In the modern low-voltage power distribution system, transient surges caused by lightning strikes, power grid switching, and equipment operation pose a serious threat to electrical devices. Once a surge occurs, it may lead to damage to sensitive components, equipment failure, or even fire accidents. Therefore, a Surge Protection Device (SPD) has become an essential safety component in the power distribution system. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) has launched the CJ-T1T2-AC series SPD, which provides reliable surge protection for low-voltage equipment.
The Core Definition of Surge Protection Device
Surge protection device (SPD) for installation in a low-voltage distribution system. A surge protector limits the voltage supplied to the electrical devices to a certain threshold by short-circuiting current to ground or absorbing the spike when a transient occurs, thus avoiding damage to the devices connected to it. Simply put, an SPD is a “voltage regulator” and “surge absorber” in the power system. It monitors the voltage status in real time. When an abnormal voltage surge occurs, it quickly acts to divert the excess current to the ground or absorb the surge energy, ensuring that the voltage supplied to the electrical equipment is within a safe range.
Different from ordinary protective components, a Surge Protection Device has the characteristics of fast response speed and strong surge handling capacity. It can act within microseconds to suppress transient surges, which is crucial for protecting precision electrical equipment and ensuring the stable operation of the power system.
Core Functions of Surge Protection Device (SPD)
As a professional protective component, the Surge Protection Device integrates multiple functions to form a comprehensive surge defense line for the power distribution system:
- Voltage limiting protection: Quickly limit the transient overvoltage to a safe threshold when a surge occurs, avoiding damage to equipment caused by excessive voltage
- Surge current diversion: Divert the large surge current generated by lightning strikes or other faults to the ground through a low-resistance path, reducing the impact on the main circuit
- Energy absorption: Absorb the excess energy generated by the surge through internal components (such as MOV, GDT), preventing the energy from acting on electrical equipment
- Fault indication: Provide visual or remote fault alarm signals, enabling users to timely discover and handle SPD faults, ensuring the effectiveness of protection
- System compatibility: Adapt to different power supply systems and installation environments, ensuring that the normal operation of the power system is not affected while providing protection
C&J Electrical’s CJ-T1T2-AC SPD: Core Advantages & Technical Specifications
C&J Electrical’s CJ-T1T2-AC series SPD is a high-performance surge protection device, mainly used in LPZ0A – 1 and above areas to protect low-voltage equipment from lightning strikes and surge damage. It is suitable for various power supply systems of PSD Class I + II (Class B + C) and designed in accordance with IEC 61643-1/GB 18802.1 standards. Its core advantages and technical specifications are as follows:
Core Structural Features & Advantages
- Dual waveform spark gap: 10/350μs and 8/20μs, adapting to different types of surge impacts (lightning surge and operating surge)
- Single-pole arrester with pluggable design: Easy to install, maintain and replace without interrupting the power supply
- Sealed GDT technology: Equipped with strong follow-up current extinguishing capacity, ensuring reliable operation after surge absorption
- Ultra-low voltage protection level: Minimizes the impact of surge on the normal operation of equipment, protecting precision components
- Dual ports: Supports parallel or series (V-shaped) connection, flexible to adapt to different installation requirements
- Multi-functional connection: Suitable for conductors and busbars, expanding the scope of application
- Fault indication & remote alarm: Green window turns red when faulty, and a remote alarm port is provided for real-time monitoring and early warning
- High-performance MOV: Maximum lightning impulse current up to 7kA (10/350μs), strong surge energy absorption capacity
Key Technical Parameters
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Parameter
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Details
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|---|---|
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Lightning impulse current (10/350μs) [Iimp]
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7kA
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|
Rated discharge current (8/20μs) [In]
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20kA
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|
Maximum discharge current [Imax]
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50kA
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Voltage protection level [Up]
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1.5kV
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|
Installation method
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35mm rail mounting
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|
Compliance standard
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IEC60947-2
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Versatile Application Scenarios
With its excellent protection performance and flexible installation methods, the CJ-T1T2-AC series Surge Protection Device is widely used in various low-voltage power distribution systems, including:
- Industrial and mining enterprises: Factories, workshops, power distribution rooms (protecting production equipment, control systems, and power distribution components)
- Commercial buildings: Shopping malls, hotels, office buildings, data centers (protecting HVAC systems, elevators, security equipment, and precision IT equipment)
- Residential areas: High-rise apartments, villas (protecting home electrical appliances, smart home systems, and building power distribution lines)
- Infrastructure projects: Transportation hubs (airports, stations), communication base stations, water treatment plants, and power stations
- Public facilities: Hospitals, schools, libraries, and stadiums (protecting medical equipment, teaching equipment, and public power supply systems)
Why Choose C&J Electrical’s CJ-T1T2-AC SPD?
In the field of Surge Protection Device, the CJ-T1T2-AC series from C&J Electrical has obvious competitive advantages:
- Comprehensive protection: Covers both lightning surge and operating surge, suitable for LPZ0A-1 and above areas, with wide protection range
- Reliable performance: Adopts sealed GDT technology and high-performance MOV, with strong surge handling capacity and follow-up current extinguishing capacity
- Flexible installation: Supports multiple connection methods and 35mm standard rail mounting, adapting to different installation environments
- Intelligent monitoring: Equipped with visual fault indication and remote alarm function, facilitating timely maintenance and management
- International standard compliance: Meets IEC 61643-1/GB 18802.1 and IEC60947-2 standards, ensuring product quality and safety performance
Get in Touch
If you have any questions about the CJ-T1T2-AC series Surge Protection Device, such as product specifications, technical details, customization needs, or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with tailored surge protection solutions to ensure the safe and stable operation of your power distribution system.
Post time: Dec-24-2025