Nale Electric is willing to work together with domestic and foreign merchants to create brilliance!
While digital microprocessor-based breakers have gained popularity in recent years, our engineering team has found that pure mechanical thermal-magnetic designs offer superior reliability in the dust-filled, vibration-prone environments of manufacturing floors and commercial HVAC substations. Digital components can fail prematurely when exposed to extreme temperatures, humidity, or electrical noise, leading to unexpected system shutdowns.
The CHNAILE NLM1-125L MCCB leverages time-tested mechanical physics to provide maintenance-free power protection for years of continuous operation. Built with a robust Category A architecture, this 125-ampere breaker instantly neutralizes catastrophic short circuits up to 35,000A (35kA) via its powerful electromagnetic coil. Engineered with an extremely compact arc-flash clearance of ≤50mm, it allows panel builders to design highly condensed, cost-effective distribution boards that save valuable floor space and reduce material costs. All units are manufactured in compliance with GB/T 14048.2 and IEC 60947-2 international standards, ensuring consistent performance across global markets.
Inverse-Time Overload Protection: The internal heavy-duty bimetallic strip bends predictably based on the exact temperature generated by the current. This allows a safe delay for temporary overloads (such as motor startups) while permanently severing the circuit if a dangerous sustained overload threatens to melt cable insulation. This balance prevents unnecessary shutdowns and extends equipment lifespan.
10In ± 20% Magnetic Motor Startup Immunity: Heavy 3-phase motors in conveyor belts and HVAC chillers draw massive transient surges when starting. Our fixed electromagnetic trip unit is expertly calibrated to 10 times the nominal current (1250A), guaranteeing the breaker ignores brief, safe starting surges while remaining deadly responsive to genuine instantaneous short circuits. This eliminates 90% of nuisance tripping incidents reported by our customers.
35kA Ultimate Breaking Capacity (Icu): Safely interrupts fault currents up to 35,000A, protecting your entire electrical system from catastrophic damage. This high breaking capacity makes the NLM1-125L suitable for installation in locations with high available fault currents.
25kA Service Breaking Capacity (Ics): Ensures the breaker remains fully functional after interrupting a short circuit, eliminating the need for immediate replacement and reducing maintenance costs.
Our highly efficient internal de-ion arc chutes restrict the external arc distance to under 50mm, enabling electrical contractors to install breakers closer together. This can reduce control cabinet dimensions by up to 30% compared to competing models, resulting in significant cost savings on materials and shipping.
8kV Atmospheric Surge Resilience: Industrial parks are prone to severe power grid fluctuations and lightning strikes. The NLM1-125L features 800V dielectric insulation and an 8kV Uimp rating, acting as a heavy-duty firewall against internal flashovers.
V0-Rated Anti-Tracking Casing: Molded from premium thermosetting plastics, the enclosure is immune to carbon tracking and maintains absolute structural integrity even when absorbing the intense thermal shockwaves generated during repetitive AC-3 motor start/stop operations.
Mechanical Safety Verification: Features a prominent red "Push to Trip" mechanical diagnostic button, allowing maintenance teams to manually trigger and verify the health of the internal spring-latch mechanism before authorizing line-voltage operations.
Parameter | Value |
|---|---|
Device Category | Thermal-Magnetic Molded Case Circuit Breaker (TM MCCB) |
Poles Configuration | 3P (Simultaneous 3-Phase Solid Disconnect) |
Frame Size (Inm) | 125A |
Rated Current (In) | 125A (Continuous Industrial Payload) |
Rated Operating Voltage (Ue) | AC 400V (50Hz) |
Rated Insulation Voltage (Ui) | 800V |
Impulse Withstand Voltage (Uimp) | 8kV |
Ultimate Breaking Capacity (Icu) | 35kA |
Service Breaking Capacity (Ics) | 25kA |
Instantaneous Magnetic Trip (Ii) | 10In ± 20% |
Arc Distance | ≤ 50mm |
Casing Material | V0-Rated Thermosetting Plastic |
Standard Compliance | GB/T 14048.2 / IEC 60947-2 |
Model and specification | Installation | Phases | Overall dimension(mm) | L(lang) W(wide) H(high) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
W | W1 | W2 | W3 | H | H1 | H2 | H3/H4 | L | L1 | L2 | L3 | AM | Y | |||
NLM1-63 | L | 3P | 78 | 25 | 13.5 | 27 | 92 | 74 | 66 | 19 | 135 | 116 | 85 | 49 | M5 | 40 |
H | 3P | 78 | 25 | 13.5 | 27 | 99 | 83 | 75 | 28 | |||||||
H | 4P | 103 | 25 | 13.5 | 27 | 99 | 83 | 75 | 28 | |||||||
NLM1-125 | L | 2P | 65 | 30 | 16 | 27 | 88 | 70 | 62 | 24 | 150 | 132 | 90 | 49 | M8 | 50 |
L | 3P | 92 | 30 | 16 | 27 | 88 | 70 | 62 | 24 | |||||||
M/H | 3P | 92 | 30 | 16 | 27 | 107 | 87 | 79 | 24 | |||||||
L | 4P | 122 | 30 | 16 | 27 | 88 | 70 | 62 | 24 | |||||||
M/H | 4P | 122 | 30 | 16 | 27 | 107 | 87 | 79 | 24 | |||||||
NLM1-250 | L | 2P | 75 | 35 | 22 | 27 | 112 | 89 | 82 | 24 | 165 | 144 | 102 | 52 | M8 | 70 |
L | 3P | 107 | 35 | 22 | 27 | 112 | 89 | 82 | 24 | |||||||
M/H | 3P | 107 | 35 | 22 | 27 | 126 | 105 | 98 | 24 | |||||||
L | 4P | 142 | 35 | 22 | 27 | 112 | 89 | 82 | 24 | |||||||
M/H | 4P | 142 | 35 | 22 | 27 | 126 | 105 | 98 | 24 | |||||||
NLM1-400 | L | 3P | 150 | 48 | 30 | 66 | 154 | 110 | 98 | 38/41 | 257 | 224 | 172 | 78 | M10 | 105 |
H | 4P | 198 | 48 | 30 | 66 | 154 | 110 | 98 | 38/41 | |||||||
NLM1-630 | L | 3P | 182 | 58 | 40 | 66 | 158 | 116 | 105 | 41/44 | 270 | 234 | 185 | 82 | M12 | 105 |
H | 4P | 240 | 58 | 40 | 66 | 158 | 116 | 105 | 41/44 | |||||||
NLM1-800 | L | 3P | 210 | 70 | 44 | 66 | 158 | 118 | 103 | 43/39 | 280 | 243 | 205 | 75 | M12 | 105 |
H | 4P | 280 | 70 | 44 | 66 | 158 | 118 | 103 | 43/39 | |||||||
Commercial HVAC Sub-Panels: Provides rugged, nuisance-free 3-phase protection for the massive compressors and blower motors of shopping mall air conditioning units, office buildings, and industrial cooling systems.
Automated Assembly Lines: Serves as the primary sub-distribution breaker powering robotic arms, long-run conveyor belts, and heavy packaging machinery in automotive, electronics, and consumer goods factories.
General Factory Floor Distribution: Acts as the highly cost-effective, reliable branch protection in the Main Distribution Boards (MDB) of textile mills, food processing plants, and light metallurgical facilities.
Water Treatment Pump Controls: Supplies safe, high-inrush tolerant power to centrifugal municipal water pumps and aeration blowers, ensuring uninterrupted water treatment operations.
Eliminate intermediary trading margins on essential panel-building components. Sourcing these high-volume thermal-magnetic MCCBs directly from our automated production lines drastically optimizes the BOM for your factory construction projects, with savings of up to 40% compared to traditional distribution channels.
Mechanical reliability is non-negotiable. Every CHNAILE MCCB undergoes rigorous testing before leaving our factory, including:
Thermal-bath calibration to verify the exact inverse-time curve
35kA short-circuit blast testing
10,000 mechanical operation cycles
Dielectric withstand testing at 2kV for 1 minute
This comprehensive quality assurance ensures flawless performance prior to global export.
We actively partner with global control panel manufacturers, providing customized solutions including:
Custom laser-engraved faceplates with your brand logo
Specifically tailored phase barriers for unique panel designs
Bespoke packaging to streamline your assembly process
Private labeling options
Our team of experienced electrical engineers provides multi-language technical support and complete product documentation, including detailed installation and maintenance manuals. We offer fast response times to technical inquiries and can assist with product selection for your specific application requirements.
Thermal protection uses a bimetallic strip that bends when heated by overload current, providing inverse-time protection against sustained overloads. Magnetic protection uses an electromagnetic coil that trips instantaneously when exposed to high short-circuit currents. The combination of both provides comprehensive circuit protection.
Induction motors draw 6-10 times their rated current when starting. A 10In magnetic trip setting ensures the breaker will not trip during these normal startup surges, while still providing protection against dangerous short circuits.
Breaking capacity is the maximum fault current that a circuit breaker can safely interrupt without sustaining damage. A 35kA breaking capacity means the breaker can safely interrupt currents up to 35,000 amperes.
The CHNAILE NLM1-125L MCCB is manufactured in compliance with GB/T 14048.2 and IEC 60947-2 international standards.
Yes, we offer comprehensive OEM services including custom branding, packaging, and product modifications to meet your specific requirements.
The CHNAILE NLM1-125L 3P 125A 35kA Thermal Magnetic MCCB is in stock and ready for immediate shipment. We offer competitive factory-direct pricing and flexible MOQ options, including 1 piece for sample orders.
