Interpretazione del codice modello
| Segmento di codice | Descrizione |
| EOCR | Series logo, motor protection relay series under Schneider (Former SAMWHA Korea) |
| SS | Basic series code, economical electronic overcurrent relay platform |
| D | Function upgrade code, Digital display version, different from LED indicator type of traditional SS series |
| 30 | Current specification code, rated protection current range: 3-30UN, built-in through-type CT for direct wiring |
| S | Control power supply code: universal wide voltage 24-240V AC/DC; Type W is dedicated for 380-440V AC |
Posizionamento centrale:
EOCRSSD-30S is a compact digital comprehensive motor protection relay, featuring three core protections: sovraccarico, phase loss and stall. It is applicable for motors with current 3-30A and compatible with 24-240V wide-voltage control power supply.
- Parametri delle specifiche principali
| Categoria | Specifiche dettagliate | Osservazioni |
| Parametri di base | ||
| Numero d'ordine | EOCRSSD-30S (Schneider SKU: 0015874) | Standard universal model worldwide |
| Tipo di protezione | Electronic overcurrent relay / Motor protector | Replace combination of traditional thermal relay and ammeter |
| Installazione | 35Montaggio su guida DIN da mm / Panel mounting | Struttura compatta, salvaspazio |
| Dimensione (L×A×P) | 56mm×78mm×120mm | Fully compatible with installation size of EOCR-SS series |
| Temperatura operativa | -20℃ ~ 60℃ | Adapt to temperature difference changes in industrial environment |
| Specifiche elettriche | ||
| Current Protection Range | 3-30UN (direct wiring) | External CT is required for current over 60A |
| Controllare l'alimentazione | 24-240V CA/CC (50/60Hz) | Wide voltage design, fit for various control systems |
| Working Frequency | 50/60Hz | Universal power frequency for global use |
| Output Contacts | 1NO + 1NC passive contacts | 95-96 (NC), 97-98 (NO) |
| Capacità di contatto | CA 250 V/5 A, DC 30V/5A | Meet demands of conventional control circuits |
| Funzioni di protezione | ||
| Protezione da sovraccarico | Regolabile (0.1~100s), support I²t inverse time characteristic | Set via O-TIME parameter |
| Protezione dalla perdita di fase | Quick action within 4 secondi | Trigger when three-phase unbalance degree>20% |
| Stall Protection | Adjustable startup delay (D-TIME), minimum 0.2s quick tripping | Suitable for instantaneous protection during motor startup |
| Funzione di visualizzazione | 7-segment LED digital tube | Real-time display of operating current and fault code |
| Reset Mode | Ripristino manuale (RESET button) / Electric reset | Easy recovery after troubleshooting |
| Precisione & Affidabilità | ||
| Measuring Accuracy | ±1% | Higher than traditional thermal relay (±10%) |
| Tempo di risposta | minimo. 0.2S (protezione dallo stallo) | Effectively prevent motor damage |
| Fault Record | Check the latest 3 fault records | Convenient for quick fault location |
| Classe di isolamento | Classe II | High safety protection level |
- Difetti comuni & Maintenance Solutions
3.1 Fault Codes & Risoluzione dei problemi
| Codice errore | Fault Type | Possibili cause | Soluzioni |
| O-C | Overload Tripping | 1. Excessive motor load | 1. Check load and eliminate mechanical jamming |
| 2. Too small O-TIME setting | 2. Appropriately increase O-TIME value | ||
| 3. Abnormal power supply voltage | 3. Measure three-phase voltage to ensure balance | ||
| P-P | Phase Loss / Open Phase | 1. Broken or loose power wire | 1. Check circuit connection and fasten terminals |
| 2. Burned contactor contacts | 2. Replace faulty contactor contacts | ||
| 3. Motor winding failure | 3. Measure insulation resistance of motor winding | ||
| S-C | Stall / Blockage | 1. Instant stall during motor startup | 1. Inspect mechanical transmission system |
| 2. Too short D-TIME setting | 2. Appropriately extend D-TIME value | ||
| 3. Stuck mechanical load | 3. Remove load jamming failure | ||
| Nessuna visualizzazione | Power Failure | 1. Control power disconnected | 1. Check power wiring |
| 2. Power voltage out of range | 2. Measure input voltage (24-240V) | ||
| 3. Blown internal fuse | 3. Replace internal fuse | ||
| Abnormal Display | Electromagnetic Interference | 1. Close to high-power inverter / electric welder | 1. Keep away from interference sources or add shielding measures |
| 2. Cablaggio allentato | 2. Inspect and fasten all wiring | ||
| 3. Firmware error | 3. Restore device to factory settings |
3.2 Daily Maintenance Schedule
| Ciclo di manutenzione | Maintenance Items | Punti Operativi |
| Quotidiano | Ispezione visiva | Clean panel and heat dissipation holes, check normal LED display |
| Settimanale | Ispezione del cablaggio | Check loose terminals and oxidation phenomenon |
| Mensile | Parameter Verification | Confirm O-TIME and D-TIME conform to motor rated values |
| Trimestrale | Prova di funzionalità | Simulate overload and phase loss faults to verify protection accuracy |
| Yearly | Comprehensive Inspection | Check aging of internal components, update firmware if necessary |
- Full EOCRSSD Series Model List
The EOCRSSD series has 3 basic models covering current range 0.5-60A to meet protection demands of motors with different power.
| Modello | Current Protection Range | Controllare l'alimentazione | Caratteristiche principali | Potenza motore applicabile (380V) |
| EOCRSSD-05S | 0.5-6UN | 24-240V CA/CC | Special for low current, direct wiring | 0.18-3kW |
| EOCRSSD-30S | 3-30UN | 24-240V CA/CC | General medium current type, direct wiring | 1.5-15kW |
| EOCRSSD-60S | 5-60UN | 24-240V CA/CC | General high current type, direct wiring (External CT required above 60A) | 3-30kW |
Nota: The whole series supports overload, phase loss and stall protection; independent adjustable startup delay (D-Time) and overload action time (O-Time); LED digital display for operating current and fault causes.
- Cross-brand Product Comparison
| Comparison Items | Schneider EOCRSSD-30S | Siemens 3RB2026-1KB0 | ABB CM-MSS.61S | Omron K8DS-PH1 |
| Intervallo corrente | 3-30UN | 2.5-32UN | 0.1-40UN | 3-30UN |
| Controllare l'alimentazione | 24-240V CA/CC | 24-240V CA/CC | 24-240V CA/CC | 24-240V CA/CC |
| Funzioni di protezione | Sovraccarico, Phase Loss, Stall | Sovraccarico, Phase Loss, Stall | Sovraccarico, Phase Loss, Stall, Phase Unbalance | Sovraccarico, Phase Loss, Stall |
| Modalità di visualizzazione | 7-segment LED digital tube | LED indicator light | Display digitale | LED indicator light |
| Output Contacts | 1NA+1NC | 1NA+1NC | 1NA+1NC | 1NA+1NC |
| Grado di precisione | ±1% | ±2% | ±1% | ±2% |
| Dimensioni di installazione | 56×78×120mm | 55×78×118mm | 56×78×120mm | 55×78×118mm |
| Fascia di prezzo | Medio (Di 370 RMB) | Alto (Di 500 RMB) | Alto (Di 480 RMB) | Medio (Di 350 RMB) |
| Vantaggi fondamentali | Intuitive digital display, fault record, 1:1 replacement for SS series | Brand premium, excellent system integration | Phase unbalance protection, alta precisione | Conveniente, velocità di risposta rapida |
- Air Shipment Compliance & Informazioni sulla certificazione
6.1 Air Shipment Compliance Judgment
Categoria di prodotto: Electrical and electronic equipment (No built-in lithium battery / super capacitor)
Numero ONU: Non richiesto (Non-dangerous goods)
Shipping Restrictions: No special restrictions, deliver as general cargo
Packaging Requirement: Adopt anti-static packaging to avoid static damage to internal components during transportation
6.2 Informazioni sulla certificazione
| Certification Type | Norma di certificazione | Applicable Scope | Requisiti chiave |
| Certificazione CE | IN 60947-4-1 (Sicurezza elettrica) | EU Market | Comply with Low Voltage Directive (LVD) and EMC Directive |
| IN 61000-6-2 (EMC Immunity) | |||
| Certificazione UL | UL 508 (Industrial Control Equipment) | North America Market | Meet North American electrical safety standards |
| CSA Certification | CSA C22.2 No.14 (Control Equipment) | Canada Market | Conform to Canadian safety standards |
| IEC Certification | CEI 60947-4-1 | Global Market | Comply with standards of International Electrotechnical Commission |
Nota: CE marks and certification numbers are marked on product body and outer package. Technical documents shall include test reports, risk assessment reports and Declaration of Conformity (DoC), which shall be kept for at least 10 anni.
- Formula di selezione & Quick Memorization Rules
7.1 Formula di selezione
Calculate motor current first, match EOCRSSD properly;
05 stands for 0.5-6A, 30 covers 3-30A;
60 reaches 60A, match external CT for higher current;
Select S/W according to control power, S means 24-240 ampia tensione;
Three core protections: sovraccarico, phase loss and stall;
Easy fault checking via digital display, convenient DIN rail installation.
7.2 Quick Memorization Rules
Corrispondenza attuale: Rated motor current shall be within 30%-80% of protector range, avoid boundary value affecting accuracy
Voltage Selection: Prioritize Type S (24-240V CA/CC) control power for stronger compatibility
Impostazione dei parametri:
O-TIME: Impostato 10-20 seconds when current is 1.2 times motor rated current
D-TIME: Set as motor startup time plus 2 secondi
Replacement Rule: Realize 1:1 direct replacement for traditional EOCR-SS series and thermal relays without changing installation size and wiring
- Applicabile & Scenari inapplicabili
Scenari applicabili
- General Industrial Motors: Protection for water pumps, tifosi, compressors and other common equipment
- Piccole linee di produzione: Single motor control loop requiring visualized fault display
- Renovation Projects: Replace traditional thermal relays to improve protection precision and convenience
- Harsh Working Environment: Temperature range -20℃~60℃, suitable for most industrial sites
- Multi-voltage System: 24-240V wide voltage adaptation, fit for transnational equipment and complex power supply environment
Scenari inapplicabili
- High-precision Control: Intelligent control system needing 4-20mA analog output or communication function (Recommend EOCR-E series)
- Extra-high Current Motor: Current over 60A without space for external CT installation (Recommend EOCR-3DM2 series)
- Special Protection Demand: Occasions requiring earth protection, leakage protection or phase sequence protection (Recommend EOCR-DS1 series)
- Explosion-proof Environment: Hazardous areas needing explosion-proof certification (Choose dedicated explosion-proof protectors)
Full Series Model List of Schneider EOCR Digital Motor Protectors
- Series Classification Overview
Schneider EOCR digital motor protectors are divided into three categories by function positioning: Tipo economico, Multifunctional Digital Type and Intelligent Type, covering current range 0.5-800A to meet various industrial demands.
- Economical Digital Protectors (EOCR-SS/SSD Series)
2.1 EOCR-SS Series (LED Indication)
| Modello | Intervallo corrente | Controllare il potere | Ordine n. | Caratteristiche principali | Applicable Power (380V) |
| EOCR-SS05S | 0.5-6UN | 24-240V CA/CC | 15872 | Overload/Phase Loss/Stall protection, Indicazione LED | 0.18-3kW |
| EOCR-SS30S | 3-30UN | 24-240V CA/CC | 15873 | Same protection functions | 1.5-15kW |
| EOCR-SS60S | 5-60UN | 24-240V CA/CC | 15874 | Same protection functions | 3-30kW |
| EOCR-SS05W | 0.5-6UN | 380-440V e | 15875 | Dedicated 380V control power | 0.18-3kW |
| EOCR-SS30W | 3-30UN | 380-440V e | 15876 | Dedicated 380V control power | 1.5-15kW |
| EOCR-SS60W | 5-60UN | 380-440V e | 15877 | Dedicated 380V control power | 3-30kW |
2.2 EOCR-SSD Series (Digital Display Upgraded Version)
| Modello | Intervallo corrente | Controllare il potere | Ordine n. | Caratteristiche principali | Applicable Power (380V) |
| EOCRSSD-05S | 0.5-6UN | 24-240V CA/CC | 15878 | Dual digital & LED display, fault record, inverter optimized | 0.18-3kW |
| EOCRSSD-30S | 3-30UN | 24-240V CA/CC | 15879 | Same functions | 1.5-15kW |
| EOCRSSD-60S | 5-60UN | 24-240V CA/CC | 15880 | Same functions | 3-30kW |
| EOCRSSD-05W | 0.5-6UN | 380-440V e | 15881 | 380V dedicated, dual display | 0.18-3kW |
| EOCRSSD-30W | 3-30UN | 380-440V e | 15882 | 380V dedicated, dual display | 1.5-15kW |
| EOCRSSD-60W | 5-60UN | 380-440V e | 15883 | 380V dedicated, dual display | 3-30kW |
- Multifunctional Digital Protectors (EOCR-E Series)
3.1 EOCR-3DE/FDE Series (Basic Digital Type)
| Modello | Intervallo corrente | Controllare il potere | Tipo di cablaggio | Caratteristiche principali | Scenari applicabili |
| EOCR-3DE-05 | 0.5-6UN | 24-240V CA/CC | Window type | Overload/Phase Loss/Stall/Reverse Phase/Unbalance protection, pre-alarm | Motori industriali generali |
| EOCR-3DE-30 | 3-30UN | 24-240V CA/CC | Window type | Same functions | Motori industriali generali |
| EOCR-3DE-60 | 5-60UN | 24-240V CA/CC | Window type | Same functions | Motori industriali generali |
| EOCR-FDE-05 | 0.5-6UN | 24-240V CA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
| EOCR-FDE-30 | 3-30UN | 24-240V CA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
| EOCR-FDE-60 | 5-60UN | 24-240V CA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
3.2 EOCR-3EZ/FEZ Series (With Earth Fault Protection)
| Modello | Intervallo corrente | Controllare il potere | Tipo di cablaggio | Caratteristiche principali | Scenari applicabili |
| EOCR-3EZ-05 | 0.5-6UN | 24-240V CA/CC | Window type | 3DE full functions + adjustable earth fault protection (30mA-1A) | Equipment requiring earth protection |
| EOCR-3EZ-30 | 3-30UN | 24-240V CA/CC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-3EZ-80 | 5-80UN | 24-240V CA/CC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-FEZ-05 | 0.5-6UN | 24-240V CA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
| EOCR-FEZ-30 | 3-30UN | 24-240V CA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
| EOCR-FEZ-80 | 5-80UN | 24-240V CA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
3.3 EOCR-3E420/FE420 Series (With 4-20mA Output)
| Modello | Intervallo corrente | Controllare il potere | Tipo di cablaggio | Caratteristiche principali | Scenari applicabili |
| EOCR-3E420-05 | 0.5-6UN | 24-240V CA/CC | Window type | 3DE functions + 4-20mA analog output | Remote monitoring system |
| EOCR-3E420-30 | 3-30UN | 24-240V CA/CC | Window type | Same functions | Remote monitoring system |
| EOCR-3E420-60 | 5-60UN | 24-240V CA/CC | Window type | Same functions | Remote monitoring system |
| EOCR-FE420-05 | 0.5-6UN | 24-240V CA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoraggio remoto |
| EOCR-FE420-30 | 3-30UN | 24-240V CA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoraggio remoto |
| EOCR-FE420-60 | 5-60UN | 24-240V CA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoraggio remoto |
- Intelligent Protectors (EOCR-3DM2/FDM2/3MZ2 Series)
4.1 EOCR-3DM2 Series (Window Type)
| Modello | Intervallo corrente | Controllare il potere | Caratteristiche principali | Funzione di comunicazione | Scenari applicabili |
| EOCR-3DM2-WRDB | 0.5-80UN | 24A DC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-3DM2-WRDU | 0.5-80UN | 100-240V CA/CC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | AC & DC universal system |
| EOCR-3DM2-WRDBHZ | 0.5-80UN | 24A DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-3DM2-WRDUHZ | 0.5-80UN | 100-240V CA/CC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.2 EOCR-FDM2 Series (Feed-through Type)
| Modello | Intervallo corrente | Controllare il potere | Caratteristiche principali | Funzione di comunicazione | Scenari applicabili |
| EOCR-FDM2-FRDB | 0.5-80UN | 24A DC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-FDM2-FRDU | 0.5-80UN | 100-240V CA/CC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | AC & DC universal system |
| EOCR-FDM2-FRDBHZ | 0.5-80UN | 24A DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-FDM2-FRDUHZ | 0.5-80UN | 100-240V CA/CC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.3 EOCR-3MZ2 Series (Tipo di terminale, External CT Required)
| Modello | Intervallo corrente | Controllare il potere | Caratteristiche principali | Funzione di comunicazione | Scenari applicabili |
| EOCR-3MZ2-TRDB | 0.5-800UN (External CT) | 24A DC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDU | 0.5-800UN (External CT) | 100-240V CA/CC | Protezione completa + digital display + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDBHZ | 0.5-800UN (External CT) | 24A DC | With harmonic suppression function | RS-485 Modbus | High current frequency conversion motor |
| EOCR-3MZ2-TRDUHZ | 0.5-800UN (External CT) | 100-240V CA/CC | With harmonic suppression function | RS-485 Modbus | High current frequency conversion motor |
- Special Function Protectors
5.1 EOCR-DS/DS3 Series (Economical Digital Display Type)
| Modello | Intervallo corrente | Controllare il potere | Caratteristiche principali | Scenari applicabili |
| EOCRDS-05S | 0.5-6UN | 24-240V CA/CC | Overload/Phase Loss/Stall protection, digital display | Basic digital display demand |
| EOCRDS-30S | 3-30UN | 24-240V CA/CC | Overload/Phase Loss/Stall protection, digital display | Basic digital display demand |
| EOCRDS-60S | 5-60UN | 24-240V CA/CC | Overload/Phase Loss/Stall protection, digital display | Basic digital display demand |
| EOCRDS3-05S | 0.5-6UN | 24-240V CA/CC | Upgraded version with additional phase unbalance protection | Basic display + protezione dagli squilibri |
| EOCRDS3-30S | 3-30UN | 24-240V CA/CC | Upgraded version with additional phase unbalance protection | Basic display + protezione dagli squilibri |
| EOCRDS3-60S | 5-60UN | 24-240V CA/CC | Upgraded version with additional phase unbalance protection | Basic display + protezione dagli squilibri |
5.2 EOCR-PMZ/PFZ Series (Power Monitoring Type)
| Modello | Intervallo corrente | Controllare il potere | Caratteristiche principali | Funzione di comunicazione | Scenari applicabili |
| EOCR-PMZ-05 | 0.5-6UN | 24-240V CA/CC | Protezione completa + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-30 | 3-30UN | 24-240V CA/CC | Protezione completa + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-80 | 5-80UN | 24-240V CA/CC | Protezione completa + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PFZ-05 | 0.5-6UN | 24-240V CA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + limited space |
| EOCR-PFZ-30 | 3-30UN | 24-240V CA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + limited space |
| EOCR-PFZ-80 | 5-80UN | 24-240V CA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + limited space |
5.3 EOCR-DGT Series (Tipo di protezione dalle perdite)
| Modello | Intervallo corrente | Leakage Protection Range | Controllare il potere | Caratteristiche principali | Scenari applicabili |
| EOCR-DGT-05 | 0.5-6UN | 30mA-1A | 24-240V CA/CC | Perdita + Sovraccarico + Phase Loss + Reverse Phase + Unbalance protection | Equipment in humid environment |
| EOCR-DGT-30 | 3-30UN | 30mA-1A | 24-240V CA/CC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-60 | 5-60UN | 30mA-1A | 24-240V CA/CC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-80 | 5-80UN | 30mA-1A | 24-240V CA/CC | Full combined protection | Equipment in humid environment |
- Quick Memorization of Model Naming Rules
- Prefisso: EOCR= Schneider motor protection relay series mark
- Codice serie:
SS/SSD: Economical type (SSD with digital display)
3DE/FDE/3EZ/FEZ/3E420/FE420: Multifunctional digital type
3DM2/FDM2/3MZ2: Tipo intelligente (3MZ2 needs external CT)
DS/DS3: Simple digital display type
PMZ/PFZ: Power monitoring type
DGT: Leakage protection type
- Codice attuale: 05(0.5-6UN), 30(3-30UN), 60(5-60UN), 80(5-80UN)
- Power Supply Code: S(24-240V CA/CC), W(380V e), B(24VCC), U(100-240V CA/CC)
- Modalità di cablaggio: W(Window), F(Feed-through), T(Terminal type)
- Funzione speciale: HZ(Harmonic suppression), 420(4-20mA output)
- Quick Selection Table by Functional Demand
| Functional Demand | Serie consigliata | Vantaggi fondamentali | Max Current |
| Protezione di base & basso costo | EOCR-SS/SSD | Conveniente, facile installazione | 60UN |
| Protezione di base + digital display | EOCRSSD/DS | Visualized fault checking | 60UN |
| Protezione completa + earth fault protection | EOCR-3EZ/FEZ | Anti-leakage, high safety level | 80UN |
| Monitoraggio remoto + analog signal | EOCR-3E420/FE420 | 4-20mA signal output, easy system integration | 60UN |
| Intelligent control + comunicazione | EOCR-3DM2/FDM2 | Modbus remote control | 80UN |
| High current motor protection | EOCR-3MZ2 | Match external CT, cover 0.5-800A | 800UN |
| Energy consumption monitoring + protezione | EOCR-PMZ/PFZ | Power statistics and energy-saving analysis | 80UN |
| Protezione dalle perdite + full combined protection | EOCR-DGT | Protezione contro le perdite integrata | 80UN |
Contattore,interruttore automatico,inverter solare,contatore elettrico,batterie solari



















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