Load Break Document For Free

A load break switch or LBOR switch is an ?on / off? switch, similar to an ?on / off? light switch in your house. A load break switch is designed to switch the power ?on or off? or change the position when the transformer is energized (meaning it has a load on it)?the switch will break this load.

By contrast, a load-break rated disconnect is a disconnect that can open a circuit while current is going through it (while it's on). Load-break rated disconnects are used to turn whole systems off, and they can get expensive ? which is one reason to use a non-load break rated disconnect that doesn't interrupt current.

A load break switch (lbs) is a device that ensures the on-load making, breaking, and safety disconnection of low-voltage electrical circuits.

An isolator is an off-load device; it can only be operated when the current flowing is zero i.e., when the power supply is off. While a circuit breaker is an on-load device; it can operate perfectly when the power supply is on.

The load break switch makes, breaks, and carries currents. The disconnector acts as a safety measure; it isolates a part or the whole of a circuit and prevents current from flowing through; this is done to prevent hazards during inspection, maintenance, and repair.

To ensure safe operation, it is important to select a switch with appropriate ratings for the system voltage level, short-circuit rating (Ik) and rated load current. Other factors such as environmental conditions should also be taken into consideration when selecting an MV LBS.

Basically and LBS is only designed to make and break load currents. It can be closed onto a fault (has a making rating) and cannot break a fault current. A CB is designed to make and break fault currents and off course load currents.