Product Introduction
A three-phase isolation transformer is a power equipment that utilizes the principle of electromagnetic induction to achieve energy transmission and electrical isolation. Its core lies in establishing a safe electrical isolation barrier between the input and output circuits through independent primary and secondary windings, effectively preventing electric shock accidents and suppressing high-frequency clutter and common mode interference in the power grid. This transformer is mainly used for voltage conversion, power purification, and safety protection functions. It is widely used in industrial and mining enterprises, high-rise buildings, subway stations with high requirements for safety and fire prevention, as well as medical equipment, precision instruments, new energy systems, and imported equipment that needs to adapt to different voltage standards. Currently, its development is trending towards using new materials to improve energy efficiency and integrating intelligent monitoring functions to meet the needs of the smart grid. The main advantages are:
- Safe and reliable: Electric energy is transmitted between the input winding and the output winding through electromagnetic induction, and the two are completely isolated electrically. This design creates an effective electrical isolation barrier that can significantly reduce the risk of electric shock and provide safety protection for subsequent equipment. When a short circuit or fault occurs in the power system, it can effectively isolate the faulty part and protect the safe operation of other equipment;
- Energy saving: High quality cold-rolled silicon steel sheets and high-end electromagnetic wires are used to achieve lower core and winding losses. The vacuum coating process (such as BLOCK IMPEX technology) improves moisture resistance and corrosion resistance, and reduces operational noise;
- Excellent heat dissipation performance, strong overload capacity, and long service life: The optimized cooling channel ensures that the heat generated by the winding is quickly carried away by the air, significantly improving its overload capacity and meeting short-term high-power requirements. Efficient heat dissipation directly reduces the temperature rise of the winding, thereby extending its service life and improving operational stability;
- Structural optimization, easy installation: Equipped with integrated lifting rings for easy transportation and installation. Easy to access terminal blocks simplify electrical system installation. Some models come with a ± 5% tap on the secondary side for easy voltage adjustment;
- Highly customized: Customization of different capacities (0.2kVA~3000kVA), voltage combinations, and connection groups (Dyn11, Yyn0, Dd0, etc.). Optional protective casing (IP20 and above), air cooling system, transformer, etc.
Basic Specification Parameters
|
Item |
Specification range |
|
Input voltage |
3φ220V / 380V / 400V / 415V / 480V / 690V etc. (Customizable) |
|
Rated capacity |
0.2 kVA ~ 3,000 kVA |
|
Rated frequency |
50Hz/60Hz (adaptive) |
|
Phase |
three-phase |
|
Voltage regulation method |
Dyn5, Dyn11, Yyn0, Dd0, etc. (usually Dyn11) |
|
insulation class |
F-class (155 ℃) standard/H-class (180 ℃) optional |
Technical Parameter
Specification selection reference
|
Capacity |
Input voltage |
Output voltage |
No-load loss |
Load loss |
Impedance % |
Dimensions (W × H × D/mm) |
Weight |
Conductor |
|
2 kVA |
3x400V |
3x400V |
~40W |
~90W |
4% |
240×141×265 |
~25kg |
Copper |
|
25 kVA |
3x690V |
3x380/400/420V |
336W |
288W |
1.2% |
550×510×300 |
226kg |
Copper |
|
75 kVA |
3x480V |
3x240V |
- |
<760W |
<5% |
950×900×550 |
350kg |
Copper |
|
315 kVA |
3x400V |
3x400V |
1156W |
5797W |
3.3% |
1000×1040×555 |
865kg |
Aluminum |
|
630 kVA |
3x380V |
3x400V |
- |
- |
~5% |
Customize |
~1800kg |
Copper/Aluminum |
FAQs
Q1: What are the requirements for installation environment?
A: The three-phase isolation transformer should be installed at:
A well ventilated and dry place to ensure heat dissipation;
Avoid environments that are humid, dusty, have corrosive gases or conductive dust;
The installation ground is flat and sturdy, capable of withstanding the weight of transformers;
Indoor installation requires a protection level of IP20 or above, while outdoor installation requires IP55 or higher;
Maintain distance from other devices, ensure air circulation, and prevent overheating.
Q2:What is the overload capacity for a three phase isolation transformer?
A: Overload capacity: The SBK series can operate at more than 1.2 times the rated load for 4 hours and can operate at full load for a long time.
Q3: What is the efficiency of a three-phase isolation transformer?
A: The efficiency of three-phase isolation transformers is usually between 95% and 98%, depending on capacity and design.
Q4: What special functions can be customized for three-phase isolation transformers?
A: Highly customizable according to requirements, mainly including: Voltage combination; Connection group; Shielding layer; Protection level and additional configurations.
Q5: What are the common faults of three-phase isolation transformers?
A: There are three common types of faults:Iron core malfunction; Winding fault and Tap changer malfunction.
Q6: Daily maintenance suggestions for three-phase isolation transformers?
A: Check the wiring terminals for oxidation every month; Quarterly testing of insulation resistance values; Clean the heat dissipation channel annually.
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