Transformer 380V to 220V

For many years, the company has adopted professional process technology to produce SG series three-phase dry-type transformers between 500VA and 3000KVA. The products are newly developed and imported equipment transformers based on similar foreign products. The products comply with international and national standards such as VDE0550, IEC439, UL, IEC60309, JB5555, GB5226. The SG series three-phase dry-type transformer is suitable for various power supply scenarios with AC 50/60HZ and input and output voltages not exceeding 1200V. The various inputs and outputs, voltage levels, connection groups, tap position adjustment, winding capacity allocation, secondary winding configuration, and whether to require a casing of the product are carefully designed and manufactured according to the user's requirements.
Application of isolation transformer installed in stabilized power supply
1、 Connect an isolation transformer (delta/star) at the power input end
1. If the third harmonic and interference signals in the power grid are severe, using a △/Yo isolation transformer can remove the third harmonic and reduce the interference signals.
2. A △/Yo isolation transformer can be used to generate a new neutral line, making the equipment independent of the grid neutral line and avoiding abnormal operation of the equipment due to poor grid neutral line.
3. The current waveform distortion caused by nonlinear loads (such as third harmonic) can be isolated without polluting the power grid.
2、 Connect an isolation transformer (star/delta) at the power output end
1. To prevent current distortion of nonlinear loads, which affects the normal operation of the regulated power supply and returns to the power grid, and plays a role in purifying the power grid.
2. The distortion of nonlinear load current affects the accuracy of sampling. It can be sampled at the input of Yo/△ isolation transformer to obtain a signal that can reflect the actual situation and ensure the normal operation of the stabilized power supply.
3. If the load is unbalanced, using Yo/△ will not affect the normal operation of the regulated power supply. Low loss three-phase dry-type isolation transformer (H-class 180 ℃ insulation level), the transformer is the main component of various power sources and electrical equipment. The isolation transformer consists of a cylindrical winding and a laminated iron core. The iron core is made of new professional high silicon steel sheets stacked together with full diagonal joints. Our company adopts professional production technology, including imported winding machines and a complete set of vacuum pressure coating equipment; The winding adopts the method of forming a whole series of windings; Vacuum dip paint the transformer to achieve insulation level of F or H. The output and input voltage of the transformer can be designed according to customer requirements. There are various specifications including single-phase, three-phase, or multiple input and output.
Product parameters:
Capacity
10KVA (customized according to user needs)
input voltage
Rated voltage: 380V (customized according to user requirements)
output voltage
Rated voltage: 220V (customized according to user requirements)
Accuracy of output voltage
±1%
work efficiency
≥98%
Waveform distortion
No additional waveform distortion
Work protection
Equipped with overcurrent protection; Can work unattended for a long time
execution standard
The product complies with international national standards such as VDE0550, IEC439, UL, GB6450-86, JB5555, GB226, etc
insulation resistance
≥150M
insulation class
F level, H level, HC level are available for selection (usually F level)
wiring method
△/ Yo(常规）； Yo/Y0、Y/ △、△/△
electric strength
Power frequency sine voltage of 3000V for 1 minute without breakdown or flicker phenomenon
overload protection
Twice the rated current can be maintained for 1 minute
frequency
50Hz/60Hz
cooling method
Self cooling type
cooling form
dry-type
Iron core form
Core type
Moisture proof method
open-ended
ambient temperature
-50℃+120℃
altitude
＜1000m
relative humidity
＜90%

Product Features
Establishing a new neutral grounding system in the transformer can relieve the troubles of harmonic interference and other neutral lines in the power grid. The isolation transformer converts the three wire △ connection to a four wire Yo system, and adding isolation further eliminates high-frequency pulse interference and noise coupled inside the transformer. The isolation transformer must be correctly and properly grounded, which is very strict, otherwise the anti harmonic interference will be ineffective. Our company can design and produce high-quality isolation transformers for customers.