12kv Indoor Sf6 Switch-Disconnector FL (R) N36 Load Break Switch Lbs

Product Description

General Information

12kV Indoor SF6 Switch-Disconnector FL(R)N36 Load Break Switch LBS is a double-break rotary load switch using SF6 gas as the insulating and arc-extinguishing medium. It is suitable for 12kV power distribution systems. Each switch is permanently sealed after being filled with 0.4bar pressure SF6 gas. The switch can be installed vertically or horizontally. The typical installation method in the ring main unit is to install a steel partition horizontally between the cable room and the busbar room. This installation method isolates the busbar from the cable joint to comply with safety requirements for operation and maintenance.

Combining the FLN36-12 indoor high-voltage SF6 load switch with other electrical components can realize control and protection functions and serve as the control and protection of electrical equipment in industrial and mining enterprises, civil power supply and secondary substations. Among them, the FLRN36-12kV load switch-fuse combination appliance matches the protection characteristics of the transformer and is especially suitable for ring network power supply units.

Structural Features

1. FLN36-12 load switch adopts double break and rotary movable contact, which has the following three states: closing; opening; grounding.
2. The load switch uses SF6 as the arc extinguishing and insulating medium. The switch is sealed by the upper and lower shells cast by epoxy resin and has good insulation performance.
3. If arcing occurs internally and there is a structural weak point at the rear of the casing, it will be flushed open. Then the arc leakage valve on the cabinet will be flushed open and the overpressure airflow will be directed to the outside of the cabinet. The safety performance is good.
4. Each load switch is sealed and maintenance-free for life.
5. The relative pressure of SF6 gas in the load switch is 0.045Mpa.
6. The mechanical life of the load switch is 5000 closing-opening times and 2000 opening-opening times.
7. The FLN36-12 load switch and operating mechanism are placed in the detachable upper unit. It can be easily changed into a load switch + fuse combination electrical cabinet, or a load switch + fuse combination electrical cabinet. into load switch cabinet.

Operating Mechanism

The spring operating mechanism of the load switch and its combined electrical appliances is divided into single spring operating mechanism and double spring operating mechanism. The FLN36-12D load switch equipped with a single spring operating mechanism is mainly used for the incoming and outgoing line control unit. The FLRN36-12D load switch-fuse combination appliance equipped with a double spring operating mechanism is mainly used for transformer protection units.

Usage Environment

1. Ambient air temperature: upper limit +40ºC, lower limit -15ºC.
2. Environmental humidity: The daily average relative humidity is not greater than 95%, and the monthly average relative humidity is not greater than 90%.
3. Altitude: The maximum altitude of the equipment installation site is 2000m.
4. Earthquake: The earthquake intensity does not exceed 8 degrees.
5. The surrounding air should not be significantly polluted by corrosive flammable gases, water vapor, etc. There should be no frequent severe vibrations.

Appearance Size One (Phase Distance 200mm)

Appearance Size Two (Phase Distance 210mm)

Breaking Principle

SF6 gas has good arc extinguishing performance. In order to extinguish the arc quickly, when the switch is breaking the current, an arc will be generated when the moving and static contacts are just separated. At this time, due to the magnetic field of the permanent magnet, the arc will be driven to move quickly, causing the arc to It is elongated and continuously combined with SF6 gas to be quickly dissociated and cooled. It is extinguished when the current crosses zero. The double fracture opening distance has the insulation level of isolating the fracture. Permanent magnet rotating arc principle, small operating power, strong extinguishing ability, light contact burn, and extended electrical life.

Installation and Debugging

1. Before installation and debugging, be sure to read the instruction manual carefully and make the following preparations: First, check whether there is any damage to the appearance. Damaged products should be stopped immediately. The second step is to remove contamination on the surface of the product due to transportation or other reasons.
2. When the operating mechanism and the switch body are assembled, it must be ensured that they are reliably fixed, and their connecting parts should be reliably fixed on the operating shaft of the switch body, and the components connecting the load switch should also be reliably fixed on the switch body. on the switch.
3. After the installation is completed, confirm that the load switch is in the opening position, insert the operating handle into the grounding operating hole on the upper end of the panel, and turn the handle 180 clockwise. To perform ground closing, rotate the handle 180 degrees counterclockwise. Complete the closing of the grounding switch.
4. When performing the closing operation, first confirm that the load switch is in the opening position, then insert the operating handle into the load switch operating hole at the lower end of the panel, and rotate the operating handle 180″ clockwise to complete the closing operation of the load switch.
5. During the process of moving the load switch from the closing position to the opening position, use the K-type operating mechanism, insert the operating handle into the operating hole of the load switch, and rotate the handle counterclockwise 180″ to perform the opening operation; for the A-type operating mechanism, Operating mechanism, press the opening button to open the load switch, check through the observation window whether the position of the switch is correct, and whether the corresponding observation instructions meet the requirements.
6. Note: The grounding or load can only be closed when the switch is in the open position!

Maintenance and Care

Under normal use conditions where the environment meets the requirements of the installation and operation instructions, the switch body is guaranteed to be maintenance-free for 20 years. Due to environmental differences, necessary inspection and maintenance work on the load switch is still required.

1. According to the working environment, conduct appropriate visual inspection of the insulation cover between June and December, and remove dirty and damp surfaces.
2. Carry out lubrication and operation inspection of the operating mechanism 1 to 2 times a year to ensure normal operation.
3. For load switches equipped with pressure gauges, the readings of the pressure gauges should be checked from time to time.
4. When a fault current passes through the load switch fuse combination appliance and one phase fuse blows, all three phase fuses must be replaced. When replacing, the grounding switch must be closed first before replacement, and ensure that all three-phase fuses are installed in place.

Switch Cabinet Display

Special Customization

The above parameters are typical data; if the existing styles do not meet your specific demands, please contact us for a custom design.We have significant personalized customization development and production skills, allowing us to provide tailored solutions to customers all over the world.