what is the formula for backup time of online ups?

1 Answers  

---

What is chopper

1 Answers   Enercon,

---

Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!

0 Answers  

---

Is HT capacitor rating connected directly to motor terminals , related to motor no load current?

0 Answers  

---

What is the difference between MCCB and MCB ?

4 Answers   Siemens,

---

How each of the following losses occur in d.c machines (i) copper (2)core (3) windage (4)friction please help me

0 Answers  

---

how to calculate the ac and dc wire losses with calculations plz tell me

3 Answers   Apollo,

---

resistance switching is used in case of- ? a. air blast CB b. bulk oil CB c. minimum oil CB d. all types of CB

4 Answers   HCL, SSC,

---

EXPLAIN WHY THE SURGE CURRENT RATING OF AN MCCB OR CIRCUIT BREAKER DECREASES WITH INCREASE IN THE RATING OF MCCB OR CIRCUIT BREAKER.

0 Answers  

---

defination of controlled shunt reactor

0 Answers  

---

As per principle we say in three phase supply ,the voltage is producing by phase angle between two phase so two phase is needed means then why we using three phase ?

2 Answers  

---

Why is a synchronous motor always star connected??

0 Answers   Bhushan Power Steel,

---