Answer / abdul ghouse

A relay is an electrically operated switch. Many relays use
an electromagnet to operate a switching mechanism
mechanically.

commonly there are 4 legged (pins) for relay. You can check
the mechanical switch by Ohm meter (multi meter) similar
like Elec switch testing. ON - OFF low and high resistance
it should show then it should OK or else its defective.

the other part of relay is Elec winding part can be tested
by continuity check

Answer / k.prakashchandra

By simulation

how do we calculate of transformer in va?what is calculation?

2 Answers  

---

in cable joints procedure what electrical problems have been solved out ?

1 Answers  

---

What is mean by powerfactor. What is the difference between leading and lagging power factor?

2 Answers   HCL,

---

wht is an AVO metre. and whre it is used?

1 Answers   Mayflower,

---

what are the types of Distribution transformer vector group please explain

7 Answers  

---

---

why EMF IS INDUCED IN A CONDUCTOR WHEN FLUX LINKING WITH IT CHANGES ACCORDING TO FARADAYS LAW.

0 Answers   Sail,

---

what are the main problems that happen in an emergency light and how to fix them ?

2 Answers  

---

State thevenin’s theorem?

0 Answers  

---

Current Capacity of 55sqmm & 80sqmm conductor

2 Answers  

---

what is the transmission loss for electrical supply? specifically a large shopping complex where the grid is half KM away, what will the % of transmission loss? is there any transmission loss for captive unit generation for above set? thanks

0 Answers  

---

what is the meaning of harmonic in AC waves and when which are prduce and what is the effects on line and give any other information about harmonics

1 Answers  

---

what is mean by VCB colour code..???

1 Answers   Student,

---