What are the temperature elements?

0 Answers  

---

Why induction motors draws higher current during starting condition?

1 Answers  

---

What is current and voltage?

5 Answers  

---

Can u start a tube light without a starter?

8 Answers   Adani,

---

What it the purpose of parallel phasing transfomers??

4 Answers   ABB, Reliance,

---

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

---

What is the use of arc chute in ACB?

7 Answers   lenovo,

---

What consists of 2 or more thermocouples to be connented series?

0 Answers  

---

Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

---

If not maintained 3 phase clearance,what happened ?

2 Answers  

---

what is the dis-advantage of 3 phase 3 wire energy meter?

1 Answers   Exide, Nelco,

---

why multiplying factor is used in wattmeter???

1 Answers   Nippon,

---