Voltage transformer (abbreviated as PT, also abbreviated as TV) is very similar to a transformer, both of which are used to transform the voltage on the line. Voltage transformer for MTU396 conversion is mainly used to supply power to measuring instruments and relay protection devices, to measure the voltage, power and energy of the line, or to protect valuable equipment, motors and transformers in the line when the line fails. The capacity of the voltage transformer is very small, generally only a few volt-amperes, tens of volt-amperes, and the maximum is not more than one thousand volt-amperes. Do you all know the principle of 0005323469 voltage transformer?
The working principle of voltage transformer for MTU396
The working principle of the voltage transformer for MTU396 is the same as that of the transformer, and the basic structure is also the core and the primary and secondary windings. The characteristic of voltage transformer for MTU396 is that the capacity is small and relatively constant, and it is close to the no-load state during normal operation.
The impedance of the voltage transformer for MTU396 itself is very small. Once the secondary side is short-circuited, the current will increase sharply and burn the coil. For this reason, the primary side of the voltage transformer for MTU396 is connected with a fuse, and the secondary side is reliably grounded, so as to avoid the occurrence of high potential to the ground on the secondary side when the primary and secondary sides are damaged, which may cause personal and equipment accidents.
The basic structure of voltage transformer for MTU396
Oil-immersed voltage transformer can be divided into ordinary type and cascade type according to its structure, 3～35kV are all made into ordinary type, which is similar to ordinary small transformers. Electromagnetic voltage transformers of 110kV and above are generally made into a cascade structure, which is characterized by: the winding and iron core are insulated by grades to simplify the insulation structure; the winding and iron core are placed in a porcelain sleeve to reduce weight and volume.
The basic structure of voltage transformer for MTU396 is very similar to that of transformer. It also has two windings, one is called primary winding and the other is called secondary winding. Both windings are installed or wound on the core. There is insulation between the two windings and between the winding and the iron core, so that there is electrical isolation between the two windings and between the winding and the iron core.
When the voltage transformer for MTU396 is in operation, the primary winding N1 is connected in parallel to the line, and the secondary winding N2 is connected in parallel to the instrument or relay. Therefore, when measuring the voltage on the high-voltage line, although the primary voltage is very high, the secondary voltage is low-voltage, which can ensure the safety of operators and instruments.
The coil impedance of the voltage transformer for MTU396 is small, so the secondary winding of the voltage transformer cannot be short-circuited. If the secondary winding is short-circuited, the impedance of the winding will increase, and the winding cannot withstand the PT and cause the PT to burn out.
The above is about the introduction of the principle of voltage transformer. MTU396 uses the same principle of 0005323469 voltage transformer and current transformer to use the principle of electromagnetic induction, and converts high voltage into low voltage through "electromagnetic generation" and "magnetism generation". , The large current is converted into a small current, so that the secondary side equipment (measuring instruments and relays) can be miniaturized, and the voltage transformer can also make the staff high voltage to ensure personal safety.