PULL CORD SWITCH
1] How far apart are emergency stop button on a conveyor?
2] How does an emergency Pull cord switch work?
3] How are Pull cord switch Wired?
BELT – SWAY SWITCH
1] What is belt sway switch?
2] How does belt sway switch work?
ZERO SPEED SWITCH
1] What is the use of Zero speed switch?
2] What is working principle of Zero speed switch?
Ans: ZSS consist of 2 part , sensor probe and control unit.
The metal piece/ flag is fixed with the rotating shaft in such a way that it rotates in front of the sensor probe. These pulses generated are fed to control unit where they are compared with set rpm (set pulses ), If pulses fed by sensor probe is below set PPR or RPM then the output of control unit changes. Usually, the output is potential-free relay contact.
This relay contact is further used to trip the motor or for corrective action.