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Anti Short Circuit Oil Cooled Transformers Energy Saving 20kV - 500kVA

Categories Oil Immersed Transformer
Brand Name: Pearl Electric Co.,Ltd.
Model Number: PEO-S, S9~13
Certification: KEMA, CE, CCC, ISO9001
Place of Origin: China
MOQ: 1 unit
Price: USD/RMB
Payment Terms: T/T, L/C
Supply Ability: 8000 units per year
Delivery Time: 35~50days ex-work
Packaging Details: Seaworthy wooden packing
Capacity: 30kVA~10MvA or Customized
Rated H. V.: 20kv or Customized
Rated L. V.: 0.4kv or Customized
Vector Group: Dyn11 or Customized
Impedence: 4%-6% or Customized
Cooling: ONAN/ONAF or Customized
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Anti Short Circuit Oil Cooled Transformers Energy Saving 20kV - 500kVA

20kV Oil - Immersed Transformer, Three Phases, Two Winding, Power Distribution


Introduction


Oil-immersed type transformer features low noise, low loss, rational structure, high quality material, scientific design, strict production technology and advanced test method. The product also has the following additional advantages:


1. High mechanic strength, great anti-short circuit capability, excellent anti-lightning impulse capability and high reliability. All these performance indexes rank first in the industry in China.


2. Excellent overload capability, capable of continuously working under 110% rated load.


3. Low loss, energy-saving, economic and maintenance free.


4. Nice appearance, small size, less installation space occupation and low engineering cost.


5. Each performance index and technical specification excels that specified in China GB, international IEC and industrial standards.


6. Hermetically sealed corrugated tank structure is adopted, thus to effectively prevent air corrosion to the oil and prolong service lifetime of the transformer.


Accessories:


The transformer is equipped with HV & LV bushings, oil drain valve, earthing bolt, lifting board, rating plate, pressure relief valve and other accessories. Transformers of over 800KVA power are equipped with signaling thermometer and gas relay.


Main measures for preventing oil leakage:


1. Superior large-width steel plate is selected as material and no vertical joins on the tank wall.


2. All sealing flanges are products of finish machining, thus to ensure components' flatness and cleanness. Therefore, the sealing parts have very long service lifetime.


3. Dual-sealing structure is adopted for large and medium size tank, thus to further ensure tank rim from oil leakage.


4. Advanced technology is adopted during protective welding, thus fully ensuring the welding quality. X-ray leakage detection is carried out for each welding seam.


5. All main components and parts (for example, bushing, radiator, sealing parts, butterfly valve and flap door) are purchased from the famous manufacturers recognized and certified by authority.


6. Superior sealing part and nitrile rubber are adopted for sealing process. The nitrile rubber is a type of oil-resistant high-elasticity product that has a reputation as "sealing expert".


Physical arrangement


Bushings, cooler banks, conservator and maximum dimensions


Unless otherwise specified, the physical arrangement shall be such that:


a. separately mounted cooler banks, if provided, shall be located to allow free withdrawal of the transformer in the direction of the minor axis; and


b. the maximum overall dimensions (excluding surge arresters) for power transformers with a highest voltage rating of 132 kV and below and ratings up to and including 160 MVA shall be as detailed in Table 3.


Table 3 — Maximum overall dimensions for two winding transformers


HV rating, Un

(kV)

Height

(mm)

Length

(mm)

Width

(mm)

132

88

66

44

5 500

5 500

5 500

5 500

7 800

6 800

6 800

6 400

5 000

5 000

5 000

5 000

1) The HV bushings should as far as possible be symmetrically arranged about the overall transverse centre line of the transformer
2) The above dimensions exclude surge arresters and their mounting brackets

NOTE:

The following row is only applicable to auto transformers

HV rating, Un

(kV)

Height

(mm)

Length

(mm)

Width

(mm)


Specifications:
Rated H.V.:20 (22)kV, ±2×2.5%
Vector GroupDyn11/Yyn0
Rated L.V.:0.4kV
Capacity:30~2500
No-load Loss:0.13~3.20kW
Load Loss0.60~21.5kW
No-load Current:0.6~2.3%
Impedance Voltage:4/4.5/5.5%
Tap-changingOn-load Tap-changing
Cooling Method:ONAN/ONAF
Reference StandardsIEC60076
Notes: The above specifications may be customized according to customer's requirement.
Features & Advantages
1. Low loss, low noise and high reliability.
2. Excellent dynamic thermal stability and high over-load capacity.
3. Simulation analysis was carried out for the core mould design, thus to greatly reduce noise level. Simulated lightning impulse wave process was carried out for HV winding mould design, thus to greatly improve product's anti-lightning impulse capability.

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