GN27-40.5 Indoor High-Voltage Disconnecting Switch

  • Strong Applicability:Rated voltage of 40.5kV, suitable for 50Hz AC power systems.
  • High Reliability:Enhanced insulation design and excellent self-cleaning capability ensure stable long-term performance.
  • High Performance:Low operating torque, high wear resistance, and excellent heat dissipation.
  • Flexible Installation:Can be installed horizontally, vertically, or at an inclined angle to meet various needs.
  • Excellent Design:Rotary contacts with grounding knife design, improving contact pressure and mechanical strength.
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Describe Display

GN27-40.5 Indoor High Voltage Disconnector is a new generation product designed to replace legacy equipment. It is suitable for rated voltage 40.5kV, 50Hz AC power systems to make or break circuits under voltage without load conditions. This disconnector can be used in conjunction with high voltage switchgear cabinets or independently, equipped with CS6-2 operating mechanism. Featuring reinforced insulation design, it meets operational requirements for Class II pollution environments.

 

The design is scientific, rational, and structurally innovative. It features multiple contacts with a rotary contact mechanism, providing excellent self-cleaning capability and enhanced heat dissipation. The contact points operate within two planes, ensuring low operating torque, high pressure resistance, and ease of adjustment. With optimized creepage distance, reinforced insulation capability, and voltage withstand performance that meet the highest requirements, bearings are integrated into the rotating shaft to extend service life and ensure smooth, lightweight operation.

 

This series adopts vertically rotating blade-type three-phase common base structure. The stationary contact on disconnector side features swinging multi-contact plate design offering advantages of low single-contact pressure, minimized wear, large heat dissipation area, and reduced operating torque. Utilizing long creepage distance pillar insulators and link rod insulators ensures high insulation performance and mechanical strength. Available configurations include flush-mounted type, wall-through type, and versions with grounding blades to meet various requirements. The disconnector can be installed horizontally, vertically, or at inclined angles.

Product parameters
Type GN27-40.5/630-20 GN27-40.5/1250-31.5
Rated Voltage 40.5kV
Rated Current 630A 1250A
Rated Short-Time Withstand Current (RMS/Time) 20kV/4s 31.5kV/4s
Rated Peak Withstand Current 50kA 80kA
Lightning Impulse/Withstand Voltage (Relative Low) 185kV
Lightning Impulse/Withstand Voltage (Across Break) 215kV
1min Power Frequency/Withstand Voltage (Phase-to-Ground&Phase-to-Phase) 95kV
1min Power Frequency/Withstand Voltage (Break) 115kV
Size/Installation
Model A B C
GN27-40.5/630-20 543 781 940
GN27-40.5/1250-31.5 544 788 950
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