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Product Overview
In mission-critical environments like hospital operating theatres and hyperscale data centers, a power grid failure automatically triggers massive backup diesel generators. During this transition, using standard 3-pole breakers leaves the neutral wire connected, risking deadly circulating ground currents that can fry sensitive electronics and endanger lives. The CHNAILE Intelligent 4-Pole Air Circuit Breaker (ACB) is explicitly designed to eliminate this hazard. Rated for a continuous 1000-Ampere payload, this colossal switchgear features a dedicated, synchronized 4th pole for the Neutral line. Mounted on a heavy-duty drawout cradle and managed by a sophisticated digital microprocessor, it delivers impenetrable 65kA fault suppression and flawless selective coordination for your most critical power networks.
Technical Parameters
| Device Category: | Air Circuit Breaker (ACB / Universal Circuit Breaker) |
| Poles Configuration: | 4P (Simultaneous 3-Phase + Neutral Isolation) |
| Rated Current (In): | 1000A (Calibrated for massive commercial loads) |
| Rated Operating Voltage (Ue): | AC 400V / 690V |
| Rated Insulation Voltage (Ui): | 1000V |
| Rated Impulse Withstand Voltage (Uimp): | 12kV (Extreme grid surge and lightning defense) |
| Ultimate Breaking Capacity (Icu): | 65kA (High-tier open-air plasma suppression) |
| Control Core: | Intelligent Microprocessor Trip Unit (with LCD interface) |
| Installation Architecture: | Drawout / Withdrawable Type (Cradle mounted) |
| Standard Compliance: | GB/T 14048.2 / IEC 60947-2 |
1. Uncompromising 4-Pole Safety & Intelligence
Complete Galvanic Isolation (4P): The mechanical linkage ensures the Neutral pole opens and closes in perfect synchronization with L1, L2, and L3. This provides 100% true physical isolation from the utility grid, ensuring safe operation of backup generators and absolute safety for maintenance personnel working on the isolated panels.
Advanced LSIG Microprocessor Coordination: The digital interface allows engineers to sculpt surgical protection curves. By precisely adjusting Long-delay, Short-delay, Instantaneous, and Ground-fault (LSIG) thresholds, this 1000A master breaker coordinates flawlessly with downstream sub-breakers, preventing a localized fault from shutting down an entire hospital wing.
12kV Atmospheric Surge Firewall: Medical facilities and large data centers cannot tolerate voltage spikes. The massive 1000V internal dielectric insulation and 12kV Uimp rating act as an impenetrable firewall, shielding downstream life-support systems and servers from catastrophic lightning strikes.
2. Heavy-Duty Drawout Engineering
Rapid-Maintenance Drawout Chassis: In 24/7 facilities, unbolting massive 1000A cables for routine servicing is impossible. This 4P ACB rests on a heavy-duty racking cradle. Technicians simply use the manual crank to seamlessly transition the breaker between 'Connected', 'Test', and 'Disconnected' positions, replacing the entire core unit in minutes without de-energizing the main busbars.
65kA Explosive Arc Vaporization: When a grid-level short circuit occurs, the immense magnetic forces drive the plasma arc into massive metallic arc chutes. The open-air architecture rapidly fragments, cools, and exhausts the 65,000A plasma safely away from the control panel.
Spring-Charged Kinetic Actuation: Closing four massive 1000A contacts requires immense instantaneous force to prevent micro-welding. The heavy-duty spring energy storage system ensures the copper pads snap shut with explosive, uncompromising speed.
3. Target Application Scenarios
Due to its mandatory 4-pole neutral isolation and 1000A capacity, this ACB is exclusively specified by top-tier EPCs for:
Hospital & Healthcare ATS Panels: Serving as the life-saving Automatic Transfer Switch (ATS) main incomer between municipal grids and backup hospital generators.
Data Center Generator Synchronization: Preventing neutral circulating currents when switching power feeds for hyperscale server farm UPS backups.
Telecommunication Core Hubs: Providing completely isolated, surge-proof power to heavy-duty rectifiers and backup battery arrays.
Heavy Chemical Manufacturing: Ensuring strict personnel safety and 4-wire equipment isolation in damp or hazardous industrial environments.
4. Global B2B Partnership with CHNAILE Factory
Direct Supply of Mega-Switchgear: ACBs are high-capital investments. Sourcing these massive 4P units directly from our manufacturing plant eliminates exorbitant international distributor markups, drastically optimizing your EPC project budgets.
Rigorous Factory Acceptance Testing (FAT): Handling megawatt loads leaves zero margin for error. Every single 4-Pole ACB undergoes exhaustive automated secondary injection testing, verifying the absolute microsecond precision of the LSIG microprocessor prior to global export.
OEM Integration for Switchboard Builders: We actively partner with elite panel builders worldwide, providing comprehensive technical racking support, customized motorized control voltages, and bespoke branding for your premium MDB cabinets.
