TJ-1.14/630 1.14KV 630A vacuum interrupters for AC Contactors
structure type
The ceramic outer casing vacuum interrupter is mainly composed of a
gas-tight insulating shell, a conductive loop, a shielding system,
a contact, a bellows and the like.
working principle
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.
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.
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If you don’t see what you wanted: These pages show only a fraction of the stock we have available. We
have many thousands of vacuum capacitors, both fixed and variable,
as well as vacuum relays. This stock changes daily. If you have
requirements for items not listed in these product lines, please
email us.and our knowledgeable staff will search our inventory. (Don’t
forget to give us your email address and contact information!)
