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The Power Control Centre (PCC) type TF is a free standing and floor mounting type switchboard, suitable for indoor installation.
To facilitate transportation, the PCC is split into multiple sections. Each section is wrapped in an HDPE cover and packed in a wooden case.
To arrive at the approximate overall dimensions of the packing cases, add 300 mm to the dimensions of the respective section.
Each vertical panel is divided into distinct zones for busbars, droppers, auxiliary busbars, feeders, power cabling and control terminals.
The compartments house main equipment like Air Circuit Breakers, Fuse Switches, Moulded Case Circuit Breakers and associated auxiliary equipment.
Compartment doors are provided with twin-action door fasteners. While closing, the fastener engages with the frame pillar in first quarter turn, and in second quarter turn, it pulls the door towards the pillar. This ensures compression of gasket between door and pillar.
The cable alley doors are of lift-off type. They are provided with half-turn locks operable by a special key.
Overall Dimensions
Height : 2430 mm (without ventilating hoods)
: 2550 mm (with ventilating hoods)
Width : 600, 800 mm
Depth : 1100,1400 mm (base frame)
1144,1444 mm (with front and rear doors)
To increase cabling area, add-on-chambers (AOCs) with a depth of 310 mm are provided on the rear side. AOCs can also be used for bus trunking arrangement on the PCC.
To accommodate relays, relay panel of 320mm width may be used.
Safety Interlocks
To ensure operator’s safety, the PCC incorporates the following interlocks:
Unless the ACB is racked out to isolated position, its compartment door cannot be opened.
Conversely, the ACB cannot be racked in or racked out, unless the compartment door is closed.
However, to facilitate maintenance and inspection, a defeat feature is provided for both these interlocks. Only QUALIFIED PERSONNEL are permitted to use the interlock defeat mechanism.
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