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- Surge Protective Device
- AC Contactor
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- DZ518 Motor Starter
- Residual Circuit Breaker
- High Breaking Capacity Circuit Breaker
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- Intelligent Universal Circuit Breakers/Air Circuit Breaker
- Residual Current Breakers Overcurrent
- Residual Current Device
- Fuse
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- Staircase Switch
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- SB1 Control and Signalling ∅ 22 mm(fixing)
- SB2-E Plastic Control and Signalling ∅ 22mm(fixing)
- SB2-B Metal Control and Signalling ∅ 22mm(fixing)
- SAL-B Control stations and enclosures
- SB3 Control and Signalling ∅ 25、30mm(fixing)
- SB4 Metal Control and Signalling ∅ 22mm
- SB5 Plastic Control and Signalling ∅ 22mm
- SAL-D, K Control stations and enclosures
- SB6 Plastic Control and Signalling ∅ 16mm(fixing)
- SB8 Control and Signalling ∅ 22mm(fixing)
- SB9 Control and Signalling ∅ 22mm(fixing)
- SB10 Control and Signalling ∅ 22mm(fixing)
- AD58 signal indicator series φ16、22、25、30mm(fixing)
- BA9s series bulb with integral LED
- AD58 & SM buzzer units
- SM buzzer series
- Limit Switch
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- MG03 Series
- Water-proof Connection Box
- 6 Ways Distribution Boxes A06 Series
- 6 Ways Distribution Boxes B06 Series
- 10 Ways Distribution Boxes A10 Series
- 11 Ways Distribution Boxes B11 Series
- 14 Ways Distribution Boxes B14 Series
- 12 Ways Distribution Boxes A12 Series
- 24 Ways Distribution Boxes A24 Series
- Control stations and enclosure
- Plug & Socket
- Sensor
- Transformer & Meter
- Relay
- Others
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These devices are applicable to arrest high energy current impulses (10/350 μ s waveform) which can appear in one- or three-phase overhead lines by lightning. These arresters have compact (block type) mounting form. The type 1 surge protective device must be installed into the main distribution box of the building right after the first main current limitation device and before the power meter.
| Howo Code | Number of Poles | W (mm) | Lightning impulse current (10/350 μ s) limp / pole | Total lightning impulse current (10/350 μ s) limptotal | Color | Type |
| WZU4-G25/1P-300V | 1P | 18 | 25kA | 50kA | black | compact |
| WZU4-G25/2P-300V | 2P | 36 | 25kA | 50kA | black | compact |
| WZU4-G25/3P-300V | 3P | 54 | 25kA | 50kA | black | compact |
| WZU4-G25/3P+NPE-300V | 3P+NPE | 72 | 25kA | 50kA | black | compact |
| WZU4-G25/4P-300V | 4P | 72 | 25kA | 50kA | black | compact |
| Howo Code | WZU4-G25-1P | WZU4-G25-2P | WZU4-G25-3P | WZU4-G25-4P |
| Main voltage | 230V, 50Hz/60Hz | 230/400V, 50Hz/60Hz | ||
| Network system | TN, TT | TN, IT | TN, TT | TN, IT |
| Highest continuous voltage (Uc) | 300V AC | |||
| Nominal discharge current (ln 8/20 μ s), (L-N) | 50kA | |||
| Nominal discharge current (ln 8/20 μ s), (N-PE) | 50kA | |||
| Protection level (Up) | 0,9/1,5kV | |||
| Follow current extinguishing capability | 25kA | |||
| Follow current limitation | 125A gG | |||
| Ambient temperature | -40℃ ~ +55℃ | |||
| Terminal capacity | solid: 2,5-35 mm² / flexible: 2,5-25mm² | |||
| Type of terminal | elevator clamp | |||
| Integrated protection devices | spark gap, Varistor, thermal fuse | |||
| Mounting | on 7.5×35 mm size mounting rail (EN50022) | |||
| Arresting signal | Red optical signal | |||
| Auxiliary status contact | Integrated (1 pc NO contact) | |||
| Flammability of housing | UL94-V0 | |||
