Zhejiang Hitt Electric Co., Ltd is a professional manufacturer of precision casting with advanced silical sol investment casting equipment. The company invests RMB 150,000,000 in a modernized silical

When the vacuum circuit-breaker open circuit in normal time, the arc-electric is very weak, the color is blue. If the arc-electric's color turn to the yellowish-orange greatly, indicates the arc-extinction chamber to be unusual, when the glass case's vacuum degree drops down, In the scene we usually use the exchange compression to take the test examination, according to rating pressure resistance stable for 1 minute, if the non arc-over phenomenon, thought that the circuit breaker is qualified.

Zinc oxide ZnO the arrester is one kind of new arrester which in the 70s' developed, it mainly constituted by the zinc oxide varistor. Each varistor from make has its certain switching voltage (to call varistor), (i.e. is smaller than under the normal working voltage presses sensitive voltage)

In the countrysides the thunder and lightning's accidents happen from time to time, many are because of the personnel incompetent work, therefore sometimes we had met the electricity cannot deliver's embarrassing situation, very hurtful.

The high-voltage dropout fuse collection short circuit protection, the overload and isolating circuit's function is a body, widely usesd on the distribution line and the equipment, it can use in small power and to be protective value request not high place, it also may use with the isolator coordination, replace the automatic air switch; With the load switch coordination use, replaces the high price circuit breaker. The fuse's structure is more simple and protects reliably, but if uses improper, will cause to move by mistake or not to act, creates the inevitable economic loss.

The dropout fuse may also make a reclosing floodgate, it has two set of fuse tubes. In normal, only one set of fuse tube connection after the fuse cutout. asked that separates one fixed time with (about 0.3-0.5s), another set taking advantage of the automatic heavy reclosing floodgate, but in the automatic reclosing also promotes to the low-power 35kV transformer uses the instep to fall the type fuse protection, namely Rw5 35, use in replacing old product type _Rwl 35 high-voltage fuse. It is similar with the 10kV dropout fuse,only fuse tube is more longer. Dimensions are more bigger (two static contacts use two stand-off insulators fixedly).

The circuit breaker is called the high-voltage switch, it is one of the most important equipment in transformer substation, it not only may shut off and closed high electric circuit's zero-load current and the load current, moreover works. And when phylogeny breakdown, the circuit breaker and the protective device and the automatic device coordinates get together, excises the fault current rapidly, reduces the power cut scope, the forestall trouble expands, guarantee system safe operation.

In the high-voltage electric appliance production's sample, the pattern, the technical paper, the inspection report, the test report, the instruction for use and the production's name brand, often use each kind of specialized term terminology, they express the product structural feature, the technical performance and the use environment.