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500/132kV 250mva single phase Auto transformer
Type:Oil immersed with On load Tap-changer,1 phase ;
Installation :Outdoor in Switchyard
Rated Power:
Primary / Secondary:250MVA
Tertiary:36MVA
Rated Voltage: HV Winding 500kv
LV Winding 132kv
Tertiary Winding 23kv
Rated Frequency: 50HZ
Weight :
Dimension：
Type:Oil immersed with On load Tap-changer,1 phase ;
Installation :Outdoor in Switchyard
Rated Power:
Primary / Secondary:250MVA
Tertiary:36MVA
Rated Voltage: HV Winding 500kv
LV Winding 132kv
Tertiary Winding 23kv
Rated Frequency: 50HZ
Weight :
Dimension：
Single phase 525/136.6/23KV 250mva AUTO TRANSFORMER 500/132kV Auto transformer SINGLE PHASE 525/v3/136.6/V3/23KV, 250 MVA AUTO TRANSFORMER
Single phase 525/136.6/23KV 250AUTO TRANSFORMER
| Sr. No. | DESCRIPTION | UNIT | SPECIFICATION REQUIREMENT |
| 1 | Manufacturer | - | CHINA |
| Country | CHINA | ||
| - Class | - | A | |
| - Type | Oil immersed with On load Tap-changer, single phase | ||
| 2 | Installation | Outdoor in Switchyard | |
| 3 | Rated Power | ||
| ‘ Primary / Secondary | MVA | 250 | |
| - Tertiary | MVA | 36 | |
| 4 | Rated Voltage | ||
| - HV Winding | kV | 525/v3 | |
| - LV Winding | kV | 136.6/v3 | |
| - Tertiary Winding | kV | 23kv | |
| 5 | Rated frequency | Hz | 50 |
| 6 | 3 Phase Winding Connections | - | YN,a0,d11 |
| (Group of Vectors IEC 76) | |||
| 7 | Cooling | - | ONAN/ |
| ONAF | |||
| 8 | Tap Changer : | ||
| - Make | MR GERMANY | ||
| - Type | Oil / Vacuum | ||
| - On-Load Tap Changer Location | HV Neutral side | ||
| - Regulating range | % | +5 to -15 in 17 steps | |
| - Rating | Rated power on all taps | ||
| 9 | Rated current at ONAF rated power and rated voltage tap: | ||
| - HV Winding | A | 289 | |
| - LV Winding | A | 722 | |
| - Tertiary Winding | A | 630 | |
| 10 | No- load current through: | At 100% | |
| - HV Winding | A | 1.15(max) | |
| - LV Winding | A | 2.88(max) | |
| - Tertiary Winding | A | 2.5(max) | |
| 11 | Short Circuit Impedance | Base: Rated voltage and 250 MVA |
|
| 12 | Direct Impedance at nominal Voltage tap: | ||
| - HV / LV | % | 15 | |
| - HV / TV | % | 50 | |
| - LV / TV | % | 33 | |
| 13 | Direct Impedance at minimum voltage tap: | ||
| % | ≤ 15 | ||
| 14 | Direct Impedance at maximum voltage tap: | ||
| - HV/LV | % | 15 | |
| 15 | Zero sequence impedance at nominal voltage tap | % | 10.47 |
| - HV / LV | % | - | |
| - HV / TV | % | - | |
| - LV / TV | % | - | |
| 16 | Tolerance to be applied to the short circuit impedance, in terms of % of the guaranteed values on: | ||
| - Nominal voltage tap | % | ±5 | |
| - Other taps | % | ±15 | |
| 17 | Transformer capacity to withstand external short circuits: | ||
| Short Circuit Duration | s | 2 |
