Fuse Disconnector QSA (HH15)

Structural Features

Fully closed structure
HH15 series switch full closed structure ensures stable performance and improvement of work reliability. Both moving and static contacts,which cannot be seen exteriorly, are mounted in a pressed housing made of new type electric engineering plastics.There are connecting terminals,fuse boby socket(HH15) or visible copper conductor HA of series connection and HP of parallel connection, operation axle sleeve, and auxiliary contact socket ,etc. mounted outside the housing. Dismantle or assembly is not allowed without permission for strict technique control for assembly.
Unique contact system
HH15 Series Switch owns a unique contact system of rolling insert type,composed of two sets of double-breakpoint each phase. In structure,rollers of different length and diameter and quantity will compose different contact system and two sets of contacts in series or parallel connection will meet the circuit of different electrical amperage and work categories.
Applying this contact system, the current will pass through four rollers and greatly reduce the electric repulsion when the contact closes.(theoretically,current is1/4,repulsion is 1/6). When the switch is in the state of closing and meanwhile large short-circuit current is passing through(under the limit condition,the current may be larger than 100KA), the roller will clamp the static contact tighter as per the reversal parallel law.
During the movement, the touching between roller and static contacts belongs to rolling and slide friction so as to effectively avoid the occurrence of fusion welding.
Independent of manpower operation
The operation mechanism of HA series switch is desingned with energy-storage spring. In spite of switch-on\off is operated with force manually, the moving speed of moving contact is independent of operational force and operation speed, ensuring stable switching performance.
Advanced actuator
The actuator is a complete set of device transmitting the operation torque to the operation mechanism axle sleeve of switch ,and the handle is the part for operator to hold.
The actuator is composed of handle mounted on the panel and the driving shaft joggled with handle.The extension shaft and the couple can only be used when the driving shaft is not long enough. In fact, it shall take consideration of inbuilt installation of switch in the complete equipment and never mind of inaptitude between the depth of switchgear and handle mounted on the panel.
The handle is mounted on the panel
The handle mechanism shall be in conformity with the requirement that the door cannot open when the switch is closed, the switch shall be in breaking position if you want to open the door, the switch cannot be closed if the door is unclosed.
The handle has a padlock pulling buckle. Lock the handle with the padlock after being pulled out. The handle cannot turn while in breaking or closing position to avoid error operation of non-operator.
The driving couple shall keep 5mm free distance to the surface in parallel with the handle mounting plane so as to avoid affecting normal work. Therefore, it is ease in installation and adjustment, and that will not cause any difficulty in operation due to imprecise adjustment.
Independent auxiliary contact
The switch may be attached with one or two auxiliary contact boxes. Each auxiliary contact box has pair of NO and a pair of NC contacts. Auxiliary contact box is insert type assembly. It is unnecessary to use screw and is easy to dismantle and assemble.
The breaking and making of both auxiliary contact and switch are synchronous. Working principle of HH15 series switch: switchingin while rotating the operation handle clockwise; switchingoff while anticlockwise

Technical Parameters