Nowadays, no one can imagine life without electricity at home. This is a huge convenience and a civilization invention, but improperly performed installation also poses a real threat. What are surge voltages and what danger do they pose? What is the difference between t1 and t2 surge arresters and how to choose the right variant?
Check out surge arresters at the Onninen electrical wholesaler
What effects can a surge cause?
Not everyone knows that overvoltage is a phenomenon that can occur quite often. By default, the electrical voltage in every house or apartment should be 230 V. However, it sometimes happens that it may be much higher. A characteristic feature of an overvoltage is that the increase in voltage is significant and short-lived. Most often, this condition is caused by a fault, earth fault, switching in the circuit or other factors. In such situations, it is said that internal overvoltages have occurred, and the so-called external overvoltages of electrical equipment , e.g. as a consequence of lightning discharges.
Regardless of the source of the overvoltage, it always poses a real threat to equipment connected to the network. Even though they have insulation protection, overvoltage can still be destructive to the equipment. It is therefore necessary to provide appropriate security measures on the home side of the installation. Power surges are most dangerous for home equipment, which may be destroyed.
What is the difference between surge arresters t1 and t2?
To protect equipment and electrical installations against overvoltages, appropriate protection measures should be used - surge arresters . In practice, two types of limiters are used. The first of them - spark gap - are designed to cut off the voltage. The operating mechanism allows too high voltage to be discharged to ground. The second type are varistor limiters, whose task is to limit the voltage level. These devices are characterized by a lower ability to discharge electric charge.
Depending on the location of the limiters, there are as many as three levels of surge protection. Basic protection is provided by type 1 surge arresters . They are located directly at the entrance of the electrical installation to the facility. The mechanism of action consists in cutting off the overvoltage impulse and discharging it to ground. The second protection are type 2 surge arresters , whose task is to protect devices and equipment located inside the building.
How to choose the right t1 + t2 surge arrester?
Surge arresters t1+t2 provide basic protection, but for it to be effective, individual devices must be properly matched. Before purchasing a device, you should first consider the risks. The basic selection criterion is the type of network, e.g. TN-S, TNC, and the appropriate configuration, number and parameters of modules must always be taken into account.
Type1 and type2 arresters are a solution dedicated to protection against partial lightning currents and induced overvoltages. This device, installed in the main switchboard, allows you to protect facilities equipped with LPS classes IV and III and powered by overhead lines.
In type 2 arresters, devices are protected only against induced voltage. Unlike the t1+t2 solution, the type 2 arrester itself is installed in local switchboards. They can be installed in any facilities as a second level of security.
Surge arresters t1 + t2 in the Onninen wholesaler
The Onninen electrical wholesaler 's offer includes a wide range of security products, as well as specialized modular equipment and electrical equipment. Thanks to a wide range, you can find everything you need in one place.
Devices such as the t1 and t2 surge arrester ETI PV ETITEC EM T12 PV 1100/6.25Y are a modular solution characterized by excellent quality and durability. It allows for real protection against surges. It is mounted on a DIN TH-35 mounting rail and has appropriate certificates and approvals.
Another noteworthy variant is the type 1+2 EATON 600 VDC SPPVT12-06-2+PE surge arrester , characterized by an exceptionally high level of protection. This makes it perfect for protecting photovoltaic installations, as well as any systems powered by direct current.
Check out surge arresters at the Onninen electrical wholesaler