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. 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. The working principle of the load break switch is to switch the current by moving their contacts mechanically with a suitable speed to make or break the current supply. These switches are exposed to different stresses like thermal, dielectric, and mechanical throughout the switching operation.
Electricity can flow to the circuit when no pressure is applied to the button. However, the flow will immediately be broken on pressing. The switch can remain on in either position, with the connection made and broken from separate devices. Integrated load switches are integrated electronic switches used to turn on and turn off power rails. Basic load switches consist of four pins: input voltage, output voltage, enable and ground. In addition, the mechanical load brake is designed to assist the motor holding brake to hold the load in place when the hoist motor stops running, but if the holding brake should not set the mechanical load brake will stop and hold the load or at least allow the load to slowly descend at a controlled rate of speed.
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. 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.
