Answer / Sheeshpal Singh

The difference in operating and release voltages in an AC contactor is due to the magnetic characteristics of the contactor. During operation, the higher current requires a higher magnetizing force (volt-seconds) to close the contacts. This results in a slightly higher required voltage for operation compared to release, where the contacts are separating under lower current.

why voltage rating not mention at HPSV or HPMV lamps?

2 Answers   OPS,

---

how to compute kvar in substation feeder to improve power factor and sending voltage

1 Answers  

---

Why do we use center tap transformer that used with portable tools

1 Answers  

---

high voltage transformer input voltage,current and amps rating..distributed transformer input voltage,current and amps rating...

1 Answers  

---

What is measurement?

1 Answers  

---

WHAT IS THE HIGHEST UNDERGROUND TRANSMISSION VOLTAGE IN THE WORLD?

3 Answers   Power Grid,

---

what is buffer resistance starter.?.What is the working principle and where it is used..?

1 Answers  

---

how many types of ratings are there of transformer

5 Answers   Met Trade,

---

how to check the 3ph capacitor is good or not.

14 Answers   MacLellan, Yash Technologies,

---

What are IR values and what it should be for coil and for insulator

1 Answers   GPSC Gujarat Public Service Commission,

---

In Power transformer oil temperature or winding temperature will be high

3 Answers  

---

what is the formular for the calculation of CT'S when installed as part of a electrical installation so the correct meter is used

2 Answers  

---