OEM 4P Drawout Air Circuit Breaker 1000A 65kA for Main Distribution Switchboards

A Dedicated Manufacturing Partner for Global Panel Builders and Switchgear Assemblers

In the highly competitive world of low-voltage electrical distribution, switchgear manufacturers and panel builders require much more than just a reliable component—they need a steadfast, scalable, and responsive supply chain partner. At CHNAILE, we engineer our Air Circuit Breakers (ACBs) not just for the end-user, but specifically for the technicians and engineers who assemble the panels. The CHNAILE 4-Pole 1000A Drawout Air Circuit Breaker (mounted on a robust 1600A frame) represents the pinnacle of OEM-focused electrical engineering.

This heavy-duty switchgear is meticulously crafted for seamless integration into Main Distribution Boards (MDBs), Motor Control Centers (MCCs), and complex generator synchronization panels. Capable of safely routing massive continuous loads up to 1000 Amperes across a 4-wire (3-Phase + Neutral) network, it forms the indestructible core of your premium switchboard assemblies. Operating smoothly at AC 400V/690V and boasting an incredible 65,000A (65kA) ultimate short-circuit breaking capacity, this ACB ensures that the electrical panels you manufacture will survive the most catastrophic grid faults. Designed explicitly for high-volume B2B partnerships, CHNAILE offers comprehensive OEM and white-labeling solutions, allowing international electrical manufacturers to deliver world-class, IEC-compliant power distribution systems under their own proprietary brand names, while significantly optimizing their Bill of Materials (BOM).

Technical Parameters

Optimized for Streamlined Switchboard Assembly and Rapid Integration

We know that in a panel building factory, assembly efficiency directly dictates your profit margins. Every hour your technicians spend struggling to align busbars or retrofit accessories is money lost. Therefore, we have designed the NLW1-1600/4 to be the most "assembler-friendly" circuit breaker on the global market.

• Standardized Drawout Chassis (Withdrawable Cradle):
  The foundation of this unit is its heavy-duty, highly standardized drawout cradle. During panel construction, your assembly line workers only need to bolt the empty cradle into the switchgear enclosure and connect it to the main copper busbars. The incredibly heavy 1000A breaker body can be left out of the cabinet until the very last stage of testing, making the physical assembly process significantly lighter and safer. Once the cabinet is wired, the breaker body is effortlessly racked in using the integrated mechanical drive, seamlessly transitioning through the 'Disconnected', 'Test', and 'Connected' positions. This modularity not only speeds up your factory production but provides your end-clients with rapid, hot-swappable maintenance capabilities.

• Massive Thermal-Optimized Busbar Terminations:
  Routing 1000 Amps continuously generates substantial thermal stress. The rear connection terminals of the cradle are significantly oversized and heavily silver-plated. They are meticulously engineered to align perfectly with standard heavy-gauge copper busbars used in commercial switchboards. This ensures maximum clamping torque, minimizes contact resistance, and eliminates thermal bottlenecks, guaranteeing that your assembled panels will pass rigorous temperature-rise tests without failure.

• Pre-Integrated Motorized Accessories:
  Modern MDBs demand complex automated control schematics, integrating with BMS (Building Management Systems) and SCADA networks. To save your technicians hours of manual accessory retrofitting and complex internal wiring, this 1000A ACB comes factory-equipped with vital automation components. It includes an AC 230V closing electromagnet, a highly responsive shunt release, an under-voltage release, and a motorized spring-charging mechanism. It is ready for remote operation straight out of the box.

Advanced Secondary Control Matrix and Intelligent Calibration

A modern Main Distribution Board is defined by its intelligence. The CHNAILE ACB empowers your switchgear with unparalleled digital control and fault diagnostic capabilities.

• Comprehensive 47-Pin Secondary Control Matrix:
  Clearly visible at the top of the drawout chassis is a massive, highly accessible 47-pin secondary wiring terminal block. This centralized hub empowers your control engineers to seamlessly wire customized external PLCs, remote motorized charging actuators, and auxiliary safety loops without fighting for space inside the dense breaker housing. This clean, organized approach to secondary wiring significantly reduces human error during your factory's wiring phase.

• Microprocessor-Based LSIG Protection:
  Modern infrastructure projects demand strict selective coordination to prevent facility-wide blackouts. The integrated intelligent controller (featuring a clear digital LCD) allows your engineers to program precise protection curves. You can meticulously configure the parameters for Long-time overload (Ir, tr), Short-time delay (Isd, tsd), Instantaneous short-circuit (Ii), and Ground-fault protection.

• Complete 4-Pole Neutral Isolation:
  For panel builders constructing Automatic Transfer Switch (ATS) panels or generator tie-ins, a 4-pole architecture is a strict legal mandate. By simultaneously switching the L1, L2, L3, and Neutral conductors, this ACB prevents lethal circulating ground currents between the municipal grid and backup generators, ensuring your custom panels meet the highest international safety codes.

• Factory Pre-Setting Services:
  As a direct source manufacturer, we offer bespoke factory pre-setting services. We can calibrate the digital trip units to your exact project specifications and engineering blueprints before bulk shipping. This eliminates the need for your technicians to manually program hundreds of breakers, significantly reducing your on-site commissioning time and labor costs.

Complete OEM/ODM and Supply Chain Dominance

When you partner with CHNAILE, you are not just buying a switch; you are integrating a massive manufacturing powerhouse into your own supply chain. We are dedicated to making your brand succeed in the global electrical market.

• Private Labeling & Faceplate Customization (White-Labeling):
  Elevate your company's brand identity. We offer customized laser-engraving or silk-screening of your company logo directly onto the breaker faceplates. We can provide tailored instructional labeling, custom language interfaces for the digital controller, and even custom-colored control buttons (such as the standard red/green/yellow indicators) to perfectly match your corporate design language. Your clients will see a premium product carrying your trusted brand name.

• Certified Quality to Help Your Panels Pass Inspection:
  Your completed switchgear assemblies need to pass strict regional and international certifications (such as ASTA, KEMA, or CE). Our ACBs are rigorously tested in our state-of-the-art laboratories to exceed GB/T 14048.2 and IEC 60947-2 standards. We provide all necessary technical documentation, detailed thermal dissipation test reports, and compliance certificates to facilitate the smooth and rapid certification of your final electrical cabinet assemblies.

• Stable Manufacturing Lead Times & Bulk Pricing:
  Avoid costly supply chain disruptions that halt your assembly lines. With our immense, highly automated manufacturing capacity, we guarantee exceptionally stable lead times even for massive bulk ACB orders. By sourcing directly from our factory, you eliminate intermediary trading company markups, securing highly aggressive wholesale pricing that drastically improves the profitability of your large-scale infrastructure bids.

Partner with CHNAILE today. Let our precision engineering and dedicated B2B supply chain solutions power the success of your switchgear manufacturing business.

Instruction Manual for Nailer W1 Series Air Circuit Breakers.pdf