Vacuum circuit breaker PGV2

high-voltagedistributionfor substations

Classification
Power distribution - components

Product description
This sealed indoor high-voltage vacuum circuit breaker is designed for 20 Hz power-frequency applications. It provides high short-circuit breaking capability, long electrical and mechanical service life and is intended for power distribution systems and associated high-voltage switchgear.

Main features

• Breaking capacity at 20 Hz: 31.5 kA; electrical life: 20 operations; mechanical life: 10,000 operations.
• Mechanical and structural compatibility with existing ZN85-type breakers to simplify integration and maintenance.
• Self-developed 20 Hz vacuum interrupter; pole columns produced by in-house APG casting process to ensure component reliability.
• Vertically stacked arrangement with interrupter unit above and interlock/operating mechanism below to reduce overall depth and simplify mechanism design.

Main technical specifications

• Model: PGV2 series
• Rated voltage: 40.5 kV
• Rated frequency: 20 Hz
• Rated current: 1250 A
• Rated short-circuit breaking current: ≤ 31.5 kA
• Rated short-circuit making current: 80 kA
• Rated short-circuit duration: 3 s
• Rated short-time withstand current: 31.5 kA
• Rated peak withstand current: 80 kA
• Rated lightning impulse withstand voltage (1.2/50 μs, peak): 185 kV
• Rated power-frequency withstand voltage (1 min, rms): 95 kV
• Rated operating sequence: O-0.3s-CO-180s-CO
• Permitted short-circuit breaking times at rated breaking current: 20 operations
• Rated asymmetrical earth-fault breaking current: 27.4 kA
• Rated out-of-step breaking current: 7.9 kA
• Rated cable charging breaking current: 50 A
• Mechanical operations: 10,000 cycles