AC ring main unit XGN105

medium-voltageSF6 gas-insulatedmetal-clad

Product name
XGN105-40.5 SF6 metal-enclosed ring main unit

Category
Distribution equipment - ring main unit (RMU)

Main features

• High reliability: internal low-pressure SF6 gas provides insulation in a fully sealed high-voltage system, protecting against condensation, pollution and high altitude for largely maintenance-free operation.
• Excellent insulation: low partial discharge level; whole-unit partial discharge ≤20 pC.
• Compact design: breaker cabinet width 500 mm, load switch cabinet width 450 mm, cabinet depth < 1 m, space-saving installation.
• Reliable five-prevention functions: complete mechanical interlock design for safe operation.

Main technical parameters
Rated voltage: 40.5 kV; Rated frequency: 50 Hz; Rated current: 630 A; Rated short-time power-frequency withstand voltage (1 min, rms): 95 kV; Lightning impulse withstand voltage (1.2/50 μs peak): 185 kV; Partial discharge level: ≤20 pC; Rated short-time withstand current (breaker cabinet / load switch cabinet): 31.5 / 25 kA; Rated peak withstand current (breaker cabinet / load switch cabinet): 80 / 63 kA; Rated short-circuit duration: 4 s; SF6 gas pressure (20ºC gauge) rated pressure: 0.04 MPa; Minimum working pressure: 0.02 MPa; Design pressure: 0.08 MPa; SF6 annual leakage rate: ≤0.01%/year; Protection degree: cabinet shell IP4X, gas tank IP67.

Characteristics / specifications (summary)

• Model: XGN105 series
• Rated voltage: 40.5 kV
• Rated frequency: 50 Hz
• Rated current: 630 A
• Partial discharge: ≤20 pC
• Short-time withstand current: 31.5 / 25 kA (breaker / load switch)
• Peak withstand current: 80 / 63 kA (breaker / load switch)
• Short-circuit duration: 4 s
• SF6 rated pressure (20ºC gauge): 0.04 MPa; Minimum working pressure: 0.02 MPa; Design pressure: 0.08 MPa
• SF6 annual leakage rate: ≤0.01%/year
• Protection degree: cabinet shell IP4X, gas tank IP67