Circuit Breaker
Architecting the Foundation of Electrical Protection
In an era defined by increasingly complex and interconnected power systems, reliable electrical protection is not merely a component but a fundamental requirement for operational safety and system integrity. AIMRSE's Circuit Breaker division stands at the forefront of this critical field, engineering and supplying a comprehensive portfolio of protection and control devices designed to safeguard modern electrical infrastructure. From high-current main distribution feeders in industrial plants to sensitive residential ground-fault protection, our products form the essential defensive layer against overloads, short circuits, arc faults, and transient surges.
We bridge the critical gap between basic connectivity and intelligent, fail-safe power management. By integrating precision electromechanical engineering with advanced solid-state electronics, we empower electrical contractors, system integrators, and facility managers to design and maintain installations that are not only compliant with the strictest international standards but are resilient, energy-efficient, and future-proof.
Our commitment extends beyond hardware. We provide comprehensive technical consultation on protection coordination (selectivity), system design for fault current interruption, and integration with smart grid and building management systems (BMS), ensuring our solutions deliver optimal performance throughout their lifecycle.
Product Portfolio
ACB (Air Circuit Breaker)
AIMRSE's Air Circuit Breakers are engineered for primary protection and control in low-voltage distribution systems up to 6300A. Featuring advanced microprocessor-based trip units, they provide precise Long-Time, Short-Time, Instantaneous, and Ground-Fault protection (L-S-I-G). Their robust arc chute design ensures safe extinction of high-energy arcs under maximum short-circuit conditions. The modular, draw-out design facilitates easy maintenance and testing without disturbing the main busbar, minimizing downtime. Equipped with communication modules (Modbus, Profibus), they enable seamless integration into SCADA and energy management systems for real-time monitoring and control.
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Magnetic Latching Relay
AIMRSE's Magnetic Latching Relays are designed for energy-efficient switching in critical circuits where maintaining contact position during power loss is essential. Utilizing a permanent magnet and a pulse-driven coil, they require only a brief pulse of power to switch states, after which they remain latched without continuous coil energization. This eliminates coil heating, reduces energy consumption, and enhances overall system reliability. Ideal for smart meters, tariff control, automatic transfer schemes, and battery-backed systems, these relays offer long mechanical life, high load-switching capacity, and exceptional resistance to shock and vibration.
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RCCB (Residual Current Circuit Breaker)
AIMRSE's Residual Current Circuit Breakers provide essential protection against earth leakage currents, preventing electric shock and fire hazards. They continuously monitor the balance between live and neutral conductors, tripping within milliseconds if an imbalance (leakage to earth) is detected. Our range includes Type AC (for sinusoidal AC residual currents) and Type A (for pulsating DC and AC), making them suitable for modern circuits with electronic loads. Built-in surge immunity prevents nuisance tripping from transient voltages, while test buttons allow for regular functional verification. Available in 2-pole and 4-pole configurations for final sub-circuits and main switchboard protection.
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Reactive Power Compensation Controller
AIMRSE's Reactive Power Compensation Controllers are the brains behind automatic capacitor banks, optimizing power factor and reducing energy losses in electrical networks. By continuously monitoring voltage, current, and phase angle, they calculate the required reactive power and automatically switch capacitor steps in and out. Advanced models feature harmonic analysis capabilities to prevent resonance with network harmonics and prioritize switching to minimize transient inrush currents. With communication ports for remote monitoring and control, these controllers help utilities and industrial consumers avoid penalty charges, reduce distribution losses, and increase network capacity.
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Solid-state Relay (SSR)
AIMRSE's Solid-State Relays offer silent, reliable, and high-speed switching for a wide range of AC and DC loads. Utilizing semiconductor switching elements like thyristors or MOSFETs, they provide complete electrical isolation between low-voltage control circuits and high-voltage load circuits via an internal optocoupler. Key advantages include no moving parts (infinite cycle life), silent operation, resistance to shock and vibration, and fast switching speeds. Our AC SSRs feature zero-crossing switching to minimize electromagnetic interference (EMI) and inrush currents. They are ideal for heater control, motor starters, lighting systems, and other applications requiring frequent or precise switching.
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SPD (Surge Protection Device)
AIMRSE's Surge Protection Devices safeguard sensitive electronic equipment from transient overvoltages caused by lightning strikes or switching operations. Our comprehensive range covers the entire protection concept: Type 1 (coordination with external lightning protection system, high discharge capacity), Type 2 (main distribution board protection), and Type 3 (point-of-use protection). Utilizing Metal Oxide Varistor (MOV) and/or gas discharge tube technology, they rapidly clamp surge voltages to a safe level. Models feature thermal disconnectors for fail-safe operation, remote signaling contacts for alarm integration, and clear visual status indicators (green/red). Essential for protecting data centers, industrial controls, and renewable energy inverters.
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Timer Relay
AIMRSE's Timer Relays provide precise time-delay functions for automation and process control circuits. Offering a wide variety of timing modes—such as On-Delay, Off-Delay, Interval, Pulse Generation, and Star-Delta—they enable complex sequencing and control logic. Digital models feature easy-to-set controls via buttons and a clear LCD or LED display, while offering high accuracy and repeatability. Housed in compact DIN-rail enclosures, they integrate seamlessly into control panels. Applications include motor soft-start sequences, conveyor belt controls, lighting automation, pump alternation, and HVAC system management, enhancing efficiency and automating repetitive tasks.
View SpecificationsTechnical Deep Dive: Engineered for Safety & Precision
Air Circuit Breaker Technology
Our ACBs represent the pinnacle of low-voltage power interruption technology. The heart of the system is the microprocessor-based trip unit, which samples current waveforms thousands of times per second, applying advanced algorithms to distinguish between harmless temporary overloads and genuine fault currents. The arc chute assembly employs a series of de-ion plates that split, cool, and extinguish the arc rapidly. High-breaking capacity models utilize specially formulated silver-tungsten or silver-graphite contacts for exceptional electrical conductivity and resistance to welding. All units undergo rigorous testing per IEC 60947-2, including making and breaking tests at maximum rated short-circuit current and endurance tests exceeding 10,000 mechanical operations.
Residual Current Protection Dynamics
AIMRSE RCCBs employ a high-precision summation current transformer (toroidal core) and a sensitive magnetic latch release mechanism. For Type A devices, advanced electronic circuitry is integrated to properly evaluate pulsating DC leakage currents, which are common in circuits with rectifiers (e.g., VFDs, EV chargers). Key performance metrics include non-delay tripping at 0.5x IΔn, guaranteed tripping within 300ms at 1x IΔn, and non-tripping at 0.5x IΔn. They are designed with high immunity to voltage surges (impulse withstand voltage >6kV) and are tested for correct operation under extreme temperature and humidity conditions as per IEC 61008/61009.
Solid-State Switching & Control
Our Solid-State Relays and advanced controllers leverage semiconductor physics for unparalleled reliability. SSRs use optically coupled Triacs or back-to-back SCRs for AC switching, with snubber circuits to manage dv/dt. The zero-crossing detection circuit ensures switching occurs as the AC waveform passes through zero volts, drastically reducing EMI. Reactive Power Controllers utilize fast digital signal processors (DSPs) to perform real-time calculations of reactive power (kvar), often incorporating algorithms to avoid capacitor switching transients and to provide harmonic spectrum analysis up to the 50th order for system diagnostics.
Surge Protection & System Coordination
The intelligence of a surge protection system lies in proper coordination between Type 1, 2, and 3 SPDs. Our devices are characterized by key parameters: Maximum Continuous Operating Voltage (Uc), Voltage Protection Level (Up), Nominal Discharge Current (In), and Maximum Discharge Current (Imax). Using energy-coordinated designs and defined let-through voltage levels, we ensure that downstream SPDs activate only if the upstream device cannot handle the surge energy, providing a staged defense. All SPDs incorporate thermal disconnection fuses that permanently disconnect the MOV block in case of thermal overload, preventing fire risk, while maintaining the neutral-earth connection for system safety.
The AIMRSE Advantage
Application-Specific Engineering
We do not simply supply catalog items; we engineer solutions. Our team can modify trip unit settings, configure communication protocols, and design custom mounting kits for retrofitting older switchgear or integrating into specialized OEM applications, from mining equipment to marine vessels.
Global Certification & Local Support
Our products carry full international approvals: IEC, UL, CSA, CE, CCC, and more. Beyond certification, we provide localized technical support, including short-circuit current studies, protection coordination analysis, and on-site training for installation and maintenance crews.
Lifecycle Management & Spare Parts
We support our products for their entire operational life. This includes availability of spare parts like arc chutes, contact kits, and trip units for decades, firmware updates for intelligent devices, and refurbishment services for critical components, ensuring long-term system viability and reducing total cost of ownership.
Technical FAQ
How do I select the correct breaking capacity (Icu) for an ACB in my system?
What is the difference between Type A and Type AC RCCBs, and where should each be used?
Can your Solid-State Relays be used for DC load switching?
What is the expected service life of a Surge Protection Device?
Do your Timer Relays support cyclic (flasher) operation and external reset?
Ready to Secure Your Electrical System?
At AIMRSE, we understand that electrical protection is the cornerstone of any safe, reliable, and efficient power system. Whether you are designing a new facility, retrofitting an existing switchboard, or sourcing critical components for an OEM application, having the right protection strategy is non-negotiable. Our extensive portfolio of circuit breakers, relays, and controllers is backed by deep engineering expertise and a commitment to quality. Contact our technical specialists today for a detailed consultation, system analysis, and a tailored proposal designed to meet your specific protection and control requirements.
Note: Product specifications and performance data are subject to change. Actual performance depends on installation conditions and compliance with local codes. Consult with qualified professionals for specific applications.
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