Weidmuller supply a series of surge protection devices for protecting electrical installations in industrial buildings against damages caused by voltage surges that occur as a result of lightning strikes and inductive circuits.
Only dedicated surge protection devices can provide full protection for electrical and electronic devices, so it is very important to tailor the search protection device to the application.
Surge protection devices for industrial applications should be designed to relate to the protection classes I to III without the use of decoupling modules. The PU I-III family of surge protectors, which are based on varistor technology, are a reliable solution.
Lightning and overvoltage protector type PU I is able to cover the first level of protection (class I or II) in power distribution circuits. It has a high discharge current of 12.5 kA (10/350μs), and thanks to its compact design fits into any subdistributor and switching system.
The core element of these surge protection devices is the high-performance varistor, which is designed as a pluggable component and is thermally triggered on overload in the event of a fault. Following the fault signalling, the pluggable arrester module can be easily replaced.
The PU I surge protector can also be used without decoupling in a protective system with class II and III arresters, allowing users to create a three level protection system fairly simply.