1、 What is a surge？
Answer：Surge is a transient overvoltage that exceeds the normal operating voltage.
2、 What is a surge protector?
Answer：A surge protector is an electron that can turn off the shunt in a very short period of time when the peak or current in the electrical circuit or communication line suddenly generates a peak current due to external interference, thereby avoiding damage to other equipment in the loop. Device.
3、What is the difference between a switch type surge protector and a voltage limiting surge protector?
Answer：The switch type surge protector is a gap discharge type device, and its lightning energy discharge capability is large. The main function used on the line is to discharge lightning energy; the voltage limiting surge protector is a zinc oxide varistor device, and its lightning energy The ability to discharge is small, but its overvoltage suppression capability is good. The main use on the line is to limit overvoltage. Because of this, switch-type surge protection such as the Asafe series is generally used at the entrance of the building to discharge the lightning energy. Then, in the latter stage, a limiting voltage surge protector such as the AM series is used to limit the lightning energy due to the front stage. After the diarrhea, the high overvoltage generated in the rear line. Two surge protectors need to be used together to ensure the safety of the equipment in the distribution line.
4、How to choose the miniature circuit breaker that matches the surge protector?
Answer：G20MT switch module is open circuit, so it is not necessary to install miniature circuit breaker; the first module, such as G2040MT, needs to select 63A D-type miniature circuit breaker with 10KA breaking current capability; second-level module, such as G2020MT It is necessary to select 32A C and D type miniature circuit breakers with breaking current capability of 6.5KA. Because of the different IN values of the working curve, it is recommended to use D type; the third level module, such as G2010MT, needs to use 16A breaking current capability. For the 4.5KA C and D type miniature circuit breakers, the value of the IN of the working curve is different, so the D type is recommended.
5、Are all surge protectors installed with fuses in front of them?
Answer：No. Since the switch type module is open circuited, it is not necessary to install a fuse device such as a miniature circuit breaker.
Surge protector access mode
In the TN system, in general, the surge protector only needs to be connected in common mode, that is, between the neutral line and the protective ground line.
However, in the starting position of the TN-S system, there is no need to access the surge protector between the neutral line and the protective ground line. Only for the power port of the special equipment on the third level of the third, fourth and B lightning protection grades of the A-level lightning protection level, the differential mode access is required, that is, the connection is added to the phase line and the middle Surge protector between sex lines.
In the starting position of the TN-S system, there is no need to access the surge protector between the neutral line and the protective ground line. Only for the power port of the special equipment on the third level of the third, fourth And B lightning protection grades of the A-level lightning protection level, the differential mode access is required, that is, the connection is added to the phase line and the middle Surge protector between sex lines.
In the IT system, the surge protector is only used for common mode connection.
Surge protector, also known as lightning protection device, is an electronic device that provides security protection for various electronic devices, instruments, and communication lines.
The standard surge protector delivers current from the electrical outlet to multiple electrical and electronic devices plugged into the power strip. If a surge or spike is generated and the voltage exceeds an acceptable level, the surge protector can conduct shunting in a very short period of time, thereby avoiding damage to other equipment in the loop.Depending on the selected surge protector and the expected environmental impact, the protective measures required to protect the system's power supply and equipment are divided into three levels.
Class B surge protector: nominal discharge current In, impulse voltage 1.2/50 μs impulse voltage and maximum inrush current Iimp, Iimp waveform is 10/350 μsUp maximum 4kv (IEC61643-1; IEC 60664-1)
Class C surge protector: nominal discharge current In, impulse voltage 1.2/50 μs impulse voltage and maximum inrush current Iimp test, Iimp waveform is 8/25ms
Class D surge protector: test for hybrid wave bonding (open circuit voltage 1.2/50 μs impulse voltage, Denglu current 8/25 μs)
The safety of the surge protector is directly related to the safety of the equipment. Therefore, the selection of the surge protector can be referred to:
Clamping Voltage - This represents the voltage value that will cause the MOV to turn on the ground. The lower the clamp voltage, the better the protection performance. This UL nominal value has three levels of protection - 330 volts, 400 volts, and 500 volts. Typically, a clamp voltage of more than 400 volts is too high.
Energy Absorption/Dissipation Capability - This nominal value indicates how much energy the surge protector can absorb before it is burned, in joules. The higher the value, the better the protection performance. The nominal value of the protector you purchase must be at least between 200 and 400 joules. For better protection, look for products with a nominal value above 600 joules.
Response Time - Surge protectors do not disconnect immediately; they respond slightly to power surges. The longer the response time, the longer the duration that the computer (or other device) will experience a surge. Please purchase a surge protector with a response time of less than one nanosecond.
In addition, you should also purchase a protector with an indicator light to determine if the protective element is functioning. After a number of surges, all MOVs will burn out, but the protector will still work as a power strip. Without the power indicator, it is impossible to know if the protector is still working properly.