Wind Power DC Surge Protective Device (DC SPD)

This wind power DC surge protective device protects wind turbine DC buses in the nacelle, pitch and yaw systems, and converter cabinets.
Designed for wind farm DC surge protection, it uses parallel installation to shunt lightning-induced and switching surges without interrupting operation.
The pluggable DIN-rail module supports fast maintenance, with an optional remote signaling contact for SCADA/BMS.

Key Features for Wind Turbine DC Systems

Purpose-built wind turbine DC surge protector for nacelle, pitch/yaw drives, and converter DC cabinets.
Parallel connection; fast response <25 ns and low residual voltage to protect sensitive electronics.
Pluggable module on 35 mm DIN-rail for quick replacement and minimal downtime.
Dual protection circuit (hot-melt + over-current); clear status window (green = normal / red = replace).
Rugged construction for wind farm environments: −40 °C ~ +80 °C, enclosure IP20.
Optional remote signaling for integration with wind SCADA/BMS.

Main Technical Parameters — Wind Power DC SPD Series

Model	Rate Operating Voltage Un (VDC)	Max Continuous Voltage Uc (VDC)	Operation Voltage (VDC)	Nominal Discharge Current In (8/20 μs)	Max Discharge Current Imax (8/20 μs)	Voltage Protection Level Up (V)	Response Time (ns)	Operating Environment	Cross Section of L/N (mm²)	Protection Class	Outline Size (mm)
C40-660	660	690	1100	20 kA	40 kA	~ 2.3 kV	<25	−40 °C ~ +80 °C	≥10	IP20	54 × 66 × 90
C40-690	690	750	1200	20 kA	40 kA	~ 2.5 kV	<25	−40 °C ~ +80 °C	≥10	IP20	54 × 66 × 90
B80-660	660	690	1100	40 kA	80 kA	~ 2.8 kV	<25	−40 °C ~ +80 °C	≥10	IP20	54 × 66 × 90
B80-690	690	750	1200	40 kA	80 kA	~ 3.0 kV	<25	−40 °C ~ +80 °C	≥10	IP20	54 × 66 × 90
B100-660	660	690	1100	60 kA	120 kA	~ 3.3 kV	<25	−40 °C ~ +80 °C	≥10	IP20	81 × 66 × 90
B100-690	690	750	1200	60 kA	120 kA	~ 3.5 kV	<25	−40 °C ~ +80 °C	≥10	IP20	81 × 66 × 90
B150-660	660	690	1100	80 kA	150 kA	~ 3.6 kV	<25	−40 °C ~ +80 °C	≥10	IP20	81 × 66 × 90
B150-690	690	750	1200	80 kA	150 kA	~ 3.8 kV	<25	−40 °C ~ +80 °C	≥10	IP20	81 × 66 × 90

Note: Select by wind turbine bus voltage (Un/Uc) and surge rating (In/Imax). Keep leads short, ensure reliable DC grounding, and coordinate with upstream DC fuse/breaker.

Drawings

Dimension

Wiring Diagram (Parallel)

FAQ

What is a wind power DC surge protective device?

A DC SPD engineered for wind turbine DC buses (nacelle, pitch, yaw, converter cabinets), installed in parallel to shunt lightning and switching surges safely to ground.

Which DC voltage levels are supported?

Options include 500V / 660V / 690V / 1000V DC. Match Un/Uc to the wind turbine bus and verify the required surge ratings (In/Imax).

Does it support remote monitoring?

Yes. An optional dry-contact output can be integrated into wind farm SCADA/BMS for alarms and maintenance planning.

What are the wiring and environmental requirements?

Keep leads short to minimize Up; conductor cross-section ≥10 mm²; enclosure IP20; operating temperature −40 °C ~ +80 °C.

Where is it installed inside the turbine?

Typically on a 35 mm DIN-rail inside the nacelle or converter DC cabinet, coordinated with the upstream DC fuse/breaker for selectivity.

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Wind Power DC Surge Protective Device (DC SPD) | Wind Turbine DC Protection 500V/660V/690V/1000V