Interpretation des Modellcodes
| Codesegment | Beschreibung |
| 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, Version mit digitaler Anzeige, 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 |
Kernpositionierung:
EOCRSSD-30S is a compact digital comprehensive motor protection relay, featuring three core protections: Überlast, phase loss and stall. It is applicable for motors with current 3-30A and compatible with 24-240V wide-voltage control power supply.
- Kernspezifikationsparameter
| Kategorie | Detaillierte Spezifikationen | Bemerkungen |
| Grundparameter | ||
| Bestellnummer | EOCRSSD-30S (Schneider SKU: 0015874) | Standard universal model worldwide |
| Schutzart | Electronic overcurrent relay / Motor protector | Replace combination of traditional thermal relay and ammeter |
| Installation | 35mm DIN-Schienenmontage / Panel mounting | Kompakte Struktur, platzsparend |
| Dimension (B×H×T) | 56mm×78mm×120mm | Fully compatible with installation size of EOCR-SS series |
| Betriebstemperatur | -20℃ ~ 60℃ | Adapt to temperature difference changes in industrial environment |
| Elektrische Spezifikationen | ||
| Current Protection Range | 3-30A (direct wiring) | External CT is required for current over 60A |
| Steuerstromversorgung | 24-240V AC/DC (50/60Hz) | Wide voltage design, fit for various control systems |
| Working Frequency | 50/60Hz | Universal power frequency for global use |
| Output Contacts | 1NEIN + 1NC passive contacts | 95-96 (NC), 97-98 (NEIN) |
| Kontaktkapazität | Wechselstrom 250 V/5 A, DC 30V/5A | Meet demands of conventional control circuits |
| Schutzfunktionen | ||
| Überlastschutz | Einstellbar (0.1~100s), support I²t inverse time characteristic | Set via O-TIME parameter |
| Phasenausfallschutz | Quick action within 4 Sekunden | 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 |
| Anzeigefunktion | 7-segment LED digital tube | Real-time display of operating current and fault code |
| Reset-Modus | Manueller Reset (RESET button) / Electric reset | Easy recovery after troubleshooting |
| Genauigkeit & Zuverlässigkeit | ||
| Measuring Accuracy | ±1 % | Higher than traditional thermal relay (±10 %) |
| Ansprechzeit | Min. 0.2S (Stallschutz) | Effectively prevent motor damage |
| Fault Record | Check the latest 3 Störungsaufzeichnungen | Convenient for quick fault location |
| Isolationsklasse | Class II | High safety protection level |
- Häufige Fehler & Maintenance Solutions
3.1 Fault Codes & Fehlerbehebung
| Fehlercode | Fehlertyp | Mögliche Ursachen | Lösungen |
| 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 | Phasenverlust / 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 | ||
| Keine Anzeige | Stromausfall | 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. Lose Verkabelung | 2. Inspect and fasten all wiring | ||
| 3. Firmware error | 3. Restore device to factory settings |
3.2 Daily Maintenance Schedule
| Wartungszyklus | Maintenance Items | Operation Points |
| Täglich | Visuelle Inspektion | Clean panel and heat dissipation holes, check normal LED display |
| Wöchentlich | Wiring Inspection | Check loose terminals and oxidation phenomenon |
| Monatlich | Parameter Verification | Confirm O-TIME and D-TIME conform to motor rated values |
| Vierteljährlich | Funktionstest | 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.
| Modell | Current Protection Range | Steuerstromversorgung | Main Features | Anwendbare Motorleistung (380V) |
| EOCRSSD-05S | 0.5-6A | 24-240V AC/DC | Special for low current, direct wiring | 0.18-3kW |
| EOCRSSD-30S | 3-30A | 24-240V AC/DC | General medium current type, direct wiring | 1.5-15kW |
| EOCRSSD-60S | 5-60A | 24-240V AC/DC | General high current type, direct wiring (External CT required above 60A) | 3-30kW |
Notiz: 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 |
| Aktueller Bereich | 3-30A | 2.5-32A | 0.1-40A | 3-30A |
| Steuerstromversorgung | 24-240V AC/DC | 24-240V AC/DC | 24-240V AC/DC | 24-240V AC/DC |
| Schutzfunktionen | Überlast, Phasenverlust, Stall | Überlast, Phasenverlust, Stall | Überlast, Phasenverlust, Stall, Phase Unbalance | Überlast, Phasenverlust, Stall |
| Display Mode | 7-segment LED digital tube | LED indicator light | Digitale Anzeige | LED indicator light |
| Output Contacts | 1NO+1NC | 1NO+1NC | 1NO+1NC | 1NO+1NC |
| Genauigkeitsgrad | ±1 % | ±2 % | ±1 % | ±2 % |
| Installationsgröße | 56×78×120mm | 55×78×118mm | 56×78×120mm | 55×78×118mm |
| Preisklasse | Medium (Um 370 RMB) | Hoch (Um 500 RMB) | Hoch (Um 480 RMB) | Medium (Um 350 RMB) |
| Kernvorteile | Intuitive digital display, fault record, 1:1 replacement for SS series | Brand premium, excellent system integration | Phase unbalance protection, hohe präzision | Kostengünstig, schnelle Reaktionsgeschwindigkeit |
- Air Shipment Compliance & Zertifizierungsinformationen
6.1 Air Shipment Compliance Judgment
Produktkategorie: Electrical and electronic equipment (Keine eingebaute Lithiumbatterie / Superkondensator)
UN Number: Nicht erforderlich (Ungefährliche Güter)
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 Zertifizierungsinformationen
| Certification Type | Zertifizierungsstandard | Applicable Scope | Hauptanforderungen |
| CE-Zertifizierung | IN 60947-4-1 (Elektrische Sicherheit) | EU Market | Comply with Low Voltage Directive (LVD) and EMC Directive |
| IN 61000-6-2 (EMC Immunity) | |||
| UL-Zertifizierung | UL 508 (Industrielle Steuerungsausrüstung) | 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 | IEC 60947-4-1 | Global Market | Comply with standards of International Electrotechnical Commission |
Notiz: 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 Jahre.
- 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 wide voltage;
Three core protections: Überlast, phase loss and stall;
Easy fault checking via digital display, convenient DIN rail installation.
7.2 Quick Memorization Rules
Aktuelle Übereinstimmung: Rated motor current shall be within 30%-80% of protector range, avoid boundary value affecting accuracy
Voltage Selection: Prioritize Type S (24-240V AC/DC) control power for stronger compatibility
Parametereinstellung:
O-TIME: Satz 10-20 seconds when current is 1.2 times motor rated current
D-TIME: Set as motor startup time plus 2 Sekunden
Replacement Rule: Realize 1:1 direct replacement for traditional EOCR-SS series and thermal relays without changing installation size and wiring
- Applicable & Nicht anwendbare Szenarien
Anwendbare Szenarien
- 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
Nicht anwendbare Szenarien
- 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: Sparsamer Typ, 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)
| Modell | Aktueller Bereich | Kontrollmacht | Bestell-Nr. | Kernfunktionen | Applicable Power (380V) |
| EOCR-SS05S | 0.5-6A | 24-240V AC/DC | 15872 | Overload/Phase Loss/Stall protection, LED indication | 0.18-3kW |
| EOCR-SS30S | 3-30A | 24-240V AC/DC | 15873 | Same protection functions | 1.5-15kW |
| EOCR-SS60S | 5-60A | 24-240V AC/DC | 15874 | Same protection functions | 3-30kW |
| EOCR-SS05W | 0.5-6A | 380-440V und | 15875 | Dedicated 380V control power | 0.18-3kW |
| EOCR-SS30W | 3-30A | 380-440V und | 15876 | Dedicated 380V control power | 1.5-15kW |
| EOCR-SS60W | 5-60A | 380-440V und | 15877 | Dedicated 380V control power | 3-30kW |
2.2 EOCR-SSD Series (Digital Display Upgraded Version)
| Modell | Aktueller Bereich | Kontrollmacht | Bestell-Nr. | Kernfunktionen | Applicable Power (380V) |
| EOCRSSD-05S | 0.5-6A | 24-240V AC/DC | 15878 | Dual digital & LED display, fault record, inverter optimized | 0.18-3kW |
| EOCRSSD-30S | 3-30A | 24-240V AC/DC | 15879 | Same functions | 1.5-15kW |
| EOCRSSD-60S | 5-60A | 24-240V AC/DC | 15880 | Same functions | 3-30kW |
| EOCRSSD-05W | 0.5-6A | 380-440V und | 15881 | 380V dedicated, dual display | 0.18-3kW |
| EOCRSSD-30W | 3-30A | 380-440V und | 15882 | 380V dedicated, dual display | 1.5-15kW |
| EOCRSSD-60W | 5-60A | 380-440V und | 15883 | 380V dedicated, dual display | 3-30kW |
- Multifunctional Digital Protectors (EOCR-E Series)
3.1 EOCR-3DE/FDE Series (Basic Digital Type)
| Modell | Aktueller Bereich | Kontrollmacht | Verkabelungstyp | Kernfunktionen | Anwendbare Szenarien |
| EOCR-3DE-05 | 0.5-6A | 24-240V AC/DC | Window type | Overload/Phase Loss/Stall/Reverse Phase/Unbalance protection, pre-alarm | Allgemeine Industriemotoren |
| EOCR-3DE-30 | 3-30A | 24-240V AC/DC | Window type | Same functions | Allgemeine Industriemotoren |
| EOCR-3DE-60 | 5-60A | 24-240V AC/DC | Window type | Same functions | Allgemeine Industriemotoren |
| EOCR-FDE-05 | 0.5-6A | 24-240V AC/DC | Feed-through type | Same as 3DE series with different wiring | Platzbegrenzte Installation |
| EOCR-FDE-30 | 3-30A | 24-240V AC/DC | Feed-through type | Same as 3DE series with different wiring | Platzbegrenzte Installation |
| EOCR-FDE-60 | 5-60A | 24-240V AC/DC | Feed-through type | Same as 3DE series with different wiring | Platzbegrenzte Installation |
3.2 EOCR-3EZ/FEZ Series (With Earth Fault Protection)
| Modell | Aktueller Bereich | Kontrollmacht | Verkabelungstyp | Kernfunktionen | Anwendbare Szenarien |
| EOCR-3EZ-05 | 0.5-6A | 24-240V AC/DC | Window type | 3DE full functions + adjustable earth fault protection (30mA-1A) | Equipment requiring earth protection |
| EOCR-3EZ-30 | 3-30A | 24-240V AC/DC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-3EZ-80 | 5-80A | 24-240V AC/DC | Window type | Same functions | Equipment requiring earth protection |
| EOCR-FEZ-05 | 0.5-6A | 24-240V AC/DC | Feed-through type | Same as 3EZ series | Platzbegrenzte Installation + earth protection |
| EOCR-FEZ-30 | 3-30A | 24-240V AC/DC | Feed-through type | Same as 3EZ series | Platzbegrenzte Installation + earth protection |
| EOCR-FEZ-80 | 5-80A | 24-240V AC/DC | Feed-through type | Same as 3EZ series | Platzbegrenzte Installation + earth protection |
3.3 EOCR-3E420/FE420 Series (With 4-20mA Output)
| Modell | Aktueller Bereich | Kontrollmacht | Verkabelungstyp | Kernfunktionen | Anwendbare Szenarien |
| EOCR-3E420-05 | 0.5-6A | 24-240V AC/DC | Window type | 3DE functions + 4-20mA analog output | Remote monitoring system |
| EOCR-3E420-30 | 3-30A | 24-240V AC/DC | Window type | Same functions | Remote monitoring system |
| EOCR-3E420-60 | 5-60A | 24-240V AC/DC | Window type | Same functions | Remote monitoring system |
| EOCR-FE420-05 | 0.5-6A | 24-240V AC/DC | Feed-through type | Same as 3E420 series | Space-limited + Fernüberwachung |
| EOCR-FE420-30 | 3-30A | 24-240V AC/DC | Feed-through type | Same as 3E420 series | Space-limited + Fernüberwachung |
| EOCR-FE420-60 | 5-60A | 24-240V AC/DC | Feed-through type | Same as 3E420 series | Space-limited + Fernüberwachung |
- Intelligent Protectors (EOCR-3DM2/FDM2/3MZ2 Series)
4.1 EOCR-3DM2 Series (Window Type)
| Modell | Aktueller Bereich | Kontrollmacht | Kernfunktionen | Kommunikationsfunktion | Anwendbare Szenarien |
| EOCR-3DM2-WRDB | 0.5-80A | 24In DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-3DM2-WRDU | 0.5-80A | 100-240V AC/DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | Wechselstrom & DC universal system |
| EOCR-3DM2-WRDBHZ | 0.5-80A | 24In DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-3DM2-WRDUHZ | 0.5-80A | 100-240V AC/DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.2 EOCR-FDM2 Series (Feed-through Type)
| Modell | Aktueller Bereich | Kontrollmacht | Kernfunktionen | Kommunikationsfunktion | Anwendbare Szenarien |
| EOCR-FDM2-FRDB | 0.5-80A | 24In DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | DC control system |
| EOCR-FDM2-FRDU | 0.5-80A | 100-240V AC/DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | Wechselstrom & DC universal system |
| EOCR-FDM2-FRDBHZ | 0.5-80A | 24In DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
| EOCR-FDM2-FRDUHZ | 0.5-80A | 100-240V AC/DC | With harmonic suppression function | RS-485 Modbus | Frequency conversion drive system |
4.3 EOCR-3MZ2 Series (Terminaltyp, External CT Required)
| Modell | Aktueller Bereich | Kontrollmacht | Kernfunktionen | Kommunikationsfunktion | Anwendbare Szenarien |
| EOCR-3MZ2-TRDB | 0.5-800A (External CT) | 24In DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDU | 0.5-800A (External CT) | 100-240V AC/DC | Voller Schutz + Digitalanzeige + fault record + load selection | RS-485 Modbus | High current motor |
| EOCR-3MZ2-TRDBHZ | 0.5-800A (External CT) | 24In DC | With harmonic suppression function | RS-485 Modbus | High current frequency conversion motor |
| EOCR-3MZ2-TRDUHZ | 0.5-800A (External CT) | 100-240V AC/DC | 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)
| Modell | Aktueller Bereich | Kontrollmacht | Kernfunktionen | Anwendbare Szenarien |
| EOCRDS-05S | 0.5-6A | 24-240V AC/DC | Overload/Phase Loss/Stall protection, Digitalanzeige | Basic digital display demand |
| EOCRDS-30S | 3-30A | 24-240V AC/DC | Overload/Phase Loss/Stall protection, Digitalanzeige | Basic digital display demand |
| EOCRDS-60S | 5-60A | 24-240V AC/DC | Overload/Phase Loss/Stall protection, Digitalanzeige | Basic digital display demand |
| EOCRDS3-05S | 0.5-6A | 24-240V AC/DC | Upgraded version with additional phase unbalance protection | Basic display + unbalance protection |
| EOCRDS3-30S | 3-30A | 24-240V AC/DC | Upgraded version with additional phase unbalance protection | Basic display + unbalance protection |
| EOCRDS3-60S | 5-60A | 24-240V AC/DC | Upgraded version with additional phase unbalance protection | Basic display + unbalance protection |
5.2 EOCR-PMZ/PFZ Series (Power Monitoring Type)
| Modell | Aktueller Bereich | Kontrollmacht | Kernfunktionen | Kommunikationsfunktion | Anwendbare Szenarien |
| EOCR-PMZ-05 | 0.5-6A | 24-240V AC/DC | Voller Schutz + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-30 | 3-30A | 24-240V AC/DC | Voller Schutz + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PMZ-80 | 5-80A | 24-240V AC/DC | Voller Schutz + power monitoring + energy metering | RS-485 Modbus | Energy consumption monitoring system |
| EOCR-PFZ-05 | 0.5-6A | 24-240V AC/DC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energieüberwachung + limited space |
| EOCR-PFZ-30 | 3-30A | 24-240V AC/DC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energieüberwachung + limited space |
| EOCR-PFZ-80 | 5-80A | 24-240V AC/DC | Feed-through type, same functions as PMZ series | RS-485 Modbus | Energieüberwachung + limited space |
5.3 EOCR-DGT Series (Auslaufschutztyp)
| Modell | Aktueller Bereich | Leakage Protection Range | Kontrollmacht | Kernfunktionen | Anwendbare Szenarien |
| EOCR-DGT-05 | 0.5-6A | 30mA-1A | 24-240V AC/DC | Leckage + Überlast + Phasenverlust + Reverse Phase + Unbalance protection | Equipment in humid environment |
| EOCR-DGT-30 | 3-30A | 30mA-1A | 24-240V AC/DC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-60 | 5-60A | 30mA-1A | 24-240V AC/DC | Full combined protection | Equipment in humid environment |
| EOCR-DGT-80 | 5-80A | 30mA-1A | 24-240V AC/DC | Full combined protection | Equipment in humid environment |
- Quick Memorization of Model Naming Rules
- Präfix: EOCR= Schneider motor protection relay series mark
- Seriencode:
SS/SSD: Economical type (SSD with digital display)
3DE/FDE/3EZ/FEZ/3E420/FE420: Multifunctional digital type
3DM2/FDM2/3MZ2: Intelligenter Typ (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(24-240V AC/DC), W(380V und), B(24VDC), U(100-240V AC/DC)
- Verkabelungsmodus: W(Window), F(Feed-through), T(Terminaltyp)
- Sonderfunktion: HZ(Harmonic suppression), 420(4-20mA-Ausgang)
- Quick Selection Table by Functional Demand
| Functional Demand | Empfohlene Serie | Kernvorteile | Max Current |
| Grundschutz & niedrige Kosten | EOCR-SS/SSD | Kostengünstig, einfache Installation | 60A |
| Grundschutz + Digitalanzeige | EOCRSSD/DS | Visualized fault checking | 60A |
| Voller Schutz + earth fault protection | EOCR-3EZ/FEZ | Anti-leakage, high safety level | 80A |
| Fernüberwachung + analog signal | EOCR-3E420/FE420 | 4-20mA signal output, easy system integration | 60A |
| Intelligent control + Kommunikation | EOCR-3DM2/FDM2 | Modbus remote control | 80A |
| High current motor protection | EOCR-3MZ2 | Match external CT, cover 0.5-800A | 800A |
| Energy consumption monitoring + Schutz | EOCR-PMZ/PFZ | Power statistics and energy-saving analysis | 80A |
| Auslaufschutz + full combined protection | EOCR-DGT | Integrated leakage protection | 80A |
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