Hey there! As a supplier of three - phase oil - immersed transformers, I often get asked about what information is included on the nameplate of these transformers. Well, let me break it down for you.
First off, the nameplate is like the ID card of a three - phase oil - immersed transformer. It provides a whole bunch of crucial details that help users understand the transformer's capabilities, specifications, and how to use it safely.
Basic Identification Information
The very first thing you'll see on the nameplate is the manufacturer's name and logo. This is important because it tells you who made the transformer. When you're dealing with something as important as a transformer, you want to know you're getting a product from a reliable source. For example, if you're looking at one of our transformers, you'll see our well - recognized logo right there on the nameplate.
Next up is the model number. Think of the model number as a unique code for the transformer. It helps the manufacturer keep track of different types of transformers they've produced. It also allows customers to easily refer to a specific transformer when they have questions or need spare parts. Each model number might represent different features, sizes, or performance levels of the transformer.
Electrical Specifications
One of the most critical parts of the nameplate is the electrical specifications. Let's start with the rated power. This is usually given in kilovolt - amperes (kVA). The rated power tells you how much electrical power the transformer can handle continuously without overheating. For instance, we have transformers like the 30 - 2500kVA/10kV Low - Loss Oil Immersed Transformer and the 3150 - 20000kVA/35kV Oil Immersed Power Transformer. The numbers in the name clearly show their rated power and the voltage levels they're designed for.
The rated voltage is another key specification. It indicates the voltage at which the transformer is designed to operate. There are usually two values: the primary voltage and the secondary voltage. The primary voltage is the input voltage, and the secondary voltage is the output voltage. For example, in a 10kV/400V transformer, 10kV is the primary voltage, and 400V is the secondary voltage. This information is crucial for connecting the transformer correctly to the electrical system.
The frequency is also specified on the nameplate. In most parts of the world, the standard frequency is either 50Hz or 60Hz. Using a transformer at the wrong frequency can lead to inefficient operation or even damage the transformer.
Winding Information
The nameplate also provides details about the transformer's windings. You'll find information about the number of phases. Since we're talking about three - phase oil - immersed transformers, it'll clearly state "Three - Phase". The winding connection type is also important. Common connection types include delta (Δ) and star (Y). The connection type affects the voltage and current relationships between the primary and secondary windings.
The impedance voltage is another parameter related to the windings. It's expressed as a percentage and indicates the voltage drop across the transformer's windings when it's carrying rated current. A lower impedance voltage means less voltage drop and better voltage regulation.
Oil - Related Information
Since these are oil - immersed transformers, there's a lot of information about the oil. The type of insulating oil used is specified. Different types of oil have different properties, such as dielectric strength, flash point, and viscosity. The oil volume is also given. This is important for maintenance purposes, like checking the oil level regularly.
The oil temperature rise is another crucial piece of information. It tells you how much the temperature of the oil will increase above the ambient temperature when the transformer is operating at rated load. Monitoring the oil temperature is essential to ensure the transformer is operating safely.
Cooling Information
The nameplate provides details about the cooling method. There are different cooling methods for oil - immersed transformers, such as ONAN (Oil Natural Air Natural), ONAF (Oil Natural Air Forced), and OFAF (Oil Forced Air Forced). Each method has its own advantages and is suitable for different operating conditions. For example, ONAN is a simple and reliable cooling method for smaller transformers, while OFAF is used for larger transformers that need more efficient cooling.
Other Information
There might be additional information on the nameplate, such as the date of manufacture. This helps you know how old the transformer is. You can also find information about the weight of the transformer, which is important for transportation and installation.
Some nameplates also include safety warnings and instructions. These are there to ensure that the transformer is installed, operated, and maintained safely.
Importance of the Nameplate Information
All this information on the nameplate is incredibly important. For electrical engineers and technicians, it helps them select the right transformer for a specific application. It also guides them in installing and connecting the transformer correctly. For maintenance personnel, the nameplate information is essential for routine maintenance, troubleshooting, and replacing parts.
If you're a customer looking to buy a three - phase oil - immersed transformer, the nameplate information can help you compare different models and manufacturers. You can easily see which transformer meets your power requirements, voltage needs, and other specifications.
Our Product Range
We offer a wide range of three - phase oil - immersed transformers to meet different customer needs. In addition to the ones I mentioned earlier, we also have the 30 - 2500kVA/10kV Class I Energy - Efficiency Oil - Immersed Transformer. These energy - efficient transformers can help you save on electricity costs in the long run.
Let's Connect
If you're in the market for a three - phase oil - immersed transformer, don't hesitate to reach out. Whether you have questions about the nameplate information, need help choosing the right transformer for your project, or want to discuss pricing and delivery, we're here to assist you. Just get in touch, and we'll work together to find the best solution for your electrical needs.
References
- Electrical Power Systems Technology, Third Edition by Stephen W. Fardo
- Transformer Engineering: Design, Technology, and Diagnostics by G. K. Dubey