TJ-12/630 12KV 630A vacuum interrupters for AC Contactors
Its main function is to enable the medium and high voltage circuit to quickly extinguish the arc and suppress the current through the excellent insulation of the vacuum inside the tube, and to avoid accidents and accidents. It is mainly used in the power transmission and distribution control system and also in metallurgy. Distribution systems for mining, petroleum, chemical, railway, broadcasting, communications, industrial high frequency heating, etc.
The vacuum interrupter in the vacuum bubble is an electric vacuum device that utilizes a high vacuum working insulation arc extinguishing medium to realize the on/off function of the power circuit by a pair of contacts sealed in a vacuum. When it breaks a certain value of current, at the moment of separation of the moving and static contact, the current shrinks to a point where the contact is just separated, and the resistance between the electrodes increases sharply and the temperature rapidly increases until the evaporation of the electrode metal occurs. Extremely high electric field strength results in extremely strong emission and gap breakdown, resulting in a vacuum arc. When the power frequency current approaches zero, it is also an increase in the contact opening distance. The plasma of the vacuum arc quickly spreads around. After the arc current crosses zero, the medium in the contact gap quickly changes from the conductor to the insulator, and the current is broken. Due to the special configuration of the contacts, the contact gap during the arcing will produce an appropriate longitudinal magnetic field. This magnetic field can evenly distribute the arc on the contact surface, maintaining a low arc voltage, thus making the vacuum interrupter have a higher arc. Post-media strength recovery rate, small arc energy and small corrosion rate. In this way, the ability and service life of the vacuum interrupter breaking current is increased.
We have a wide range of equivalents for other part numbers . Please contact us if you can not find here what you need.
The freight of list is just reference, please base on the actual freight when the products are sent to you.
When you place an order, please choose a shipping method and pay for the order including the shipping fee. We will send the items within 5 days once your payment is completed.
The delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect how quickly your product is inspected.
Buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments.
The shipping cost does not include any import taxes, and buyers are responsible for customs duties.
We ship by DHL,UPS,FEDEX OR EMS. We will select the fast and reliable way for delivery. Save on shipping and safter on delivery. Items will ship within 5 business days on payment
Received.We are not responsible for wrong or undeliverable address.
By UPS, DHL, FEDEX: 5-7 Businessdays to most of countries.
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After you receive the items you ordered. In 15 days, When you are not satisfied with our products and service. We will refund to you or resend new one to you immediately.
However, the buyer should make sure that the items returned are in their original conditions. If the items are damaged or lost when they are returned, the buyer will be responsible for such damage or loss, and we will not give the buyer a full refund. The buyer should try to file a claim with the logistic company to recover the cost of damage or loss.
The buyer will be responsible for the shipping fees to return the items
Warranty & Maintenance:
We offer the 1-month free replacement. Buyers may request for a replacement within 15 days from your receipt of the product. The buyer should return the product in the original conditions to us and should bear the shipping costs for return.
We provide 12-month free maintenance. If any part is required to be replaced, the buyer should also pay for the costs of the parts to be replaced.
Before returning the items, please confirm the return address and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP.