Introduction to insulation materials for dry transformers

First, the type of dry type transformer

(1) There are two types of (epoxy) resin-cast dry-type transformers (CRDT) represented by Europe and dip-coating type (open type) dry-type transformers (VDT) represented by the United States.

(2) CRDT has high mechanical strength, strong short-circuit resistance, good moisture and corrosion resistance, small partial discharge, long operating life and low loss. The company has rich experience in design and manufacture, and its products have high safety and reliability and good environmental protection. Features, especially running performance, are very good.

(3) VDT has the advantages of environmental protection, strong overload capability, temperature resistance and high production flexibility.

(4) According to the statistics of the transformer industry, the resin vacuum casting dry change (CRDT) has a market share of more than 90% in China.

Second, VDT transformer insulation materials

(1) Wire covered wire: NOMEX, 3M, Yantai

(2) Foil insulation between layers: prepreg DMD, NOMEX, NMN, NHN, glass cloth GHG, PET, PEN

(3) Struts, gaskets: 993, 994, Laos collar bar, ceramics, diphenyl ether, fiberglass board

(4) Insulation cylinder: fiberglass board, diphenyl ether, 993,994

(5) phase spacer: fiberglass board, Lao Shi collar FHT, 993, 994

(6) High and low voltage insulation: diphenyl ether, Lao Shi collar FHT, 993,994

(7) End insulation: rubber, diphenyl ether, end seal

(8) Lead wire: crepe paper, heat shrinkable sleeve

(9) Core clip: NOMEX

(10) Insulating varnish

3. Insulation materials for CRDT dry type transformers

(1) Wire covered wire: NOMEX, 3M, Yantai

(2) Foil insulation between layers: prepreg DMD, NOMEX, NMN, NHN, glass cloth GHG, PET, PEN

(3) Struts, gaskets: 993, 994, Laos collar bar, ceramics, diphenyl ether, fiberglass board

(4) Insulation cylinder: fiberglass board, diphenyl ether, 993,994

(5) phase spacer: fiberglass board, Lao Shi collar FHT, 993, 994

(6) High and low voltage insulation: diphenyl ether, Lao Shi collar FHT, 993,994

(7) End insulation: rubber, diphenyl ether, end seal

(8) Lead wire: crepe paper, heat shrinkable sleeve

(9) Core clip: NOMEX

(10) Insulating varnish