Scope of Application
• DZ47H-125 series isolating switches are primarily used for isolation in AC 50Hz distribution circuits with rated voltage up to 415V and rated current up to 125A. They serve as main switches in terminal combination devices and may also be used for infrequent circuit breaking and making. Widely applied in industrial plants, high-rise buildings, commercial spaces, and residential areas.
• Complies with IEC 60947-3 and GB/T 14048.3-2017 "Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units".
Main Technical Parameters
• Rated voltage (Uₑ):
50Hz, AC220V/230V/240V (1P), AC230V (2P), AC380V/400V/415V (2P/3P/4P)
• Rated operational current (Iₑ):
20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A
• Number of poles: 1P, 2P, 3P, 4P
• Rated short-time withstand current (Iₖ): 1.5kA (RMS), t=1s
• Rated short-circuit making capacity (Iₘ): 2.5kA (peak)
• Rated impulse withstand voltage: 6kV
• Rated insulation voltage: 500V
• Mechanical lifespan: 8,500 operations (300 operations under load)
• Operating frequency: 120 operations/hour
• Utilization category: AC-22A, AC-21B
• Protection class: IP20
Operating and Installation Conditions
• Ambient temperature: -5℃ to +40℃ (24-hour average ≤+35℃)
• Altitude: ≤2000m
• Humidity: ≤50% at +40℃; ≤90% at +20℃ (special measures required for condensation)
• Pollution Degree: 2
• Installation Category: II or III
• Mounting: On 35mm standard rails
• Installation orientation: Vertical (handle upward for ON position)
• Vibration: Installation site must be free of significant shock/vibration
• Duty cycle: Uninterrupted duty cycle