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S20-M.RL series transformers
Source: Leapingsoar Electric 2024-05-10 128 Secondary browsing

Product Overview
The S20 series oil immersed three-dimensional coil iron core transformer iron core is assembled from three identical frames. When silicon steel is longitudinally cut, it can achieve nearly 100% utilization through nesting, and there is less excess material at the edges and corners. Silicon steel sheets are tightly wound without seams, with a high filling coefficient of the iron core and low magnetic resistance. Continuous winding can ensure that the magnetic direction of silicon steel is consistent with the actual magnetic flux direction. The length of the three-phase magnetic circuit of the three-dimensional coil iron core is consistent, which can achieve three-phase magnetic circuit balance, significantly reduce no-load loss and no-load current, and reduce noise by more than 10dB. The product is widely used.
Application environmental conditions

Number

Name

unit


Demand value

1

System nominal voltage

kV

10

2

Maximum operating voltage

kV

12

3

System neutral grounding method

 

Ungrounded

4

Rated frequency

Hz

50

5

Pollution level

 

Unified creepage distance meets on-site pollution level e

6

System short-circuit current level (high voltage side)

kA

20

7

ambient temperature

Maximum daily temperature

℃

45

Minimum daily temperature

-25

Maximum daily temperature difference

K

25

8

altitude

m

≤1000

9

Solar radiation intensity

W∕cm2

0.1

10

Maximum ice thickness

mm

20

11

Ability to withstand earthquakes

Ground horizontal acceleration

ms-2

3

Three cycle safety factor of sinusoidal resonance

 

≥1.67

12

Installation site (indoor/outdoor)

 

(Provided by the customer)

Referenced standards
Standardized Design Test Plan for 10kV Oil Immersed Three Dimensional Coiled Iron Core Distribution Transformer
GB/T 1094.1 Power Transformers Part 1: General
GB/T 1094.2 Power Transformers Part 2: Temperature Rise of Liquid Immersed Transformers
GB/T 1094.3 Power Transformers Part 3: Insulation Level, Insulation Test, and External Insulation Air Gap
GB/T 1094.4 Power Transformers Part 4: Guidelines for Lightning Impulse and Switching Impulse Testing of Power Transformers and Reactors
GB/T 1094.5 Power Transformers Part 5: Ability to withstand short circuits
GB/T 6451 Technical parameters and requirements for oil immersed power transformers