JN15-24 earthing switch
JN15-24/31.5 indoor AC high voltage earthing switch is an advanced level product with high-tech parameters performance.After comprehensive evaluation,it conforms to GB1985 and IEC62271 standard ,applies to power system of 24kV and three-phase AC 50Hz.It owns short-circuit making capacity to protect other electric equipment not being damaged.Can be used with various high voltage switchgear,also play a protective role in the high-voltage electrical equipment overhaul.
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grounding switches use resin insulators, on which live parts, made of silver-plated electrolytic copper (99.9%), are placed. The blades are directly connected to the drive shaft. Contact elements are overdimensioned according to the requirements in order to guarantee, together with a high contact pressure between blades and contacts, a reduced ohmic resistance at the contact surface and a minimum metal wear-off during the life of the grounding switch, with the necessary robustness to withstand thermal and mechanical stresses under short-circuit conditions.
Item Unit Data Rated voltage kV 24 Rated short-time withstand current kA 31.5 Rated short-circuit duration s 4 Rated short-circuit making current kA 80 Rated peak withstand current kA 80 Rated insulation level PF withstand voltage (1 min) kV Phase to earthPhase to phase 65 Lightning impulse withstand voltage 125 Mechanical endurance Time 2000 Drawing:
