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  • JN17-12-40
  • JN17

JN17-12/40 Indoor AC High Voltage Earth switch

Model: JN17-12/40


JN17-12/40 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 3-12kV 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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    Use epoxy resin insulators, conductive parts made of silver-plated electrolytic copper(99.9%).

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    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.

  • Technical Parameter
  • Drawing
Item Unit Data
Rated voltage kV 12
Rated short-time withstand current kA 40
Rated short-circuit duration s 4
Rated short-circuit making current kA 100
Rated peak withstand current kA 100
Rated insulation level PF withstand voltage(1 min) kV Phase to earth 42
Lightning impulse withstand voltage Phase to phase 75
Mechanical endurance time 2000

JN17-12/40 Indoor AC High Voltage Earth switch specification

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