-
The higher the Q value, the lower the loss when winding the coil
Aug 12 , 2021
Let’s first talk about the definition of inductor quality factor Q Coil The Q value is the basic main parameter to consider the inductance. It refers to the ratio of the inductance exhibited by the inductance to its equivalent circuit loss resistance when the inductance works under a certain frequency of AC voltage. The higher the Q value of the inductor, the smaller its loss and the higher the ef...
Read More
-
Triggering conditions for protection mechanisms of protective transformers
Mar 13 , 2022
The intelligent motor protector integrates the functions of measurement, control, protection, network communication, etc., and can protect the three-phase asynchronous motor. The modular design of the fully intelligent motor protector, the main controller and the display operation module are separated, according to the actual situation whether to use the display operation module. The product is sm...
Read More
-
Introduction of preventive item inspection before voltage transformer is put into use
Mar 13 , 2022
Preventive testing is an important link in the operation and maintenance of power equipment, and it is one of the effective solutions to ensure the safe operation of power equipment. In order to better ensure that various technical indicators of voltage transformers meet the standards, power engineering construction companies will carry out preventive tests on transformers before they are put into...
Read More
-
What are the wiring principles of current transformers that are widely used
Mar 13 , 2022
Electrical debugging is a key content in the work of power installation engineering projects. In the electrical debugging work, the secondary circuit inspection is also a key adjustment content. It is related to the precise measurement, maintenance, communication and other functions of the power supply system. A prerequisite that cannot be fully utilized. In the secondary circuit, whether the wiri...
Read More
-
Transformer internal structure transformation ratio conversion method
Mar 13 , 2022
The current transformer is an instrument and equipment that converts a large current on the primary side into a small current on the secondary side for accurate measurement according to the basic principle of the magnetic effect of current. It is mainly composed of a closed iron core and windings. Its primary side winding has a very small number of turns, which are connected in series in the route...
Read More
-
Between short circuit and open circuit, these two transformers have different taboos
Mar 13 , 2022
Everyone knows that voltage transformers cannot be short-circuited, and current transformers cannot be open-circuited. Once the voltage transformers are short-circuited or the current transformers are open-circuited, they will destroy the voltage transformers or cause risks. In terms of structural design, we all know that both voltage transformers and current transformers are all transformers, but...
Read More
-
Inspection of factory current transformers and resolution of abnormal instances
Mar 13 , 2022
1. Items to be checked when the current transformer is regularly inspected. How to correctly judge whether there is a fault and how to deal with it. What are the common faults of current transformers? Common faults of current transformers are: 1. The secondary side of the current transformer is open circuit 2. The temperature of the current transformer is too high during operation 3. There is smok...
Read More
-
The basic concept of zero-sequence current protection
Mar 13 , 2022
The basic concept of zero-sequence current protection is based on Kirchhoff's current law: the algebraic sum of the complex currents flowing into any node in the circuit is equal to zero. When the line and electrical equipment are normal, the vector sum of the currents of each phase is equal to zero. Therefore, the secondary winding of the zero-sequence current transformer has no signal output, an...
Read More