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Series PD-250 HV Relay
The PD-250 series relay delivers high-reliability grid stability. Optimized with hermetic vacuum interrupters, it ensures millisecond arc clearance and robust galvanic isolation for mission-critical substation safety.
Technical Parameter
Insulation
• High-strength alumina ceramic main body
• SF6 pressurized insulation medium for high dielectric strength
• Designed for long-term stability under EHV operating conditions
Rated Voltage
• Rated system voltage: 250 kV AC
• Suitable for extra-high-voltage transmission applications
• Coordinated with typical substation insulation levels
Amperage Cap
• Continuous current rating: 1,200 A
• Short-time withstand: 2,500 A for 3 seconds
• Supports high fault currents without contact damage
Logic Interface
• Fiber optic control interface immune to EMI/RFI
• Supports digital logic and remote trip/close commands
• Ensures galvanic isolation between control and power circuits
Contact Tip
• Vacuum-sintered tungsten–silver contact tips
• Low contact resistance for reduced thermal losses
• High endurance against repeated make/break operations
Interruption Systems
Vacuum Arc Suppression
Advanced vacuum interrupters neutralize ionized paths to safeguard sensitive downstream grid apparatus.
Management Module
Integrated cooling arrays manage thermal profiles effectively during continuous heavy-load power delivery.
Universal Frame
A compliant NEMA footprint facilitates seamless integration into existing global utility busbar frameworks.
Failure Protocol
Redundant mechanical lockout hardware prevents unintended activation during manual maintenance procedures.