Zeno Electric
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The 12kV SF6 gas insulated metal fully enclosed and fully insulated series ring network switch cabinets are widely used in 12kV power distribution systems and are the preferred switch products for power transformation and distribution systems for various urban and rural users.
The switch cabinet is a modular unit model that can be combined according to different uses; it is divided into two categories: fixed unit combinations and expandable units to meet the needs of various substations for flexible use of compact switch cabinets.
The 12kV GIS switch cabinet is a completely sealed system, with its electrical components and switches enclosed in a stainless steel body. The entire switchgear is not affected by external environmental conditions, thus ensuring operational reliability and personal safety. And it is maintenance-free. By choosing expandable busbars, any combination can be achieved, achieving full modularity. Extended busbar safety insulation and shielding ensure reliability and safety.
The 12kV GIS switch cabinet can also provide TV-based automation solutions, forming the concept of intelligent switches and minimizing the workload of on-site installation and debugging.
12kV GIS switchgear is divided into non-extended standard configuration and expandable standard configuration. Due to its full-module and semi-module combination and self-expandability, it has extremely special flexibility.
The design life is over 30 years operating under indoor conditions (20°C).
A variety of wire entry methods can realize various combinations of left, right, upper or forward wires. Any combination between units can be achieved using insulated bus bars, which can realize flexible design solutions of front and rear cabinets or left and right cabinets.
The 12kV series GIS switch cabinet is installed on a galvanized sheet frame, and the switch unit is in an SF6 air box. The air box is made of corrosion-resistant and non-magnetic 3mm thick stainless steel plate.
The SF6 air box is a "sealed pressure system" that can operate for 20 years under normal working conditions. The pressure of SF6 gas during normal operation is 0.15~0.4bar. The air box is equipped with a pressure release device to ensure that the gas can be released from the bottom or rear when the pressure is too high.
The load switch adopts a coaxial rotating double breakpoint method, and cooperates with the sliding plate through the same operating hole for kinetic operation. Therefore, the switch can only be in one of the three states of "closing, opening, and grounding" at any time, completely avoiding error operation.
The operating mechanism of the switch is installed on the front outside the air box. It is treated with special technology to prevent corrosion, facilitate manual operation and maintenance, and can easily realize electric operation.
The operating mechanism room is located in the upper part of the GIS cabinet. The mechanism rollers are closely matched with the switch operating panel. The bolt fixing mechanism is divided into single spring (incoming line mechanism) and double spring (outgoing line mechanism) to form the ring network loop and transformer loop respectively. The switches and springs are all disc springs, which have the characteristics of high assembly precision, small operating force, long life and high stability.
Auxiliary Contact: All load switches and circuit breakers can be equipped with 2NO+2NC indicating switch position. A parallel release coil (AC or DC) can be installed on a transformer switch/circuit breaker. The low voltage control unit is located behind the front panel.
Voltage Indication: Capacitive voltage indicator shows whether the bushing is charged and the socket on it can be used for phase checking.
Short Circuit/Grounding Fault Indicator: In order to facilitate fault location, the cable switch module can be equipped with short circuit/ground fault indicator for simple fault detection.
Electric Operation: Manual operation mechanism of cable switching unit and transformer unit is a standard scheme. Electric operation mechanism can also be installed. Cable switches, vacuum circuit breakers and grounding switches are operated by a mechanism located behind the front panel. For all switches and circuit breakers, they can be operated by operating handles (standard configuration), or can be equipped with motor operating mechanisms (accessories). However, the grounding switch can only be operated manually and is equipped with a mechanism capable of closing the fault current. Electric operation mechanism can be easily implemented in stages.
Cable Connection: Our gas insulated cabinet is equipped with standard bushing. All bushings are of the same height from the ground and are protected by cable chamber covers. The cover plate can be interlocked with the grounding switch, and special double cable chamber cover plate can also be used for double cable access.
Pressure Indicator: Usually equipped with pressure indicator, which is in the form of pressure gauge. In addition, electrical contacts can be equipped to indicate pressure reduction.
Arc Extinguishing Device: Arc extinguishers can be installed in all 12kV GIS ring network units. When the internal arcing occurs, the arc extinguisher automatically closes on the incoming bushing. The 12kV GIS switch and all cable modules of 12kV GIS switchgear including De, De and V modules can be equipped with an arc extinguisher. They must order with the unit without changing it.
The action of the arc extinguisher can indicate the SF6 in the cabinet in this way. The electrical contacts in the cabinet are wired to terminal blocks behind the front panel.
External Busbar: Switchgear can be equipped with external busbar.
Base: Gas insulated switchgear can be installed on a separate base. The design of the base has reserved cable entrance at both ends and behind. Two different heights are 272 mm and 450 mm respectively.
Secondary line chamber/low pressure chamber: Switchgear can be equipped with secondary cabinet or low voltage box on the top of the switchgear. The secondary cabinet is used to install ammeter (with or without switch) and live locking control unit. The low-voltage box is used to install relays such as SPAJ140 C, ammeter (with or without switch) and live locking control unit.
Lightning Arrester: Zinc oxide arrester can be installed in the cable of our switchgear cabinet, and zinc oxide arrester can also be installed in the bus or MP cabinet of our switch cabinet.
The parameters provided are typical operational values. If the existing configurations and styles do not align with your specific technical demands, custom design development options are available. Specialized engineering capabilities allow the delivery of customized power solutions to match varying site requirements worldwide.
The system utilizes SF6 (Sulfur Hexafluoride) gas as both the arc extinguishing and insulating medium. The electrical components are completely enclosed inside a sealed stainless steel housing.
Yes. With its fully sealed IP67-rated stainless steel body, the electrical components are shielded from dust, humidity, and small animals. The unit is designed to withstand short-term water immersion and remains maintenance-free for life.
It functions within an ambient air temperature range of -40ºC to 40ºC, at altitudes up to 2000m. It is also rated to handle earthquake forces of up to 8 degrees intensity.
It employs an integrated three-station load switch instead of standard isolation switches. Coupled with mechanical interlocking systems, it strictly prevents incorrect operational procedures, maintaining either "closing, opening, or grounding" statuses securely.
Yes. The GIS switch cabinet line supports both fixed configurations and expandable unit assemblies. By choosing insulated busbars, users can assemble customized layouts to suit compact spaces.
Yes, the switch cabinets can be outfitted with motorized operating mechanisms, as well as remote control and tracking accessories to fulfill grid automation requirements.
