The accessories of dry-type transformer have organic oil tanks, oil pillows, tap power switches, air pipes, insulating sleeves, etc., and their function is to ensure the stable operation of the transformer, so what are the accessories of dry-type transformers?
(1) Oil tank: that is, the casing of the dry-type transformer, which is used to dissipate heat and protect the device body (the body of the transformer is placed in the oil tank), and there is transformer oil for the insulation layer in the box.
(2) Oil storage tank (oil pillow): installed on the oil tank, so that the internal structure of the oil tank is isolated from the outside.
(3) Air pipe (explosion-proof pipe): installed on the oil tank cap to maintain the machinery and equipment to avoid destroying the oil tank when there are common faults. When the transformer has a problem and causes a lot of vapor, the gas pressure in the oil tank increases, and the vapor and oil will break the glass explosion-proof film and spray outward to prevent the oil tank from cracking.
(4) Vapor solenoid valve: installed in the pipeline between the oil tank of the transformer and the oil storage tank, the key protection equipment. The internal structure has a floating bucket containing a mercury switch and a partition that pushes the mercury switch. When the transformer produces a common fault, the vapor will be extracted at the upper end of the gas solenoid valve, the oil level will be reduced, the floating barrel will move down, and the mercury switch will be connected to send a signal; When the transformer produces a common fault that is not optimistic, the oil drain breaks the partition, and the baffle is offset, a set of tissues is pushed to make another mercury switch accessed, and the signal is sent and the power is cut off.
(5) Tap power switch: In the power supply system, in order to better make the output voltage of the transformer operate within the scope of agreeing to the transformation, the number of turns of the primary winding coil of the transformer is specified to be adjusted in a certain area, so the original winding is generally equipped with a tap, which is called a sub-connector. By using the power switch to connect with a different connector, the number of turns of the coil of the original winding resistance can be changed to achieve the purpose of adjusting the working voltage.
(6) Insulating sleeve: The effect of installing on the oil tank of the transformer is to lead the end of the electromagnetic coil wire out of the oil tank, and make the wire insulating the oil tank. The working voltage is less than 1KV, the porcelain insulating sleeve is selected, the working voltage is 10-35KV, the pumping or oil waterproof sleeve is selected, and the working voltage is higher than 110KV, and the capacitive sensor waterproof sleeve is selected.
(7) Transformer oil: high material compressive strength and low viscosity, high ignition point and low freezing point, without alkali, alkali, dust and water residues. Efficacy: Strengthens insulation and heat dissipation.
(8) Temperature measurement equipment: detect the oil level and ambient temperature of the transformer. Mercury thermometers are used for small and medium-sized dry-type transformers, and pressure thermometers are used for larger transformers.
