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The combined devices are applicable to arrest high energy current impulses (10/350μs waveform) which can appear in one- or three-phase overhead lines by lightning and/or discharge overvoltage occurred by switch-type (8/20μs wave-form) over-currents. These arresters have compact (block type) mounting form. The type 1 + 2 lightning arresters must be installed into the main distribution box of the building right after the first main current limitation device and before the power meter.
Attention! The discharge capability of combined devices cannot reach the discharge capability of single devices!
These devices can also be used in properly planned photovoltaic (DC) systems as well.
Attention! The discharge capability of combined devices cannot reach the discharge capability of single devices!
These devices can also be used in properly planned photovoltaic (DC) systems as well.
| Howo code |
Number of poles |
W (mm) |
Lightning impulse current (10/350μs) Iimp / pole |
Maximal discharge current (8/20μs) Imax |
Color | Type |
| WZU4-80/T1+2/1P-385V | 1 | 27 | 8kA | 80kA | grey | compact |
| WZU4-80/T1+2/2P-385V | 2 | 54 | 8kA | 80kA | grey | compact |
| WZU4-80/T1+2/3P-385V | 3 | 81 | 8kA | 80kA | grey | compact |
| WZU4-80/T1+2/4P-385V | 4 | 108 | 8kA | 80kA | grey | compact |
| WZU4-80/T1+2/3P+NPE-385V | 3P+N/PE | 108 | 8kA | 80kA | grey | compact |
| Howo code | WZU4-80T |
| Main voltage | 230/400V, 50Hz |
| Network system | TN, TT, IT |
| Highest continuous voltage (Uc) | 320V |
| Network system | 320V AC, 420V DC |
| Nominal discharge current (In 8/20μs) | 40kA |
| Protection level (Up) | 2,2kV |
| NPE lightning impulse discharge current (10/350μs) | 8kA |
| Follow current limitation | 125A gG |
| Follow current extinguishing capability | -40 ℃ ... +55 ℃ |
| Ambient temperature | elevator clamp |
| Type of terminal | Varistor, thermal fuse |
| Integrated protection devices | on 7.5x35 mm size mounting rail (EN 50022) |
| Mounting | Integrated (1 pc CO contact) |
| Auxiliary status contact | Red optical signal |
| Arresting signal | solid: 6-35 mm² |
| Terminal capacity | flexible: 6-25 mm² |
| Flammability of housing | UL94-V0 |
