AC Circuit protectors
Surge arrester 4P AC 20kA 3F Noark
Manufacturer: Noark Electric
INDEX: 103357
This line of surge arresters is made up of class 2 devices. They are designed to protect against overvoltages caused by transient, fast switching operations or indirect lightning strikes.
It is recommended to install the devices at every 10–20 m of cable length, in main boards and switching substations. Ex9UE2 20 440 devices are designed to coordinate with class 1 of the Ex9UE1 35 line, in the case of Ex9UE2 20 275, the coordination with Ex9UE1 35 is done with a 10 m cable.
The design of Ex9UE2 arresters is based on varistor elements. It provides a low response time. The modular design with replaceable inserts allows for quick and easy replacement of functional modules in case of burnout, due to the frequent occurrence of surge peaks.
Distinguishing features of the product:
Type 2 (Class II, T2, C)
Tested according to 61643-11
Continuous operating voltage (Uc) from 275 to 440 V AC
1+0, 1+1, 2+0, 3+0, 3+1 and 4+0 connection versions
Replaceable varistor insert
Available with and without auxiliary contact
Optical indicator of the varistor insert state
| AC protection type: | AC surge arrester |
|---|---|
| Max. current [A]: | 20000 |
| Feed-in phases: | 3 |
| Width - number of modules: | 4 |
|---|---|
| Dimensions WxHxD [mm]: | 70 x 89.1 x 67.5 |