Seal oil leakage
The dry-type transformer is composed of two winding resistances， resulting in four wiring groups: & ldquo; y， Y & rdquo;， Y & rdquo;， & ldquo; y， D & rdquo; and & ldquo; D， D & rdquo;. In China， only & ldquo; y， Y & rdquo; and & ldquo; y， D & rdquo; are selected. Because there are also two types of Y-connection with neutral line and without neutral line. If there is no neutral line， it will not be upgraded. All marks show that with neutral line， it will not be upgraded The letter N after the English letter Y indicates that the neutral line has transformer grounding wire. Yn wiring group， when UAB and UAB overlap， the minute hand points to . & ldquo; & rdquo; in the new wiring group， it is indicated by & ldquo; & rdquo.
negotiationFor oil transformer oil replenishment， unused transformer oil conforming to the new standard should be selected first. In addition， the oil with the same basic same brand and same additive type is expected to have a stronger effect. The characteristics of the oil should not be lower than that of the oil in mechanical equipment. When the new remaining oil is less than %， there is generally no problem. However， if there is more new remaining oil， oil shall be added before oil type Chromatographic analysis and pressure test shall be carried out to establish that there is no oil stain， and the acid value and dielectric loss shall not exceed the oil in the machinery and equipment.
In order to better reduce the probability of short-circuit fault of relay protection dry-type transformer， prevention and key are & ldquo; Prevention and Manipulation & rdquo; Is dominant.
mossTherefore， in the installation process of substation equipment， the lightning rod should be set according to the specific situation to prevent damage to the relay protection dry-type transformer caused by lightning. In addition， in the installation and use process of lightning rod， select reasonable types of lightning rod according to the operation situation to determine that they are in the same situation. In addition， during the installation of lightning rod， please connect all routes as far as possible to prevent other faults.
Difference between dry-type transformer and oil immersed transformer:
The vibration reduction solution of cable bridge is to modify the hard connection between bus bridge and dry-type transformer， and the vibration reduction solution is made at the cable bridge.
In fact， ground wire is not only a kind of grounding protection. The following describes in detail that ground wire is the general name of grounding system. Ground wire is divided into protective grounding and safety factor grounding device. Among them， safety factor grounding device can be divided into grounding protection， anti electric shock grounding device and anti electromagnetic wave radiation grounding device. Protective grounding is to use it for loop to make the facilities achieve the grounding wire specified by the function.
Precautions for trial operation of power transformer manufacturers
Insulation and heat removal are different. Dry type transformers are generally insulated with epoxy resin， cooled by natural air and large capacity by centrifugal fan. Oil immersed transformers are insulated by insulating oil， insulated by insulating oil in the circulating system inside the transformer， and heat is discharged on the radiator (radiator) of the circulating system inside the transformer.
RangeThe 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.
Dry type transformer factory
The time difference between different steps of three-phase power switch of switching power supply shall be less than ms， the closing shall be maintained by high-voltage arrester， and the neutral line of transformer shall be reliably grounded (it shall be grounded immediately).
Under normal conditions， the operation and maintenance management staff shall improve the safety inspection range of the transformer， and immediately communicate and contact with the on-site project staff in case of any problems， generally，negotiationOil immersed transformer 1250， the sealing of box edge and machine cover is sealed with acid-base resistant rubber rod or rubber plate. If the joint is not solved well it will lead to common faults of oil leakage.
negotiationIn specific daily life，negotiationMarket price of scb11 dry type transformer， we have a certain understanding of the optical wavelength of oil immersed transformer. What kind of function does it have for transformer?
In specific daily life we have a certain understanding of the optical wavelength of oil immersed transformer. What kind of function does it have for transformer?
When the transformer is put into operation， if the tap changer is not in time， a great & ldquo; Tweet & rdquo; The high-voltage fuse is broken when the noise is serious; If the tap changer is defective，negotiationInsulating oil of oil type transformer， it will cause mild & ldquo; Squeak & rdquo; Corona discharge sound， once the load increases， it is likely to burn the circuit breaker of the tap changer. In case of such situation， power off immediately for maintenance.
