المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
شرح النموذج
| Model Part | وصف |
| NXMLE | CHINT Kunlun Series Residual Current Operated قواطع دوائر (MCCB with earth leakage protection) |
| 630 | Frame rating current 630A |
| س | Breaking capacity class S (25kA at AC400V/415V, ultimate breaking capacity 50kA) |
| 4300أ | 4ص (three-phase four-wire, 3ف + ن), thermal-magnetic trip unit, standard version without accessories |
| 630أ | Rated operational current 630A |
- المعلمات الرئيسية
| فئة المعلمة | قيمة | ملحوظات |
| المعلمات الأساسية | ||
| يكتب | Moulded Case Circuit Breaker with Earth Leakage Protection (Residual Current Circuit Breaker) | Provides overload, short-circuit and earth leakage protection |
| البولنديين | 4ص (3ف + ن) | Three phases + neutral |
| Trip type | الحرارية المغناطيسية (Curve C) | For power distribution protection |
| Rated insulation voltage Ui | 800الخامس و | |
| Rated operational voltage Ue | 400V/415V AC (4ص) | |
| Rated frequency | 50/60هرتز | |
| Current Parameters | ||
| Frame current Inm | 630أ | |
| Rated current In | 630أ | |
| Residual operating current Iﾎ馬 | 100/200/300mA adjustable | Selectable per requirements |
| Residual current tripping time | 0.3s (معيار) | Fast personal safety protection |
| كسر القدرة | ||
| Rated service breaking capacity Ics | 25ال (AC400V) | Class S |
| Ultimate short-circuit breaking capacity Icu | 50ال (AC400V) | |
| وظائف الحماية | Long-time overload, short-time delay, instantaneous short-circuit, earth leakage protection | Full protection for circuits and equipment |
- Mounting Dimensions
| نوع التركيب | أبعاد (W×H×D, مم) | ملحوظات |
| مُثَبَّت (front/rear connection) | 280×280×100 | Standard 4P dimensions |
| Plug-in type | 280×280×120 | Including plug-in base |
| Mounting mode | مُثَبَّت / البرنامج المساعد | |
| 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:
Ambient temperature: -25℃ ~ 70℃
ارتفاع: ≥ 2000 م (derate if exceeded)
رطوبة: ≥ 95% (غير التكثيف)
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
- Maintenance:
Test monthly using the test button
Regularly check terminals for overheating
Keep clean to ensure heat dissipation
- استكشاف الأخطاء وإصلاحها
| Symptom | الأسباب المحتملة | الحلول |
| 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. Tighten terminals |
| 2. الزائد | 2. Reduce load | |
| 3. Poor ventilation | 3. Improve cooling |
- Brand Alternatives
| ماركة | النموذج البديل | التوافق |
| شنايدر | NSX630S TM630D 4P 3D (with Vigi module) | Same breaking capacity and rated current, similar dimensions |
| ايه بي بي | Tmax T6H630 PR221DS-LSI R630 4P (with RC221) | Matching protection, separate leakage module required |
| سيمنز | 3VL630N630 4P (with 30mA leakage add-on) | Same frame and rated current, compatible mounting |
| لذيذ | CDM3L-630S/4300A-630A | Direct Chinese alternative, identical dimensions and parameters |
| تشانغشو التبديل | CM3L-630S/4300A-630A | Matching technical data, compatible mounting |
- ملخص
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:
| نوع التركيب | الأبعاد الشاملة (W×H×D, مم) | Panel Cutout (مم) | ملحوظات |
| مُثَبَّت (front/rear) | 280×280×100 | 245×245 (bolt centers) | Standard 4P, front/rear fixed same |
| البرنامج المساعد | 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 (دبليو): 280mm – Standard 4P MCCB width, compatible with mainstream switchgear
- Height (ح): 280mm – Including operating handle, consistent with Kunlun 630A frame
- Depth (د):
Fixed type: 100مم
Plug-in type: 120مم (body + 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
- طرق التركيب
- 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
