CHINT NXMLE-630S/4300A-630A

Model Explanation

Model Part	Description
XMLE	CHINT Kunlun Series Residual Current Operated เบรกเกอร์ (MCCB with earth leakage protection)
630	Frame rating current 630A
ส	Breaking capacity class S (25kA at AC400V/415V, ultimate breaking capacity 50kA)
4300ก	4ป (three-phase four-wire, 3พี+เอ็น), thermal-magnetic trip unit, standard version without accessories
630ก	Rated operational current 630A

พารามิเตอร์ที่สำคัญ

Parameter Category	ค่า	หมายเหตุ
พารามิเตอร์พื้นฐาน
พิมพ์	Moulded Case Circuit Breaker with Earth Leakage Protection (Residual Current Circuit Breaker)	Provides overload, short-circuit and earth leakage protection
Poles	4ป (3พี+เอ็น)	Three phases + neutral
Trip type	Thermal-magnetic (เส้นโค้ง C)	For power distribution protection
Rated insulation voltage Ui	800วีและ
Rated operational voltage Ue	400V/415V AC (4ป)
Rated frequency	50/60Hz
Current Parameters
Frame current Inm	630ก
Rated current In	630ก
Residual operating current Iﾎ馬	100/200/300mA adjustable	Selectable per requirements
Residual current tripping time	0.3ส (มาตรฐาน)	Fast personal safety protection
ทำลายความจุ
Rated service breaking capacity Ics	25ที่ (AC400V)	คลาส S
Ultimate short-circuit breaking capacity Icu	50ที่ (AC400V)
Protection Functions	Long-time overload, short-time delay, instantaneous short-circuit, earth leakage protection	Full protection for circuits and equipment

Mounting Dimensions

Mounting Type	ขนาด (W×H×D, มม)	หมายเหตุ
ที่ตายตัว (front/rear connection)	280×280×100	Standard 4P dimensions
Plug-in type	280×280×120	Including plug-in base
Mounting mode	ที่ตายตัว / 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:

อุณหภูมิแวดล้อม: -25℃ ~ 70℃

ระดับความสูง: ≤ 2000m (derate if exceeded)

ความชื้น: ≤ 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

Maintenance:

Test monthly using the test button

Regularly check terminals for overheating

Keep clean to ensure heat dissipation

การแก้ไขปัญหา

Symptom	สาเหตุที่เป็นไปได้	โซลูชั่น
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
Fails to trip on overload	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. Overload	2. Reduce load
	3. Poor ventilation	3. Improve cooling

Brand Alternatives

ยี่ห้อ	รูปแบบทางเลือก	ความเข้ากันได้
ชไนเดอร์	NSX630S TM630D 4P 3D (with Vigi module)	Same breaking capacity and rated current, similar dimensions
เอบีบี	Tmax T6H630 PR221DS-LSI R630 4P (with RC221)	Matching protection, separate leakage module required
ซีเมนส์	3VL630N630 4P (with 30mA leakage add-on)	Same frame and rated current, compatible mounting
อร่อย	CDM3L-630S/4300A-630A	Direct Chinese alternative, identical dimensions and parameters
Changshu Switch	CM3L-630S/4300A-630A	Matching technical data, compatible mounting

สรุป

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 (เส้นโค้ง 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	ขนาดโดยรวม (W×H×D, มม)	Panel Cutout (มม)	หมายเหตุ
ที่ตายตัว (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 (ว): 280mm – Standard 4P MCCB width, compatible with mainstream switchgear
Height (H): 280mm – Including operating handle, consistent with Kunlun 630A frame
Depth (ดี):

Fixed type: 100มม

Plug-in type: 120มม (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
Mounting Methods
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
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