Answer / thwosif_emrson

By using a LDR needs no manual operation for switching ON
and OFF. When there is need of light. It detects itself
weather there is need for light or not. When darkness rises
to a certain value then automatically street light is
switched ON.

Answer / vijay

LDR=LIGHT DEPENDENT RESISTOR
THE ABBREVIATION ITSELF STATES THAT LIGHT GLOWS DEPENDING
UPON THE VALUE OF RESISTANCE.
LDR IS CONNECTED IN PARALLEL TO THE LIGHT.
IF RESISTANCE IS MORE LIGHT GLOWS MORE EFFECTIVELY
IF RESISTANCE IS LOW LIGHT INTENSTITY WILL BE VERY LESS.

why no load characteristics of generator also called as occ

1 Answers  

---

The electromagnetic torque developed is proportional to what in a D.C series motor?

0 Answers   HPCL,

---

how cables go in and come out for distribution from the feeder pillar box?

0 Answers   CESC,

---

I BOUGHT A HAVELLS ACCL WITH GENERATOR STOP FASCILITY(i.e- BASICALLY IT IS A AUTO CHANGE OVER SWITCH) FOR MY HONDA EXK 2000S HOME GENERATOR (WHICH START IN PETROL & RUN IN KEROSENE). ACCL HAS 8 POINT. 2 FOR MAINS(PH & NUE), 2 FOR LOAD, 2 FOR GEN AND 2 FOR IGNITION POINT(X1 & X2). THE IGNITION POINT IS SPECIALLY FOR AUTO ENGINE STOP WHEN MAINS POWER RESTORE. I CONNECT THIS X1 & X2 POINT TO THE GENERATOR STATER MOTOR & EARTHING POINT. BUT WHEN MAINS FAILS THE GENERATOR COULD NOT START, BUT WHEN DISCONNECT THOSE X1 OR X2 POINT, THEN THE GENERATOR START. BUT WHEN MAINS ON THEN THE GENERATOR SHOULD START, AND WHEN I OFF THE MAINS THE GENERATOR AUTOMATICALLY STOP. PLESE HELP ME HOW I STOP THE GENERATOR AUTOMATICALLY WHEN THE MAINS RESTORE.

2 Answers   Honda,

---

What is corona ? Mention its positve effects .

1 Answers  

---

Comparative difference between 33Kv & 66KV for transmitting the load of 7 MW at a distance of 34 Km.

6 Answers   NHPC,

---

How many companies are manufacturing 33 KV HT Breaker

1 Answers  

---

How to select the cable size for the given load ?Pls explain the Formulae

3 Answers  

---

what is the charging battery current of 80 kva UPS/100AH bocket make battery.

4 Answers  

---

What are the types of transformers according to the arrangement of iron cores?

0 Answers  

---

sent to a site and asked to explain how you would like a twenty seven flour building should be supplied with lighting and sockets plus a water boiler.

0 Answers  

---

what is a switchgear. what is its work & where it is used?

5 Answers  

---