SC(B)11 type epoxy resin cast dry-type transformerDetailed product description：

SC (B) 11 epoxy resin cast dry-type transformer can be used as a replacement product for oil immersed distribution transformers, and is the most energy-efficient dry-type transformer of all kinds. It is particularly suitable for important places such as urban power grids, high-rise buildings, business centers, theaters, hospitals, hotels, tunnels, subways, underground power stations, laboratories, stations, docks, airports, and combination substations.

Product Features
SC (B) 11 is the first domestically produced low-noise and low loss resin wound coil dry-type transformer with a product model certificate. Due to advanced design, high-quality materials, scientific formulas, strict processes, and high standards of testing, the product has the following characteristics:
1. High voltage windings are made of copper wire, low-voltage windings are made of copper wire or copper foil, filled and wrapped with glass fiber felt, and poured with unfilled epoxy resin in a vacuum state. After curing, it forms a sturdy cylindrical whole with high mechanical strength, low partial discharge, and high reliability.
2. Flame retardant, explosion-proof, and non polluting to the environment. The insulation materials such as glass fiber used for winding coils have self extinguishing properties and will not generate arcs due to short circuits. Under high heat, the resin will not produce toxic or harmful gases.
3. The coil does not absorb moisture, and the iron core clamp has a special anti-corrosion protection layer, which can operate in 100% relative humidity and other harsh environments. Intermittent operation does not require dehumidification treatment.
4. High resistance to short circuits and lightning strikes.
5. The resin layer on the inner and outer sides of the coil is thin and has good heat dissipation performance. The cooling method generally adopts natural air cooling (AN). For transformers of any protection level, an air cooling system (AF) can be configured to improve short-term overload capacity and ensure safe operation.
6. Low loss, good energy-saving effect, economical operation, and maintenance free.
7. Small size, light weight, small footprint, low installation cost, no need to consider oil drainage tanks, fire prevention and firefighting facilities, and backup power sources.
8. Due to the absence of fire extinguishing or explosion hazards, it can be dispersed and installed in the load center, fully close to the power consumption point, thereby reducing line costs and saving expensive low-voltage facility costs.
Shell protection device
The shell material is made of stainless steel or aluminum alloy. The protection level reaches IP20 and IP23. The IP20 casing can prevent solid foreign objects with a diameter greater than 12mm from entering, providing further safety protection for the transformer. The IP23 casing also prevents water droplets from entering within 60 degrees of the vertical line, making it suitable for outdoor operation.
Note: The IP23 casing will reduce the cooling capacity of the transformer, with a decrease of about 5% for small capacity and about 10% for large capacity.
Temperature control, temperature display
The temperature control system consists of a temperature controller and PTC temperature measuring elements installed at the top of the low-voltage winding, which is the hottest point of the product, to measure and control the temperature of the transformer. If the temperature of the transformer winding is too high due to overload operation or fault, the temperature controller will send an alarm signal, and it will trip automatically when the temperature exceeds the safe value. When using forced air cooling, the temperature controller determines the operation or switching of the cooling fan based on the temperature of the winding.
The temperature display system directly displays the hot spot temperature of the winding during the operation of the transformer and can be used in conjunction with the temperature control system.
The temperature control and temperature display system can be installed at a certain distance from the transformer body, and the lengths of the temperature measuring element leads are:
Temperature control:<20m
Temperature display:<10m (two-wire system)
<100m (two-wire system with compensating wire)

Performance parameters of SC (B) 11 resin insulated dry-type transformer

Rated capacity KVA	Winding connection group label	Voltage combination			no-load current %	No-load loss W	load loss （120℃）W	impedance voltage %	noise level （db）
		High voltage KV	High voltage tap range%	Low voltage KV
thirty	Yyn0 or Dyn11	six six point three six point six ten ten point five eleven	± 5% or ±2× 2.5%	zero point four	two point seven two	one hundred and seventy-five	six hundred and seventy	four	forty-four
fifty					two point three eight	two hundred and forty-five	nine hundred and fifty		forty-four
eighty					two point two one	three hundred and thirty-five	one thousand three hundred and ten		forty-five
one hundred					two point zero four	three hundred and sixty	one thousand and five hundred		forty-five
one hundred and twenty-five					one point eight six	four hundred and twenty-five	one thousand seven hundred and fifty-five		forty-eight
one hundred and sixty					one point eight seven	four hundred and ninety-five	two thousand and twenty		forty-eight
two hundred					one point seven zero	five hundred and sixty-five	two thousand and four hundred		forty-eight
two hundred and fifty					one point seven zero	six hundred and fifty	two thousand six hundred and twenty		forty-eight
three hundred and fifteen					one point five three	seven hundred and ninety-five	three thousand and three hundred		fifty
four hundred					one point five three	eight hundred and eighty-five	three thousand seven hundred and ninety		fifty
five hundred					one point five three	one thousand and fifty	four thousand six hundred and forty		fifty-two
six hundred and thirty					one point three six	one thousand two hundred and fifteen	five thousand five hundred and eighty-five		fifty-two
six hundred and thirty					one point three six	one thousand one hundred and seventy	five thousand six hundred and sixty-five	six	fifty-two
eight hundred					one point three six	one thousand three hundred and seventy	six thousand six hundred and ten		fifty-four
one thousand					one point one nine	one thousand and six hundred	seven thousand seven hundred and twenty		fifty-four
one thousand two hundred and fifty					one point one nine	one thousand eight hundred and eighty-five	nine thousand two hundred and ten		fifty-five
one thousand and six hundred					one point one nine	two thousand two hundred and ten	eleven thousand one hundred and fifty		fifty-six
two thousand					one point zero two	two thousand nine hundred and ninety	thirteen thousand seven hundred and thirty		fifty-six
two thousand and five hundred					one point zero two	three thousand and six hundred	one thousand six hundred and thirty-two		sixty