How power transformer be manufactured, tested & delivered? (Photos tell you)
Below we are sharing photos of 15/20 MVA 46 / 6.3 KV Power Transformers, to explain how Daelim manufacture, test and deliver power transformers.
Pad-mounted Transformer
Dry-type Transformer
Oil immersed transformer
Table of Content
Power transformer standards
As project requirement, transformers are manufactured as per below standards:
IEC – 60076
ANSI C57.12.10
IEC 60137
IEC – 60214
IEC 60044.1
IEC – 60156
IEC – 60439
IEC – 60502
ASTM D 3487
IEEE 693- 2005
NEMA TR1
Keep on reading Basic Guide to Different Transformer Types
Power transformer specification
1-Type : 3 phases Power Transformer
2-Rated Power MVA 15000/20000
3-Rated Voltages( At No Load) kV/kV 46/6.3
4-Rated Frequency Hz 60
5-Type of tap changer on HV side ON-load
6-Number of taps on HV 17(±8×1.875%)
7-Insulation Level
-HV (Bil/AC) kV 250 /85
-LV (Bil/AC) kV 60/25
8-Vector Group Symbol Dyn1
9-Cooling Method ONAN/ONAF
10-Max.Winding/Oil Temperature Rises ℃ 55/50
11-Type of tank Barrel type
12-No Load Losses at rated Voltage Ration kW 20.8
13-Load Losses
-at 75 °C based 15MVA, at nominal tap kW 69.2
14-Impedence Voltage
-at 75 °C, based 15MVA / 20 MVA, at nominal tap % 8.0 / 10.67
15-No load Current at rated voltage ratio % 0.4
16-Approximate Weights
a)Total Weight kg 29200
b) Oil Weight kg 6100
c) Active part kg 14100
d) Transport Weight(without oil) kg 22000
17-Terminations(Bushings)
HV: Oil/Air Condenser Bushing yes
HV-N: Oil/Air Condenser Bushing yes
LV: Oil/Air Bushing yes
18- Manufacturing Standards ANSI C57.12.10
Keep on reading VIETNAM CUSTOMERS
Power transformer accessories and secondary line
Transformer fans
MR OLTC on load tap changer & mechanism
Secondary wiring – current transformer wiring
IP 55 control box
Explosion-proof pipe
Fiber optic temperature measurement
Power transformer testing
The FAT tests of the power transformers including below items:
1 Dielectric tests
2 Measurement of Voltage Ratio and Vector Group
3 Measurement of Winding Resistance
4 Separate-Source Power-Frequency Voltage Withstand Test
5 Measurement of bushing capacitance and Dielectric Dissipation Factor
6 Lighting Impulse Voltage Withstand Test
7 Induced Voltage Withstand and Partial Discharge Test
8 Measurement of No-load Losses and No-load Current
9 Measurement of Impedance Voltage and Load losses
10 Measurement of Zero-Sequence Impedance
11 Sealed Test
12 Temperature Rise Test
13 Measurement of Noise Level
14 Measurement of the winding frequency spectrum response curve
15 Current transformer test
16 OLTC tests
17 Polarity test
Some recording photos, we provide live broadcasts for clients.
Let’s know learn more about the AUSTRALIA CUSTOMER
Lighting impulse test
Power frequency test
SFRA Test
Power transformer delivery
When packing, our professional transformer forwarder reinforces the goods at port.
Customized power transformer
Daelim is a professional power transformer manufacturer. Power transformers are exported to the United States, Canada, Mexico, Australia, Ecuador, Chile and other North and South America regions, and many substations and mobile substations have been established.
Professional technical team and nearly 20 years of international market experience enable Daelim to customize various types of power transformers. Daelim’s transformer brand is Daelim Belefic, which is already quite influential in North and South America.
If you have any related questions, please tell Daelim without reservation, and the Dalelim team will give you the best transformer solution.
