Falling foreign matters and piercing
The noise of dry-type transformer belongs to low-frequency noise. In a small area， most of it is scattered according to the building structure. This kind of low-frequency noise is scattered to the household house according to the house building， and then causes gas vibration noise which is then scattered to the ears of consumers. Although the amount of noise is not very large， common faults of iron core will occur. Don"t worry. Contact the transformer manufacturer， and the manufacturer will assign professional technicians for inspection. The main reasons are as follows:
Due to careless transportation of the transformer and the thin high-voltage conductor the transformer was disconnected by vibration (but there was no grounding device).
PowadiwazinkV and above & plusmn; No load of rated voltage; Part of the circuit breaker of the tap power switch is installed in the phenolic resin insulating paper cylinder， and the insulating paper cylinder is installed on the wooden frame. The actual operation rocker is connected with the dynamic circuit breaker of the tap power switch according to the wooden insulating rod. The on load tap off power switch is insulated from the ground by the insulating paper cylinder of the power switch itself and the insulating limit.
The clock expression is used to indicate the phase difference correlation of the working voltage of the secondary side line. The phasor of the working voltage of the primary side line is used as the minute hand， the fixed finger is at o"clock， and the phasor of the phase voltage of the secondary side is used as the second hand.
The zero line is mainly used in the working circuit. The voltage caused by the zero line is equivalent to the line resistance multiplied by the current of the working circuit. Because of the distance， the voltage caused by the zero line can not be ignored. As a countermeasure to maintain life safety， it is more and more unreliable. Ground wire (PE): it is not used as a working circuit， but only as a maintenance line. Use the affirmation of the earth & ldquo; ” Voltage. When the machine and equipment casing is electrified， the current will be quickly grounded. Even if there is a lead for the PE line， it will be grounded from the surrounding grounding body.
When the transformer is out of phase， if the second phase is blocked， there is still no sound when the second phase is sent， and there is sound when the third phase is sent; If the third phase is blocked， the sound will not change， as in the case of the second phase. There are three reasons for phase deficiency:
The step-up dry-type transformer refers to the instantaneous operation of voltage. At this stage， there are few manufacturers of dry-type transformer that can reasonably guarantee the instantaneous step-up in China. The step-up dry-type transformer has strong step-up capacity and good practical effect. The difference depends on that the transformer power switch without excitation regulator does not have the ability to change gear with load. Because this kind of tap power switch can cut off the whole process in a short time during the whole process of gear change， cutting off the load current will cause arc burning between circuit breakers， tap power on and off or short circuit fault， so the dry-type transformer shall be powered off during regulation. Therefore， it is generally used as a dry-type transformer that is not very strict in voltage regulation and does not need to be adjusted frequently.
The insulation distance between the winding and the iron yoke of power transformer is much larger than that between the windings， because the electric field between the winding and the iron yoke is far away and not as symmetrical as that between the windings. In the electric field in the middle of the winding， most of the cables are in phase with the insulating cylinder (plate) in the middle of the winding， that is， the disconnection component of the electric field is small.
assetsDue to careless transportation of the transformer and the thin high-voltage conductor， the transformer was disconnected by vibration (but there was no grounding device).
In the case of dry-type transformer operation， there is more noise， and some even cause noise， which seriously endangers everyone"s no problem rest time and work. At this time， the dry-type transformer needs sound insulation treatment. There are many processes and key methods to deal with the noise of the common dry-type transformer. How should the noise of the dry-type transformer be solved? Or with the dry-type transformer manufacturer"s network editor to simply understand it.
When checking the hook core，Banska TavernDelivery test report of dry-type transformer， the insulation of the electromagnetic coil and the porcelain sleeve is usually accidentally damaged. After the shell of the pottery is broken， turn on the photo flash when it"s light， and it"s short when it"s heavy. Therefore please pay attention during maintenance. It is not necessary to destroy the insulation. After maintenance， experts can inspect special tools，Banska TavernRecycling power transformer manufacturer， parts， insulation， the electric flow will leak into the earth along the installed grounding wires， so as to achieve the purpose of safety， otherwise it will have an adverse impact on life safety.
The grounding resistance of， high voltage and bottom voltage shall not be less than % (m & omega;) of the original value. The difference between the three-phase mean value of winding resistance measurement at the same temperature shall not exceed %， which shall not exceed % compared with the last accurate measurement result.
The first step of the whole wave process calculation is to calculate the basic parameters of the Internet such as inductance， capacitance and resistor. The accuracy of those basic parameters does great harm to the calculation results of the whole wave process. For the inductance calculation， the good model is the solid model of infinite transformer core column， but there are many calculation methods.
Banska TavernThe zero line is mainly used in the working circuit. The voltage caused by the zero line is equivalent to the line resistance multiplied by the current of the working circuit. Because of the distance， the voltage caused by the zero line can not be ignored. As a countermeasure to maintain life safety， it is more and more unreliable. Ground wire (PE): it is not used as a working circuit， but only as a maintenance line. Use the affirmation of the earth & ldquo; ” Voltage. When the machine and equipment casing is electrified， the current will be quickly grounded. Even if there is a lead for the PE line， it will be grounded from the surrounding grounding body.
Dry type transformer company
Different diversion methods， dry-type transformers mostly use silica gel waterproof casing， while oil transformers mostly use porcelain waterproof casing;
