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Three Phase Step Up And Down Transformer 6.6 KV - 3000 KVA Two Winding

Categories Oil Immersed Transformer
Brand Name: Pearl Electric
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: 3000kVA or Customized
Rated H. V.: 6.6kv or Customized
Rated L. V.: 0.433kv or Customized
Vector Group: Dyn11 or Customized
Impedence: 6% or Customized
Cooling: ONAN/ONAF or Customized
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Three Phase Step Up And Down Transformer 6.6 KV - 3000 KVA Two Winding

6.6kV - 3000kVA , 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.

Core:


The core is manufactured with high quality cold rolled grain-oriented silicon steel of high magnetic conductivity, and 45° Mitring and steps overlapping structure is used for core production, thus to effectively reduce no-load loss and no-load current.

HV winding:


HV winding is manufactured with high quality copper conductor, adopting optimized structure to improve electric distribution. Lightning impulse wave process is carried out for calculation and analysis, thus to improve transformer's anti-lightning impulse capability.

LVwinding:


LV winding is manufactured with high quality foil conductor, so the ampere-turn balance is excellent and the transverse magnetic flux leakage is low. The anti-short circuit capability is thus greatly improved. Oil conduit is rationally designed in the windings to increase winding's heat dispersion surface, effectively reduce temperature and improve transformer's overload capability.


Insulation Structure:


The transformer adopts class-A insulation. The HV and LV windings are arranged in concentric way. Between the windings are oil-clapboard insulation structure built with paper cylinder and small oil conduit.


Tank:


The tank is jointed with high-quality steel. Rust-removing and phosphorization processes are carried out for the tank surface, then the surface is coated with FVC anti- erosion paint, thus to effectively prevent grease pollution and chemical erosion. The appearance is nice and harmonic with the environment. The whole structure is easy for installation and maintenance. It can be widely applied in outdoor environment and under harsh conditions.


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".


Ratings and operating conditions


Power


The values of rated power specified in Schedule A of an enquiry document are the continuous ratings, in MVA, at which each of the windings of the transformer can operate on all tappings at a voltage equal to the appropriate nominal system voltage, Un, without exceeding the temperature rise limits specified in this specification. (The power rating of the transformer shall be 100% throughout entire tapping range).


Where mixed-cooled transformers are specified, (see 4.21.1 Type of cooling required and ONAN rating), the naturally-cooled rating (ONAN) of each of the main windings shall be at least 0,70 pu of the rated power of these windings.ONAN70/ONAF100


If a tertiary winding is specified, this shall be capable of operating under the naturally-cooled condition at any loading up to the rated power specified in Schedule A of an enquiry document provided that the loading in the input winding does not exceed its naturally-cooled rating.


No.ItemsUnitItem 1
I Basic Information     
1.01Type Designation PEO-S-KVA/HV/LV
1.02Applicable Standards IEC 60076
1.03Manufacturer Pearl Electric
1.04Country of Origin China
II Pearl Electric Performance     
2.01Rated PowerkVA3000
2.02HVKV6.6
2.03LVKV0.433
2.04FrequencyHz50
2.05Number of phase Three
2.06Insullation Class Class A
2.07Cooling Method ONAN
2.08Tapping Ranging ±2*2.5% on HV side
2.09Vector Group Dyn11
2.10Noise leveldB60
2.11Impedance%4.75
2.12No-load lossW3200
2.13Load Loss (@75℃)W26500
2.14Max. Ambient Temperature40℃
2.15Top oil temperature riseK60
2.16Winding temperature riseK65
2.17Impulse Withstand Voltage(HV/LV)
kV
75/0
2.18Power Frequency Withstand Voltage(HV/LV)
kV
28/3
2.19Rated Duration of Short Circuits2
III Materials & Accessories     
3.01Core Materials Silicon Steel Sheet
3.02Winding Materials Copper conductor/foil
3.03Main Insulation Materials Mineral Oil
3.04Tap-changerpcsOff-load tap-changer
3.05Pressure relief valvepcsYes,with alarm and trip
3.06Gas relaypcsYes,with alarm and trip
3.07HV&LV Cable Box & Extension BusbarpcsYes
3.08BushingpcsPorcelain Bushing
3.09Oil thermometerpcsYes,with alarm and trip
3.10Terminal boxpcsYes
3.11Oil-level indicatorpcsYes
3.12Oil ConservatorpcsHermetiacally-sealed tank
3.13De-hydrating breatherpcsN/A
3.14Cooling devicepcsCorrugated fins
3.15Current TransformerpcsN/A
3.16Lightning ArresterpcsN/A
3.17Transformer wheelpcsYes
IV OTHERS     
4.01Dimensions (L*W*H)mm2180*2310*2020
4.02Total mass(with oil)kg6310
4.03Colour RAL7035

Quality Three Phase Step Up And Down Transformer 6.6 KV - 3000 KVA Two Winding for sale
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