To effectively prevent surges in distribution lines, the following practices are required:
Surge protector
It is effective to install surge protection devices (SPDs) in stages of 1 to 3 at the main entry points of distribution lines, distribution panels, and terminal devices.
An effective structure is to install Type 1 SPD at the power inlet, Type 2 at the distribution panel, and Type 3 in front of individual equipment.
Each SPD quickly absorbs various types of overvoltages, such as lightning and switching surges, and responds to surges flowing into the line.
Surge monitoring
It is important to know what kind of surge, when, and how large it was. This data should serve as a standard for establishing surge countermeasures, and surge data is essential for analyzing electrical accidents. 88.3% of damage and malfunctions in digital systems of electrical products originate from surges. Surges are unexpected energy flows from outside or inside, causing damage to all areas that use electrical energy.
It causes.
Reinforcement of grounding system
Properly grounding all SPDs and related protective devices within distribution lines will quickly dissipate transient surges to ground, preventing equipment malfunctions and damage. Grounding resistance must be maintained below standard levels, and grounding point distribution must also be considered.
Wiring/Equipment Shielding and Maintenance
Installing metal shielding around wiring and equipment can prevent external surges, such as lightning strikes and EMI, from directly entering the line. Regular inspections and prompt repair or replacement of aging wiring and equipment are also essential preventative measures.
Optimization of installation and wiring methods
Surge protection wiring should be kept as short and straight as possible to ensure a fast response. Centralized surge protection within distribution panels and individual protection of distributed end devices are also important. Placing a miniature circuit breaker in front of the SPD provides additional safety.
Systematic application of these measures provides effective protection against various external surges in distribution lines.