Talking about indoor high voltage sf6 load break switch

Talking about indoor high voltage sf6 load break switch

The load break switch is a kind of switchgear with a simple arc extinguishing device. It uses SF6 gas as the insulation and arc extinguishing medium. It can be used as the closing and breaking load current and overload current. It can also be used as the closing and breaking no-load. Lines, no-load transformers and capacitor banks, etc., all three-position load switches with on, off and grounding functions are simple in structure and affordable.
In addition to long life, strong breaking force and other advantages of vacuum load switch, its outstanding advantages are easy to achieve three working positions (on, off and ground), small current (inductance, capacitance) breaking, anti- Strong environmental conditions. It is suitable for promotion and application in urban and rural medium voltage distribution networks.

(Three positions schematic diagram)

SF6 load break switch + fuse combination is the SF6 load switch to bear the overload current (this overload current is still within the range of the load switch rated breaking current for the SF6 load switch) and the normal operating current of the closing and breaking, It is also required to bear the breaking of the “transfer current”. The short-circuit protection and overload protection on the high-voltage side of the transformer are borne by the high-voltage current-limiting fuse. At this time, a group of SF6 load switches and three fuses with triggers, as long as any one of the triggers is actuated, the linkage mechanism will automatically open the three phases of the load switch at the same time. The combination of the two can meet the requirements of the operation and protection of various normal and faulty distribution systems.

Characteristics of sf6 load break switch:
Firstly, SF6 load break switch has excellent insulating properties. SF6 gas has high insulating strength, which can effectively prevent the leakage and breakdown of current and ensure the safe operation of equipment. In addition, SF6 gas has good heat resistance and chemical stability, which can work stably in various harsh environments.

Secondly, SF6 load break switch has excellent arc extinguishing performance. When the current is interrupted, SF6 gas can quickly form a high temperature arc, and quickly extinguish it, thus effectively preventing the arc from continuing and equipment damage. This arc extinguishing performance makes SF6 load break switch in the high-voltage power system has an important application value.

In addition, SF6 load break switch also has the advantages of small size, light weight and reliable operation. Compared with the traditional air load switch, SF6 load break switch has smaller volume and weight, which can save equipment space and transport cost. At the same time, SF6 load break switch adopts advanced control system and reliable mechanical structure, which can realise remote operation and automatic control, and improve the reliability and operation efficiency of the equipment.

SF6 Load break switch normal working Environment
1. Altitude: ≤1000m
2. Ambient temperature at -30℃ to +40℃, the daily average temperature should not more than 30℃.
3. The daily average of relative humidity is less than 95%, the average monthly is less than 90%.
4. Working environment should be without steam, gas, chemical corrosive deposition, salt fog, dust, dirt and other dangerous explosive media, which will severely impact on insulation and conductivity of products.
5. Working environment should not be regular vibration or serious bumps.

SF6 Load break switch construction

Tank (main loop structure)

Types of SF6 Load break switch

SF6 load break switch installation location: Ring Main Unit

Types of Spring operating mechanism

Instructions for use of sf6 load break switch:
When using the SF6 load break switch, the following should be noted:
1. before operation, the electrical and mechanical status of the equipment should be checked to ensure normal operation.
2. in the process of operation, it should be carried out according to the operation regulations to avoid misoperation and operation errors.
3. in case of equipment failure or abnormality, it should be shut down for maintenance in time to ensure the safe operation of the equipment.
4. when the equipment is out of use or stored for a long time, moisture-proof, dust-proof, anti-corrosion and other measures should be carried out to ensure the service life of the equipment.

Order instructions
1. Product model
2. Product rated current, rated voltage, short-time breaking current
3. For incoming or outgoing line, single spring or double spring
4. Product phase distance(210mm, 230mm, 275mm, 350mm, etc)
5. Operating mechanism: manual / electric, electric to confirm the operating voltage
6. Two-station or three-station