接地问题（Grounding problem）.docVIP

接地问题（Grounding problem） 1. If the lightning rod has been installed, need the surge protector? You need it. Lightning rods are no substitute for surge protectors. A lightning rod makes most of the harmful energy produced by direct strikes from the outside of the building, thereby avoiding a building fire or explosion. But lightning can produce a huge magnetic field and generate strong overvoltage on power lines and data lines. This is known as induction. If a high quality surge protector is installed, the sensitive electrical equipment in the building can be protected. But if a low-quality surge protector is installed or is not installed, the equipment will be destroyed. There are many instances of this, which are no longer listed here. 2. What is the difference between the power cord protector (SPD) and the data line protector (DLP)? Is it possible to install only one type of protection? Not only will the surge pass through the power cord, but it will also damage the device through the data line. Any electrical equipment connected to the power supply will be damaged by the electrical surge of the power cord. Devices that are connected to a modem or computer network also require a data line surge protector to prevent electrical surges. 3. How to select the type and installation location of the surge protector? The biggest surge occurs outside buildings, caused by lightning and power companies switching loads, which can be transmitted along power lines and into buildings. Therefore, a surge protector should be installed at the entrance of the building. The single MCG surge protector, installed at the entrance to the building, will protect electrical equipment throughout the building from these external surges. MCGs electric surge protector has different models. How to choose the correct model of the surge protector is basically three points for reference: 1. Depending on the size of the transformer, the larger the KVA of the transformer is, the larger the current will