RHP-SCD Voltage Limiting Device

When impermissible touch voltage is developed, the RHP-SCD limits it to very low safe values by efficiently short-circuiting the negative rail and the earth. The programmable automatic opening of the RHP-SCD limits the effects of stray currents. In case of insulation faults (e.g., accidental short-circuits with the contact lines), the RHP-SCD generates a durable conductive path between the overloaded area and the substation and is able to carry the traction fault current until the fault is cleared by the traction high-speed circuit breaker. Embedded state-of-the-art protection technology against lightning and transient overvoltage guarantees optimum equipment protection.

• Fast response time
• Efficient elimination of dangerous overvoltage to very low safe voltage values
• Guaranteed reversibility for long-term currents and high short-circuit currents
• Low residual voltage ensured by Strikesorb surge protection technology
• Combined protection for personnel, passengers, and equipment
• Bidirectional operation
• Redundant triggering via electronic cards and PLC
• Control & monitoring functions
• Alarm & status remote signaling