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EOCRSSD-30DF7 is a digital motor protector manufactured by Schneider Electric (anciennement Samwha, Corée du Sud) avec plage de courant 3-30A et alimentation de contrôle 110VAC. Il offre une triple protection contre les surcharges, phase loss and locked rotor. It is applicable for precise protection of three-phase low-power motors, capable of replacing traditional thermal relays to improve protection accuracy and fault diagnosis efficiency.
- Définition du code modèle
| Segment de code | Description |
| EOCR | Electronic Over Current Relay, core product positioning |
| SSD | Solid State Digital, adopting solid-state electronic components and digital control technology |
| 30 | Current protection range: 3~30A (connexion directe, no external CT required) |
| D | Affichage numérique, equipped with digital tube to display real-time 3-phase average current and fault status |
| F7 | Control power specification: 110VAC±15% (50/60Hz); other options: M7(220ACC), B(24VCA/CC) |
- Principales spécifications techniques
| Catégorie | Paramètres | Remarques |
| Informations de base | ||
| Marque | Schneider Électrique (Former Samwha Korea) | Produced in Iksan, Korea; Authorized agent in China: Shanghai Hanshi Electric |
| Type de produit | Digital Overcurrent Relay / Protecteur de moteur | Une plus grande précision (±5%) than traditional thermal relay |
| Paramètres électriques | ||
| Tension de fonctionnement nominale | 600V et (UL) / 690V et (ASC, CEI 60947-4-1) | Suitable for low-voltage motor circuits |
| Tension de tenue aux impulsions nominale | 6kV | Conforme à la CEI 60947-4-1 |
| Puissance de contrôle | 110VAC±15%, 50/60Hz | Matched with F7 code |
| Consommation d'énergie | ≤3W | Faible consommation d'énergie pour un fonctionnement à long terme |
| Protection Parameters | ||
| Plage de courant réglable | 3~30A continuously adjustable | Adjustment ratio: 10:1 |
| Fonctions de protection | 1. Surintensité (O-Time: 0.5~10s adjustable) | Independent adjustable start delay D-Time |
| 2. Phase loss (fast protection within 3s) | ||
| 3. Locked rotor (combined D-Time+O-Time protection) | ||
| Mode de réinitialisation | Manuel / Électrique (facultatif) | Reset required after fault for restart |
| Sortir & Afficher | ||
| Contact de sortie | 1 Caroline du Nord + 1 NON (2-SPST) | Évaluation des contacts: 3A/250VAC |
| Mode d'affichage | Digital tube display | Real-time 3-phase average current, flashing fault code indication |
| Physique & Environnemental | ||
| Dimension | 45×75×110mm, standard DIN rail mounting | Compact size saves cabinet space |
| Degré de protection | IP20 (panneau avant) | Convient pour une installation à l'intérieur d'armoires de commande |
| Température de fonctionnement | -20℃ ~ +60℃ | Adaptable to industrial temperature variation |
| Température de stockage | -40℃ ~ +85℃ | Meet transportation and storage requirements |
| Attestation | ||
| Certifications internationales | CE, UL, ASC | Se conformer à la CEI 60947-4-1, global applicable |
| Conformité du fret aérien | Pas de batterie au lithium intégrée, conform to UN38.3 | Shippable as general cargo without special packaging |
- Comparaison entre marques
| Modèle | Plage actuelle | Puissance de contrôle | Afficher | Protection | Gamme de prix | Application |
| Schneider EOCRSSD-30DF7 | 3~30A | 110ACC | Affichage numérique | Surcharge / Phase loss / Locked rotor | 350~450CNY | 3-phase low-power motors with fault diagnosis demand |
| ABB CM-MSS.31P | 3~30A | 24~240VAC/DC | Voyant lumineux | Surcharge / Phase loss / Locked rotor | 400~500CNY | General industrial motors, unified brand matching |
| Siemens 3RB2026-1SB0 | 2.5~32A | 24~240VAC/DC | Voyant lumineux | Surcharge / Phase loss | 300~400CNY | Supporting Siemens PLC, protection de base |
| Omron K8DS-PH1 | 3~30A | 100~240 VCA | Affichage numérique | Surcharge / Phase loss / Locked rotor | 380~480CNY | Lignes de production automatisées, high-precision protection |
| Chint NR2-32 | 2.5~32A | No control power | No display | Surcharge / Phase loss | 50~80CNY | Economy application, low precision requirement |
Points clés de la sélection
- Display function: EOCRSSD-30DF7 supports real-time current monitoring and fault diagnosis, superior to indicator-light-only models
- Protection accuracy: Electronic protector (±5%) far exceeds thermal relay (±15%), extending motor service life
- Control power: 110VAC F7 version fits specific regional power grids, confirm on-site power supply first
- Liste des modèles de la série complète
EOCR-SSD Series Classification
| Plage actuelle | Modèle de base | Power Options | Exemples de modèles complets |
| 0.5~6A | EOCRSSD-05S | S:24~240VAC/DC | EOCRSSD-05DF7, EOCRSSD-05DM7, EOCRSSD-05Base de données |
| F7:110ACC | |||
| M7:220ACC | |||
| W:380~440VAC | |||
| 3~30A | EOCRSSD-30S | Idem que ci-dessus | EOCRSSD-30DF7, EOCRSSD-30DM7, EOCRSSD-30DW |
| 5~60A | EOCRSSD-60S | Idem que ci-dessus | EOCRSSD-60DF7, EOCRSSD-60DM7, EOCRSSD-60DS |
Code de commande & Accessoires
Numéro de commande standard: EOCRSSD-30DF7
Support de montage: EOCR-MNT-01 (DIN rail type)
Extension cable: EOCR-CAB-05 (5m) / EOCR-CAB-10 (10m)
Test kit: EOCR-TEST-KIT (including analog load & calibrator)
- Défauts courants & Solutions d'entretien
| Phénomène de défaut | Causes possibles | Étapes de dépannage | Solutions | Mesures préventives |
| No digital display | 1. Control power disconnected | 1. Mesurer la tension aux bornes | 1. Connect 110VAC correctly | Check power spec before installation |
| 2. Wrong wiring polarity | 2. Vérifier le câblage | 2. Adjust connection (AC non-polar) | ||
| 3. Internal fuse blown | 3. Inspect internal fuse | 3. Replace 0.5A fuse | ||
| Faux déclenchement | 1. Low current setting | 1. Confirm motor rated current | 1. Set current to 1.1 fois la valeur nominale | Set parameters per motor nameplate |
| 2. Short start delay | 2. Extend D-Time | 2. D-Time = motor start time +1s | ||
| 3. Power harmonic interference | 3. Test power THD | 3. Install power filter | ||
| Défaut de trébucher | 1. Excessively high current setting | 1. Check current setting | 1. Set current to 0.9 fois la valeur nominale | Regular contact inspection, éviter la surcharge |
| 2. Damaged output contacts | 2. Test contact continuity | 2. Replace contact module | ||
| 3. Panne du circuit interne | 3. Inspect internal components | 3. Contact after-sales service | ||
| Garbled display | 1. Fluctuation de tension | 1. Test power stability | 1. Install voltage stabilizer | Tenir à l'écart des onduleurs, ensure good grounding |
| 2. Interférence électromagnétique | 2. Check grounding | 2. Optimize grounding | ||
| 3. Erreur de programme | 3. Power cycle restart | 3. Restaurer les paramètres d'usine |
Cycle d'entretien
- Daily inspection: Check display status and alarm indicator
- Monthly maintenance: Dust cleaning, tighten wiring terminals
- Quarterly calibration: Verify protection parameter accuracy
- Annual overhaul: Inspect internal components, replace aging parts
- Scénarios d'application & Cas
Scénarios applicables
Automatisation industrielle: Machines-outils à commande numérique, convoyeurs, matériel d'impression
Traitement de l'eau: Pompes à eau, fans with frequent startup and variable load
CVC: Compresseurs d'air, ventilateurs de tour de refroidissement
Building materials industry: Mélangeurs, convoyeurs lourds
Power system: Standby generators, small transformer protection
Scénarios non recommandés
High voltage motors (>690V): Adopt dedicated high-voltage protectors
Explosion-proof environment: Extra explosion-proof housing required with higher cost
Ultra-low current (<0.5UN): Choose EOCRSSD-05S or match external CT
Cas typiques
Cas 1: Water Pump Motor Protection in Steel Plant
Problème: Frequent false tripping of old thermal relays causing unplanned shutdowns without fault identification
Solution: Install EOCRSSD-30DF7, set current 15A (motor rated 13.5A), start delay 5s
Effet: False shutdown rate reduced by 62%, fault diagnosis time shortened from 2h to 5min, annual maintenance cost saved about 80,000 CNY
Cas 2: Mixer System in Pharmaceutical Factory
Problème: Motor burnout caused by mixer locked rotor leading to heavy losses
Solution: Adopt EOCRSSD-30DF7, set locked rotor protection (D-Time=3s, O-Time=1s)
Effet: Power cut within 3s once locked rotor occurs, 100% motor intact rate, avoid production stop losses
- Règles de sélection
Règles de sélection rapide
- Correspondance actuelle: Set protection current within 0.9~1.1 times motor rated current
- Delay setting: Start delay (D-Time) = actual motor startup time + 1 deuxième
- Alimentation: Prioritize matching on-site control power to avoid extra transformer cost
- Display demand: Choose D-type for fault diagnosis, non-D-type for basic protection only
- Conformité du fret aérien & Certifications
- Air Freight Regulation
Pas de batteries au lithium ni de supercondensateurs intégrés, fully compliant with UN38.3 air transport standards
Can be delivered as general goods, no MSDS or special shipping documents needed
Packaging suggestion: Sac antistatique + hard carton to prevent vibration damage
- Qualification Certificates
CE: Comply with EU LVD & EMC directives
UL: Meet US safety standards for North America market
ASC: Certified for Canadian market
CEI: Conform to international electrical standards for global use
