What is the difference between arrester and surge protector?

The arrester is used to protect electrical equipment from high transient over-voltage hazards caused by lightning strikes, and limits the free-wheeling time, and often also limits the electrical magnitude of the freewheeling current. Sometimes called overvoltage protector, overvoltage limiter, mainly used in power plants, lines, power distribution stations, power generation, capacitors, motors, transformers, neutral, steel, railways.

The surge protector is an electronic device that provides security protection for various electronic devices, instrumentation, and communication lines. When a sudden current or voltage suddenly occurs in the electrical circuit or communication line due to external interference, the surge protector can conduct the shunt in a very short time, so as to avoid the damage of the surge to other equipment in the circuit. Electricity, cabinets, low-voltage electrical appliances, communications, signals, machine stations, and computer rooms.

The difference between arrester and surge protector

1, the application field can be divided from the voltage level.

The rated voltage of the lightning arrester is 3kV to 1000kV and the low voltage is 0.28kV to 0.5kV.

The surge protector's rated voltage is 1.2kV, 380, 220~10V~5V.

2, different protection objects

The lightning arrester protects the electrical equipment, and the surge protector generally protects the secondary signal circuit or the electronic equipment instrument and other terminal power supply circuits.

3, different insulation levels or pressure levels

The withstand voltage level of electrical equipment and electronic equipment is not one order of magnitude, and the residual voltage of the overvoltage protection device should match the withstand voltage level of the protection object.

4, different installation locations

Arresters are generally installed on a system to prevent the direct intrusion of lightning waves to protect overhead lines and electrical equipment. Surge protection devices are often installed on secondary systems. After surge arresters have eliminated the direct intrusion of lightning waves, or the arrester is not The supplemental measures when the lightning wave is eliminated are clean; so the arrester is installed at the incoming line; and the surge protector is usually installed at the terminal outlet or signal loop.

5, different flow capacity

Arrester because the main role is to prevent lightning overvoltage, so its relatively large flow capacity; and for electronic equipment, the insulation level is much smaller than the general sense of the electrical equipment, it needs surge protectors for lightning overvoltage and operating overvoltage Protect, but its flow capacity is generally not large. (Surge protectors are generally at the end and will not be directly connected to the overhead lines. After the current limiting function of the upper level, the lightning current has been limited to a lower value, so that the surge protector with small flow capacity can completely For protection, the flow value is not important, but the residual pressure is important.)

6. Surge protector is suitable for fine protection of low voltage power supply system.

The surge protector has a large distance from the front surge protector of the terminal device, so that an oscillating overvoltage or other overvoltage is easily generated on the line. The power surge protection applied to the terminal equipment is better when used in conjunction with the surge protector at the front stage.

7, different materials

The main material of the lightning arrester is zinc oxide (a kind of metal oxide varistor), and the main material of the surge protector is different according to the anti-surge rating and the classification protection (IEC61312), and the design is better than ordinary protection. The minecraft is much more precise.

8. Technically speaking, surge arresters do not reach the level of surge protectors in response time, pressure limiting effect, comprehensive protection effect, and anti-aging characteristics.