GN19-12 series indoor high voltage isolating switch

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1. Overview
-Type series indoor high-voltage isolating switch and high-voltage switchgear, used in power systems with rated voltages of kilovolts, AC and below, equipped with a manual operating mechanism. It is used for opening and closing circuits when there is voltage but no load. There are also derivative products such as anti-fouling type, plateau type and equipped with live display devices. This product has a compact design, small space occupation, strong insulation capability, and is easy to install and adjust. Its performance complies with the requirements of "AC High Voltage Isolating Switches and Grounding Switches" and can be used in conjunction with high-voltage switch cabinets or alone.
2. Environmental conditions
. The upper limit of ambient air temperature is +℃ and the lower limit is -℃
b. The altitude does not exceed.
The daily average relative humidity is not greater than, the monthly average is not greater than the water vapor pressure, the daily average is not greater than. The monthly average is not greater than.
. The surrounding air should not be significantly contaminated by corrosive or flammable gases, water vapor, etc.
. No frequent violent vibrations.
3. Structure and working principle
The conductive part of each phase of the - type isolating switch is fixed on the base through two pillar insulators. (-,, and type, one is a pillar insulator and the other is a porcelain bushing insulator) The three phases are installed in parallel, and the conductive part consists of a contact blade static contact and a contact base (or conductive rod). A tie rod insulator is connected in the middle of each phase contact knife, and the tie rod insulator is connected to the main shaft installed on the base. The spindle is connected to the connecting rod (prepared by the user) and the dynamic mechanism through the handle
The contact knife is composed of two grooved copper plates, which not only increases the heat dissipation area of the contact knife and is beneficial to lowering the temperature, but also Moreover, the mechanical strength of the contact knife is improved, and the dynamic stability of the switch is improved. One end of the contact blade is installed on the contact base (or conductive rod) through bolts. The other end is detachably connected to the static contact, and the contact pressure of the contact blade is maintained by the springs at both ends. -/. A magnetic locking plate is installed at the contact point. The purpose of adding the magnetic locking plate is to enhance the attraction between the two groove-shaped contact blades when a large short-circuit current passes through. That is to say, the contact pressure at the contact point is increased, thereby improving the dynamic and thermal stability of the switch. -/,3 The limit flow of the isolating switch is small, so there is no need to add a magnetic lock plate.