Answer Posted / tapas

UPS Battery Backup time= (No. of battery X Volt per battery X Battery AH)/ Load in VA

(No. of battery X Volt per battery X Battery AH)
Backup = ------------------------------------------------
time Load in VA

Note: KW should be converted to VA before applying the formula

what is basic difference betmeen normal & flame proof motor??

2184

---

Which test will be more severe for VCB?

2654

---

I have a CT meter with ratio 60/5. The meter reading of previous month was 3290.49 and that of current month was 3797.26. How many chargeable units as per normal meter should be my reading.

1409

---

I FINISHED MY B.TECH IN EEE . I AM IN NEED OF A GOOD TRAINING INSTITUTE TO DO COURSES .. CAN ANYONE SUGGEST GOOD CENTRES IN TAMILNADU ,BANGALORE ,OTHER AREAS???????

2013

---

What does the term “voltage regulation” means?

1098

---

for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

1481

---

what r the checklist while installing 500 kva transformer

2330

---

Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?

2081

---

at what base you will tell the direction of rotation of dc motors and generators?

1137

---

sir please tel me how calucalte kwh if home taken load 30ams how maney kwh taken per day.and 3phase motor 5hp per hars how maney load teken and how mach kwh and forward me to electrical table for calicalte kwh and kvr and kvah

3975

---

hi I have done 3 yrs diploma in electrical engg after 10+2. I have 16 years of work experience into design proposals sales and engg application development in LV/MV swithcgear and sub station automation field. I want to apply for immigration to new zealand but I am not sure whether I qualify or not since I dont have a degree. Can anyone advice? Thanks Riz

2283

---

Draw the DOL starter and star delta starter drawing?

2996

---

Draw the line diagram of diffretial relay connected to transformer?

2440

---

Benifits of 3ph 4 wire metering over 3ph 3 wire

2477

---

What is the role of power pack in substation protection system?

2699

---