Answer / gobind

Whan the generator have synchronized with grid the waveform
have 120 Deg each phase but at the time of any fault
occurred in the grid system,at that time the waveform of the
grid voltage have been reduced from 120 Deg to min at that
time vector Shift Relay have operated.Permissible limit of
the vector Shift 8 Deg.

Answer / ajay vikson

Hi,

here is a useful link on the vector surge relay

http://www.electrotechnik.net/2009/04/vector-surge-relay.html

Answer / k.p.sharma

We have the vector surge relay setting at 12 deg. But i observe that at that setting many time tg breaker tripped with grid breaker as per scheme only grid breaker trip is required. Please tell me is this setting ok or not.



K.P.Sharma

Dear sir, we are getting voltage fluctuations suddenly for 2 or 3 minutes again it becomes normal. we checked each and every connection some times we are getting 110 volts like that from earth to neutral again it is reducing we are getting supply from 45 kva DG set give earthing properly.

3 Answers   Triveni,

---

What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer

0 Answers  

---

What is the stander resistance value between the neutral and earth?

10 Answers   Crossdomain, Sepco,

---

As a good company employee, can you report your supervisor to the company management if he or she is going against the company interest in his or her actions?

1 Answers   MAHINDRA,

---

i) in which cases should we go for neutral and where should we go for ground? ii) in domestic supply we are getting 230v a.c.and what is the amount of current?

2 Answers  

---

---

I do wonder why current is present in neutral wire?i check single phase lead current feeding air conditioner...on its phase its current was 10A while same was 10A in neutral...as we know in neutral voltage is zero so if voltage is zero then how current appears on amp meter? my second observation is (just imagination)when I touch phase wire it give me shock but when i touch neutral nothing happens although as above its carrying current(amps) third but with same logic...as in simple Alternate current sine curve there is + and there is negative peak.means every time phase changing so how come every time same phase and same neutral stand (pardon for english mistakes)

1 Answers  

---

why we avoid parallel operation of diesl generator?

4 Answers  

---

for 644KW load which MCCB should i use

6 Answers  

---

WHAT ARE THE DISADTAGES OF SINGLE-WIRE-EARTH-RETURN SYSTEM USED FOR RURAL ELECTRIFICATION?

0 Answers  

---

what is Electrical BMS

3 Answers  

---

How many capacitors using in LT panel as per Govt rules?

0 Answers   Electrical Tech,

---

what do you mean by earth fault in transformer?

2 Answers   L&T, UPL,

---