Why Should The Stainless Steel Box Transformer Casing Be Protected Against Static Electricity?

May 20, 2023

Why should the stainless steel box transformer casing be protected against static electricity?

Fengyuan Electric Power Technology has been producing and manufacturing box transformer shells for many years. We have conducted in-depth analysis and recording of the occurrence of static electricity in stainless steel box transformer shells inquired about by peers. After comparative research, it has been found that the reason for the static electricity phenomenon in stainless steel box transformer shells is due to the generation of certain electromagnetic fields around the internal micro electromechanical equipment and electronic components, causing free charges in nearby conductors to redistribute under the action of electric field forces, When an equal amount of positive and negative induced charges appear at both ends of the conductor, an electrostatic arc reaction occurs when the charged ions around the human body react with the surrounding electric field.

Those who understand the circuit know that when the electrode ions of these electric fields come into contact with charged solid particles suspended in the air, stainless steel, as a conductive material, is relatively easy to attract these charged solid particles. As the electronic components inside the box transformer operate normally, these charged particles affect the balance of the electrical layer, When the accumulation of static electricity reaches a certain level, a high voltage of tens of thousands of volts is instantly released, which can cause the aging of electronic components inside the stainless steel box transformer casing and reduce product performance. In severe cases, it can directly breakdown the integrated circuits and precision electronic components of electronic equipment, leading to power accidents.

Since the static electricity hazard of the stainless steel box transformer casing is so serious, how to do static electricity protection for the stainless steel box transformer casing?

Fengyuan Power Equipment Company has finally overcome this problem after multiple tests. Since the main function of the stainless steel box transformer casing is not to prevent fire and water discharge of internal substation equipment, it is mainly to protect the structural safety and stable operation of internal equipment. So, add a layer of electrostatic protection net at the fan for heat dissipation or at the cavity where natural air cooling is adopted as a whole. This layer of electrostatic protection net is similar to our common dust screen window, which can prevent large particles of dust from entering the interior of the stainless steel box transformer casing. It can also accelerate the absorption of static electricity flow through the equipotential voltage of the protection net, maintaining the overall potential balance of the secondary equipment electrical components inside the stainless steel box transformer casing.

In summary, to ensure that the internal equipment of the stainless steel box transformer casing is not affected by external environmental safety, it is necessary to continuously improve these small details of static electricity protection of the stainless steel box transformer casing!

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TECHNICAL REQUIREMENTS AND CHARACTERISTICS OF EQUIPMENT
Re:82 sets compact substation
Item-
No.
Schedule of Technical Data Unit Required (at
3000 m
Offered Data
System Data Requirements
1.05.10 Stranded copper conductor for earthing
Manufacturer -
Material - copper
Cross-section mm2 >50
Length m >40
1.05.11 Earthing rods
Manufacturer -
Type -
Materia! -
Length m
Sections per rod pcs
1.6 Compact Substations (Option 1)
Manufacturer - fengyuan
Type - OutDoor
Overall protection class for complete substation - IP 44 IP 44
Material of enclosure - GI
Overall dimensions (W x L x H)
for S/S with 1x50 kVA transformer mm/mm/mm 3000x1850x2150
■ for S/S with 1x100 kVA transformer mm/mm/mm 3000x1850x2150
for S/S with 1x160 kVA transformer mm/mm/mm 3000x1850x2150
• for S/S with 1x250 kVA transformer mm/mm/mm 3000x1850x2150
Overall weight
■ for S/S with 1x50 kVA transformer kg 1000kg.
■ for S/S with 1x100 kVA transformer kg 1000kg.
■ for S/S with 1x160 kVA transformer kg 1000kg.
■ for S/S with 1x250 kVA transformer kg 1000kg.
1.6.1 20 kV Switchgear equipment
Manufacturer - Chnt / Equivalent
Type - Indoor RMU

 

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