1. Drying of resistor before inner core assembly
Kako bi se ojačala izolacijska čvrstoća bočne strane otpornika, na bočnu stranu otpornika nanosi se organski premaz s visokim izolacijskim svojstvima. Trenutno, organski premazi koji se obično koriste u Kini imaju određeni stupanj apsorpcije vlage, a postoje i fenomeni apsorpcije vode i površinske kondenzacije (kao što su: fenomen kapljica vode na površini vodovodne cijevi ljeti je očigledna površinska kondenzacija fenomen), dakle, odvodnik Otpornik se mora osušiti prije sklapanja unutrašnjeg jezgra.
Napomena: Odvodnik je zaštitni električni uređaj. Ako ima vlage unutar odvodnika, ili ako vlaga uđe u unutrašnjost odvodnika, on ne samo da neće uspjeti zaštititi, već će i eksplodirati. Stoga je ključna tačka u procesu montaže odvodnika osigurati da unutrašnjost odvodnika bude suva tokom montaže, a moraju se poduzeti stroge mjere zaptivanja kako bi se osiguralo da vlaga ne može prodrijeti tokom dugotrajne- upotrebe. Sušenje otpornika prije sastavljanja jezgre odvodnika je važna mjera kako bi se osiguralo da je unutrašnjost odvodnika suha.
Prilikom sušenja ploče otpornika treba obratiti pažnju na sljedeće točke:
⑴. The drying treatment of the resistance should be carried out in an oven with hot air circulation, and the temperature difference in the oven should not be greater than 5 degree . In an oven without hot air circulation, a mercury thermometer must be measured to confirm the temperature difference between the upper, lower, left and right sides of the oven, and those with a temperature difference greater than 10 degree should be used with caution.
⑵. The resistors should be placed in separate rows and layers in the oven. There must be a certain ventilation space between the rows and layers, and they should not be stacked in a large pile. At the same time, it should be noted that the resistance sheet must be placed away from the heater (such as: resistance wire, heating tube), and the ventilation holes (channels) should not be blocked, so as to avoid the local temperature being too high and the organic coating aging.
⑶. The drying temperature of the resistor sheet is 100 degree ±5 degree , and it is better to keep it warm for 3 to 4 hours. There is no requirement for the heating rate, but the holding time must be started after the temperature reaches 100 degree .
⑷. After heat preservation, the resistance sheet must be cooled to below 60 degree with the oven before opening the door and taking it out for use. When accelerated cooling is required, the oven door can be opened by 110cm, but when the temperature in the oven drops to 60 degree , the oven door must be closed tightly. Take it out and use it at any time, take out a small amount at a time, do not take out a large amount at one time, so as not to absorb moisture again.
⑸. Resistors that are not used up on the day must be stored in a 60 degree oven, or re-dried before the next use.
