Categories | Vacuum Interrupters For AC Contactors |
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Brand Name: | WPVAC |
Model Number: | TJ-12/630 |
Place of Origin: | Jingdezhen China |
MOQ: | 1 |
Supply Ability: | 1000pcs per month |
Rated Working Voltage(KV): | 12 |
Rated Working Current(A): | 630 |
Rated Waking Capability(KA,times): | 4/100 |
Rated Interrupting Capability(kA,times): | 3.2/25 |
Power Frequency Withstand Voltage(kV): | 12 |
Dimension: | Φ60*H105 |
Price: | Negotiable |
Company Info. |
Jingdezhen WPVAC Electric Co.,Ltd |
Verified Supplier |
View Contact Details |
Product List |
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.
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.
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