Interpretación del código modelo
| Segmento de código | Descripción |
| 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, Versión con pantalla digital, different from LED indicator type of traditional SS series |
| 30 | Current specification code, rated protection current range: 3-30A, 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 |
Posicionamiento central:
EOCRSSD-30S is a compact digital comprehensive motor protection relay, featuring three core protections: sobrecarga, phase loss and stall. It is applicable for motors with current 3-30A and compatible with 24-240V wide-voltage control power supply.
- Parámetros de especificación principales
| Categoría | Especificaciones detalladas | Observaciones |
| Parámetros básicos | ||
| Número de orden | EOCRSSD-30S (Schneider SKU: 0015874) | Standard universal model worldwide |
| Tipo de protección | Electronic overcurrent relay / Motor protector | Replace combination of traditional thermal relay and ammeter |
| Instalación | 35mm montaje en carril DIN / Panel mounting | Estructura compacta, ahorro de espacio |
| Dimensión (Ancho×Alto×Profundidad) | 56mm×78mm×120mm | Fully compatible with installation size of EOCR-SS series |
| Temperatura de funcionamiento | -20℃ ~ 60 ℃ | Adapt to temperature difference changes in industrial environment |
| Especificaciones eléctricas | ||
| Current Protection Range | 3-30A (direct wiring) | External CT is required for current over 60A |
| Controlar la fuente de alimentación | 24-240VCA/CC (50/60Hz) | Diseño de amplio voltaje, fit for various control systems |
| Working Frequency | 50/60Hz | Universal power frequency for global use |
| Contactos de salida | 1NO + 1NC passive contacts | 95-96 (CAROLINA DEL NORTE), 97-98 (NO) |
| Capacidad de contacto | AC 250V/5A, DC 30V/5A | Meet demands of conventional control circuits |
| Funciones de protección | ||
| Protección contra sobrecarga | Ajustable (0.1~100s), support I²t inverse time characteristic | Set via O-TIME parameter |
| Protección de pérdida de fase | Quick action within 4 artículos de segunda clase | 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 |
| Display Function | 7-segment LED digital tube | Real-time display of operating current and fault code |
| Modo de reinicio | Reinicio manual (Botón REINICIAR) / Electric reset | Easy recovery after troubleshooting |
| Exactitud & Fiabilidad | ||
| Measuring Accuracy | ±1% | Higher than traditional thermal relay (±10%) |
| Tiempo de respuesta | mín.. 0.2s (protección de puesto) | Effectively prevent motor damage |
| Fault Record | Check the latest 3 registros de fallas | Convenient for quick fault location |
| Clase de aislamiento | Class II | High safety protection level |
- Fallos comunes & Soluciones de mantenimiento
3.1 Fault Codes & Solución de problemas
| Código de falla | Tipo de falla | Posibles causas | Soluciones |
| 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 | ||
| Sin visualización | 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 | Interferencia electromagnética | 1. Close to high-power inverter / electric welder | 1. Keep away from interference sources or add shielding measures |
| 2. Cableado suelto | 2. Inspect and fasten all wiring | ||
| 3. Firmware error | 3. Restore device to factory settings |
3.2 Daily Maintenance Schedule
| Ciclo de mantenimiento | Maintenance Items | Operation Points |
| A diario | Inspección visual | Clean panel and heat dissipation holes, check normal LED display |
| Semanalmente | Inspección de cableado | Check loose terminals and oxidation phenomenon |
| Mensual | Parameter Verification | Confirm O-TIME and D-TIME conform to motor rated values |
| Trimestral | Prueba de funcionamiento | 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.
| Modelo | Current Protection Range | Controlar la fuente de alimentación | Características principales | Potencia del motor aplicable (380V) |
| EOCRSSD-05S | 0.5-6A | 24-240VCA/CC | Special for low current, direct wiring | 0.18-3kilovatios |
| EOCRSSD-30S | 3-30A | 24-240VCA/CC | General medium current type, direct wiring | 1.5-15kilovatios |
| EOCRSSD-60S | 5-60A | 24-240VCA/CC | General high current type, direct wiring (External CT required above 60A) | 3-30kilovatios |
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 |
| Rango actual | 3-30A | 2.5-32A | 0.1-40A | 3-30A |
| Controlar la fuente de alimentación | 24-240VCA/CC | 24-240VCA/CC | 24-240VCA/CC | 24-240VCA/CC |
| Funciones de protección | Sobrecarga, Phase Loss, Stall | Sobrecarga, Phase Loss, Stall | Sobrecarga, Phase Loss, Stall, Phase Unbalance | Sobrecarga, Phase Loss, Stall |
| Modo de visualización | 7-segment LED digital tube | LED indicator light | Digital display | LED indicator light |
| Contactos de salida | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC |
| Grado de precisión | ±1% | ±2% | ±1% | ±2% |
| Tamaño de instalación | 56×78×120mm | 55×78×118mm | 56×78×120mm | 55×78×118mm |
| Gama de precios | Medio (Acerca de 370 RMB) | Alto (Acerca de 500 RMB) | Alto (Acerca de 480 RMB) | Medio (Acerca de 350 RMB) |
| Ventajas principales | Intuitive digital display, fault record, 1:1 replacement for SS series | Brand premium, excellent system integration | Phase unbalance protection, alta precisión | Rentable, velocidad de respuesta rápida |
- Air Shipment Compliance & Información de certificación
6.1 Air Shipment Compliance Judgment
Categoría de producto: Electrical and electronic equipment (No built-in lithium battery / super capacitor)
UN Number: No requerido (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 Información de certificación
| Certification Type | Estándar de certificación | Alcance aplicable | Key Requirements |
| Certificación CE | EN 60947-4-1 (Electrical Safety) | EU Market | Comply with Low Voltage Directive (LVD) and EMC Directive |
| EN 61000-6-2 (EMC Immunity) | |||
| Certificación UL | UL 508 (Equipos de control industrial) | 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 años.
- Selection Formula & Quick Memorization Rules
7.1 Selection Formula
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 amplio voltaje;
Three core protections: sobrecarga, phase loss and stall;
Easy fault checking via digital display, convenient DIN rail installation.
7.2 Quick Memorization Rules
Coincidencia actual: Rated motor current shall be within 30%-80% of protector range, avoid boundary value affecting accuracy
Voltage Selection: Prioritize Type S (24-240VCA/CC) control power for stronger compatibility
Configuración de parámetros:
O-TIME: Set 10-20 seconds when current is 1.2 times motor rated current
D-TIME: Set as motor startup time plus 2 artículos de segunda clase
Replacement Rule: Realize 1:1 direct replacement for traditional EOCR-SS series and thermal relays without changing installation size and wiring
- Aplicable & Escenarios inaplicables
Escenarios aplicables
- General Industrial Motors: Protection for water pumps, fans, compressors and other common equipment
- Small Production Lines: 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
Escenarios inaplicables
- 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
- Descripción general de la clasificación de series
Schneider EOCR digital motor protectors are divided into three categories by function positioning: Tipo económico, 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 (Indicación LED)
| Modelo | Rango actual | Controlar el poder | Número de pedido. | Características principales | Applicable Power (380V) |
| EOCR-SS05S | 0.5-6A | 24-240VCA/CC | 15872 | Overload/Phase Loss/Stall protection, indicación LED | 0.18-3kilovatios |
| EOCR-SS30S | 3-30A | 24-240VCA/CC | 15873 | Same protection functions | 1.5-15kilovatios |
| EOCR-SS60S | 5-60A | 24-240VCA/CC | 15874 | Same protection functions | 3-30kilovatios |
| EOCR-SS05W | 0.5-6A | 380-440V y | 15875 | Dedicated 380V control power | 0.18-3kilovatios |
| EOCR-SS30W | 3-30A | 380-440V y | 15876 | Dedicated 380V control power | 1.5-15kilovatios |
| EOCR-SS60W | 5-60A | 380-440V y | 15877 | Dedicated 380V control power | 3-30kilovatios |
2.2 EOCR-SSD Series (Digital Display Upgraded Version)
| Modelo | Rango actual | Controlar el poder | Número de pedido. | Características principales | Applicable Power (380V) |
| EOCRSSD-05S | 0.5-6A | 24-240VCA/CC | 15878 | Dual digital & LED display, fault record, inverter optimized | 0.18-3kilovatios |
| EOCRSSD-30S | 3-30A | 24-240VCA/CC | 15879 | Same functions | 1.5-15kilovatios |
| EOCRSSD-60S | 5-60A | 24-240VCA/CC | 15880 | Same functions | 3-30kilovatios |
| EOCRSSD-05W. | 0.5-6A | 380-440V y | 15881 | 380V dedicated, dual display | 0.18-3kilovatios |
| EOCRSSD-30W | 3-30A | 380-440V y | 15882 | 380V dedicated, dual display | 1.5-15kilovatios |
| EOCRSSD-60W | 5-60A | 380-440V y | 15883 | 380V dedicated, dual display | 3-30kilovatios |
- Multifunctional Digital Protectors (EOCR-E Series)
3.1 EOCR-3DE/FDE Series (Basic Digital Type)
| Modelo | Rango actual | Controlar el poder | Wiring Type | Características principales | Escenarios aplicables |
| EOCR-3DE-05 | 0.5-6A | 24-240VCA/CC | Window type | Overload/Phase Loss/Stall/Reverse Phase/Unbalance protection, pre-alarm | General industrial motors |
| EOCR-3DE-30 | 3-30A | 24-240VCA/CC | Window type | Same functions | General industrial motors |
| EOCR-3DE-60 | 5-60A | 24-240VCA/CC | Window type | Same functions | General industrial motors |
| EOCR-FDE-05 | 0.5-6A | 24-240VCA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
| EOCR-FDE-30 | 3-30A | 24-240VCA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
| EOCR-FDE-60 | 5-60A | 24-240VCA/CC | Feed-through type | Same as 3DE series with different wiring | Space-limited installation |
3.2 EOCR-3EZ/FEZ Series (With Earth Fault Protection)
| Modelo | Rango actual | Controlar el poder | Wiring Type | Características principales | Escenarios aplicables |
| EOCR-3EZ-05 | 0.5-6A | 24-240VCA/CC | Window type | 3DE full functions + adjustable earth fault protection (30mA-1A) | Equipment requiring earth protection |
| EOCR-3EZ-30 | 3-30A | 24-240VCA/CC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-3EZ-80 | 5-80A | 24-240VCA/CC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-FEZ-05 | 0.5-6A | 24-240VCA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
| EOCR-FEZ-30 | 3-30A | 24-240VCA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
| EOCR-FEZ-80 | 5-80A | 24-240VCA/CC | Feed-through type | Same as 3EZ series | Space-limited installation + earth protection |
3.3 EOCR-3E420/FE420 Series (With 4-20mA Output)
| Modelo | Rango actual | Controlar el poder | Wiring Type | Características principales | Escenarios aplicables |
| EOCR-3E420-05 | 0.5-6A | 24-240VCA/CC | Window type | 3DE functions + 4-20mA analog output | Remote monitoring system |
| EOCR-3E420-30 | 3-30A | 24-240VCA/CC | Window type | Same functions | Remote monitoring system |
| EOCR-3E420-60 | 5-60A | 24-240VCA/CC | Window type | Same functions | Remote monitoring system |
| EOCR-FE420-05 | 0.5-6A | 24-240VCA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoreo remoto |
| EOCR-FE420-30 | 3-30A | 24-240VCA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoreo remoto |
| EOCR-FE420-60 | 5-60A | 24-240VCA/CC | Feed-through type | Same as 3E420 series | Space-limited + monitoreo remoto |
- Intelligent Protectors (EOCR-3DM2/FDM2/3MZ2 Series)
4.1 EOCR-3DM2 Series (Window Type)
| Modelo | Rango actual | Controlar el poder | Características principales | Función de comunicación | Escenarios aplicables |
| EOCR-3DM2-WRDB | 0.5-80A | 24En DC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-3DM2-WRDU | 0.5-80A | 100-240VCA/CC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | C.A. & DC universal system |
| EOCR-3DM2-WRDBHZ | 0.5-80A | 24En DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-3DM2-WRDUHZ | 0.5-80A | 100-240VCA/CC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.2 EOCR-FDM2 Series (Feed-through Type)
| Modelo | Rango actual | Controlar el poder | Características principales | Función de comunicación | Escenarios aplicables |
| EOCR-FDM2-FRDB | 0.5-80A | 24En DC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-FDM2-FRDU | 0.5-80A | 100-240VCA/CC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | C.A. & DC universal system |
| EOCR-FDM2-FRDBHZ | 0.5-80A | 24En DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-FDM2-FRDUHZ | 0.5-80A | 100-240VCA/CC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.3 EOCR-3MZ2 Series (Tipo de terminal, External CT Required)
| Modelo | Rango actual | Controlar el poder | Características principales | Función de comunicación | Escenarios aplicables |
| EOCR-3MZ2-TRDB | 0.5-800A (External CT) | 24En DC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDU | 0.5-800A (External CT) | 100-240VCA/CC | Protección total + pantalla digital + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDBHZ | 0.5-800A (External CT) | 24En DC | With harmonic suppression function | RS-485 Modbus | High current frequency conversion motor |
| EOCR-3MZ2-TRDUHZ | 0.5-800A (External CT) | 100-240VCA/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)
| Modelo | Rango actual | Controlar el poder | Características principales | Escenarios aplicables |
| EOCRDS-05S | 0.5-6A | 24-240VCA/CC | Overload/Phase Loss/Stall protection, pantalla digital | Basic digital display demand |
| EOCRDS-30S | 3-30A | 24-240VCA/CC | Overload/Phase Loss/Stall protection, pantalla digital | Basic digital display demand |
| EOCRDS-60S | 5-60A | 24-240VCA/CC | Overload/Phase Loss/Stall protection, pantalla digital | Basic digital display demand |
| EOCRDS3-05S | 0.5-6A | 24-240VCA/CC | Upgraded version with additional phase unbalance protection | Basic display + protección de desequilibrio |
| EOCRDS3-30S | 3-30A | 24-240VCA/CC | Upgraded version with additional phase unbalance protection | Basic display + protección de desequilibrio |
| EOCRDS3-60S | 5-60A | 24-240VCA/CC | Upgraded version with additional phase unbalance protection | Basic display + protección de desequilibrio |
5.2 EOCR-PMZ/PFZ Series (Power Monitoring Type)
| Modelo | Rango actual | Controlar el poder | Características principales | Función de comunicación | Escenarios aplicables |
| EOCR-PMZ-05 | 0.5-6A | 24-240VCA/CC | Protección total + power monitoring + medición de energía | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-30 | 3-30A | 24-240VCA/CC | Protección total + power monitoring + medición de energía | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-80 | 5-80A | 24-240VCA/CC | Protección total + power monitoring + medición de energía | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PFZ-05 | 0.5-6A | 24-240VCA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + espacio limitado |
| EOCR-PFZ-30 | 3-30A | 24-240VCA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + espacio limitado |
| EOCR-PFZ-80 | 5-80A | 24-240VCA/CC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energy monitoring + espacio limitado |
5.3 EOCR-DGT Series (Leakage Protection Type)
| Modelo | Rango actual | Leakage Protection Range | Controlar el poder | Características principales | Escenarios aplicables |
| EOCR-DGT-05 | 0.5-6A | 30mA-1A | 24-240VCA/CC | Leakage + Sobrecarga + Phase Loss + Reverse Phase + Unbalance protection | Equipment in humid environment |
| EOCR-DGT-30 | 3-30A | 30mA-1A | 24-240VCA/CC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-60 | 5-60A | 30mA-1A | 24-240VCA/CC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-80 | 5-80A | 30mA-1A | 24-240VCA/CC | Full combined protection | Equipment in humid environment |
- Quick Memorization of Model Naming Rules
- Prefijo: EOCR= Schneider motor protection relay series mark
- Código de serie:
SS/SSD: Economical type (SSD with digital display)
3DE/FDE/3EZ/FEZ/3E420/FE420: Multifunctional digital type
3DM2/FDM2/3MZ2: Intelligent type (3MZ2 needs external CT)
DS/DS3: Simple digital display type
PMZ/PFZ: Power monitoring type
DGT: Leakage protection type
- Current Code: 05(0.5-6A), 30(3-30A), 60(5-60A), 80(5-80A)
- Power Supply Code: S(24-240VCA/CC), W.(380V y), B(24VCC), Ud.(100-240VCA/CC)
- Modo de cableado: W.(Window), F(Feed-through), t(Terminal type)
- Función especial: HZ(Harmonic suppression), 420(4-20mA output)
- Quick Selection Table by Functional Demand
| Functional Demand | Serie recomendada | Ventajas principales | Max Current |
| Protección básica & bajo costo | EOCR-SS/SSD | Rentable, fácil instalación | 60A |
| Protección básica + pantalla digital | EOCRSSD/DS | Visualized fault checking | 60A |
| Protección total + earth fault protection | EOCR-3EZ/FEZ | Anti-leakage, high safety level | 80A |
| Monitoreo remoto + analog signal | EOCR-3E420/FE420 | 4-20mA signal output, easy system integration | 60A |
| control inteligente + comunicación | EOCR-3DM2/FDM2 | Modbus remote control | 80A |
| High current motor protection | EOCR-3MZ2 | Match external CT, cover 0.5-800A | 800A |
| Energy consumption monitoring + protección | EOCR-PMZ/PFZ | Power statistics and energy-saving analysis | 80A |
| Protección contra fugas + full combined protection | EOCR-DGT | Integrated leakage protection | 80A |
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