GN19-12/630 High Voltage Isolation Switch Indoor AC Rated Voltage 12kV Current 630A

Description :

  GN19-12/630 high-voltage isolation switch is a key electrical equipment used in high-voltage distribution systems. Its main function is to disconnect or connect circuits in the absence of load current, providing clear disconnection points to ensure the safety of maintenance personnel. This device is suitable for indoor AC power systems with a rated voltage of 12kV and a rated current of 630A. It is often installed in switchgear as a power isolation component. It has a compact structural design, easy operation, and can be used in conjunction with circuit breakers to achieve circuit control and protection. It is an indispensable basic component in places such as power substations and industrial and mining enterprise distribution rooms.

  The GN19-12/630 high-voltage isolation switch adopts a copper conductive circuit with low contact resistance and low temperature rise, ensuring long-term operational stability. The insulation part is usually made of high-quality epoxy resin or ceramic materials, which have excellent dielectric strength and pollution resistance, and comply with the GB1985 "AC High Voltage Isolation Switches and Grounding Switches" standard. The mechanical lifespan of the equipment can reach over 2000 cycles, and the electrical lifespan meets the requirements for frequent operation. The overall structure includes a base, supporting insulators, conductive switches, and operating mechanisms. The size is moderate, making it easy to install and layout in a standard switchgear, and it has passed strict factory withstand voltage tests and mechanical characteristic tests.

  When selecting, it is necessary to specify that the usage environment is indoor. If it is used outdoors, the corresponding protection level model such as GW series should be selected. GN19-12/630 is suitable for systems with a rated frequency of 50Hz and a voltage of 12kV, and is not suitable for frequent load operation or scenarios where short-circuit currents are cut off, which require a circuit breaker to complete. Compared with other current specifications in the same series, the 630A version is suitable for medium load distribution lines. If the load current is larger, 1250A or higher specifications should be selected. During installation, attention should be paid to ensuring that the phase to phase distance and ground distance comply with safety regulations. The operating mechanism should be flexible and reliable to avoid jamming and affecting the accuracy of opening and closing.

  Before installing GN19-12/630 high-voltage isolation switch, it is necessary to check whether the insulator has cracks and whether the conductive contact surface is clean and flat. During daily maintenance, dust should be regularly cleaned, fasteners should be checked for looseness, and an appropriate amount of lubricating grease should be applied to rotating parts to maintain operational flexibility. Common faults include contact overheating, insulator flashover, etc. Infrared temperature measurement can be used to monitor the contact temperature. If any abnormalities are found, power should be cut off in a timely manner. It is recommended to conduct a preventive test every six months to measure contact resistance and insulation resistance, ensuring that the equipment is in good condition, extending its service life, and ensuring the safe and stable operation of the power system.

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