Low Loss Oil Immersed Type Transformer 11kV - 3000kVA Energy Saving Low Noise

Basic Information
Place of Origin: China
Brand Name: Pearl Electric
Certification: KEMA, CE, CCC, ISO9001
Model Number: PEO-S, S9~13
Minimum Order Quantity: 1 unit
Price: USD/RMB
Packaging Details: Seaworthy wooden packing
Delivery Time: 35~50days ex-work
Payment Terms: T/T, L/C
Supply Ability: 8000 units per year
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Capacity: 3000kVA Or Customized Rated H. V.: 11kv Or Customized
Rated L. V.: 0.433kv Or Customized Vector Group: Dyn11 Or Customized
Impedence: 6% Or Customized Cooling: ONAN/ONAF Or Customized

11kV - 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.

 

 

Current

 

Power transformers shall have overloading capabilities in accordance with IEC 60076-7 Table 4. Refer to 5.2 Test by the Manufacturer for Type Test requirements

 

Voltage

 

Maximum continuous voltage on any tapping (Overflux)

 

Over excitation shall be limited to 5% at full load and 10% at no-load respectively. The maximum flux density shall be limited to 1.72 T at 50Hz. Taking the frequency variation as specified in

 

 Network frequency into account the flux density shall not exceed 1.79 T at 48Hz

 

Maximum temporary over voltage

 

Under switching conditions, the power frequency line voltage may exceed the maximum system voltage (Um). The transformers shall be designed to withstand the following overvoltages without damage.

 

• 1.00 Um for continuous; 

• 1,05 Um for 5 min; 

• 1,25 Um for 5 s;

• 1,5 Um for 1 s; 

• 1,7 Um for 0,25 s.

 

 

 

No. Items Unit Item 1
I Basic Information     
1.01 Type Designation   PEO-S-KVA/HV/LV
1.02 Applicable Standards   IEC 60076
1.03 Manufacturer   Pearl Electric
1.04 Country of Origin   China
II Pearl Electric Performance     
2.01 Rated Power kVA 3000
2.02 HV KV 11
2.03 LV KV 0.433
2.04 Frequency Hz 50
2.05 Number of phase   Three
2.06 Insullation Class   Class A
2.07 Cooling Method   ONAN
2.08 Tapping Ranging   ±2*2.5% on HV side
2.09 Vector Group   Dyn11
2.10 Noise level dB 60
2.11 Impedance % 4.75
2.12 No-load loss W 3200
2.13 Load Loss (@75℃) W 26500
2.14 Max. Ambient Temperature 40℃
2.15 Top oil temperature rise K 60
2.16 Winding temperature rise K 65
2.17 Impulse Withstand Voltage (HV/LV)
kV
75/0
2.18 Power Frequency Withstand Voltage (HV/LV)
kV
28/3
2.19 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 Main Insulation Materials   Mineral Oil
3.04 Tap-changer pcs Off-load tap-changer
3.05 Pressure relief valve pcs Yes,with alarm and trip
3.06 Gas relay pcs Yes,with alarm and trip
3.07 HV&LV Cable Box & Extension Busbar pcs Yes
3.08 Bushing pcs Porcelain Bushing
3.09 Oil thermometer pcs Yes,with alarm and trip
3.10 Terminal box pcs Yes
3.11 Oil-level indicator pcs Yes
3.12 Oil Conservator pcs Hermetiacally-sealed tank
3.13 De-hydrating breather pcs N/A
3.14 Cooling device pcs Corrugated fins
3.15 Current Transformer pcs N/A
3.16 Lightning Arrester pcs N/A
3.17 Transformer wheel pcs Yes
IV OTHERS     
4.01 Dimensions (L*W*H) mm 2180*2310*2020
4.02 Total mass(with oil) kg 6310
4.03 Colour   RAL7035

 

 

Low Loss Oil Immersed Type Transformer 11kV - 3000kVA Energy Saving Low Noise

Contact Details
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Phone Number : 86-020-22626603

WhatsApp : +008618826241798