Surge Protection for Wind Turbine

Wind turbines, often located in exposed areas for optimal wind capture, are highly vulnerable to lightning strikes and transient over - voltages. Their sensitive electronics, including control systems, transformers, and frequency converters, are at risk of damage from these electrical surges. This is where surge protection for wind turbines becomes crucial.

Properly installed surge protective devices (SPDs) can significantly minimize the potential impact of lightning events. They work by diverting excess voltage and current away from the delicate components, safeguarding them from harm. SPDs are designed to meet strict international standards, ensuring full compliance and reliable protection.

When choosing SPDs for wind turbines, factors like the type of electrical system (TN - S, TT, or IT) and the installation location must be carefully considered. Different parts of the wind turbine, such as the blades and control cabinets, require specific types of SPDs based on their exposure levels. With the right surge protection in place, wind turbines can operate more steadily, reducing downtime and maintenance costs, and maximizing energy production.

SPD Protection Selection

Power system	Location	To be protected	Surge Protector Model
Generator lines 690Vac	B	The stator of generator	EP1-12.5/3P series
	A	The rotor winding of generator	EP1-12.5/3PT series
	D,E,G	Main power service	EP1-12.5/3P series
	C	Converter	EP1-12.5/3PT series
	F	The low voltage side of the transformer	EP1-25VT/3PI series

Power system	Location	To be protected	Surge Protector Model
Power supply 277/480Vac	L,K	Pinch-control cabinet	SP series
	J	The aircraft warning light	SP series
	I	Nacelle Control cabinet	SP series
	N,M	Yaw-control cabinet	SP series
	O	Tower-base Control cabinet	SP series

Power system

Location

To be protected

Surge Protector Model

DC power supply

24,48V

T

Anemometer

SPV series

...

Other DC equipment

SPV series

Power system	Location	To be protected	Surge Protector Model
Ethernet communication	R, ...	Ethernet network	RJ45 1G Series
Measuring and control equipment	Q,S,T,U,V,W,X,...	Sensors, measuring and control equipment,Bus system	DM series

UL1449 In 20kA compact size TPMOV-20PTMOV

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