-
Application analysis of leakage protection in electric vehicle charging pile
Jul 25 , 2022
As the world's largest consumer of new energy electric vehicles, new energy electric vehicles are developing rapidly, and the safety of electric vehicle charging piles is a top priority: whether the electric vehicle charging pile can avoid random plugging and unplugging during the charging process. The accident caused by the charging gun, whether it can be automatically powered off after charging,...
Read More
-
The ratio difference, angle difference of the transformer and the safety on the current transformer line
Jul 25 , 2022
Ratio difference: The fault of the transformer includes both the ratio difference and the angle difference. The ratio error is abbreviated as the ratio error, which is usually indicated by the symbol f. It is equal to the difference between the actual secondary current and the primary current converted to the secondary side and the ratio of the primary current converted to the secondary side. It i...
Read More
-
The function of RCD fused connection unit
Jul 25 , 2022
From the image above, we can see that the three-phase power line and neutral line from the circuit breaker to the electrical equipment pass through the zero-sequence current transformer, and after the secondary winding of the differential current transformer is processed by the RCD detection and control device, to control the circuit breaker to trip. This is how the leakage switch RCD works. Note:...
Read More
-
Application of Rogowski Coil in Active Power Filtering
Jul 21 , 2022
The extensive application of nonlinear loads in power grids brings a series of problems harmonic wave. The main hazards of harmonic wave include: Increase the load of power facilities, reduce the power factor of the system, reduce the effective capacity and efficiency of power generation, transmission and electrical equipment, resulting in equipment waste, line waste and power loss; Causes th...
Read More
-
Fixation Mode of Split Core Current Transformer
Jul 21 , 2022
Split core current transformers are often used in equipment and have excellent induction effects, which can improve the use efficiency of equipment, have a good effect in controlling current, and complete the conversion of upper and lower voltages. How should we fix it in order to make it work smoothly and avoid vibration? ZTC will take you to understand. 1.Fixing with set screws: The set screws a...
Read More
-
The Difference of Zero Current Transformer and Current Transformer
Jul 21 , 2022
The zero current transformer is a current monitor of line fault. It has only one iron core and secondary winding. When it works, the primary three-core cable is passed through the iron core window of the transformer, and the secondary one is connected to the relay with lead wire, and then the output terminal of the relay is connected to the signal device or alarm system. Under normal circums...
Read More
-
Split core current transformer Structural characteristics and working principle
Jul 20 , 2022
1. Structural features Split core current transformer has a good design structure, beautiful appearance, and a transparent flip-top design for easy wiring. The shell material is made of PC/ABS alloy, which has the characteristics of high temperature resistance, high mechanical strength and environmental protection; the iron core is made of oriented cold-rolled silicon steel sheet, which has the ch...
Read More
-
Overview of zero phase current transformers
Jul 19 , 2022
The zero phase current transformer is a line fault current monitor. Generally, there is only one iron core and secondary winding. When using, the primary three core cable is passed through the iron core window of the transformer, and the secondary wire is connected to a special relay, and then the output terminal of the relay is connected to a signal device or an alarm. system. Under normal circum...
Read More
-
Current transformer selection points
Jul 19 , 2022
Current transformer selection points: (1) The rated frequency of the current transformer should be consistent with the current frequency of the line under test. (2) Select the rated voltage of the current transformer according to the voltage level of the line under test to ensure the safety of the staff and the instrument. Never use a current transformer with a lower rated voltage to measure line ...
Read More