Search Results for: relays
- Temperature Measurement
What is a thermistor?
A thermistor is a resistor and its resistance would vary if its temperature changes, so basically a thermistor can be…
Read More » - PLC
PLC TIMERS & COUNTERS
Why timers and counters are used in PLC? A PLC is a specialized computer that is used to control and…
Read More » - PLC
How to install a PLC and how to do the PLC wiring?
A PLC is an industrial computer that is capable to do discrete or sequential logic in a factory environment. The…
Read More » - PLC
PLC communications
How does a PLC communicate The PLC communication is needed when the application needs to share the data outside the…
Read More » - Control Valve
What is an airlock relay?
The airlock unit is very useful in a control valve. This could provide the stay-put condition of the control valve…
Read More » - Interview Questions
50+ Industrial automation interview questions
1.What are the major functions of a supervisory control system? A. There are three major functions for a supervisory control…
Read More » - Electrical
What is earth fault relay and how is it different from RCCB?
The earth fault relay is a type of relay that can sense the faults between the phase and earth. The…
Read More » - Level Measurement
What are the electrical methods of level measurement?
Some of the level sensing devices operate by sensing or detecting the differences in the electrical properties, which is created…
Read More » - Electrical
What is a megger and how is it used
What is a megger and what does it do A megger is an electrical measuring instrument, it can be used…
Read More » - Control Valve
How to troubleshoot a control valve and How to do the preventive maintenance of the control valve
How to do the control valve inspection and maintenance The service life of a control valve could be increased by…
Read More »