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On load tap changer (OLTC) is a type of transformer that can complete tap voltage switching during load operation. It can adjust the tap position of the transformer to maintain voltage stability and ensure power supply quality when the system voltage fluctuates or the user load changes.
| On-load Tap Transformer Parameters |
| Rated capacity (kVA) | High Voltage (kV) | HV tapping range (%) | Low-voltage(kv) | Connection Group symbol | No-load loss (W) | Load loss (W) | No-load current (%) | Short -circuit impedance (%) |
| 160（50） | 10/10.5/11 | +/-5 |
0.4 |
Dynll YynO | 400（170） | 2585（870） |
1.6（0.9） | |
| 200（63） |
480（200） | 3060（1040） | 1.5（0.9） | |||||
| 250（80） |
560（250） |
3600（1250） |
1.4（0.7） | 4.0（4.0） | ||||
| 315（100） |
670（290） |
4320（1500） |
1.4（0.7） |
|||||
| 400（125） |
800（340） |
5220（1800） |
1.3（0.6） | |||||
| 500（160） | 960（400） |
6210（2200） |
1.2（0.6） | |||||
| 630（200） | 1200（470） |
7650（2600） |
1.1（0.5） | 4.5（4.0） | ||||
| For more questions about transformer parameters, please contact customer service | ||||||||
| Advantages of On Load Transformers |
1.Non power outage voltage regulation: This is the most core advantage, which can adjust the tap during load operation, avoiding the inconvenience and losses caused by power outage operations.
2.Improving voltage quality: able to quickly respond to load changes, automatically or manually adjust the tap, effectively stabilize the output voltage, and reduce voltage fluctuations.
3.Improving power supply reliability: For places with continuous production processes and high requirements for voltage stability, such as precision electronics and data centers, it can significantly improve power supply reliability.
4.Optimizing power grid operation: By using reverse voltage regulation (boosting during peak hours and reducing during off peak hours), the efficiency of power grid operation can be optimized and reactive power losses can be reduced.
| Application scenarios of on load transformers |
1.Areas with large voltage fluctuations: regions with unstable supply voltage and frequent load changes that require frequent voltage adjustments to ensure quality.
2.Places with high requirements for power continuity, such as precision electronic production workshops, data centers, hospitals, etc., may experience equipment damage or production interruptions due to voltage fluctuations.
3.Large industrial users: Industrial enterprises with high impact loads (such as electric arc furnaces and steel mills) can cause severe voltage fluctuations, and OLTC can adjust in real time to ensure power supply quality.
4.Terminal area of the power grid: The terminal area of the power grid with long lines and large load changes has significant voltage fluctuations, and OLTC helps stabilize the voltage.
5.Large transformers: OLTC is usually used, while small distribution transformers often use non excited voltage regulating transformers.
| production equipment |
CLHT has a super large modern industrial plant of 80000 square meters, 80 sophisticated production lines, more than 300 sets of imported production and testing equipment, and total assets of 205 million yuan. Three major production bases have been established successively in Henan, Hebei, and Jiangsu, introducing more than 20 industry backbones with an annual production capacity of over 5000 units and an output value of about 2 billion yuan.
