Answer / achuthan

MODBUS is an internationaly accepted protocol for
communicating through RS 484 network. It is used in BMS
communication between master and several slaves. This
protocol is iternationaly accepted .

A protocol defines the rules and regulations and the other
person decodes and understands it. A german communicates a
thing to others in german language, an english man in
english etc. If german is spoken to an english man he may
not understand

Answer / ravi

It is used to inerface any type of Hardware to the BMS
System,

For EX:-Fire Alarm System,PEC........

Will sag depends on the Specific Resistance of the conductor?if not Why??????????

2 Answers   BARC,

---

1. What is differential relay? How it operates?

3 Answers  

---

Can the efficiency of transformer be measured with the help of wattmeter readings taken at primary and secondary side? Support the answer.

2 Answers  

---

what is negative phase sequence

1 Answers  

---

how vector surge relay works ?

3 Answers   BFL,

---

why secondary of open delta pt (two element pt) centre tap is earth what happen when this earth is removed

1 Answers   Essar,

---

I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

0 Answers  

---

why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 Answers   ABB, ONGC,

---

Give two basic sprrd control scheme of DC shunt motor.

2 Answers  

---

What is disc insulator and it's application..?

2 Answers  

---

IF ANY MATERIAL AVAILABLE IN MARKET FOR MOTOR PROTECTION INSTEAD OF OLR & CONTACTOR ?

1 Answers  

---

how do i get electrical supervisor certificate in gujrat?

3 Answers   DGVCL Dakshin Gujarat Vij Company, Infosys, ONGC, Orient, Reliance,

---