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Contact name:Lian Huanhuan
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220 Kv 240 MVA Oil Immersed Power Transformer Earthing Transformer
Product Overview
For 220kV Oil immersed type transformer,which is substation main transformer.The grounding transformer is used to provide a path to an ungrounded system or when the system neutral is not available for some reason, for example, when a system is delta connected. It provides a low impedance path to the neutral and also limits the transient overvoltage when the ground faults occur in the system. The grounding of the system can be done in the following way
1. Elevation: Not more than 2000 meters.
2. Ambient temperature:
Max. + 50℃.
Min.: -45℃.
To be defined in details at ordering.
GB 1094.1-2003 GB 1094.2-2003
GB 1094.3-2003 GB 1094.5-2003
JB/T 5344.1-2004 J B/T 6303-2004
JB/T 8506-1996 JB/T 8636-1997
JB/T 9640-1999
Technical Parameters
| Rated capacity (kVA) | Voltage combination | Connection symbol | No -load loss (kW) | Load loss (kW) | No -load current (%) | Short -circuit impedence (%) | Cross weight(t) | |||
| HV(kV) | HV tapping range (%) | LV(kV) | ||||||||
| 31500 | 220 242 | ±2×2.5 | 6.3 6.6 10.5 | YNd11 | 28 | 128 | 0.56 | 12~14 | 40 | |
| 40000 | 32 | 149 | 0.56 | 45 | ||||||
| 50000 | 39 | 179 | 0.52 | 55 | ||||||
| 63000 | 46 | 209 | 0.52 | 65 | ||||||
| 75000 | 10.5 13.8 | 53 | 237 | 0.48 | 75 | |||||
| 90000 | 61 | 273 | 0.44 | 85 | ||||||
| 120000 | 75 | 338 | 0.44 | 110 | ||||||
| 150000 | 10.5 13.8 15.75 18 21 | 89 | 400 | 0.40 | 125 | |||||
| 160000 | 93 | 420 | 0.39 | 130 | ||||||
| 180000 | 102 | 459 | 0.36 | 145 | ||||||
| 240000 | 128 | 538 | 0.33 | 180 | ||||||
| 300000 | 15.75 18 21 | 151 | 641 | 0.30 | 210 | |||||
| 360000 | 173 | 735 | 0.30 | 240 | ||||||
| 370000 | 176 | 750 | 0.30 | 250 | ||||||
