Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

---

What is the function of automatic Transfer Switch(ATS) in details

3 Answers  

---

how to find under ground cable fault ??? if our cable size is 95*4 then what will load capacity with far mull

2 Answers   Imdad,

---

why and how current drawn by battery charger depends upon the altitude where it is located?

0 Answers  

---

how to calculate the over current rating of 3phase motor

2 Answers  

---

for 644KW load which MCCB should i use

6 Answers  

---

How can calculate the daily electrical consumption of 7.5 HP motor, if the moter runs 24 hrs continiously. Also have to know about 3.5 hp chiller.

0 Answers   Wipro,

---

what are the factors to be considered while design the breaker either HT or LT??

0 Answers  

---

What happened when the field winding of dc series motor is open?

2 Answers   Bhel,

---

Can anyone explain me the operating principle of the megger tester?( I just know that its diflection relates with the ratio of currents of control & diflecting coil. I need more information as breif as possible)

1 Answers   TCS,

---

What happend if we connect star point to ground of a star connected motor? And what will be effect on system and effeciency of motor?

1 Answers  

---

which type of cabel

0 Answers   DMRC,

---