it s a limit switch to prevent the wire breakage due to increase the hook
what is mobile
limit switch on hvac used to cut off low voltage on heating when system over heat limit
Sprint Mobile has a five gigabyte limit on their mobile internet service, though investigation shows that this limit was not always enforced. This was because their technology center were not actually tracking their customer's data usage.
A limit switch is used to determine how far a moving part of an appliance will travel during its use. They can be manually operated or may work via a sensor.
A switch designed to cut off power automatically at or near the limit of travel of a moving object controlled by electrical means
35 miles per hour.
When a typical residential furnace or gas package unit "high limit switch" is found to be bad it is replaced with a new one-not repaired.
The simplest form of control of an electric motor is a switch. In most applications a motor may be allowed to run continuously for lengthy periods, for example, in a fan. However, if a motor is being used to power a crane or to lift a large door it must be made to shut off when the object it is moving reaches a limiting point, whether or not a human operator notices that the limit has been reached. Shutting off an electric motor under this type of condition is the function of a limit switch. In many cases the object being moved makes more or less direct contact with the switch or it does so via some form of lever. However, there are cases where the object might be moving either too fast or too slow to properly operate a switch. In these cases a geared limit switch will be used. The gears in the switch transform the movement of the object being moved to match the needs of the switch. I have mentioned speed of movement. There are other possibilities too. It might be necessary to convert rotational movement to up-and-down movement to control the switch, or various other kinds of movement. Clearly the exact nature of the gears inside the limit switch will vary depending on the transformation required.
What happens if you override the cranes luff up limit switch
There are two limit switches per axis. Each switch is located at both extremities and they prevent the axis to go beyond the limits.
The switch is to limit the engine RPM if the throttle sticks wide open.
Bad low limit switch,fan switch.