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EOCR-SSD-C-30DMQ is a new-generation ultra-thin compact motor protector of SSD-C series launched by Schneider Electric (formerly Samwha Korea). It supports direct wiring within 3~30A, adopts AC220V control power supply, features digital display and Q-type three-phase peak current display. It is newly added with phase unbalance and phase sequence protection functions. With smaller size and higher precision, it is fully compatible to replace traditional SSD models. It is specially designed for compact cabinet layout under three-phase unbalanced operating conditions.
- Codul modelului Explicația
| Segment de cod | Definiţie |
| EOCR | Electronic Over Current Relay, core category for motor protection |
| SSD-C | Solid State Digital Compact, upgraded compact solid-state digital type; ultra-thin DIN rail mounted, successor of standard SSD series |
| 30 | Current protection range: 3~30A, direct circuit wiring without external CT current transformer |
| D | Digital tube display, real-time visible current value and fault codes |
| M | Control power specification: AC220V±15%, 50/60Hz (industry standard M7 specification) |
| Q | Peak current display function: only displays the maximum current among three phases instead of average value, perfectly suitable for unbalanced loads |
- Parametrii tehnici de bază
| Categoria parametrilor | Specificații | Observații |
| Marca | Schneider Electric (Original factory in Iksan, Korea, Samwha technology) | Authorized domestic distributor: Shanghai Hanshi Electric |
| Tip de produs | Compact solid-state digital protector for motor overload, phase loss and phase unbalance protection | Protection accuracy ±3%, better than ±5% of old SSD models |
| Rated Circuit Voltage | 690V și (IEC) / 600V și (UL) | Universal for low-voltage three-phase motors |
| Impulse Withstand Voltage | 6kV, conform cu IEC 60947-4-1 | Industrial surge resistance standard |
| Control Power Supply | AC220V±15% | Exclusive specification for suffix M |
| Total Power Consumption | ≤2.5W | Ultra-low power consumption, stable for long-term standby |
| Adjustable Current | 3~30A stepless continuous adjustment | Adjustment ratio: 10:1 |
| Full Protection Functions | Supraîncărcare, pierdere de fază, locked rotor, dezechilibru trifazat, abnormal phase sequence | Unbalance & phase sequence protection newly added in C series, unavailable on traditional SSD |
| Time Delay Parameters | Start delay D-Time: 0.2~30s; Trip delay O-Time: 0.2~10s | Wide adjustable range for heavy-duty starting motors |
| Output Contacts | 1NU+1NC (2SPST) | Evaluarea contactului: 3A/250VAC |
| Display Feature | Q version: flashing three-phase maximum current + fault code alarm | Quickly locate hidden single-phase overload risks |
| Dimensiunea de ansamblu | 40×72×105mm | Narrower than old SSD, economisire 30% cabinet space |
| Metoda de instalare | Standard 35mm DIN rail clip-on mounting | Direct wiring replacement for old SSD products |
| Clasa de protectie | IP20 (front panel) | Indoor installation inside control cabinets |
| Temperatura de operare | -20℃ ~ +60℃ | Adaptable to wide-range industrial temperature |
| Temperatura de depozitare | -40℃ ~ +85℃ | Safe for transportation and storage |
- Core Differences Between New SSD-C and Traditional Standard SSD
| Element de comparație | EOCR-SSD-C-30DMQ (New C Type) | EOCR-SSD-30DM7Q (Old Standard Type) |
| Outline Size | Ultra-thin compact design, space-saving in cabinet | Conventional wide body, larger space occupation |
| Funcții de protecție | Supraîncărcare + Phase Loss + Locked Rotor + Phase Unbalance + Secvența fazelor | Only overload, phase loss and locked rotor protection |
| Protection Accuracy | ±3% | ±5% |
| Adjustable Time Delay Range | Wider range: 0.2~30s | Narrow range: 0.5~10s |
| Electromagnetic Interference Resistance | Enhanced EMC filter, applicable for inverter surrounding environments | Ordinary anti-interference performance, easily affected by inverter interference |
| Compatibilitate | Universal pin definition, seamless replacement for old models | Cannot be reversely replaced by new C-type products |
- Cross-Brand Product Comparison
| Marca & Model | Interval de curent | Puterea de control | Display Mode | Core Protection | Scenarii de aplicare |
| Schneider EOCR-SSD-C-30DMQ | 3~30A | 220VAC | Three-phase peak current Q display | Supraîncărcare / Phase Loss / Locked Rotor / Unbalance / Secvența fazelor | Narrow cabinets, heavy-duty motors with three-phase unbalance |
| Schneider EOCR-SSD-30DM7Q | 3~30A | 220VAC | Three-phase average current display | Supraîncărcare / Phase Loss / Locked Rotor | Conventional working conditions with balanced loads |
| ABB CM-MSS.31P | 3~30A | 24~240V AC/DC | Indicator light without digital display | Supraîncărcare & Phase Loss | Simple basic protection for general industrial control |
| Siemens 3RB2026-1SB0 | 2.5~32A | Wide universal voltage | Indicator light | Basic overload and phase loss protection | Complete cabinet matching with Siemens PLC |
| Omron K8DS-PH1 | 3~30A | 100~240VAC | Average value digital display | Full-range protection | Precision motors for automatic production lines |
- Full SSD-C Series Model List (Including Q Peak Current Version)
| Current Grade | Basic Model | Optional Power Suffix | Complete Q Peak Current Model |
| 0.5~6A | EOCR-SSD-C-05S | F7:110VAC / M:220VAC / S:24~240V / W:380V | EOCR-SSD-C-05DMQ |
| 3~30A | EOCR-SSD-C-30S | La fel ca mai sus | EOCR-SSD-C-30DMQ |
| 5~60A | EOCR-SSD-C-60S | La fel ca mai sus | EOCR-SSD-C-60DMQ |
Order Accessories
DIN rail bracket: EOCR-MNT-01
Test & calibration kit: EOCR-TEST-KIT
Custom signal extension cable: 5m / 10m
- Defecte comune & Exclusive Maintenance Solutions (C-Q Series)
| Fenomen de eroare | Main Causes | Depanare & Soluții |
| No display on panel | Disconnected 220V power supply, loose terminals, blown internal fuse | Measure terminal voltage, fasten wiring, replace 0.5A fuse |
| Frequent unbalance alarm & tripping | Three-phase load deviation over 8%, poor line contact, phase loss of power supply | Balance motor load, tighten three-phase wiring, inspect incoming line voltage |
| False tripping & failure to start | Too short D-Time start delay, underset current value | Set delay = motor starting time +1~2s; set current to 1.1 times motor rated current |
| Phase sequence fault alarm | Reversed phase sequence of three-phase incoming lines | Swap any two live wire connections |
| Garbled flickering display | Strong electromagnetic interference from inverter, poor grounding | Standardize grounding layout, keep away from inverter cables, install anti-interference filter |
Ciclul de întreținere
Daily inspection: Check peak current value and fault alarm status
Monthly maintenance: Remove dust and tighten wiring terminals
Quarterly calibration: Verify protection action threshold
Annual overhaul: Detect contact service life and replace aging components
- Application Environment Specifications
✅ Recommended Application Scenarios
- Water pumps, fani, conveyors working under three-phase current unbalance conditions
- Compact control cabinets requiring ultra-thin compact protectors
- Heavy-duty motors for chemical stirring, metalurgie, water treatment and HVAC systems
- Industrial sites with strong electromagnetic interference nearby inverters
❌ Not Recommended Scenarios
- High-voltage motors above 690V (special high-voltage protector required)
- Explosion-proof hazardous areas (no original factory explosion-proof enclosure certification)
- Ultra-low power motors below 0.5A
- Long-term independent operation of single-phase motors
- Quick Selection Tips
New ultra-thin C-type SSD, 3 la 30 ampere range;
M stands for 220V AC power, Q shows maximum single-phase current;
Added unbalance and phase sequence protection, easy installation in narrow cabinets;
Set current to 1.1 ori valoarea nominală, extend start delay by one second extra.
- Conformitatea transportului aerian & Certification Qualifications
- Air Transportation Safety: No built-in lithium batteries or supercapacitors, fully compliant with UN38.3 standards. Shippable as general cargo without special MSDS documents.
- Authoritative Certifications: CE (EU), UL (North America), CCC (Certificare obligatorie din China), CSA, RoHS environmental protection certifications fully approved.
- Standard Compliance: Strictly implemented in accordance with international standard IEC 60947-4-1 for low-voltage motor protection.
