For 7.5kw star delta starter how to calculate 1. Mccb rating 2. Contactor rating 3. Over load relay rating

1 Answers   L&T, MAHINDRA,

---

what is a panel board?

1 Answers  

---

what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

0 Answers  

---

Utility company give the supply to customer in KVA but bill them for Watt.why?

1 Answers   L&T,

---

What happent when a AC motor(no break and starters ) stop and suddenly start . ? Starting current low or high?? Why?

1 Answers  

---

---

What is the Minimum winding resistance of motors ( small & big)? referance range

0 Answers   TATA,

---

what purpose of the percentage impendance in transformer

3 Answers  

---

1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

0 Answers   ABC,

---

What happened when a three phase induction motor work on two phase supply.9

6 Answers  

---

why does in transformer the v/f ratio constant?

2 Answers   TATA,

---

why lightning arrestor are made in two stack of insulator but why not cvt

0 Answers  

---

what is phase angle and how its generate moreever how we measure the phasse angle?

1 Answers  

---