Three-Phase Oil-Immersed Small Substation Transformer
Product Introduction
Three-phase oil-immersed small substation transformers are designed for power distribution systems and are an indispensable and important part of power infrastructure. As a key link in the power generation, transmission and distribution system, substations undertake the important task of converting high voltage to low voltage (or vice versa), and also perform a variety of other key functions. Through substations, electricity can be transmitted at different voltage levels between power stations and users, ensuring efficient and safe supply of electricity.
During the power transmission process, the current may pass through multiple substations, each of which may operate at different voltage levels to meet the power demand of different regions. Three-phase oil-immersed small substation transformers play a vital role in this process. They can effectively convert high-voltage transmission voltage to a voltage suitable for low-voltage distribution, or connect two different transmission voltage levels. This flexibility enables substations to allocate power according to actual needs, ensuring the stability and reliability of the power system.
The design of three-phase oil-immersed small substation transformers takes into account efficient heat dissipation and excellent insulation characteristics, and can operate safely under various environmental conditions. Their compact structure and convenient maintenance make them widely used in urban and rural power distribution networks. Through continuous technological innovation and optimization, these transformers not only improve the efficiency of power transmission, but also provide users with more stable and reliable power services, promoting the sustainable development of the power industry.
Standard Features
●Insulating mineral oil
●60/50 Hertz operation
●Externally operated de-energized tap changer with(2) 2.5% full capacity taps above and below nominal
●65°C average winding rise
●HV and LV bushings
●HV and LV flange connections
●Pressure-vacuum gauge
●Liquid level gauge
●Liquid temperature gauge
●Pressure test valve
●Drain/filter valve with sampling device
●Tank lifting lugs
●Corrosion resistant nameplate
●Hydran provision (above 7.5 MVA)
Optional Accessories
●High-fire point fluid, such as silicone, hydrocarbon or vegetable fluids. (up to 10 MVA)
●55°C 55/65°C average winding rise
●Forced air cooling
●Forced air cooling with 2 stages(from 7.5 MVA and up to 15 MVA)
●Removable radiators
●Pressure relief device
●Winding temperature device
●Sudden pressure relay with or without seal in
●Devices with alarm contacts
●Top filter press valve
●HV & LV air terminal compartments
●HV lightning arresters
●Current transformers
●Neutral grounding resistor
●Special impedances
●Low losses
●Special environment (i.e: classified areas)
●Special / low sound level
●Retrofit to specific dimensions
●Non-standard loading conditions such as harmonic loading or specified K-factor
●Stainless steel removable radiators
●Galvanized steel removable radiators
●Special paint for marine ambient
●Special paint thickness
●Special colors
●CSA compliance
●Other special features upon request
Standard Design
|
No |
Name |
No |
Name |
|
1 |
HV BUSHING |
11 |
1"DRAIN VALVE WITH 3/8"SAMPLER |
|
2 |
LV BUSHING |
12 |
TAP CHANGER |
|
3 |
RADIATORS |
13 |
VACUUM PRESSURE GUAGE |
|
4 |
HANDHOLE |
14 |
LIFTING HOOK FOR COMPLETE TRANSFORMER |
|
5 |
PRESSURE RELIEF DEVICE |
15 |
CABLE CONNECTION BOX,H.V |
|
6 |
NAME PLATE |
16 |
THROAT FLANGE,L.V |
|
7 |
LIQUID LEVEL INDICATOR |
17 |
BASE WELDED TO TANK |
|
8 |
LIQUID TEMPERATURE INDICATOR |
18 |
LIFTING EYE FOR ACTIVE PART WITH TANK COVER |
|
9 |
|
19 |
GROUND PAD ON TANK WALL |
|
10 |
1"UPPER FILL VALVE |
|
|
Technical Data Sheet
Technical Data for 15/25/35KV Class Three Phase Oil-Immersed Substation Transformer
|
Rated Power |
High Voltage |
Low Voltage |
Connection Symbol |
Short Circuit |
Loss(W) |
Refernence Dimension |
Reference |
|
|
No-load Loss(W) |
On-load Loss(W) |
|||||||
|
800 |
4.16 |
208/120 |
Dyn1 |
2.7 |
980 |
9350 |
1060*1500*1780 |
2050 |
|
1000 |
1160 |
11500 |
1085*1570*1800 |
2450 |
||||
|
1250 |
1380 |
13900 |
1160*1610*1890 |
2900 |
||||
|
1600 |
1660 |
16600 |
1190*1630*1950 |
3400 |
||||
|
2000 |
2030 |
18300 |
1260*1700*2090 |
4100 |
||||
|
2500 |
2450 |
19600 |
1150*2150*2250 |
4750 |
||||
|
3000 |
3240 |
26500 |
1900*2600*2150 |
6500 |
||||
|
5000 |
4500 |
27000 |
2500*2210*3180 |
9500 |
||||
|
7500 |
7200 |
32000 |
3660*3100*5100 |
13600 |
||||
|
10000 |
8500 |
35500 |
3830*2640*2216 |
15800 |
||||
Note: The above data is only subject to our standard design, special requirement can be customized.