Box type transformer
Relevant knowledge of box type transformer
What is a transformer?
It is a device that uses the principle of electromagnetic induction to change the AC voltage.
It is often used for voltage rise and fall, matching impedance, safety isolation, etc.
What is a box type transformer?
Box type transformer, also known as box type substation, is a complete set of power transformation and distribution equipment that combines transformer, load switch and protection device of high-voltage receiving part, low-voltage power distribution device,low-voltage metering system and reactive power compensation device.
The box type transformer is not just a transformer, it is equivalent to a small substation, belonging to the power distribution station, and directly provides power to users.
Advantages of box type transformer
Box type transformer centralizes the traditional transformer in the box type housing, featuring low investment, small volume, short construction period, convenient maintenance, high reliability, diversified appearance, easy coordination with the surrounding environment, light weight, low noise and low loss.
Application scope of box type transformer
It is widely used in residential quarters, streets, large construction sites, high-rise buildings, parks, business centers, light rail, airports, factories and mines, enterprises, hospitals, schools, temporary facilities, etc.
Box type transformer structureIt
includes high-voltage chamber, transformer chamber and low-voltage chamber.
Different companies have different model meanings
Box type substation
Classification (by product structure, internal components and styles)
American style , also known as "combined transformer" and "combined substation"
European style, also known as "box type transformer" and "box type substation"
Difference between appearance of box type transformer and other products
1.There is a transformer behind the American box type transformer；
2.The European box type transformer substation has doors on all sides, and the ring main unit has doors on only one side.
Internal and external structure of box type transformer
H：High voltage room
L：Low voltage room
T：Transformer room
Category and applicable place of box type transformer
Internal structure of box type transformer - high-voltage chamber
High voltage room
1. High voltage incoming cabinet
2. High voltage outgoing cabinet
3. High voltage ring network cabinet
(If it is ring network box type substation)
4. High voltage metering cabinet
(If the customer requires high-pressure metering)
Main components of high-voltage part
1. Live display DXN;
2. High voltage arrester FV;
3. High voltage load switch QF;
4. High voltage fuse;
5. High voltage grounding switch;
3, 4, 5 combined together into high voltage load switch FN12-12DR/125. High voltage metering cabinet includes: Current transformer TA; Voltage transformer PT; Fuse.
Internal structure of box type transformer - photos of high-voltage room
Internal structure of box type transformer - photos of high-voltage room
Internal structure of box type transformer - photos of high-voltage room
Internal drawing of high voltage metering cabinet
Internal structure of box type transformer - high-voltage room components
Live display DXN
The display device consists of a voltage sensor and a display, and the two parts form a voltage display device through installation and wiring.
The voltage sensor is an epoxy resin cast post insulator. The voltage signal of 70V is taken out from the 10kV high voltage through the voltage sensor.
Function
It is used to reflect whether the high-voltage circuit power supply at the display device is energized or not.
QF High voltage load switch FN12-12/630
Post time: Oct-10-2022