DNH7 series fuse type load isolating switch is applicable to high short circuit current circuit with AC50HZ
DNH7 series fuse-type disconnector (hereinafter referred to as switch), is our company with reference to foreign ABB products designed for AC 50Hz, rated voltage to 660V, agreed to heat up to 630A with high short-circuit current distribution circuit and Motor circuit, used for manual infrequent operation of the power switch, disconnector and emergency switch, and for circuit short circuit protection purposes.
Switch handsome in appearance, novel and simple, simple structure, easy to operate, in line with IEC60947-3, GBI4048.3 standards. Is the best choice for similar products.
1. The switch is mainly composed of base, cover, arc cover and other parts, the static contact directly on the base, the fuse mounted in the cover directly as a movable contact with the blade or directly with the blade when the isolation switch with the cover Can be rotated along the fulcrum of the base fan to open, so that the fuse from the socket completely pull out, and has a large isolation distance, the cover can also be easily withdrawn from the base to facilitate the installation of the switch and safe replacement fuse.
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|Mounting method||busbar or plate|
|Rated operating voltage Ue V||AC690|
|Rated operating current Ie A||160|
|Thermal current with fuse-link Ith A||160|
|Utilisation category AC (IEC 60947-3)||AC-21B(690V)|
|Rated surge voltage Uimp kV||8|
|Degree of protection front side||IP20(open)|
|Fuse protected short circuit making kArms||50|