (line-to-line) / 57.7V (phase-to-neutral)
DI/DO: Phoenix terminals, screw or spring connection
- Mise en service:
Parameter configuration and monitoring via Easergy Studio software
Local USB and remote network debugging supported
Comprehensive self-diagnostics for easy maintenance
REL52002C is a full-featured, flexible universal protection relay suitable for protection and monitoring in various medium- et systèmes électriques basse tension, especially industrial applications requiring 220V digital inputs and RS485 communication.
Core Parameter Comparison Table – Schneider Electric Easergy P3U30 Series (REL520xx)
1 Basic Parameter Summary
| Modèle | DI Voltage | Communication | Entrées analogiques | DO Channels | Alimentation | Différence clé |
| REL52002C | 220V CA/CC | RS485 (Modbus) | 3CT+1Io+4VT | 8 | 48–230V AC/DC | Standard general‑purpose model, 220VDI, RS485 only |
| REL52002 | 220V CA/CC | RS485 (Modbus) | 3CT+1Io+4VT | 8 | 48–230V AC/DC | Identical hardware to C version, simplified suffix |
| REL52010C | 110V CA/CC | RS485+2LC | 3CT+1Io+4VT | 8 | 48–230V AC/DC | 110VDI, dual LC transformer interfaces |
| REL52016 | 110V CA/CC | RS485 (Modbus) | 3CT+1Io+4VT | 8 | 48–230V AC/DC | 110VDI, ring‑type terminals |
| REL52020 | 24À DC | RS485+IEC 61850 | 3CT+1Io+4VT | 8 | 48–230V AC/DC | 24VDI, supports IEC 61850 Ethernet |
| REL52025 | 220V CA/CC | Dual RJ45+IEC 61850 | 3CT+1Io+4VT | 8 | 48–230V AC/DC | 220VDI, dual Ethernet ports, premium communication |
2 Sélection des clés & Règles de remplacement
2.1 Voltage Class Replacement
Modèle original: REL52002C (220VDI)
Remplacement direct (only DI voltage differs):
110V systems → REL52016
24V low-voltage systems → REL52020
2.2 Communication Upgrade
RS485 only: keep REL52002C
IEC 61850/Ethernet required: REL52020 / REL52025
2.3 Non-interchangeable Cases
REL52010C with 2LC interfaces is for dedicated transformer connections and not for standard panels
Terminal types differ; cabinet wiring must match ring or standard terminals
3 Common Features (Across Series)
Protection: 50/51 surintensité, 50N/51N earth fault, 27/59 tension, 46 phase rotation, 49 thermal overload
Mesure: Énergie de classe 0,5S, 2–31 harmonics
Logging: 1000 time-stamped events, fault recording
Montage: Standard 19-inch 4U for panel installation
Software: Configured via Easergy Studio
Application Scenarios – Schneider Electric REL520xx Series
1 REL52002C (220VDI + RS485)
Most common and widely used standard model
10kV general distribution substations: feeder, incomer, bus tie, station transformer, capacitor protection
Standard MCC panels in industrial plants, motors for pumps, les fans, compresseurs d'air
0.4kV critical circuits in commercial buildings: centres commerciaux, bureaux, hôtels
Retrofit of old substations with only Modbus RTU for data upload
Municipal facilities: residential substations, streetlight power, small water pump stations
Caractéristiques: On-site 220V AC/DC control power, basic power monitoring only
2 REL52016 (110VDI + RS485)
For traditional high-voltage control circuits
Legacy substations and power plant auxiliary systems
Industrie lourde: huile, chimique, métallurgie (typically 110V DC control power)
Substation retrofits: reuse existing 110V secondary cables without rewiring
Mining and heavy machinery plant distribution protection
3 REL52010C (110VDI + RS485 + 2LC)
Special transformer configuration scenarios
Custom medium-voltage switchgear with dedicated LC transformer interfaces
Special circuits with integrated metering and protection
Industrial projects with fixed CT/VT wiring requirements
Rare in general projects; custom-engineered model
4 REL52020 (24VDI + CEI 61850)
Low-voltage automation & smart grid applications
Data center UPS input/output, precision power distribution
PV and wind turbine box-type substations, energy storage grid connection
Smart microgrids and distributed generation projects
Power distribution for automated production lines linked with PLC (24V low-voltage control)
Small smart power stations requiring IEC 61850 communication
5 REL52025 (220VDI + Dual Ethernet IEC 61850)
High-end smart power distribution
New smart substations, main distribution in intelligent industrial parks
Transport ferroviaire (metro/high-speed rail): traction substations, distribution d'énergie
Critical circuits at airports, ports, large venues
High-end projects requiring network redundancy, O à distance&M., centralized dispatching
Multi-device networking and centralized monitoring in control centers
General Industry Applications (Full Series)
Systèmes électriques: 10kV/35kV substations, switching stations, ring main units
Fabrication: métallurgie, chimique, paper, électronique, equipment production
Renewables: PV, énergie éolienne, energy storage, EV charging clusters
Infrastructure: centres de données, transport ferroviaire, hôpitaux, écoles, complexes commerciaux
Exploitation minière & eau: mine power, stations de pompage, wastewater treatment plant protection
