The ground switch does not need to open the load current and short-circuit current, so there is no arc extinguishing device. The lower end of the gate is usually connected to the grounding point through the current transformer. The current transformer can give signals for relay protection. There are single-pole, double-pole and triple-pole ground switches of various structures. Single pole is used only for neutral grounding system, while double and triple pole are used for neutral ungrounded system and share a common operating mechanism for operation. Function: Normal working grounding when servicing the line. When the circuit breaker is located in the line to be serviced, the circuit breaker is in the branch position, both sides of the isolation switch are open, in the branch state. The ground switch is closed for normal working grounding. To ensure the safety of equipment and maintenance personnel. Cut off the electrostatic, electromagnetic induction current. Ground switch is a mechanical grounding device to release the electrostatic leaning of the equipment and circuit being serviced and to ensure the personal safety of maintenance personnel during power outages.

High-voltage into the cabinet is usually not set up ground switch, maintenance by the upper level of out of the cabinet ground switch grounding and field hanging ground wire to ensure safety. Into the cabinet and the upper level corresponding out of the cabinet is often far away, not easy to rely on the chain to ensure that the incoming cabinet ground switch does not cause a short circuit, not set up ground switch is to prevent a short circuit to the upper level out of the cabinet. Quick ground switch only has the ability to close the short-circuit current, and does not have the ability to open and close the short-circuit current. In the medium-voltage system, in order to prevent misoperation or other reasons, directly to the charged line short-circuit grounded, if there is no certain arc extinguishing ability, will be seriously injured, so the medium-voltage indoor switchgear are installed in the fast ground switch. In the high-voltage field, people and equipment are very far away (are distant operation), the hazard is small, and high-voltage ground switch is difficult to make. Medium-voltage ground switch as long as the closing speed is enough, the basic can close the short-circuit current, so the standard GB3609 requirements to install, and also in the cabinet to close the test. High-voltage, ultra-high-voltage or extra-high-voltage switchgear, especially the ground switch in GIS closing requirements and induction current opening and closing is necessary. In the case of open disconnect switches with grounding knives, if induction currents need to be opened and closed, a device with an arc extinguishing cover is required to do so. These are extreme operating conditions, but the equipment is required to have these capabilities. The ground switch current transformer can give signals for relay protection. Various structural forms of ground switches are available with single, double and triple poles.

The ground switch mainly plays a certain safety protection role for the personal safety of the site operator and the safety of the equipment. When operating the operating mechanism to make the ground switch close, as the moment makes the spindle overcome the resistance moment, drive the inflection arm to rotate along the closing direction, and make the grounding lever through the dead point of the pressure spring, the pressure spring release energy, so that the ground switch quickly close, in the closing position. The grounding on the grounding assembly is firmly and reliably contacted by the disc spring and the flange part (mouth) of the static contact. During the breaking operation, the acting torque causes the spindle to overcome the main torque and spring force, driving the inflection arm to rotate along the breaking direction and causing the grounding pressure spring to pass through the dead point and the pressure spring energy storage to end for the next closing. The ground switch and the closing speed are independent of the human operation speed. Ground switch and fast ground switch difference: (overhaul) ground switch and fast ground switch are two different nature of the switch. Jiaxing ground switch manufacturer ground  switch can carry the specified rated short circuit current and the corresponding peak current for a specified period of time under abnormal conditions (e.g. short circuit).

The ground switch current transformer can give signals for relay protection. Various types of ground switches are available in single, double and triple pole configurations. The single pole is only used for neutral grounding system, double pole and three pole are used for neutral ungrounded system and share a common operating mechanism for operation. The normal working grounding when the line is inspected. When the circuit breaker is located on the line to be serviced, the circuit breaker is in the breaking position, both sides of the isolation switch are open, in the breaking state. The ground switch is closed for normal working grounding. To ensure the safety of equipment and maintenance personnel. Cut off the electrostatic, electromagnetic induction current. In two or more common towers or adjacent to it in the parallel arrangement of overhead transmission lines, when a return or several line blackouts, due to electromagnetic induction and electrostatic induction between it and the adjacent charged lines, induction voltage and induction current will be generated on the blackout return. Therefore, ground switches are used for these types of lines.

The ground switch is mainly used to ground the part of the high-voltage distribution device that needs to be de-energized and the charged part reliably to ensure the safety of the maintenance work. The contacts of the ground switch are all exposed in the air, with an obvious disconnection point, the ground switch does not have an interrupting device, so it cannot be used to cut off the load current or short-circuit current, otherwise, under the action of high voltage, the disconnection point will produce a strong arc, and it is difficult to extinguish itself, and may even cause a flying arc (relative to the ground or inter-phase short circuit), burning equipment and endangering personal safety, which is called "pulling the ground switch with load" serious accidents. The ground switch can also be used to perform switching operations for certain circuits to change the operation of the system. For example, in a double-bus circuit, a ground switch can be used to switch the running circuit from one bus to the other. Also, it can be used to operate some low current circuits. Ground switches are not required to carry rated currents under normal operating conditions.