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Power Capacitors
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- Circuit Breaker
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BYM3-125L/H 3P Molded Case Circuit Breaker Three Phase MCCB 400V 125A
Main Parameters of BYM3-125L/H 3P Molded Case Circuit Breaker
| Model | BYM3-125L/H 3P Molded Case Circuit Breaker |
| Rated working voltage | 400V |
| Rated working current | 125A |
| Rated insulation voltage Ui | 800V |
| Rated impulse withstand voltage Uimp | 8V |
| Ultimate short-circuitbreaking capacity lcu (kA) | L:35,H:50 |
| Rated operational short-circuibreaking capacity lcs (kA) | L:20,H:36 |
| Mechanical with maintenance | 15000 |
| Protection type | Distribution prctection, Motor protection |
| Wiring method | Fixed front wiring,Fixed rear wiring ,Plug-in front wiring ,Plug-in rear wiring,Withdrawable rear wiring |
| Mounting method |
Screw'nut installation (8-12mm) (standard), Self-tapping screw installation (optional) Rail mounting (lH35)(optional) |
Overview of BYM3-125L/H 3P Molded Case Circuit Breaker
BYM3-125L/H 3P Molded Case Circuit Breaker (MCCB) is a high-performance, three-phase protection device designed for industrial, commercial, and residential electrical systems. Manufactured by Baoyu Holdings Co., Ltd., this MCCB offers comprehensive protection against overloads, short circuits, and voltage fluctuations, ensuring safety and efficiency in low-voltage applications. Key features include a 125A rated current, flame-resistant housing, compatibility with Schneider MCB systems, and compliance with international standards. Ideal for power distribution, energy management, and circuit safeguarding in the electric power industry, it efficiently handles three-phase currents, supports reliable load management, and simplifies installation for professionals. Enhance your electrical infrastructure with this durable, energy-efficient MCCB that combines advanced technology with global compliance.
Features of BYM3 - 125L/H 3P Molded Case Circuit Breaker
Advanced Three-Phase Overload & Short-Circuit Protection
The BYM3-125L/H 3P MCCB is engineered to deliver precision protection for three-phase electrical systems, safeguarding against circuit overload, short circuits, and voltage fluctuations. Its intelligent trip mechanism ensures rapid response to abnormal current spikes, minimizing downtime and equipment damage. Ideal for Schneider MCB integration, this breaker supports seamless installation in low-voltage power systems, making it a critical component for electric power industry applications.
Durable Moulded Case Design for Reliability
Featuring a flame-resistant moulded case housing, this MCCB offers superior protection against environmental hazards while maintaining compact dimensions for easy installation in confined spaces. Built to withstand harsh industrial conditions, it ensures long-lasting performance in power system devices, distribution boards, and control panels. The robust design aligns with global standards (IEC 60947-2), ensuring compliance and safety in commercial, residential, and industrial settings.
Versatile Low-Voltage Performance
With a rated current of 125A and compatibility with AC 400V/415V/690V systems, this power breaker excels in diverse low-voltage applications. It efficiently manages electricity loads in HVAC systems, data centers, and renewable energy installations, optimizing energy distribution and reducing power loss. The BYM3-125L/H is designed for professionals, streamlining electrical breaker installation and enhancing overall system efficiency.
Enhanced Safety & System Optimization
Beyond basic protection, this MCCB integrates under-voltage and phase imbalance safeguards, critical for protecting sensitive equipment in the electric power industry. Its energy-efficient design supports sustainable practices by minimizing energy waste, while the modular structure allows for easy upgrades. Trust Baoyu Holdings’ expertise in circuit protection to elevate your electrical infrastructure’s reliability and compliance.
Working Principle of BYM3 - 125L/H 3P Molded Case Circuit Breaker
Overload Protection: The thermal trip mechanism utilizes a bimetal strip that bends under sustained overcurrent conditions, triggering the release mechanism to disconnect the circuit within a predefined time frame. This ensures protection against prolonged overloads, which can lead to insulation degradation or fire hazards.
Short Circuit Protection: The electromagnetic trip unit activates instantaneously upon detecting a sudden surge in current (e.g., short circuits), leveraging a solenoid coil to generate magnetic force that trips the breaker within milliseconds, minimizing arc flash risks and equipment damage.
Three-Phase Coordination: Designed for three-phase power systems, the BYM3-125L/H ensures balanced protection across all phases, addressing issues like phase imbalance and harmonic distortions—critical for maintaining power quality in applications such as motor control centers, distribution panels, and renewable energy systems
Product Size Information
| Model | W | F | E | C1 | L | L1 | L2 | A | B | B1 | H1 | H2 | H3 | ∅D |
| BYM3 - 125L/H 3P | 25 | 21 | 34 | 83 | 130 | 233 | 111 | 25 | 75 | 100 | 56 | 66 | 80 | 4.0 |
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