Contacteur,disjoncteur,onduleur solaire,compteur électrique,batteries solaires
Model Explanation
| Model Part | Description |
| NXMLE | CHINT Kunlun Series Residual Current Operated Disjoncteur (MCCB with earth leakage protection) |
| 630 | Frame rating current 630A |
| S | Breaking capacity class S (25kA at AC400V/415V, ultimate breaking capacity 50kA) |
| 4300UN | 4P. (triphasé à quatre fils, 3P+N), thermal-magnetic trip unit, standard version without accessories |
| 630UN | Rated operational current 630A |
- Paramètres clés
| Catégorie de paramètre | Valeur | Remarques |
| Paramètres de base | ||
| Taper | Moulded Case Circuit Breaker with Earth Leakage Protection (Disjoncteur à courant résiduel) | Provides overload, short-circuit and earth leakage protection |
| Poteaux | 4P. (3P+N) | Three phases + neutral |
| Trip type | Thermal-magnetic (Curve C) | For power distribution protection |
| Tension assignée d'isolement Ui | 800V et | |
| Tension assignée d'emploi Ue | 400V/415V AC (4P.) | |
| Rated frequency | 50/60Hz | |
| Current Parameters | ||
| Frame current Inm | 630UN | |
| Courant nominal In | 630UN | |
| Residual operating current Iﾎ馬 | 100/200/300mA adjustable | Selectable per requirements |
| Residual current tripping time | 0.3s (standard) | Fast personal safety protection |
| Capacité de coupure | ||
| Rated service breaking capacity Ics | 25le (AC400V) | Class S |
| Ultimate short-circuit breaking capacity Icu | 50le (AC400V) | |
| Fonctions de protection | Long-time overload, short-time delay, instantaneous short-circuit, earth leakage protection | Full protection for circuits and equipment |
- Mounting Dimensions
| Mounting Type | Dimensions (L×H×P, mm) | Remarques |
| Fixé (front/rear connection) | 280×280×100 | Standard 4P dimensions |
| Plug-in type | 280×280×120 | Including plug-in base |
| Mounting mode | Fixé / Plug-in | |
| Connection type | Front / Rear connection | Rear connection requires special kit |
| Terminal size | M12 hex socket screw | For large cross-section cables |
- Applications
- Low-voltage distribution systems: Main or branch protection for three-phase four-wire circuits up to 630A
- Industrial equipment protection: Protect motors, transformers and other electrical devices against overload, short-circuit and earth leakage
- Building electrical: Main and sub-distribution boards in commercial buildings and industrial plants
- Personal safety: Indirect contact protection against fatal electric shock
- Electrical fire prevention: Protection against earth fault current induced electrical fires
- Operating Notes
- Ambient conditions:
Température ambiante: -25℃ ~ 70℃
Altitude: ≤ 2000m (derate if exceeded)
Humidité: ≤ 95% (non-condensing)
Avoid flammable, explosive or highly corrosive environments
- Wiring requirements:
Strictly separate N line and phase lines; N line must pass through the leakage detection transformer
Terminals must be securely tightened to avoid overheating
Cable cross-section suitable for 630A (≥ 185mm² copper recommended)
- Selection matching:
Residual current: 300mA for general distribution, 30mA for personal protection (special model)
Breaking capacity must match system short-circuit current; Class S suitable for general industry
- Entretien:
Test monthly using the test button
Regularly check terminals for overheating
Keep clean to ensure heat dissipation
- Troubleshooting
| Symptom | Causes possibles | Solutions |
| Trips immediately after closing | 1. Short circuit | 1. Locate short circuit |
| 2. Residual current too low | 2. Adjust to suitable Iﾎ馬 | |
| 3. Trip unit fault | 3. Replace trip unit | |
| Fails to trip on overload | 1. Thermal trip failure | 1. Replace thermal trip |
| 2. Over-current setting too high | 2. Reset current setting | |
| Fails to trip on earth leakage | 1. Leakage module fault | 1. Replace leakage module |
| 2. N line not through CT | 2. Rewire correctly | |
| 3. Test button fault | 3. Replace test button | |
| Excessive heating during operation | 1. Loose connections | 1. Serrer les bornes |
| 2. Surcharge | 2. Reduce load | |
| 3. Poor ventilation | 3. Improve cooling |
- Brand Alternatives
| Marque | Alternative Model | Compatibilité |
| Schneider | NSX630S TM630D 4P 3D (with Vigi module) | Same breaking capacity and rated current, similar dimensions |
| ABB | Tmax T6H630 PR221DS-LSI R630 4P (with RC221) | Matching protection, separate leakage module required |
| Siemens | 3VL630N630 4P (with 30mA leakage add-on) | Same frame and rated current, compatible mounting |
| Délicieux | CDM3L-630S/4300A-630A | Direct Chinese alternative, identical dimensions and parameters |
| Changshu Switch | CM3L-630S/4300A-630A | Matching technical data, compatible mounting |
- Résumé
CHINT NXMLE‑630S/4300A‑630A is a high-performance 4P earth leakage MCCB for 630A three‑phase four‑wire distribution systems. It provides overload, short‑circuit and earth leakage protection, with Class S breaking capacity suitable for general industrial applications. Its thermal‑magnetic trip (Curve C) is ideal for distribution, effectively protecting equipment and personnel. Correct selection of residual current and proper installation are essential; regular maintenance ensures long service life and reliable protection.
CHINT NXMLE-630S/4300A-630A Mounting Dimensions
- Overall Mounting Dimensions
Mounting dimensions vary slightly by installation type. Official standard values:
| Mounting Type | Dimensions hors tout (L×H×P, mm) | Panel Cutout (mm) | Remarques |
| Fixé (front/rear) | 280×280×100 | 245×245 (bolt centers) | Standard 4P, front/rear fixed same |
| Plug-in | 280×280×120 | 245×245 (base centers) | Includes base depth |
| Rear connection (special) | 280×280×100 | 245×245 | Requires rear connection kit |
- Key Dimension Details
- Width (W): 280mm – Standard 4P MCCB width, compatible with mainstream switchgear
- Height (H): 280mm – Including operating handle, consistent with Kunlun 630A frame
- Depth (D):
Fixed type: 100mm
Plug-in type: 120mm (corps + base)
- Mounting bolts: M12 hex socket for high-current 630A application
- Mounting plate thickness: ≥ 6mm recommended for strength and cooling
- Minimum clearances: ≥25mm left/right, ≥50mm top/bottom for operation and ventilation
- Méthodes de montage
- Fixed mounting: Most common, bolted directly to panel; front or rear connection
- Plug-in mounting: Uses dedicated base for fast replacement, suitable for frequent maintenance
- Rear connection: Terminals on rear side, saves front panel space and improves layout
- Installation Notes
Install vertically or horizontally, tilt angle ≤ 15°
Correctly separate N and phase lines; N must pass through leakage transformer
Check and tighten all terminals after installation
Allow sufficient ventilation to prevent overheating
