33kv oil immersed electrical earthing transformer 750kva

• Rated Power: 750 kVA
• Impedance Voltage (Short Circuit): 4.4% or 445 V / 187.5 A
• Short Circuit Duration: Max 3 s
• Connection Symbol: ZNyn11/d
• Stabilizing Winding: Yes (ZNyn11/d)

General Requirements:

• Frequency: 60 Hz
• Duty: Continuous
• Type: Station Transformer

High Voltage Side:

• Rated Voltage: 33,000 V
• Rated Neutral Current: 5745 / 2100 A
• Max. Duration of Earth Fault: 5 s / 30 s
• Zero-Sequence Impedance: 10 Ω/ph
• Isolation Level: AC: 70 kV, LI: 170 kV / AC: 3 kV / AC: 13 kV

Low Voltage Side:

• Rated Voltage: 234 V
• Rated Current: 1875 A

Port:Any Port in China

Transport Package:Wooden Case

HS Code:85042100

Production Capacity:5000mva/Year

Product Description

Product overview
General
We offers a complete range of distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, and commercial applications. Liquid-filled transformers are manufactured in accordance with the most demanding industry and international standards. Compliance with important standards, from IEC to VDE, is a matter of course, just as much as the exclusive use of high-quality materials. Qualified employees implement the demanding standards in daily practice.

Standard Features

1,Product Range:15kVA-10000kVA, up to 44kV
2, System voltage: max. 36 kVA 200 BIL
3,Coolers: corrugated wall or radiator
4,Oil preservation: hermetically sealed or conservator/free breathing
5, Tap changer: off-circuit or on-load
6, Cooling medium: mineral oil, Midel
7, Steel type core clamping system
8, High voltage (HV) multilayer winding
9, Low voltage (LV) foil winding or layer winding
10, Winding materials aluminium or copper
11,High temperature class transformers
12,Low noise solution
13,Efficient transformers with reduced losses
14, Liquid-filled
15,Used in special conditions
16,Sophisticated facilities
17, Usage of wooden case
18, 3D package for drawings
19, Special test like Zero Sequence Impendence test
20, Cooling: ONAN, ONAN/ONAF, KFAF, KFW

++++Service condition
a) Suitable for indoor or outdoor application
b)Air temperature: Maximum temperature: +40ºC; Minimum temperature:-30ºC
c) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
d) Altitude above sea level: Maximum installation altitude: 2000m.
e)Max wind speed:35M/s
f) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
g) No frequent violent shake
Note: * Beyond those services condition should enquiry to manufacturer technical dept during order
++++ Tests
1,   Voltage ratio. Polarity and phase relationship test on each tapping
2,   Resistance of all windings
3,  No-load current and no-load losses measurement
4,   Load losses measurement at rated current and frequency
5,   Impedance voltage measurement
6,   Induced over-voltage and separate source voltage withstand tests
7,  Impulse voltage withstand test.
8,   Noise level test
9,   Oil leakage test
10, Overload test at 150% rated current for one hour after temperature rise test and hot resistance measurement of (HV - LV)
 

 
Pckaging&Shipping
 Long time shipment & Seaworthy wooden box
Wooden package optional:
1,choose one unit/ wooden box
2,choose 2unit/ wooden box to save cost