MV Load Break Switch (LBS)

What is load break switch?

Load break switches are devices used to open an electrical circuit by isolating the source from the consumer. Whether they are manual, motorised or with a trip function, these devices ensure the on-load making, breaking and safety disconnection of low-voltage electrical circuits.

FZW32-40.5 outdoor AC high voltage disconnect vacuum load break switch 36-40KV

36-40KV outdoor LBS AC high voltage disconnect vacuum load break switch

FZW32-24 outdoor high voltage disconnecting vacuum break load switch 24KV LBS

24KV LBS with three-phase linkage, is mainly consist of frame, vacuum interrupter components, disconnector components and spring mechanism, disconnector and vacuum interrupter are fixed on frame via insulator, spring is fixed on frame.

Russia indoor 10KV load break switch with fuse ВНА-Л-10/630

Russia indoor 10KV load break switch with fuse ВНА-Л-10/630

FKN12 40KV 36KV air load break switch indoor MV LBS Switchgear

indoor HV air load break switch is a 3-phase AC 50Hz 36kV indoor switchgear equipment.

FKN12 FKRN12 12KV air LBS same as ISARC series

12KV air LBS load break switch MV electric by manual ISARC series


Advantages of Load break switch

Load break switch, generally comes with the spring mechanism for switching ON & OFF the supply, however, option with vacuum circuit breaker is also available. Of course, option with Vacuum circuit breaker is costlier. Choice between these two totally depends on the customer. Load break switch with vacuum circuit breaker is more reliable option.

Load break switch with spring mechanism are generally provided with Fuse protection. And hence, every time a fault occurs, fuse needs to be replaced. On the other hand, if you are using Load break switch with vacuum circuit breaker, we only needs to Turn On the breaker.

Load break switch are also provided with the Earth Switch, which helps in grounding the charges, which can be present even after the switch is turned off.

What is the difference between isolator and load break switch?

Accordingly, the Circuit breakers have both while the Isolator or LBS has only breaking capacity. Isolator therefore used to isolate/disconnect/break load. To be switched on only under no load. ... In simple way the Load Break Switch used to cut off healthy circuits or to break / disconnect the load.

Difference between disconnector, circuit breaker and load break switch?

  Isolator / disconnector. Only suitable for opening at no-load. If you open the switch on load, you'll draw an arc. Cheap.

  Load-break switch. Can be opened and closed under load. Cannot make or interrupt fault current.

  Circuit breaker. Can be opened and closed under load. Can make and break fault current. Expensive. Generally have heavy, spring-driven mechanisms that operate very forcefully and wear out quickly. Not meant to be operated frequently.

  Contactor. A kind of load break switch that is meant to be frequently opened and closed under load, i.e. to control a direct-on-line motor. (Circuit breakers aren't rated for frequent operation - attempting to use a circuit breaker as a contactor will result in rapid wear and failure. See "Utilisation Category".)

  Fuse-switch - a switch combined with a fuse. Comes in off-load or load-break types. Common in overhead distribution systems, in the form of the "expulsion drop-out fuse" which can be operated using a hook on the end of a long stick. Provides short-circuit and overload protection.

  Fused contactor - A fuse in series with a contactor. The fuse protects the contactor against fault currents which might damage the contactor, by welding its contacts together. (See: "Type 2 co-ordination".) Common for control of HV motors.

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