Answer Posted / john

Online UPS, it is getting power AC is converting to DC, then
the DC source stored to Battery at power supply on mode when
power fail, the DC sorce is changed to AC by inverter so
output power is having without noise.

OFFline UPS is having automatic voltage regulator, it
getting power from supply, it is regulated by AVR, then
power stored to battery so the change over time approx 2ms
to 5ms so change over noise comes.

why current is constant on d.c?

1582

---

WILL SCHNEIDER MAKE ACB(MASTERPACT)TRIP ON REVERSE POWER?

1820

---

what happen if field of dc shunt motor opens? what is function of putting res. in parallel to one phase of 3 phase IM? the power supplied by 5A source in circuit is given by------Watt.

1554

---

can we conduct the swineburne's test on a dc series motor? why?

1635

---

what reactive how to maintain

1401

---

---

how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?

1917

---

How does the phase sequence controller works, how it identifies the phases? confirm working principle

1615

---

Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?

1611

---

HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

1714

---

Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks

1475

---

1.What will be stored in online ups EPROM IC?

1599

---

What is earth?

1796

---

What is transient Phenomenon?

1783

---

whit is 33kv power 300*300 cable full current with formula

1395

---

i karmveer bharti persuing b.tech . plz send me syllabus and name of reference books. for preparation of section eng.

1658

---