how to set time from star to delta starter

2 Answers  

---

can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??

0 Answers   MCB,

---

What is auto reclose system in Circuit breakers

1 Answers  

---

what is the difference between arc and spark

2 Answers  

---

In a carnot engine with an efficiency of 40%, the heat rejected to the sink at 27 C is 60 kJ, then the heat supplied in kJ to the engine by the sources is

0 Answers   Caterpillar,

---

---

what can i do line to line fault

4 Answers  

---

How to calculate Air conditioning capacity for a telecom BTS shelter?

0 Answers  

---

what is efficient motors and how it is different from normal induction motors

0 Answers   Sarthak Contracts,

---

1hp= how much rpm

0 Answers  

---

How to findout raw or ups power? its not indicated in socket,

0 Answers   Novo Nordisk,

---

Explain difference between stand by earth fault and residual earth fault protection?

0 Answers  

---

WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

---