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

What is the Difference Between the SCADA & PLC ? Both it also control and Supervise Then what Special in Scada & PLC?

1 Answers  

---

why use -48 volt DC power in telecom?

3 Answers  

---

what is a panel board?

1 Answers  

---

Application of statically induced emf

0 Answers  

---

why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?

0 Answers  

---

How to know vacuum in vacuum cylinder of breaker in working condition

0 Answers  

---

What is vacuum circuit breaker.define with cause and where be use it device?

0 Answers  

---

In Fluorescent tube there is a writing like 6500k . what this 6500k represents?

4 Answers  

---

what is inrush current in transformer?

17 Answers   Bhel, Essar, GMR,

---

what maximum range of star & delta in hp or kw ?

0 Answers   Makkah Hilton Towers,

---

it is possible to run 130V AC and 230 V AC cables run in same tray

2 Answers  

---

How to define Kirchhoff current law and voltage law along with simply examples.

0 Answers  

---