|
Special Features:
|
| 1. |
Low loss,low noise,low partial discharge,high reliability,great overload capacity and high heat-resistance. |
|
| 2. |
Excellent anti-short circuit capability and great anti-lightning impulse capability. |
| 3. |
HV windings are manufactured with the NOMEX paper-covered oxygen-free and high-conductivity copper conductor from American DuPont Company,which features high aging-resistance and long service lifetime. |
| 4. |
The advanced VPI (Vacuum Pressure Impregnation) technology is adopted to enable the products with excellent electric and mechanical performance. |
| 5. |
Simulation analysis is adopted during the core designing to avoid the cavity resonance and substantially reduce the noise. During the HV winding module design,lightning impulse wave process is simulated for calculation and analysis,thus to improve product’s anti-lightning impulse capability. |
|
Other Advantages:
The SGH(B) series non-encapsulated H-class dry-type transformer from Pearl Electric is the transformer featuring low noise,low partial discharge and low loss. It is manufactured with the NOMEX insulation material recognized by UL laboratory. The LV windings adopt foil-wound structure and HV windings adopt continuous disk-winding structure,both of which are moulded through vacuum pressure impregnation. It features reasonable structure,superior material,scientific design,strict technology,advanced test process,energy-conservation & environment-friendly. It also has the following features:
|
| 1. |
Self-extinguishing and inflaming retarding,fire-proof and explosion-proof,pollution-free and no toxic gas being generated. |
| 2. |
Excellent damp-proof performance,capable of working under 100% relative humidity and other harsh conditions,with no damp-removing measures needed. |
| 3. |
Not sensitive to dust and environment pollutions. Excellent structure design realizes chap-free features and high heat-dispersion performance. |
| 4. |
Great overload capability,capable of operating continuously under 120% overload conditions and in case of air forced cooling,operating continuously under150% overload conditions. |
| 5. |
Nice appearance,small-size,less installation space occupation and low engineering cost. |
| 6. |
Each performance index and technical specification excels those specified in China GB,international IEC or industrial standards. |
|
Core:
The core is manufactured with high quality cold rolled grain-oriented silicon steel of high magnetic conductivity. 45° mitring and 5-steps overlapping structure is adopted for the core design,thus to greatly reduce no-load loss and no-load current. To precisely calculate resonance frequency and intensity and avoid cavity resonance generated by the core structure during operation,simulation analysis is carried out for core mould design. Flexible connections are made between core and coils,core and bogie. With these measures adopted,the noise level is reduced by 10~15dB compared with the international standard.
HV winding:
HV winding is manufactured with high quality copper wire,reinforced with glass fiber and being cast with epoxy resin at vacuum state with pressure. The cast resin will completely be soaked into coils,so the partial discharge of 10kV product is low,and will not exceed 5pC. HV windings adopt excellent structure,and with lighting impulse wave simulation calculating and analyzing,the ability of resisting lighting impulse is improved.
LV winding:
LV winding (capacity no less than 400kVA) is manufactured in high quality foil conductor,so the ampere-turn is balanced and the additional loss is low and the performance of anti-short circuit is improved. Air drains of heat dispersion are ingeniously used in the winding,and the surface of heat dissipation is increased,so the temperature is reduced and the ability of over-load is improved.
Protective enclosure:
Attractive and durable protective enclosures are available to provide additional protection for transformer,and the protection level is IP20,IP23 or higher,the material is stainless steel plate and aluminum alloy plate,etc. IP20 enclosure provides protection against the entrance of foreign objects with diameter exceeding 12mm,and withstands accidental shock. IP23 enclosure,in addition to functions of IP20 enclosure,also provides protection against rainfall at a vertical angle of less than 60°. But the IP23 enclosure will reduce cooling capacity of the transformer about 5%~10%,this must be taken into account. The cable support will be supplied for HV(LV) incoming (outgoing) connection from bottom of enclosure.
Executed standards:
GB/T10228，GB1094.11，IEC60076-11，DIN42523
|
Safe and secure payments using Abraa safe trade systems 
\
