VLD class 1, type VLD-F.

• The VLD is used to restrict excessive high contact voltages arising on exposed conductive parts of a railway equipment in case of a disturbance (short-circuit) in AC and DC railway electric traction systems, thus ensuring protection to persons that may come into contact with the parts mentioned.
• In the event of a failure connection between a live power supply part of the traction system and an exposed conductive part (e.g. due to the overhead power line fall) the VLD protects the parts affected by causing conductive itself, which results in turning off of the power supply.
• The SCG is connected between the protected part and the return circuit.
• In case of an overload caused by caused by short-circuit or long-term withstand current the internal patented (PV CZ2017248) short-circuiting device intervenes by establishing a permanent short circuit across the protective element.
• The integrated protective element effectively eliminates high impulse overvoltage induced into the traction mains or railway equipment by a lightning strike.
• Easy mounting, installation right away on the protected equipment.