Model Number

dry type transformer Non-encapsulated Transfomer

SG(B)9 series: Heat resistance grade is Grade H: no-load  loss is 10% lower than that of national standard; on-load loss is

10% lower than that of national standard; the noise is 10-20dB lower than that of national standard; the designed service

life is 30 years.
SG(B)10 series: Heat resistance grade is Grade H: no-load loss is 20% lower than that of national standard; on-load loss is

15% lower than that of national standard; the noise is 15-30 dB lower than that of national standard; the design life is 30

years.

Functional Features

1. Safe and environment-friendly insulation system
For SG (B) series of transformers, the insulation system based on the NOMEX占쏙옙 paper is adopted. NOMEX占쏙옙 paper is world

recognized high quality electric insulation material so SG series of transformers have excellent electric and mechanical

performance. Moreover, NOMEX占쏙옙 paper is nontoxic, non-combustion-supporting and radiation-resistant. The reclaim of the

transformer is easy after use; copper wire and core can be recycled to be used to really to be green product.

2. Low loss, less partial discharge, and more stable performance
Small volume, lightweight, low local discharge. The power frequency breakdown field strength of NOMEX 占쏙옙paper is 20- 40kV

/mm. The relative dielectric constant is close to that of air. Thus the electric field distribution becomes more reasonable

and the partial discharge is effectively reduced. NOMEX占쏙옙 paper itself does not absorb water and it efficiently obstructs

external humid gas and performance is more steady and reliable after adopting vacuum pressure dipping paint. They are a new

generation environment-friendly products featuring low loss and low noise.

3. Strong overload capability
NOMEX占쏙옙 paper belongs to Grade C insulation materials, it remains good electric and mechanical performance when heat

resistance temperature reaches up to 220占쏙옙 We use it as insulation material of Grade H SG (B)transformers at l80 占쏙옙and

improve the overload capability of transformers.

4. Reliable running and easy maintenance
HV of SG (B) transformer is pie winding in the case of high voltage and foil winding in case of low voltage. After being

processed with vacuum pressure paint-dipping process, it has stronger capability of bearing abrupt short circuit. No crack

occurs when running and maintenance is not necessary. The overall running cost is low. Flexible design is not restricted by

the absence of dies. It can be designed according to any specification required by the customers. And perfect temperature

protection control system can be equipped so as to provide reliable guarantee for the safe running of transformers.

Keywords:transformer circuit,output transformer,transformer manufacturer,transformer calculations,transformers