On-site installation of high-voltage switchgear
Aug 24, 2021
The high-voltage switchgear can be installed on site:
After the high-voltage switchgear is delivered to the site, it is usually installed by the user or the installation unit.
The installation content mainly includes: the cabinet body is in place and the cabinet, the connection between the main bus and the lower bus, the cable head production and the upper position, the secondary cable lead connection and the secondary terminal row connection, etc.
The precautions during the construction process are as follows:
1. The high-voltage switchgear should not be subject to collisions to avoid deformation of the skeleton, or the thin panel bumps, and the surface coating is bumped, which affects the appearance.
2. The level of channel steel required for the installation of side-by-side cabinets (allowable error per meter ≯ 1mm).
3. The height of the foundation height of the handcart cabinet should be considered for the convenience of handcart access, and no steps should be formed on the floor.
4. During transportation and installation, the vacuum interrupter must be protected, especially when installing the main bus on the top of the cabinet, the top of the vacuum switch must be covered with a hard plate to prevent tools and screws from falling and hurting the interrupter.
It must be done when self-provisioning the main bus;
1. The grounding main bus of the high-voltage switchgear should be reliably connected to the pre-buried grounding grid of the installation foundation to ensure continuous reliability of grounding.
2. The secondary lead cables of the cabinet must be laid according to the designated path, and must not hinder the movement of moving parts, or be stepped on during future maintenance and inspection.
3. The bus bar connected with electrical components should be connected reliably at the joints so as not to affect the flow capacity.
4. When the current is large, the joints must be tinned.
5. The conductive contact surface of bare copper and bare copper must be coated with protective agent (conductive paste, petroleum jelly, etc.) to prevent oxidation and moisture.
