Answer / jonathan r. lambert

Try programming your PLC to perform the functions of a
simple traffic light. This will work best if you have red,
green and yellow LED's or incandescant lamps mounted upon a
model intersection. If this appears too simple, you can
also include left turn arrows and even better, include a
proximity switch for an actuated intersection - where the
presence of a "car" is recognized and used to alter the
program so the car gets a green light. I've done this with
multiple PLC's and intersections where cars moving in a
single direction through multiple intersections receive a
progression of all green lights. Good luck.

What is the allowalable frequency variation in India and in US? Why there is the difference?

3 Answers  

---

1 ton AC takes how much current( starting & stable)

15 Answers  

---

Electrical 'C' license full abbreviation , and full form

0 Answers  

---

Earth Resistivity

2 Answers  

---

which pole motor is best ?4 pole motor or 6 pole motor,why?

2 Answers  

---

What is difference between Electrical & Electronic Device? 

7 Answers   AZ Engineering, Vodafone,

---

What is BUCKBOOST TRANSFORMER and Operation of Buckboost transformer?

4 Answers   Voltamp,

---

what is the diff between earth leakage relay and earth fault relay?

7 Answers  

---

63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?

0 Answers   GSECL, L&T,

---

could i arrange a faulty and healthey battery bank togather in parallel , if your ans is not then why?

3 Answers  

---

transformers parts & function of each parts

25 Answers   Amara Raja, Bhutan Ferro Alloys Limited, Breather, Electrical, Electrical Tech, ERDA, GVK, Juniper Networks, Matrix, Mechanical, NFL, Oracle, Pyramid Plastics, RPPL, RRB, Siemens, TCS, Tulip Silk Mills,

---

What is the method & formula of Fault level calculation in power Transformesr.

3 Answers  

---