Answer / pswin

IP means Index of Protection. All electrical equipments have the degree of protection. First numeral shows (a) Protection of persons against contact with live or moving parts inside enclosure. (b) Protection of equipment against ingress of solid bodies. Second numeral shows protection of equipment against ingress of water. IP 55 means-(a) complete protection against contact,(b) dustproof and jet(water projected from a nozzel) proof. For IP 65, for second numeral 5 is same above and for first numeral 6 shows that it is a dust tight equipment. The greater digit shows the higher protection.

Answer / u.chandarasekar

pl refer to dinamalar and siruvar malar book

how make to Incident and accident report

1 Answers  

---

what solid earthing means?

3 Answers  

---

How to calculate that clean water supply in one Day from 150 KLD STP?

0 Answers  

---

What is servo lock in CNC how they work and if any parameter for them in CNC machine

0 Answers  

---

How is a 100 MVA transformer cooled?

9 Answers  

---

what are the analog quality input for protection function?what are minimum reqiments?

0 Answers  

---

What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.

0 Answers  

---

how to test power transformer.YNd11

0 Answers  

---

Why r use in the tap changing x' mer.

2 Answers   L&T,

---

what will be fault level of 11 KV , 2000 A ELECTRICAL SYSTEM?

4 Answers  

---

1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?

2 Answers   Automation, Indian Railways, Mogora Cosmic,

---

What happen if we have run 415 V,50Hz designed motor at on 480V,60HZ

8 Answers  

---