please select HUIYUE transformer bushing auto through machine manufacturer.

LI Xian Hui smaller first to tell you about what is transformers, high frequency transformer is a device used to change the voltage and current of electrical equipment. Transformer winding wire is drawn outside the box casing to rely, as an insulating sleeve to the tank, and the current is supplied to the fixed effect outside the box, it is required to adapt to the various environmental conditions, and have a certain mechanical strength, is a major component in the transformer. Casing need to have different voltage and current levels, external insulation mostly porcelain sets. There are different forms of pure porcelain sleeve bushings, oil-filled tube, inflatable tube, condenser casing. The condenser bushing capacitance is dominated core insulation sleeve with tape and paper Capacity capacitive bushing are two, then the following is an analysis of how Mike handle high-frequency transformer bushing failure, please read below:


1. between the primary winding insulation and turn insulation failure
 
Primary insulation and turn insulation transformer winding is prone to failure of the site. The main reason is: overload due to the long run, or heat conditions are poor, or long service life, the transformer winding insulation aging embrittlement Dielectric strength greatly reduced; transformer short circuit many times by the impact of the winding force and deformation, hidden insulation defects, once the event of voltage fluctuation is likely to insulation breakdown; transformer oil water, greatly reducing the strength of the insulation can not afford to allow the voltage, resulting in insulation breakdown; strengthen or low voltage winding section at the site in the high voltage winding, because turnkey insulation expansion, so that the oil duct obstruction, the impact of heat, so that the aging of the winding insulation due to overheating, short circuit breakdown; inadequate facilities due to lightning in the atmosphere under the action of over-voltage, dielectric breakdown occurs.

2. Lead Insulation fault

Transformer lead through the transformer casing bore leads connected to an external circuit, the lead is supported by the casing and insulation. Because the upper casing cap (the cap) closed lax water, lead the main insulation breakdown damp, or transformer inside the tank to make a serious lack of oil leads exposed to the air, causing internal flashover will occur in the lead at fault .

3. Core insulation failure

Transformer core is made from silicon steel plates stacked with insulation between the silicon film. Because silicon fastening bad, so that the film destroyed vortex local overheating occurs. Similarly, the core of the clamping screw through the core, the pressure of iron and other components, if insulation damage, overheating will occur. In addition, if there is iron or welding slag residues inside the transformer, so that two or more points grounding core, the core will cause malfunction.

4. The high-frequency transformer bushing flashover and explosions

Transformer high side (110kV and above) is generally used capacitor casing, due to poor porcelain and therefore have trachoma or cracks; defective capacitor core manufacturing, internal free discharge; casing seal is not good, there is leakage; casing severe fouling, etc., are likely to flashover and explosions.

5. Tap switch failure

High-frequency transformer tap changer is one of the common parts of the transformer fault. Tap-minute no-load voltage regulation and load tap two, common causes of failure are:

1) No-load tap: by pressure due to prolonged contact, there will be less pressure springs, roller pressure uneven, so tap-connected part of the effective contact area is reduced, and the contact junction partially silvered wear off, causing tap-heat damage during operation; tap-bad, bad connections and lead soldering, unable to withstand the impact of short-circuit current caused by short-circuit current tap-burn and failure; due to poor management, adjustment disorder tap or tap-work effect caused by the accident.

2) load tap changer: with on-load tap transformer tap transformer tank and fuel tank are generally mutually unintelligible. If the tap-tank serious lack of oil, the tap-switching will occur in the short-circuit failure, so tap-burn.

Dongguan Hui Yue Technology HY-R20 automatic wear sleeves on existing CNC machine by adding automatic winding machine casing wear mechanism for processing high-frequency transformers, transformer bushing wear suitable for the vast majority of production, with CNC easy to use, quick, quality assurance, greatly improve production efficiency and reduce the cost of feasibility. Electronics factory, transformer factory preferred automatic wear bushing machine equipment manufacturers. (Note: Our automatic casing machine complies with all CNC winding machine models on the market)
Source：HUITUE transformer bushing auto through machine Manufacturers