20kV - 30kVA Dry Type Transformer Low Loss SC ( B ) 9 - 15 Two Winding

Basic Information
Place of Origin: China
Brand Name: Pearl Electric
Certification: KEMA, CE, CCC, ISO9001
Model Number: PEC-S, SC(B) 9-15
Minimum Order Quantity: 1 unit
Price: USD/RMB
Packaging Details: Seaworthy wooden packing
Delivery Time: 30days-50days ex-work
Payment Terms: T/T, L/C
Supply Ability: 9000 units per year
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 20kV - 30kVA Cast Resin Dry Type Transformer , Three Phases , Two Winding , Power Distribution​




1. Stable electrical performance:


The product combined with load characteristics and grid voltage fluctuation, atmospheric overvoltage situation, according to the rectifier transformer load conditions determine reasonable and reliable insulation level and insulation model, confiscated products to ensure reliable and stable electrical performance. Product environmental safety factor ≥1.67.


2. high degree of dynamic stability:


The product winding has high mechanical strength, has a strong anti-burst capability to meet the harsh load environment. In the design, manufacturing process to better eliminate the transformer magnetic flux leakage caused by the abnormal transport or instability may be the source of instability. With high dynamic stability, high resistance, it has the capacity of the power transformer impedance of 30% higher, effective protection of rectifier components.


3. good thermal stability:


Advanced product design, strict control of the product hot spots and the hottest temperature rise, and leave sufficient temperature margin, if necessary, can be added in the coil axial oil path, according to the coil Load loss value of the cooling method and reasonable distribution of oil flow to achieve cooling effect, the main temperature indicators are at least 5 ºC lower than the national standard. Coil, copper wire used lead, current density selection is lower.


4. strong overload capacity:


the product has strong overload capacity and over-voltage capability, rated load conditions in the long-term safe operation, over-voltage conditions in 110% of the long-term safe operation under full load (ambient temperature 40 ºC); Transformer and motor connected terminals can withstand 1.5 times the rated current, duration 5S. Product design, manufacturing fully consider the load characteristics, from the temperature rise, insulation properties and accessories to meet all aspects of the choice of overload requirements.


5. superior performance indicators:


No-load current design, manufacturing value is lower than the same capacity transformers based on the provisions of the full user economy and reliability.


6. energy-saving effect is obvious, low noise (<65dB).

Cast Resin Dry Type Transformer, Low Noise, Low Loss and Low Partial Discharge.


No. Items Unit  
I Basic Information       
1 Rated Voltage ratio kV 20kV / 0.433 kV
1.01 Rated Capacity kVA 30
1.02 Applicable Standards   IEC 60076
1.03 Manufacturer   Pearl Electric
1.04 Country of Origin   China
II Electric Performance       
2.06 Insullation Class   Class H
2.07 Temperature Rise (@40℃ ambient temperature) K 125K
2.08 Cooling Method   AN
2.09 Tapping Ranging   ±2*2.5%
2.1 Vector Group   Dyn11
2.11 Noise level dB 48
2.12 Impedance % 4
2.13 No-load loss W 190
2.14 Load Loss (@120℃) W 710
2.15 Local Partial discharge pC <10PC
2.16 Impulse Withstand Voltage (HV/LV) kV 75/0
2.17 Power Frequency Withstand Voltage
kV 28/3
2.18 Rated Duration of Short Circuit s 2
III Materials & Accessories       
3.01 Core Materials   Silicon Steel Sheet
3.02 Winding Materials   Copper conductor/foil
3.03 Insulation methods   HV vacuum cast / LV impregnant
3.04 Main Insulation Materials   Epoxy Resin
3.05 Tap-changer pcs Off-load tap-changer
3.06 Sensor for Temperature Alarm and Trip pcs Yes, contact provided
3.07 Protective Enclosure pcs IP00

 Loading guide for dry-type power transformers

1 Scope
This part of IEC 60076 is applicable to dry-type transformers according to the scope of
IEC 60076-11. It provides the means to estimate ageing rate and consumption of lifetime of
the transformer insulation as a function of the operating temperature, time and the loading of
the transformer.
NOTE For special applications such as wind turbine application transformers, furnace transformers, welding
machine transformers, and others, the manufacturer should be consulted regarding the particular loading profile.

2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60076-11, Power transformers – Part 11: Dry-type transformers
IEC 60216-1, Electrical insulating materials – Properties of thermal endurance –
Part 1: Ageing procedures and evaluation of test results
IEC 61378-1:1997, Convertor transformers – Part 1: Transformers for industrial applications


3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1long-time emergency loading
loading resulting from the prolonged outage of some system elements that will not be
reconnected before the transformer reaches a new and higher steady state temperature


3.2short-time emergency loading
unusually heavy loading of a transient nature (less than one time constant of the coil) due to
the occurrence of one or more unlikely events which seriously disturb normal system loading


if not specifically defined, “hot-spot” means the hottest-spot of the winding


3.4relative thermal ageing rate
for a given hot-spot temperature, the rate at which transformer insulation ageing is reduced or
accelerated compared with the ageing rate at a reference hot-spot temperature

 Applied Standard

GB/T10228 , GB1094.11 , IEC60076-11 , DIN42523
 20kV - 30kVA Dry Type Transformer Low Loss SC ( B ) 9 - 15 Two Winding

Contact Details

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