The description of SG-250KVA three-phase isolation transformer

SG-250KVA three-phase isolation transformer is a new generation of energy-saving dry-type transformer developed and produced by our company with reference to similar international products and based on China's national conditions. From 300VA to 1000KVA, it conforms to international and national standards such as IEC439 and GB5226. The whole winding method is adopted; the transformer is vacuum dipped to make the insulation level of the transformer reach F or H. SG-250KVA three-phase isolation transformer performance reaches the advanced level at home and abroad. S (J) G series three-phase dry-type transformers are widely used in circuits with AC 50Hz to 60Hz and voltage below 1500V. They are widely used in mines, coal mines, imported important equipment, precision machine tools, mechanical and electronic equipment, medical equipment, rectifiers, Lighting, etc. Various input and output voltage levels of the product, connection group, number and position of adjustment taps (typically ± 5%) Distribution of winding capacity, provision of secondary single-phase windings, use of rectifier circuits, is it required to have a casing that can be carefully designed and manufactured according to user requirements. Shielding further eliminates high-frequency pulse interference and noise coupled by the SG-250KVA three-phase isolation transformer. Although shielded isolation transformers can effectively prevent various N-G interference (pulse and high-frequency noise), the transformer must be properly and properly grounded.

The features of SG-250KVA three-phase isolation transformer

SG-250KVA three-phase isolation transformer can be made into open or protective type, which has the advantages of low loss, low noise, good fire resistance and no environmental pollution. SG-250KVA three-phase isolation transformer are divided into control transformers and lighting transformers according to the purpose of the product; control transformers are fixed transformers. In addition to lighting transformers for machine tools, lighting transformers are portable transformers. The iron core of the transformer is made of cold-rolled silicon steel sheet,and both sides of the iron yoke are made of profiled steel or steel plate as clamps and fastened by screws. SG-250KVA three-phase isolation transformer is divided into two types: open type and protective type according to the structure. The protective type is processed into a box shell by using a steel plate. The transformer is inside the box shell and there are wire entry and exit holes outside the box shell for installing power lines. If necessary, you can add voltmeters, ammeters, temperature controllers, steering wheels, etc.

The applications of SG-250KVA three-phase isolation transformer

SG-250KVA three-phase isolation transformer are suitable for circuits with AC 50 ~ 60Hz and input voltage not exceeding 1500V. They can be used as control power, local lighting and indicating power for various types of machine tools, machinery and other general electrical appliances, and can also be used as small power sources.

The technical advantages of SG-250KVA three-phase isolation transformer

1, Wiring mode Y / yn D / yn D / D (optional)

2. Input voltage: 380V Output voltage: 380V

3. Efficiency: ≥90%

4, waveform distortion: no additional waveform distortion

5, function: with input voltage, output voltage, current and other instructions

7, long-term continuous unattended work

8, Insulation resistance: ≥50MΩ

9, Electrical strength: Power frequency sinusoidal voltage 2500V for one minute without breakdown and flashover

10, overload capacity of SG-250KVA three-phase isolation transformer

The establishment of a new neutral-ground in a three-phase transformer can relieve the common-mode interference and other neutrals in the power grid. The SG-250KVA three-phase isolation transformer converts the three-wire delta connection to a four-wire Yo system and the shielding further eliminates the high-frequency pulses coupled by the transformer. Interference and noise. Although the SG-250KVA three-phase isolation transformer can effectively prevent various NG interference (pulse and high-frequency noise), the transformer must be properly and properly grounded and very strict, otherwise the anti-common mode interference will have no effect. The company can design and produce high-quality dry-type isolated step-down transformers for customers.