SG SBK series three-phase dry type isolation transformer is a new generation of energy-saving power transformer developed and produced by our factory on the basis of referring to similar international products and combining the national conditions of our country. From 300VA to 2000KVA, it complies with international and national standards such as IEC439, GB5226, etc., and the winding adopts the method of removing the tire and winding in full row; The transformer shall be vacuum dipped to make the insulation level of the transformer reach F or H, and the product performance reach the advanced level at home and abroad. SG series three-phase dry type isolation transformers are widely used in circuits with AC 50Hz to 60Hz and voltage below 2000V, and are widely used in imported important equipment, precision machine tools, mechanical and electronic equipment, medical equipment, rectification devices, lighting, etc. The various input and output voltages, connection groups, the number and position of regulating taps (generally ± 5%), the distribution of winding capacity, the configuration of secondary single-phase windings, the application of rectifier circuits, and whether the enclosure is required can be carefully designed and manufactured according to the user's requirements.
+Product features
The establishment of a new neutral grounding in the isolation transformer can eliminate the common mode interference and other midlines in the power grid. The isolation transformer converts the three wire △ connection to the four wire Yo system. The shielding further eliminates the high-frequency pulse interference and noise coupled by the transformer. Although the shielded isolation transformer can effectively prevent various N-G interference (pulse and high-frequency noise), the transformer must be properly grounded, Very strict, otherwise the anti common mode interference will be ineffective. The company can design and produce high-quality isolation transformers for customers.
+Feature advantages:
Ø High isolation
Ø N-G has good performance
Ø High common mode interference suppression
Ø Convert △ to Y or Y to △
Ø Voltage tap is easy to switch
Ø Designed according to the special performance requirements of users
+Application of the Isolation Transformer in Stabilized Voltage Power Supply
1、 Connect the isolation transformer (delta/star) at the power input end
1. If the third harmonic and interference signal of the power grid are relatively serious, △/Yo isolation transformer can be used to remove the third harmonic and reduce the interference signal.
2. △/Yo isolation transformer can be used to generate new neutral line, so that the equipment has nothing to do with the neutral line of the power grid to avoid abnormal operation of the equipment due to poor neutral line of the power grid.
3. The current waveform distortion caused by nonlinear load (such as the third harmonic) can be isolated without polluting the power grid.
2、 Connect the isolation transformer (star/delta) at the power output end
1. It can prevent the current distortion of nonlinear load from affecting the normal operation of the stabilized voltage supply and returning to the power grid, so as to purify the power grid.
2. The distortion of nonlinear load current affects the accuracy of sampling. You can sample at the input of Yo/△ isolation transformer to obtain control signals that can reflect the actual situation, so that the stabilized voltage supply can be controlled normally.
- If the load is unbalanced, the use of Yo/△ will not affect the normal operation of the regulated power supply.
technical parameter
Insulation grade F, H and HC are available (generally F)
Wiring mode: Y/Y, Y/△, △/Y, any combination of △/△
Electrical strength Power frequency sinusoidal voltage 3000v, lasting for 1 minute, without breakdown and flicker
Overload protection twice the rated current for 1 minute
Frequency 50Hz/60Hz
Cooling mode Self cooling
Cooling type: dry
Core form Core type
Damp proof mode Open type
Ambient temperature - 15 ℃+40 ℃
Altitude < 1000m
Product model: with case SG without case: SBK
Input voltage: any rated voltage below 2000V ± 10% Ambient temperature - 15 ℃ -+40 ℃
Output voltage: any rated voltage below 2000V+5% (no-load) altitude<1000m
Input current: output current efficiency ≥ 95%, relative humidity<90%
No additional waveform distortion The installation site shall be free of gas, steam, chemical deposition, dust, dirt and other explosive and corrosive media that seriously affect the transformer insulation
Function with chassis configuration: with input voltage, output voltage and current indication, protection switch can be configured as required
The protection has over-current protection and can be left unattended for a long time
Insulation resistance ≥ 50M
Electrical strength, power frequency, sinusoidal voltage, 2000V, without breakdown and flashover for 1 minute. If the special conditions for use do not meet the above requirements, the user shall negotiate with our factory to determine
Overload capacity twice the rated current for 1 minute
■ Specifications, models and installation dimensions
Specification Input voltage Output voltage Without enclosure Product size (cm)/weight (kg) With enclosure size (cm)/weight (kg)
SG-5 KVA 660V, 400V, 380V, 200V
380V can be customized according to customer requirements
220V, 110V, 36V
Customized according to customer requirements × fifteen × 25/35 45 × twenty-five × 30/56
SG-6KVA 30 × sixteen × 25/40 45 × twenty-five × 30/64
SG-7KVA 35 × fifteen × 30/45 50 × twenty-five × 35/80
SG-8KVA 35 × sixteen × 30/55 50 × twenty-five × 35/80
SG-10KVA 42 × twenty-one × 42/90 60 × thirty-two × 65/130
SG-15KVA 1140V, 690v, 480v, 660V, 400V, 440v, 415V, 380V, 200V
1140V can be customized according to customer requirements
660V, 690v, 480v, 460v, 450v, 380V, 220V, 200v, 208v, 280v, 127v, 110V, 36V
Customized according to customer requirements 52 × twenty-four × 52/135 70 × thirty-five × 77/185
SG-20KVA 52 × twenty-four × 52/180 70 × thirty-five × 77/220
SG-30KVA 55 × twenty-eight × 65/220 80 × forty × 87/260
SG-40KVA 61 × thirty × 65/265 90 × fifty × 95/320
SG-50KVA 61 × thirty × 65/295 90 × fifty × 95/360
SG-60KVA 70 × thirty-two × 66/370 100 × fifty × 105/440
SG-80KVA 70 × thirty-two × 67/450 100 × fifty × 105/530
SG-100KVA 75 × thirty-five × 68/490 100 × fifty × 105/570
SG-120KVA 75 × thirty-five × 68 100 × fifty × 105/600
SG-150KVA 85 × thirty-seven × 68 120 × sixty-five × 115/690
SG-180KVA 95 × forty-five × 83 120 × sixty-five × 115/930
SG-200KVA 95 × forty-five × 83 120 × sixty-five × 115/1010
SG-250KVA 95 × forty-five × 83 120 × sixty-five × 115/1180
SG-300KVA 105 × forty-five × 95 120 × seventy × 125/1450
SG-320KVA 105 × forty-five × 95 130 × fifty × 135/1490
SG-350KVA 105 × forty-five × 95 130 × fifty × 135/1600
SG-400KVA 115 × fifty-five × 105 140 × sixty × 145/1700
Post time: Dec-22-2022