How should an overloaded transformer in operation be handled? When an operating transformer experiences overload, it may manifest as the current exceeding the steady-state value, signaling, and alarm bells sounding, among other indicators. Operators should take appropriate steps based on the following principles: (1) Check whether the current on each side exceeds the specified value
What’s the Operation Steps for Transformer Start-Up？ (1) For transformers using forced oil circulation, the cooling system should be activated before commissioning. In the case of forced oil circulation water-cooled transformers, the oil system must be activated first, followed by the water system. After discontinuing the water cooling system in winter, the water should be completely
What are the Hazards of a Sudden Short Circuit to a Transformer? When a sudden short circuit occurs at the secondary terminals of a transformer while rated voltage is applied to the primary side, the maximum value of the short-circuit current can reach 20 to 30 times the rated current amplitude. The maximum value of the short-circuit current is related to the
How does a transformer change voltage? When an electric current flows through the primary coil of a transformer, it induces an alternating electromagnetic field. This electromagnetic field induces a current in the secondary coil, resulting in the formation of a voltage different from that in the primary coil. The reason for this voltage change lies in the difference in
What Are the Types of Transformers? There are many types of transformers, which can be classified based on voltage regulation, number of phases, applications, structure, cooling methods, and more. 1. Voltage Regulation: (1) Step-Up Transformers: Increase voltage. (2) Step-Down Transformers: Decrease voltage. 2. Number of Phases: (1) Single-Phase Transformers: Have one phase. (2) Three-Phase Transformers: Have three
What is the Role of Immersion Insulation Varnish in Transformers? Immersion insulation varnish plays a crucial role in enhancing the performance of transformers, with specific functions as follows: (1) Enhancing Electrical Insulation Performance: Immersion insulation varnish significantly strengthens the electrical insulation performance of transformers, ensuring their ability to safely withstand high voltage environments and thereby
What is the Impact of Impedance on Transformers? Impedance is a crucial parameter in the design and operation of transformers, affecting various aspects of their performance. (1) Efficiency: Transformer efficiency refers to the ratio of input power to output power. The presence of impedance leads to energy losses, thereby reducing the efficiency of the transformer.
How to Overhaul a Transformer Core The transformer core serves as the mechanical backbone of the entire transformer and is a crucial component that provides the magnetic circuit for the transformer. Therefore, inspecting the transformer core is a key step in ensuring the safe operation of the transformer. The inspection of the core involves the
When is it not allowed to adjust the on-load tap changer of a transformer? During the operation and maintenance of a transformer, the adjustment of the on-load tap changer (OLTC) needs to strictly adhere to regulations to ensure the safe and stable operation of the transformer. Here are several situations in which adjusting the OLTC
What reasons can cause abnormal noise in transformers? During the operation of a transformer, the occurrence of abnormal noise can be attributed to various factors. When the transformer operates under overload conditions, internal copper and iron losses increase, leading to elevated temperatures and reduced heat dissipation. In such situations, the transformer may emit a dull
