Below are the detailed specifications for the transformers we require:

Rated Power of Windings (MVA)

HV: 25, 31.5, 40

LV: 25, 31.5, 40

Rated Voltage (kV)

HV: 115

LV: 16.5, 22

Voltage Regulation on the HV Side: ±16% at minimum ±11 steps

Frequency: 50 Hz

Layout and Connection Group: YNd11

Short Circuit Voltage (% HV-LV): 18

Cooling System: ONAN (with additional forced cooling system)

No-load Current (%): 0.1

No-load Losses (kW)

For 25 MVA: 10

For 31.5 MVA: 11.5

For 40 MVA: 13

Exceeding these loss values and the partial discharge (PD) level will result in contractual penalties as per the agreement.

Load Losses (kW)

For 25 MVA: 140

For 31.5 MVA: 150

For 40 MVA: 185

Partial Discharge Level: Less then 150 PC

Partial Discharge Level of HV and HV-LV Bushing Insulators: Less then 10 PC

Required Sound Power Level (dB(A))

For 25 MVA: 76 (ONAN); 79 (ONAF)

For 31.5 MVA: 77 (ONAN); 80 (ONAF)

For 40 MVA: 79 (ONAN); 82 (ONAF)
Measurement required according to the standard at rated voltage and rated current.

We require the following quantities and specifications for each transformer type:

25 MVA:

110/15: 112 units

110/20: 4 units

31.5 MVA:

110/15: 4 units

110/20: 2 units

40 MVA:

110/15: 5 units

25/16/16 MVA:

110/15/6: 1 unit

31.5/6.5/25 MVA:

110/30/15: 1 unit

Additionally, could you please provide information regarding your typical lead time for the manufacturing and delivery of these products?

The deadline for submitting the quote is November 9, 2024. The full technical specification is attached for your reference.

We appreciate your time and consideration of this RFQ and look forward to the possibility of working together. Please do not hesitate to reach out if you have any questions or require additional information.