1 Technical description

1.1

General mechanical characteristics

1.1.1 Framework

The switchboards are manufactured in multi-cubicle, self-supporting, and dead-front type. They comprise several individual panels and complete with necessary fittings and instruments. The right and left side of the switchboard are covered with remove-able steel plates. On the front, the doors are hinged on the left side of the frame (left opening if not otherwise specified) which can be opened in an angle more than 90° without disturbing the meters, pilot lamps and etc. mounted on them. The doors are equipped with arrestors to keep the door in opening position. All doors are earthed to the frame with yellow/green wires. On the rear, the lift-off covers are arranged as standard (the hinged doors are optional. In case of the switchboard is inaccessible from back side, the screw-fixed cover plates are installed instead). The protection degree applicable for switchboards is IP23, if not otherwise specified.

The framework of the switchboards is of maintenance-free welded construction which is designed based upon the basic grid dimension of E=25mm, have horizontal girders on front and rear side at approximately half height of the frame. The frames of switchboard are made of 3mm cold-rolling steel sheet and doors/cover plates are made of 2mm. Switchgears/ components are arranged on equipment compartment with associated mounting plates/ brackets, which are fastened with self-tapping screws to the frames at flexible intervals following the design grid dimension. The frames can be constructed for almost every requirement, depending of its application the three-dimension of the frame can be selected in steps of 50mm (W: 300-1000mm, H: 1800-2400mm, D: 400-1000mm).

The incorporation of individual panels for switchboard is normally arranged in a row, it can also be arranged in right-angled or back-to-back according to the special requirement.

Depending of the intended use of the panels, they are respectively designed and equipped into e.g. generator control panel, feeder panel, motor starter panel and etc. The individual panels are partitioned with steel sheet plates between each other.

Non-conductive handrails can be provided on the front and/or rear. If the switchboard abuts against the back wall, then the handrail will not be arranged on the rear.

Option: Canopy lighting in front and/or rear of the switchboards are of the fluorescent type, sockets for interior working light can be arranged on the back side, the power is supplied from the switchboard itself. (To be designated in the Scope of Supply)