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Total Solution to Earthing & Lightning Protection |
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Specific systems protection
Introduction
Protecting wind turbines - Wind turbines contain a vast array of electronic systems,
including power, control and telecoms, which require transient overvoltage protection.
Protection follows the Lightning Protection Zones (LPZ)
concept established in IEC/BS EN 62305 and
IEC 61400, with equipment sited in internal zones up to
LPZ 2 (see Figure 8 & Table 3 for specific locations).
Power line protection
Lightning current/equipotential bonding SPDs (minimum
Type 1) are required at LPZ boundary LPZ 0 to LPZ 1
to counter partial lightning currents resulting from a direct
lightning strike. Transient overvoltage SPDs (minimum Type 2)
are required at LPZ boundary LPZ 1 to LPZ 2 to protect
critical electronic systems.
The SPD selected should be suitable for the voltage of the
line. Furse ESP WT Series protectors apply at 690 V with
Furse ESP D1 Series or Furse ESP M1 Series protectors
covering 230 V/400 V lines (see Table 3).
These power line protectors offer low let-through voltage
protection creating a safe area downstream of minimum LPZ
2, meeting the requirements for wind turbines.