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Home❯Products❯Medium Voltage Distribution❯Overhead Line Apparatus

Capacitive Power Take-off Type Primary-Secondary Fusion Pole-Mounted CB

The Capacitive Power Take-off Type Primary-Secondary Fusion Pole-Mounted Circuit Breaker deeply integrates key technologies including high-voltage capacitive power take-off (optional), line loss data acquisition, electronic current/voltage sensors, and ultra-low power consumption. Combined with fast fault detection algorithms for short circuit, ground fault, and broken conductor, it enables intelligent sensing and rapid fault clearing for overhead distribution lines. It helps customers achieve the goals of containing branch line faults, preventing customer-side faults from affecting the grid, and enabling automatic isolation of trunk line faults, thereby enhancing power grid safety and reliability.

Specifications

Specifications Product Image
Rated short-circuit current breaking operations: ≥30 times
Mechanical life (circuit breaker / disconnector): ≥10,000 / 3,000 operations
Rated voltage: 12kV
Rated current: 630A
Rated short-circuit breaking current (rms): 20kA
Power frequency withstand voltage (1min) (rms), phase-to-phase and phase-to-ground / open contact: 42 / 48kV
Partial discharge of complete unit (at 14.4kV): ≤5pC
Lightning impulse withstand voltage (peak), phase-to-phase and phase-to-ground / open contact: 75 / 85kV
Rated frequency: 50Hz
Individual module power consumption: 4W / 8W
Auxiliary power take-off voltage: DC/AC 24V
Rated short-time withstand current (4s): 20kA
Rated short-circuit making current (peak): 50kA
Secondary circuit 1min power frequency withstand voltage: 2kV
Rated peak withstand current: 50kA

Features

Supports combination with a disconnector to form a "combined circuit breaker" with visible break
Provides interlock function that blocks circuit breaker handle closing when the isolating blade is not fully engaged
Adopts CVT principle for voltage sensor with secondary electrical isolation; withstands 2kV/1min power frequency voltage on secondary side
Integrates current/voltage sensors and power take-off source to improve safety and simplify installation; allows customization per user requirements; includes independent zero-sequence voltage and current transformers
Avoids issues such as magnetic saturation of electromagnetic transformers and voltage resonance; ensures wide measurement range and high accuracy
Adopts APG integrated casting process for embedded poles and composite insulation (epoxy resin with outer silicone rubber), ensuring reliable performance and excellent weather resistance
Eliminates problems of electromagnetic CT secondary open circuit and PT secondary short circuit; outputs low-voltage signal on secondary side for higher safety and reliability

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