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Safety and Protection
Low-voltage circuit breakers offer automatic disconnection in case of overload or short circuits, preventing damage and fires.
All three components contribute to a safer electrical environment, protecting both property and individuals. -
Reliability and Stability
Integrated protection functions in circuit breakers, such as leakage and overvoltage protection, enhance the reliability of electrical systems.
Surge protectors improve the stability of critical equipment and systems by reducing the impact of voltage fluctuations. -
Efficiency and Energy Conservation
Prompt disconnection of overloaded circuits by circuit breakers helps in saving energy and reducing waste.
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Maintenance and Cost Reduction
The ease of maintenance of low-voltage circuit breakers reduces service costs and downtime.
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What is the role of a Surge Protection Device (SPD)?
An SPD limits transient overvoltages (e.g., from lightning strikes, switching operations, or grid faults) by clamping voltage to safe levels and diverting surge current to ground, preventing equipment damage or data loss.
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What are the common sources of surges?
Surges can originate from:
Lightning strikes (direct or induced);
Grid switching (e.g., capacitor bank operations, motor startups);
Electrostatic discharge (ESD);
Electromagnetic interference from nearby high-power equipment (e.g., elevators, HVAC systems);
Grid faults (e.g., neutral line failure causing voltage spikes). -
What is the difference between an SPD and a lightning rod?
A lightning rod is an external lightning protection system for direct strike defense, while an SPD is an internal protection device that suppresses surges entering buildings via power/data lines to safeguard electronics.
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What are the installation requirements for SPDs?
Install as close as possible to protected equipment (≤10m distance).
Use short, thick grounding conductors (≤0.5m length) with grounding resistance ≤4Ω.
Avoid proximity to inductive loads (e.g., motors) to prevent false triggering.
Maintain 5–10m spacing between multi-stage SPDs or use decoupling devices.
