We supply below products 1.SIEMENS Medium Voltage Panels 8BK80, 8BK88+, 8BK20, 8BK71. 2.VCB (3AH0, 3AH3, 3AH5, 3AF, 3AK, 3AG), Vacuum Contactors (3TL8100) Up to 33KV. 3. EHV Circuit Breaker (3AP1, 3AP2) up to 400 KV.
3AH5 vacuum circuit-breakers control all switching duties in medium-voltage systems. They are applicable for operation of e.g. overhead lines, cables, transformers,generators, capacitors, filter circuits, motors and reactors. Here, small short-circuit ratings in distribution systems face high breaking currents in industrial systems. The 3AH5 vacuum circuit-breaker is a real all-round device in its field of application. With its compact dimensions, it fits in all customary switchgear types. The comprehensive variety of types with different normal currents and short-circuit currents.as well as various pole-centre distances for voltage levels from 12 kV to 36 kV enables its universal application for all mediumvoltage requirements.The 3AH5 vacuum circuit-breaker consists of the pole assemblies (1) and the operating mechanism box (2). The pole assemblies are fixed to the operating mechanism box via post insulators (3). The switching movement is transferred by means of operating rods (4) and levers.
Universal installation in allstandard medium-voltageequipment• Suitable for use as 1-poleor multi-pole mediumvoltagecircuit-breaker forall switching duties inindoor switchgear• For switching all resistive,inductive and capacitivecurrents• For switching generators• For switching contactlines (1-pole tractioncircuit-breakers)Switching dutiesThe switching duty of thevacuum circuit-breakerdepends on its type ofoperating mechanism:• Stored-energy operatingmechanism– for synchronization andrapid load transfer (U)– for auto-reclosing (K)• Snap-action operatingmechanism (snap-actionCLOSED, stored-energyOPEN)– for normal closing andopening.
3AK vacuum circuit-breaker modules are 3-pole interior circuit-breakers for a ratedvoltage range of 7.2 kV - 17.5 kV.Under normal operating conditions, the vacuum circuit-breaker modules are maintenance-free up to 10 000 operating cycles.Intended use 3AK vacuum circuit-breaker modules are suitable for switching any type of alternatingcurrent circuits under normal operating conditions, such as:• Three-phase motors for reversing, turning and direct operation• Transformers• Capacitors• Generators• Resistor consumersSuitable for high frequency of operation and unlimited on-time.3AK vacuum circuit-breaker modules operate in continuous, periodic and short-termoperation.