Voltage protection is an important electrical protection method that aims to ensure that equipment in the power system can operate safely when the voltage is abnormal.
When the voltage in the power system is too high or too low, exceeding the range that the equipment can withstand, the voltage protection will trigger the protection mechanism and start.
Overvoltage protection is used to prevent damage to equipment caused by excessive voltage, such as lightning overvoltage, operating overvoltage, etc. These overvoltages may be caused by lightning strikes, switch operations, etc.
Undervoltage protection is used to prevent equipment overload and damage caused by low voltage. For example, when the power supply voltage is reduced or interrupted, low voltage protection can ensure that the equipment will not be damaged due to insufficient voltage.
There are many kinds of voltage protection. In fact, the lightning arresters, varistors, fuses and other devices we use in daily life are all used to limit overvoltage, and voltage relays, time relays, etc. are used to achieve low voltage protection. These devices or systems can monitor the voltage level and quickly cut off the circuit or trigger an alarm when the voltage is abnormal, thereby protecting the equipment from damage.
Voltage protection is widely used, covering many fields such as industry, agriculture, construction, and transportation. In industrial production, voltage protection can ensure the stable operation of motors, inverters and other equipment on the production line; in the agricultural field, it helps to protect irrigation systems, agricultural machinery and other equipment; in the construction and transportation fields, voltage protection also plays a vital role.
Voltage protection is a key measure to ensure the stable operation of the power system and the safety of equipment. Through reasonable voltage protection measures, the risk of equipment damage can be effectively reduced and the reliability and safety of the power system can be improved.
In spite of the high lightning risk that many PV installations are exposed to, they can be protected by the application of DC SPDs and a properly engineered lightning protection system. Effective DC SPD implementation should include the following considerations: •Correct placement in the system •Termination requirements •Proper grounding and bonding of the equipment-ground system […]
In an electrical systems, SPDs are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of SPD can be similar to that of a circuit breaker. In normal use (no overvoltage): the SPD is similar to an open circuit breaker. When there is an overvoltage: the SPD […]
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