DEHNguard® protects wind turbines

Type 2 arrester for voltages up to 1000 V

Combines two contrast: High system voltage and low voltage protection level

The undesired tripping of a surge protective device (SPD) in case of voltage peaks up to 2,200 V_peak used to be a problem especially in wind turbines.

DEHNguard^® DG SE H 1000 VA comprises a varistor connected in series with a gas discharge tube which prevents undesired tripping of the SPD. This type 2 arrester is therefore ideally suited for use in wind turbines – particularly for protecting double fed induction (DFI) generators.

More space on the DIN rail – Width of only 4.5 standard DIN modules

Compared to the previous solution which required 8 standard DIN modules, compact surge protection including protection of terminal equipment is now ensured on 4.5 standard DIN modules.

 
^{Previous solution: “Neptune circuit” (8 standard DIN modules) - New solution with DG SE H 1000 VA (4.5 standard DIN modules)}

Your benefits at a glance

• Excellent protection thanks to low voltage protection level (≤ 5 kV)
• Universal use: The series connection of a varistor and a gas discharge tube prevents tripping up to 2,200 V_peak
• Space-saving installation (4.5 standard DIN modules = 81 mm instead of 8 standard DIN modules)
• Long service life thanks to high discharge capacity up to 40 kA (8/20 µs) and absence of leakage currents
• Vibration and shock-proof thanks to module locking system
• Easy function monitoring by means of visual indication and remote signalling contact

Further fields of application