Answer / samir

RCCB is nothing but only a current transformer which
detects the difference of incoming and outgoing
current,while in phase wire draws 1 amp and 1 amp returns
in neutral the net current of of CT secondary will nil,but
when Phase wire draws 1 amp and neutral will return 900 ma
(in case of leackage due to bad insulation of equipment) so
net difference of 100ma will be detected by the CT and its
secondary connected with coil and plunger,plunger will
actuate and it will trip RCCB mechanically.

Answer / nagesh.patwari

Yes, it works on Single phase.

What is the magnetic field (coil DC ) of Turbo Expander?

0 Answers   TATA,

---

What is the RMS Value. Please discribe in detail

14 Answers   Bhel,

---

What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current

0 Answers   ABB, Jindal,

---

what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?

2 Answers   Siemens,

---

What will be the effect of in HT XLPE 220 KV cable when one side of the Armour/cable ends are not grounded. Will there is difference between 3-phase voltages? like: if A. Both End of Cable grounded Phase Voltages:- V1=219 KV, v2=220 Kv, v3=220 KV. B. One End is grounded other is not: than Impact on Phase Voltages:- V1= KV, v2= Kv, v3= KV. Remain same or unchanged??

3 Answers   Jamshoro,

---

Why iron core transformers not used in high frequency applications ?

3 Answers  

---

What do you mean by boost voltage in case of battery charger?

3 Answers   MahaGenco,

---

Is motorized MCCB required rotatory handle

1 Answers  

---

I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

5 Answers   Central Moloney,

---

how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com

0 Answers  

---

Types of 132KV and 222 KV protection.

1 Answers  

---

what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

7 Answers  

---