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Air-Insulated, Metal-Enclosed and Metal-Clad Medium-Voltage Switchgear


■ up to 36 kV

■ up to 31.5 kA

■ up to 3150 A

■ Type-tested, LSC2B-PM type IAC switchgear according to IEC 62271-200

■ Air as insulating medium is always available

■ Evidence of the making and breaking capacity for the circuit-breakers and the make-proof earthing switches inside the panel

■ Vacuum circuit-breaker withdrawable on truck

■ Withdrawable voltage transformers with primary fuses in connection compartment

■ Easy operation amd maintenance

■ of operation by self-explaining operating logic

■ Use of high-quality standard components

■ Maintenance interval >10 years .

Typical Uses

■ Power stations

■ Distribution stations

■ Industries

■ Power stations, transformer stations and

■ Cement industry

■ Iron and steelworks

■ Rolling mills

■ Mines

■ Chemical industry

■ Mineral oil industry

■ Pipelines

■ Offshore installations

■ Electrochemical

■ Petrochemicals

■ Railway power supplies .

Personnel Safety

■ All switching operations including VCB rack in-rack out performed with front door closed

■ Earthed metal partitions prevents contact with live parts

■ Earthed metallic shutters


•Bolted galvanized steel sheets subdivide the panel into

-Busbar compartment

-Withdrawable part compartment

-Connection compartment.

•Degree of protection between the individual compartments: IP4X/IP3XD

•Thanks to integrated cup type bushings, complete Compartmentalization even when the withdrawable part is in the connected position

•Upper and lower mating contacts fixed in cup-type bushings

•Enforced operated metal shutters for opening or closing the cup-type bushings when moving the withdrawable part

•Metal shutters can be locked when the withdrawable part is racked out

•Upper barrier (access to the busbar) or lower barrier (access to the cable) can be unscrewed independently of one another

•Optional resistance to internal arcing of the busbar compartment

High-voltage door

•Inspection window


-For checking the withdrawable part position

-For reading off the CLOSED/OPEN position indicator of the switching device, of the operating cycle counter and of the “closing spring charged” indication Lock

-For locking or unlocking the high-voltage door (taking the interlocking conditions into account) with an interlocking key

•Hand crank opening

-Hand crank for charging the operating mechanism springs of the switching device

-Opening closes automatically

•Door handle

-After the lock has been unlocked, the door is opened by lifting or is closed by lowering (taking the interlocking conditions into account)

•CLOSED/OPEN pushbutton of the switching device

-CLOSED/OPEN switching when the withdrawable part is in the connected position: When the door is closed, mechanically with pushbutton and tiltable extension mechanism for pushbutton actuation

-CLOSED/OPEN switching when the withdrawable part is in the disconnected position: When the door is closed mechanically by means of pushbuttons (direct actuation)

•Lever for tilting over the extension mechanism (see adjacent figure for operating principle)

•Openings for withdrawable part actuation

-For the hand crank for moving the withdrawable part (taking the interlocking conditions into account)

-For the interlocking key of the withdrawable part (same key as for the high-voltage door). .

Busbar mounting

•On commercially available cast-resin insulators

•Busbars bolted, length according to panel width .


•Metal compartmentalization to the withdrawable part and connection compartments with degree of protection IP4X/IP3XD

•Busbar compartment continuous throughout the entire installation, transverse compartmentalization with respect to neighboring panels possible .

Panel connection

•Connection of cables or bars to current transformers or post insulators

•Connection variants or types of installation are as shown in the illustrations

•Earthing and short circuiting via earthing switch directly at the point of connection

•Fixed-mounted voltage transformers within the current transformer protection zone .

Low-voltage compartment

•For accommodating the devices for protection, control, measuring and metering, e.g. bay controller SIPROTEC

•Shock-proof partitioning from the high-voltage section

•Pressure-resistant partitioning from the high voltage section

•Control cables of the panel are flexible and have metallic covers