_____ are nonmanual control switches activated by an unsafe condition.
Right Answer is:
- Interlocks are nonmanual control switches activated by an unsafe condition.
- Interlocks do operate automatically but are not intended to control the motor in normal circumstances.
- Typically, interlocks stop motors automatically but do not start motors automatically.
A few examples of interlocks are
- Motor overloads
- Low level on the suction side of a water pump
- High discharge pressure on a positive displacement pump
- High torque on a conveyor belt
Interlocks are intended to protect human life or equipment, so they are designed to function regardless of whether a manual or automatic control is in use. Therefore, they are wired in a motor control circuit on the line side of other devices.