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Grounding Methods for High- and Low-Voltage Complete Sets of Equipment—Erzheng Electric Tells You
Release time:
2025-12-16
Today, the editor from Erzheng Electric would like to share with you the grounding methods for high- and low-voltage switchgear. Let’s take a look together!
Today, the editor from Erzheng Electric would like to share with you the grounding methods for high- and low-voltage switchgear. Let’s take a look together:
1. The cabinet shall be equipped with a grounding copper busbar with a cross-section of no less than 50×5, and provided with copper busbar connection plates between cabinets.
2. To ensure the safety of repair operations, the main circuit should be capable of being grounded.
3. The enclosure shall be capable of being grounded. All metal parts that are not part of the main circuit or auxiliary circuits but require grounding must be grounded. The enclosure, framework, and other components shall be securely fastened to ensure electrical continuity.
4. The grounding of panels and cabinets shall be firm and reliable. The doors of panels and cabinets equipped with electrical appliances shall be reliably connected to the grounded metal framework by flexible conductors.
5. Disconnect switches and grounding switches shall be equipped with indicators showing their open and closed positions, as well as convenient indicators for inspection purposes. In high- and low-voltage switchgear assemblies, disconnect switches and grounding switches shall not be subject to unintended opening or closing due to forces that may occur during operation.
6. The switchgear shall be divided into several compartments, with compartment divisions designed to meet both normal operating conditions and to effectively limit arc-flash effects within each compartment. Partition plates between different functional units must be made of galvanized steel. Isolating switches and earthing switches shall be equipped with reliable and easily observable indicating devices that clearly show their open and closed positions. Isolating switches and earthing switches must not be prone to accidental opening or closing due to forces that may arise during operation.
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